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Nissan

Nissan Ariya: Dtc Diagnosis

Nissan Ariya (FE0) 2023-2025 Service & Repair Manual / Ventilation, Heater & Air Conditioner / Heater & Air Conditioning Control System :: Automatic Air Conditioning / Dtc Diagnosis

B2480-93 Front Mode Door Motor Rh

DTC Description

DTC DETECTION LOGIC

NOTE:

“Rear air mix door motor” is indicated on CONSULT display, however this means front mode door motor (passenger side) on this model.

If multiple of door motors DTC (B2480-93, B24DF-93, B24F5-93, B24F6-93, B24F7-93, B24F8-93) are detected, check “DOOR MOTOR CIRCUIT”. Refer to Diagnosis Procedure.

DTC No. CONSULT screen terms DTC detection condition
B2480-93 Rear air mix door motor Diagnosis condition Power switch ON
Signal (Terminal) LIN (door motor) signal
Threshold Drive error of front mode door motor (passenger side) is detected
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector [front mode door motor (passenger side) circuit is open or shorted to ground]

  • Front mode door motor (passenger side) installation condition

  • Front mode door motor (passenger side)

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between front mode door motor RH harness connector and A/C auto amp. harness connector.

+ - Voltage
Front mode door motor RH A/C auto amp.
Connector Terminal Connector Terminal
M906 1 M1 58 10.5 – 16 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 5.

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect front mode door motor RH connector and A/C auto amp. connector.

  3. Check continuity between front mode door motor RH harness connector and A/C auto amp. harness connector.

    Front mode door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M906 2 M2 27 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) LIN SIGNAL CIRCUIT

  1. Connect front mode door motor RH connector and A/C auto amp. connector.

  2. Power switch ON.

  3. Confirm output waveform between front mode door motor RH harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    Front mode door motor RH A/C auto amp.
    Connector Terminal Connector Terminal
    M906 3 M1 58

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 6.

CHECK INSTALLATION OF FRONT MODE DOOR MOTOR (PASSENGER SIDE)

Check front mode door motor RH is properly installed. Refer to Exploded View.

Is the inspection result normal?

YES>>

Replace front mode door motor RH. Refer to Removal & Installation.

NO>>

Repair or replace malfunctioning part.

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect front mode door motor RH connector and A/C auto amp. connector.

  3. Check continuity between front mode door motor RH harness connector and A/C auto amp. harness connector.

    Front mode door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M906 1 M2 21 Existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect front mode door motor RH connector and A/C auto amp. connector.

  3. Check continuity between front mode door motor RH harness connector and A/C auto amp. harness connector.

    Front mode door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M906 3 M2 2 Existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

B2481-02 Ptc Heater

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2481–02 PTC heater LIN communication error Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) LIN (PTC heater) signal
Threshold Detects abnormalities in the signal transmitted from the PTC heater
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • PTC heater

  • A/C auto amp.

  • Harness or connectors (PTC heater communication circuit is open or shorted)

FAIL-SAFE

PTC heater operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK PTC HEATER LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect PTC heater and A/C auto amp. connector.

  3. Check continuity between PTC heater harness connector and A/C auto amp. harness connector.

    PTC heater A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M323 9 M1 52 Existed

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair harness or connector.

CHECK PTC HEATER LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Heat pump control unit

    • Li-ion battery

    • Electric compressor

  2. Check continuity between PTC heater harness connector and ground.

    PTC heater — Continuity
    Connector Terminal
    M323 9 Ground Not existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK PTC HEATER POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between PTC heater harness connector and ground.

    + - Voltage
    PTC heater
    Connector Terminal
    M323 6 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace PTC heater 12 V power supply circuit.

CHECK PTC HEATER GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Check continuity between PTC heater harness connector and ground.

PTC heater — Continuity
Connector Terminal
M323 8 Ground Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK A/C AUTO AMP.

With CONSULT

  1. Reconnect all harness connectors disconnected.

  2. Set the Nissan Ariya vehicle to READY.

  3. Using CONSULT, perform “HVAC TEST” on “Active Test” of “HVAC”. Refer to CONSULT Function.

  4. Check that the PTC heater operates normally in each mode.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Replace A/C auto amp. (refer to Removal & Installation). Then GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Replace PTC heater. Refer to Removal & Installation.

NO>>

INSPECTION END

B2483-19 Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2483–19 Compressor internal circuit Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold When the electric compressor over current
Diagnosis delay time Less than 1 seconds

POSSIBLE CAUSE

Electric compressor

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE ELECTRIC COMPRESSOR

Replace electric compressor. Refer to Removal & Installation.

>>

INSPECTION END

B2486-19 Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2486–19 Compressor low speed high load Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold When the driving load of the electric compressor reaches a maximum value during slow rotation
Diagnosis delay time Less than 1 seconds

POSSIBLE CAUSE

  • Electric compressor

  • Cooling fan

  • Overfilled refrigerant

  • Refrigerant cycle unusual

  • High voltage junction box

  • High voltage harness or connectors (electric compressor high voltage circuit is open)

FAIL-SAFE

Electric compressor speed increase

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Refer to Leak Test.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK COOLING FAN OPERATION

Check cooling fan. Refer to Component Function Check.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace malfunctioning parts.

CHECK REFRIGERANT CYCLE

Check refrigerant cycle. Refer to Symptom Table.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace malfunctioning parts.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 5.

CHECK ELECTRIC COMPRESSOR HIGH VOLTAGE CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect electric compressor and PTC heater connector.

  3. Check continuity between electric compressor harness connector and PTC heater harness connector.

    Electric compressor PTC heater Continuity
    Connector Terminal Connector Terminal
    H9 7 H2 2 Existed

Is the inspection result normal?

YES>>

Replace electric compressor. Refer to Removal & Installation.

NO>>

GO TO 6.

CHECK ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS FOR OPEN

  1. Disconnect high voltage junction box connector.

  2. Check continuity between electric compressor harness connector and high voltage junction box harness connector.

    Electric compressor High voltage junction box Continuity
    Connector Terminal Connector Terminal
    H9 7 H11 18 Existed

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Replace high voltage harness between electric compressor and high voltage junction box.

CHECK FUSE INSIDE OF HIGH VOLTAGE JUNCTION BOX

NOTE:

A fuse is built into the high voltage junction box, and a continuity check is performed to check if the fuse has blown.

Check continuity between each terminal of the high voltage junction box.

High voltage junction box Continuity
Connector Terminal Connector Terminal
H11 18 () H1 14 () Existed

Is the inspection result normal?

YES>>

Replace electric compressor. Refer to Removal & Installation.

NO>>

GO TO 8.

CHECK ELECTRIC COMPRESSOR

Check electric compressor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace high voltage junction box. Refer to HIGH VOLTAGE JUNCTION BOX : Disassembly & Assembly.

NO>>

Replace electric compressor (refer to Removal & Installation.), and then replace high voltage junction box. Refer to HIGH VOLTAGE JUNCTION BOX : Disassembly & Assembly.

Component Inspection

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK ELECTRIC COMPRESSOR

  1. Power switch OFF.

  2. Disconnect electric compressor connector.

  3. Check voltage between electric compressor terminals using circuit tester diode mode.

    + - Voltage
    Electric compressor
    Terminal
    8 7 0.4 – 1.0 V

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric compressor. Refer to Removal & Installation.

B2489-17 Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2489–17 Compressor high voltage Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold When the high voltage system input voltage is more than 420 V
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Electric compressor

  • Li-ion battery

  • Front traction motor inverter

FAIL-SAFE

Electric compressor stopped operation.

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Operate the air conditioning system.

  3. Set the temperature to full cold.

  4. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK LI-ION BATTERY

Check Li-ion battery. Refer to Work Flow.

Is the inspection result normal?

YES>>

GO TO 2 .

NO>>

Repair or replace malfunctioning parts.

CHECK INVERTER (FRONT)

Check inverter (front). Refer to Work Flow.

Is the inspection result normal?

YES>>

Replace electric compressor. Refer to Removal & Installation.

NO>>

Repair or replace malfunctioning parts.

B248c-09 Refrigerant Leak

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B248C–09 Refrigerant gas leak Diagnosis condition Power switch ON
Signal (terminal) —
Threshold Refrigerant is leaking or not in
Diagnosis delay time —

POSSIBLE CAUSE

  • Refrigerant is leaking or not in

  • Refrigerant pressure sensor

  • VCM

  • Harness or connectors (refrigerant pressure sensor and VCM circuit is open or shorted)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK REFRIGERANT PRESSURE SENSOR SYSTEM

Check refrigerant pressure sensor system. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning part.

CHECK REFRIGERANT LEAK

Check refrigerant leak. Refer to Leak Test.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace malfunctioning part.

B2494-13 Heated Steering Wheel Relay

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2494-13 Heated steering wheel relay Diagnosis condition Power switch ON
Signal (Terminal) Heated steering wheel relay control circuit
Threshold Heated steering wheel relay control circuit is open or shorted to ground
Diagnosis delay time 1 second or more

POSSIBLE CAUSE

  • Fuse

  • Steering heater relay

  • A/C auto amp.

  • Harness or connectors (heated steering wheel relay control circuit is open or shorted to ground)

FAIL-SAFE

Heated steering wheel operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK FUSE

  1. Power switch OFF.

  2. Check that the following fuse is not blown (open).

Unit Location Fuse No. Capacity
Steering heater relay Fuse block (J/B) #70 10A

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

NO>>

GO TO 2.

CHECK STEERING HEATER RELAY CONTROL SIGNAL CIRCUIT

  1. Disconnect A/C auto amp. connector.

  2. Power switch ON.

  3. Check voltage between A/C auto amp. harness connector and ground.

    + - Voltage
    A/C auto amp.
    Connector Terminal
    M1 56 Ground Battery voltage

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

GO TO 3.

CHECK STEERING HEATER RELAY POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Remove steering heater relay.

  3. Power switch ON.

  4. Check voltage between steering heater relay harness connector and ground.

    + - Voltage
    Steering heater relay
    Connector Terminal
    M118 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK STEERING HEATER RELAY CONTROL SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Check continuity between steering heater relay harness connector and A/C auto amp. harness connector.

Steering heater relay A/C auto amp. Continuity
Connector Terminal Connector Terminal
M118 2 M1 56 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK STEERING HEATER RELAY CONTROL SIGNAL CIRCUIT FOR SHORT

Check continuity between steering heater relay harness connector and ground.

Steering heater relay — Continuity
Connector Terminal
M118 2 Ground Not existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

CHECK STEERING HEATER RELAY

Check steering heater relay. Refer to Component Inspection.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace steering heater relay.

Component Inspection

CHECK STEERING HEATER RELAY

  1. Power switch OFF.

  2. Remove steering heater relay.

  3. Check continuity between steering heater relay terminals.

    Terminal Condition Continuity
    Steering heater relay
    12 V direct current supply between terminals and . Existed
    No current supply Not existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace steering heater relay.

B2497-96 Battery Coolant Heater

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2497-96 Battery coolant heater IGBT circuit 1 Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold When battery coolant heater IGBT circuit 1 short is detected
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

Battery coolant heater

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE BATTERY COOLANT HEATER

Replace battery coolant heater.

>>

INSPECTION END

B24a0-49 A/c Auto Amp.

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24A0-49 Air conditioning automatic amplifier Diagnosis condition Power switch ON
Signal (Terminal) —
Threshold A malfunction is detected in A/C auto amp. internal EEPROM memory functions.
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE A/C AUTO AMP.

Replace A/C auto amp. Refer to Removal & Installation.

>>

INSPECTION END

B24a1-16 A/c Auto Amp. Power Supply

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24A1-16 Air conditioning automatic amplifier power supply Diagnosis condition Power switch ON
Signal (Terminal) Accessory power supply
Threshold When the power of the A/C auto amp. goes down
Diagnosis delay time Less than 1 second

POSSIBLE CAUSE

  • A/C auto amp.

  • Harness or connector (accessory power supply circuits is open or short)

FAIL-SAFE

Air conditioning system operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK A/C AUTO AMP. POWER SUPPLY AND GROUND CIRCUITS

Check A/C auto amp. power supply and ground circuits. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair or replace malfunctioning parts.

B24a2-55 Configuration Error

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24A2-55 Configuration not implement Diagnosis condition Power switch ON
Signal (Terminal) —
Threshold Nissan Ariya Vehicle specification is not written
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

Configuration is not completed

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

PERFORM CONFIGURATION

Perform configuration. Refer to Work Procedure.

>>

INSPECTION END

B24a4-11 Intake Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24A4-11 Intake sensor Diagnosis condition Power switch ON
Signal (Terminal) Intake sensor signal
Threshold The intake sensor recognition temperature is too high [more than 100°C (212°F)]
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Intake sensor

  • A/C auto amp.

  • Harness or connectors (the sensor circuit is shorted to ground)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK INTAKE SENSOR SIGNAL

  1. Power switch ON.

  2. Check voltage between A/C auto amp. harness connector.

    A/C auto amp. Voltage
    Connector Terminal
    + -
    M2 23 26

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK INTAKE SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect intake sensor connector.

  3. Power switch ON.

  4. Check voltage between intake sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Intake sensor
    Connector Terminal
    M316 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK INTAKE SENSOR

Check intake sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Replace intake sensor. Refer to Removal & Installation.

CHECK INTAKE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between intake sensor harness connector and ground.

    Intake sensor — Continuity
    Connector Terminal
    M316 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK INTAKE SENSOR

  1. Power switch OFF.

  2. Remove intake sensor. Refer to Removal & Installation.

  3. Check resistance between intake sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 16.43
    −10 (14) 9.90
    0 (32) 6.19
    10 (50) 4.01
    20 (68) 2.67
    25 (77) 2.20
    30 (86) 1.83
    40 (104) 1.28

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace intake sensor. Refer to Removal & Installation.

B24a9-11 Sunload Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24A9-11 SUNLOAD SENSOR Diagnosis condition Power switch ON
Signal (Terminal) Sunload sensor signal
Threshold Detected calorie at sunload sensor 1516 W/m2 (1304 kcal/m2·h) or more
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Sunload sensor

  • A/C auto amp.

  • Harness or connectors (the sensor circuit is shorted to ground)

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK SUNLOAD SENSOR SIGNAL

  1. Power switch ON.

  2. Check that the voltage between the A/C auto amp. Nissan Ariya vehicle-side harness connectors changes when an approx. 60 W light is moved closer to or away from the sensor.

    A/C auto amp. Condition
    Connector Terminal
    + -
    M1 47 78

    NOTE:

    • The output voltage changes according to the sunload.

    • The sunload amount produced by direct sunshine in fair weather is equivalent to approx. 0.77 kW/m2.

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK SUNLOAD SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect sunload sensor connector.

  3. Power switch ON.

  4. Check voltage between sunload sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Sunload sensor
    Connector Terminal
    M135 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

REPLACE SUNLOAD SENSOR

  1. Replace sunload sensor. Refer to Removal & Installation.

  2. Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

INSPECTION END

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between sunload sensor harness connector and ground.

    Sunload sensor — Continuity
    Connector Terminal
    M135 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

B24a9-15 Sunload Sensor

DTC Description

DTC DETECTION LOGIC

NOTE:

Sunload sensor may register a malfunction when indoors, at dusk, or at other times when light is insufficient. When performing the diagnosis indoors, use a lamp (60 W or more) that is pointed at the sunload sensor.

DTC No. CONSULT screen terms DTC detection condition
B24A9-15 SUNLOAD SENSOR Diagnosis condition Power switch ON
Signal (Terminal) Sunload sensor signal
Threshold Detected calorie at sunload sensor 35.3 W/m2 (30 kcal/m2·h) or less
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Sunload sensor

  • A/C auto amp.

  • Harness or connectors (the sensor circuit is open or shorted to battery)

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK SUNLOAD SENSOR SIGNAL

  1. Power switch ON.

  2. Check that the voltage between the A/C auto amp. Nissan Ariya vehicle-side harness connectors changes when an approx. 60 W light is moved closer to or away from the sensor.

    A/C auto amp. Condition
    Connector Terminal
    + -
    M1 47 78

    NOTE:

    • The output voltage changes according to the sunload.

    • The sunload amount produced by direct sunshine in fair weather is equivalent to approx. 0.77 kW/m2.

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK SUNLOAD SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect sunload sensor connector.

  3. Power switch ON.

  4. Check voltage between sunload sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Sunload sensor
    Connector Terminal
    M135 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 5.

CHECK SUNLOAD SENSOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between sunload sensor harness connector and A/C auto amp harness connector.

    Sunload sensor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M135 2 M1 78 Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

REPLACE SUNLOAD SENSOR

  1. Replace sunload sensor. Refer to Removal & Installation.

  2. Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

INSPECTION END

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Ignition switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between sunload sensor harness connector and A/C auto amp. harness connector.

    Sunload sensor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M135 1 M1 47 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

CHECK SUNLOAD SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check voltage between sunload sensor harness connector and ground.

+ -

Voltage

(Approx.)
Sunload sensor
Connector Terminal
M135 1 Ground 0 V

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

B24ae-15 Ptc Heater Outlet Air Temperature Sensor Lh

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24AE-15 PTC heater outlet air temp sensor left Diagnosis condition Power switch ON
Signal (Terminal) PTC heater outlet air temperature sensor LH signal
Threshold PTC heater outlet air temperature sensor (driver side) recognition temperature is too low [less than -42°C (-44°F)]
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • PTC heater outlet air temperature sensor (driver side)

  • A/C auto amp.

  • Harness or connectors (the sensor circuit is open or shorted to battery)

FAIL-SAFE

PTC heater operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (DRIVER SIDE) SIGNAL

  1. Power switch ON.

  2. Check voltage between A/C auto amp. harness connector.

    A/C auto amp. Voltage
    Connector Terminal
    + -
    M1 59 78

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (DRIVER SIDE) POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect PTC heater outlet air temperature sensor LH connector.

  3. Power switch ON.

  4. Check voltage between PTC heater outlet air temperature sensor LH harness connector and ground.

    + -

    Voltage

    (Approx.)
    PTC heater outlet air temperature sensor LH
    Connector Terminal
    M903 6 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 5.

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (DRIVER SIDE) GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between PTC heater outlet air temperature sensor LH harness connector and A/C auto amp. harness connector.

    PTC heater outlet air temperature sensor LH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M903 26 M1 78 Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (DRIVER SIDE)

Check PTC heater outlet air temperature sensor LH. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Replace PTC heater outlet air temperature sensor LH. Refer to Removal & Installation.

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (DRIVER SIDE) POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between PTC heater outlet air temperature sensor LH harness connector and A/C auto amp. harness connector.

    PTC heater outlet air temperature sensor LH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M903 6 M1 59 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (DRIVER SIDE) POWER SUPPLY CIRCUIT FOR SHORT

Check voltage between PTC heater outlet air temperature sensor LH harness connector and ground.

+ -

Voltage

(Approx.)
PTC heater outlet air temperature sensor LH
Connector Terminal
M903 6 Ground 0 V

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove PTC heater outlet air temperature sensor. Refer to Removal & Installation.

  3. Check resistance between PTC heater outlet air temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.91
    −10 (14) 9.59
    0 (32) 6.00
    10 (50) 3.88
    20 (68) 2.58
    25 (77) 2.13
    30 (86) 1.77
    40 (104) 1.24

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace PTC heater outlet air temperature sensor. Refer to Removal & Installation.

B24b4-02 A/c Control

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24B4-02 Air conditioning control Diagnosis condition Power switch ON
Signal (terminal) LIN (A/C control) signal
Threshold Receive internal circuit error message via A/C control to LIN communication
Diagnosis delay time 30 seconds or more

POSSIBLE CAUSE

A/C control (internal circuit malfunction)

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1 >>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2 >>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

PERFORM SELF DIAGNOSTIC RESULT

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

  3. Touch “ERASE”.

  4. Power switch OFF.

  5. Power switch ON.

  6. Perform “DTC CONFIRMATION PROCEDURE”. Refer to DTC Description.

Is DTC detected again?

YES>>

Replace A/C control. Refer to Removal & Installation.

NO>>

INSPECTION END

B24c6-12 Blower Motor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24C6-12 BLOWER MOTOR CONTROL Diagnosis condition Blower motor ON
Signal (Terminal) Blower motor control signal
Threshold Blower motor control signal circuit is short to battery
Diagnosis delay time 1 seconds or more

POSSIBLE CAUSE

  • Harness or connectors (blower motor control signal circuit is shorted to battery)

  • Blower motor

  • A/C auto amp.

FAIL-SAFE

Blower motor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK BLOWER MOTOR CONTROL SIGNAL

  1. Power switch ON.

  2. Check duty ratios between A/C auto amp. harness connectors by using an oscilloscope.

    + - Condition Output waveform
    A/C auto amp.
    Connector Terminal Connector Terminal
    M2 34 M1 58 Blower motor: OFF 10.5 – 16 V
    Blower motor: 1st speed (manual)

    Blower motor: 7th speed (manual)

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK BLOWER MOTOR CONTROL SIGNAL CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect blower motor connector and A/C auto amp. connector.

  3. Check voltage between blower motor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Blower motor
    Connector Terminal
    M330 1 Ground 0 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

REPLACE BLOWER MOTOR

  1. Connect A/C auto amp. connector.

  2. Replace blower motor. Refer to Removal & Installation.

  3. Power switch ON.

  4. Change fan speed from 1st – 7th, and check that blower motor operates normally.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace A/C auto amp. Refer to Removal & Installation.

B24c7-98 Ptc Heater

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24C7–98 PTC heater internal temperature sensor Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold When the PTC heater circuit board internal temperature is 115°C (239°F) or more
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • PTC heater

  • Blower motor system

  • Air mix door motor system

FAIL-SAFE

PTC heater operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full hot.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK BLOWER MOTOR SYSTEM

Check the blower motor system. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK AIR MIX DOOR MOTOR SYSTEM

Check the air mix door motor system. Refer to following DTC diagnosis procedure.

  • Air mix door motor LH: Refer to Diagnosis Procedure.

  • Air mix door motor RH: Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

Replace PTC heater. Refer to Removal & Installation.

NO>>

Repair or replace malfunctioning parts.

B24d2-19 Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24D2-19 Compressor HVIL circuit Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold When HVIL open circuit is detected in electric compressor system
Diagnosis delay time Less than 1 seconds

POSSIBLE CAUSE

  • High voltage harness connector connecting malfunction

  • High voltage harness connector

  • Electric compressor

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

DIAGNOSIS PROCEDURE

CAUTION:

Erase DTC after the work is completed.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK THE CONNECTION STATUS OF THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNECTOR

Check that the high voltage harness connector of electric compressor is connected normally.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Reconnect the high voltage harness connector. If reconnecting is impossible due to high voltage harness connector malfunction, replace the high voltage harness between electric compressor and high voltage junction box.

CHECK THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNECTOR

  1. Disconnect the electric compressor high voltage harness connector.

  2. Check for any adhering foreign substances, cracking, or damage on the high voltage harness connector terminal of electric compressor.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Replace the high voltage harness between electric compressor and high voltage junction box.

CHECK THE HVIL CIRCUIT OF THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNECTOR

Check for continuity between HVIL circuit terminals of electric compressor Nissan Ariya vehicle side high voltage harness connector. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace electric compressor. Refer to Removal & Installation.

NO>>

Replace the high voltage harness between electric compressor and high voltage junction box.

B24d3-08 Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24D3–08 Electric compressor communication Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) LIN (high voltage component) signal
Threshold Detects abnormalities in the signal transmitted from the high voltage component
Diagnosis delay time 30 seconds or more

POSSIBLE CAUSE

  • A/C auto amp.

  • Harness or connectors (high voltage component circuit is open or shorted)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK ELECTRIC COMPRESSOR LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect electric compressor and A/C auto amp. connector.

  3. Check continuity between electric compressor harness connector and A/C auto amp. harness connector.

    Electric compressor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    F7 2 M1 52 Existed

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair harness or connector.

CHECK ELECTRIC COMPRESSOR LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • PTC heater

    • Heat pump control unit

    • Li-ion battery

  2. Check continuity between electric compressor harness connector and ground.

Electric compressor — Continuity
Connector Terminal
F7 2 Ground Not existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

PERFORM DTC CONFIRMATION PROCEDURE

  1. Reconnected all disconnected harness connectors.

  2. Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

INSPECTION END

B24d4-08 A/c Control

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24D4-08 LIN communication 2 Diagnosis condition Power switch ON
Signal (Terminal) LIN (A/C control) signal
Threshold Receive internal circuit error message via A/C control to LIN communication
Diagnosis delay time 30 seconds or more

POSSIBLE CAUSE

  • Fuse

  • Harness and connector (A/C control circuit is open or shorted)

  • A/C control

  • A/C auto amp.

FAIL-SAFE

If a LIN communication error exists between the A/C auto amp. and A/C control for 30 seconds or longer, air conditioning is controlled under the following conditions:

Set temperature : Setting before communication error occurs
Air outlet : AUTO
Blower fan speed : AUTO
Air inlet : FRE (Fresh air intake)
Electric compressor : ON

DTC CONFIRMATION PROCEDURE

PERFORM SELF-DIAGNOSIS

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK FUSE

  1. Power switch OFF.

  2. Check that the following fuse is not blown (open).

    Unit Location Fuse No. Capacity
    A/C control Fuse and fusible link block #81 10A

    NOTE:

    For details of fuse, connector and terminal arrangement. Refer to Wiring Diagram.

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

NO>>

GO TO 2.

CHECK A/C CONTROL POWER SUPPLY

  1. Disconnect A/C control connector.

  2. Power switch ON.

  3. Check voltage between A/C control harness connector and ground.

    + - Voltage
    A/C control
    Connector Terminal
    M69 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the A/C control power supply circuit.

CHECK A/C CONTROL GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Check continuity between A/C control harness connector and ground.

    A/C control — Continuity
    Connector Terminal
    M69 6 Ground Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK A/C CONTROL LIN SIGNAL

  1. Connect A/C control connector.

  2. Power switch ON.

  3. Confirm output waveform between A/C control harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    A/C control A/C auto amp.
    Connector Terminal Connector Terminal
    M69 7 M1 58

Is the inspection result normal?

YES>>

Replace A/C control. Refer to Removal & Installation.

NO>>

GO TO 5.

CHECK LIN COMMUNICATION SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect A/C control connector and A/C auto amp. connector.

  3. Check continuity between A/C control harness connector and A/C auto amp. harness connector.

    A/C control A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M69 7 M1 68 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

CHECK LIN COMMUNICATION SIGNAL CIRCUIT FOR SHORT

  1. Check continuity between A/C control harness connector and ground.

    A/C control — Continuity
    Connector Terminal
    M69 7 Ground Not existed

  2. Check voltage between A/C control harness connector and ground.

    + -

    Voltage

    (Approx.)
    A/C control
    Connector Terminal
    M69 7 Ground 0 V

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

B24d8-4b Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24D8–4B Compressor internal temperature sensor Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold The electric compressor ipm temperature is too high
Diagnosis delay time Less than 1 seconds

POSSIBLE CAUSE

  • Refrigerant leakage

  • Refrigerant insufficient

  • Refrigerant cycle unusual

FAIL-SAFE

Electric compressor operation is stopped or speed is limited

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Refer to Leak Test.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK REFRIGERANT CYCLE

Check refrigerant cycle. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace malfunctioning parts.

RE-FILLING REFRIGERANT

Collect refrigerant, and charge the air conditioning system from a new service can with the specified amount refrigerant. Refer to Charge Refrigerant.

>>

INSPECTION END

B24dd-19 Battery Coolant Heater

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24DD-19 Battery coolant heater HVIL circuit Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold When HVIL open circuit is detected in battery coolant heater system
Diagnosis delay time Less than 1 seconds

POSSIBLE CAUSE

  • High voltage harness connector connecting malfunction

  • High voltage harness connector

  • Battery coolant heater

FAIL-SAFE

Battery coolant heater operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

DIAGNOSIS PROCEDURE

CHECK THE HVIL CIRCUIT OF THE BATTERY COOLANT HEATER HIGH VOLTAGE HARNESS CONNECTOR

Check for continuity between HVIL circuit terminals of battery coolant heater Nissan Ariya vehicle side high voltage harness connector. Refer to Diagnosis Procedure.

>>

INSPECTION END

B24ea-97 Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24EA–97 Compressor shutdown Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold

When the following DTC is detected

  • B24D8–4B: Compressor internal temp sensor

  • B24F9–1C: Compressor intelligent power module temperature sensor
Diagnosis delay time Less than 1 seconds

POSSIBLE CAUSE

Detecting the following DTC, the stopped due to electric compressor protection is detected.

  • B24D8–4B: Refer to DTC Description.

  • B24F9–1C: Refer to DTC Description.

FAIL-SAFE

Electric compressor operation is stopped or speed is limited

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

NOTE:

DTC B24EA–97 is displayed together with (any of) DTC B24D8–4B or B24F9–1C, perform the diagnosis procedure of each DTC.

CHECK DTC

Perform the following DTC diagnosis procedure.

  • B24D8–4B: Refer to DTC Description.

  • B24F9–1C: Refer to DTC Description.

>>

INSPECTION END

B24ed-1c Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24ED–1C Compressor current consumption error Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold

When A/C auto amp. receives a voltage shortage signal from the electric compressor

(Electric compressor required rotation speed is 1 or more)
Diagnosis delay time Less than 1 second

POSSIBLE CAUSE

  • Electric compressor

  • Li-ion battery

  • Front traction motor inverter

  • High voltage junction box

  • High voltage harness or connectors (electric compressor high voltage circuit is open or shorted)

FAIL-SAFE

Electric compressor stopped operation.

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

DIAGNOSIS PROCEDURE

CAUTION:

Erase DTC after the work is completed.

CHECK LI-ION BATTERY

Check Li-ion battery. Refer to Work Flow.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK INVERTER (FRONT)

Check inverter (front). Refer to Work Flow.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace malfunctioning parts.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 4.

CHECK ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS POWER SUPPLY CIRCUIT FOR OPEN

  1. Disconnect electric compressor and high voltage junction box connector.

  2. Check continuity between electric compressor high voltage harness connector and high voltage junction box high voltage harness connector.

    Electric compressor High voltage junction box Continuity
    Connector Terminal Connector Terminal
    H9 8 H11 19 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace high voltage harness between electric compressor and high voltage junction box.

CHECK ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS GROUND CIRCUIT

Check continuity between electric compressor high voltage harness connector and high voltage junction box high voltage harness connector.

Electric compressor High voltage junction box Continuity
Connector Terminal Connector Terminal
H9 7 H11 18 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Replace high voltage harness between electric compressor and high voltage junction box.

CHECK HIGH VOLTAGE CIRCUIT

Check high voltage junction box high voltage harness and Li-ion battery high voltage harness. Refer to Wiring Diagram.

Is the inspection result normal?

YES>>

Replace electric compressor. Refer to Removal & Installation.

NO>>

Replace high voltage harness between high voltage junction box and Li-ion battery.

B24ed-97 Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24ED–97 Compressor current consumption error Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold

The input current to the electric compressor too high

(13.5 A or more)
Diagnosis delay time Less than 1 seconds

POSSIBLE CAUSE

  • Electric compressor

  • Cooling fan

  • Overfilled refrigerant

  • Refrigerant cycle unusual

FAIL-SAFE

Electric compressor speed is limited

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Refer to Leak Test.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK COOLING FAN OPERATION

Check cooling fan. Refer to Component Function Check.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace malfunctioning parts.

CHECK REFRIGERANT CYCLE

Check refrigerant cycle. Refer to Inspection.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace malfunctioning parts.

CHECK AIR CONDITIONING SYSTEM BY RE-FILLING REFRIGERANT

  1. Collect refrigerant, and charge the air conditioning system from a new service can with the specified amount refrigerant. Refer to Charge Refrigerant.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate air conditioning system 15 minutes or more.

  4. Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Replace electric compressor. Refer to Removal & Installation.

NO>>

INSPECTION END

B24ef-97 Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24EF–97 Compressor input high voltage error 1 Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold When it becomes impossible to control the electric compressor due to the voltage drop of the high voltage system
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Electric compressor

  • Cooling fan

  • Overfilled refrigerant

  • Refrigerant cycle unusual

  • Li-ion battery

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK LI-ION BATTERY

Check li-ion battery. Refer to Work Flow.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning parts.

CHECK REFRIGERANT FOR LEAKAGES

Check refrigerant for leakages. Refer to Leak Test.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace malfunctioning parts.

CHECK COOLING FAN OPERATION

  1. Set the Nissan Ariya vehicle to READY.

  2. Operation the air conditioning system.

  3. Check the cooling fan rotates normally.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Check cooling fan. Refer to Component Function Check.

CHECK REFRIGERANT CYCLE

Check refrigerant cycle. Refer to Inspection.

Is the inspection result normal?

YES>>

Replace electric compressor. Refer to Removal & Installation.

NO>>

Repair or replace malfunctioning parts.

B24f4-12 Heated Steering Wheel Relay

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B24F4-12 Heated steering wheel relay Diagnosis condition Power switch ON
Signal (Terminal) Heated steering wheel relay control circuit
Threshold Heated steering wheel relay control circuit is shorted to battery
Diagnosis delay time 1 second or more

POSSIBLE CAUSE

  • Steering heater relay

  • A/C auto amp.

  • Harness or connectors (heated steering wheel relay control circuit is shorted to battery)

FAIL-SAFE

Heated steering wheel operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK STEERING HEATER RELAY CONTROL SIGNAL CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Remove steering heater relay and disconnect A/C auto amp. connector.

  3. Check voltage between A/C auto amp. harness connector and ground.

    + -

    Voltage

    (Approx.)
    A/C auto amp.
    Connector Terminal
    M1 56 Ground 0 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair harness or connector.

CHECK STEERING HEATER RELAY

Check steering heater relay. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Replace steering heater relay.

Component Inspection

CHECK STEERING HEATER RELAY

  1. Power switch OFF.

  2. Remove steering heater relay.

  3. Check continuity between steering heater relay terminals.

    Terminal Condition Continuity
    Steering heater relay
    12 V direct current supply between terminals and . Existed
    No current supply Not existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace steering heater relay.

B24fc-11 Ptc Heater Outlet Air Temperature Sensor Rh

DTC Description

DTC DETECTION LOGIC

NOTE:

“Blower motor assembly (rear right side)” is indicated on CONSULT display, however this means PTC heater outlet air temperature sensor (passenger side) on this model.

DTC No. CONSULT screen terms DTC detection condition
B24FC-11 Blower motor assembly (rear right side) Diagnosis condition Nissan Ariya Vehicle to READY
Signal (Terminal) PTC heater outlet air temperature sensor RH signal
Threshold The PTC heater outlet air temperature sensor (passenger side) recognition temperature is too high [more than 200°C (392°F)]
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • PTC heater outlet air temperature sensor (passenger side)

  • A/C auto amp.

  • Harness or connectors [PTC heater outlet air temperature sensor (passenger side) circuit is shorted to ground]

FAIL-SAFE

PTC heater operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (PASSENGER SIDE) SIGNAL

  1. Power switch ON.

  2. Check voltage between A/C auto amp. harness connector.

    + - Voltage
    A/C auto amp.
    Connector Terminal Connector Terminal
    M2 24 M1 78

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (PASSENGER SIDE) POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect PTC heater outlet air temperature sensor RH connector.

  3. Power switch ON.

  4. Check voltage between PTC heater outlet air temperature sensor RH harness connector and ground.

    + -

    Voltage

    (Approx.)
    PTC heater outlet air temperature sensor RH
    Connector Terminal
    M901 5 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (PASSENGER SIDE)

Check PTC heater outlet air temperature sensor RH. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Replace PTC heater outlet air temperature sensor RH. Refer to Removal & Installation.

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR (PASSENGER SIDE) POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between PTC heater outlet air temperature sensor RH harness connector and ground.

    PTC heater outlet air temperature sensor RH — Continuity
    Connector Terminal
    M901 5 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK PTC HEATER OUTLET AIR TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove PTC heater outlet air temperature sensor. Refer to Removal & Installation.

  3. Check resistance between PTC heater outlet air temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.91
    −10 (14) 9.59
    0 (32) 6.00
    10 (50) 3.88
    20 (68) 2.58
    25 (77) 2.13
    30 (86) 1.77
    40 (104) 1.24

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace PTC heater outlet air temperature sensor. Refer to Removal & Installation.

U1000-01 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1000-01 Control area network communication circuit Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U1010-49 Control Unit (can)

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1010-49 CONTROL UNIT (CAN) Diagnosis condition Power switch ON
Signal (Terminal) —
Threshold Detecting error during the initial diagnosis of CAN controller of A/C auto amp.
Diagnosis delay time 1 seconds or more

POSSIBLE CAUSE

A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE A/C AUTO AMP.

Replace A/C auto amp. Refer to Removal & Installation.

>>

INSPECTION END

U1ca2-08 Door Motor Communication

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1CA2-08 Local interconnect network communication 3 Diagnosis condition Power switch ON
Signal (Terminal) LIN (door motor) signal
Threshold A/C auto amp. is not transmitting or receiving LIN communication with each door motor
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector (door motor circuit is open or shorted to ground)

  • Each door motor

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

  3. Check following DTC.

    DTC

    Items

    (CONSULT screen terms)     		Reference
    U1CAA-02 Mode door motor 1 LIN communication DTC Description
    U1CAB-02 Intake door motor LIN communication DTC Description
    U1CAC-02 Air mix door motor 1 LIN communication DTC Description
    U1CAD-02 Air mix door motor 2 LIN communication DTC Description
    U1CAE-02 Rear air mix door motor communication DTC Description
    U1CB6-02 Rear mode door motor LIN communication DTC Description

Is DTC detected?

YES>>

Perform DTC diagnosis procedure that is detecting.

NO>>

Replace A/C auto amp. Refer to Removal & Installation.

U1ca3-08 Lin Communication

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1CA3-08 Local interconnect network communication 4 Diagnosis condition Power switch ON
Signal (Terminal) LIN (heated seat and humidity sensor) signal
Threshold A/C auto amp. is not transmitting or receiving LIN communication with heated seat and humidity sensor
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector (heated seat and humidity sensor circuit is open or shorted to ground)

  • Heated seat

  • Humidity sensor

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK DTC

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

  3. Check following DTC.

    DTC

    Items

    (CONSULT screen terms)     		Reference
    U1CA6-02 Front seat heater RH communication DTC Description
    U1CA7-02 Front seat heater LH communication DTC Description
    U1CA8-02 Rear seat heater RH communication DTC Description
    U1CA9-02 Rear seat heater LH communication DTC Description
    U1CB4-02 Humidity sensor communication DTC Description

Is DTC detected?

YES>>

Perform DTC diagnosis procedure that is detecting.

NO>>

Replace A/C auto amp. Refer to Removal & Installation.

U1caa-02 Front Mode Door Motor Lh

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1CAA-02 Mode door motor 1 LIN communication Diagnosis condition Power switch ON
Signal (Terminal) LIN (door motor) signal
Threshold A/C auto amp. is not transmitting or receiving LIN communication with front mode door motor (driver side)
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector [front mode door motor (driver side) circuit is open or shorted to ground]

  • Front mode door motor (driver side)

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Removal & Installation.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK FRONT MODE DOOR MOTOR (DRIVER SIDE) POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between front mode door motor LH harness connector and A/C auto amp. harness connector.

+ - Voltage
Front mode door motor LH A/C auto amp.
Connector Terminal Connector Terminal
M907 1 M1 58 10.5 – 16 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 4.

CHECK FRONT MODE DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect front mode door motor LH connector and A/C auto amp. connector.

  3. Check continuity between front mode door motor LH harness connector and A/C auto amp. harness connector.

    Front mode door motor LH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M907 2 M2 27 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK FRONT MODE DOOR MOTOR (DRIVER SIDE) LIN SIGNAL CIRCUIT

  1. Connect front mode door motor LH connector and A/C auto amp. connector.

  2. Power switch ON.

  3. Confirm output waveform between front mode door motor LH harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    Front mode door motor LH A/C auto amp.
    Connector Terminal Connector Terminal
    M907 3 M1 58

Is the inspection result normal?

YES>>

Replace front mode door motor LH. Refer to Removal & Installation.

NO>>

GO TO 6.

CHECK FRONT MODE DOOR MOTOR (DRIVER SIDE) POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect front mode door motor LH connector and A/C auto amp. connector.

  3. Check continuity between front mode door motor LH harness connector and A/C auto amp. harness connector.

    Front mode door motor LH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M907 1 M2 21 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK FRONT MODE DOOR MOTOR (DRIVER SIDE) POWER SUPPLY CIRCUIT FOR SHORT

  1. Disconnect front mode door motor RH connector and intake door motor connector.

  2. Check continuity between front mode door motor LH harness connector and ground.

    Front mode door motor LH — Continuity
    Connector Terminal
    M907 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

CHECK FRONT MODE DOOR MOTOR (DRIVER SIDE) LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect front mode door motor LH connector and A/C auto amp. connector.

  3. Check continuity between front mode door motor LH harness connector and A/C auto amp. harness connector.

    Front mode door motor LH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M907 3 M2 2 Existed

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair harness or connector.

CHECK FRONT MODE DOOR MOTOR (DRIVER SIDE) LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Air mix door motor LH

    • Front mode door motor RH

    • Air mix door motor RH

    • Intake door motor

    • Rear mode door motor

  2. Check continuity between front mode door motor LH harness connector and ground.

    Front mode door motor LH — Continuity
    Connector Terminal
    M907 3 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

U1cab-02 Intake Door Motor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1CAB-02 Intake door motor LIN communication Diagnosis condition Power switch ON
Signal (Terminal) LIN (door motor) signal
Threshold A/C auto amp. is not transmitting or receiving LIN communication with intake door motor
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector (intake door motor circuit is open or shorted to ground)

  • Intake door motor

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK INTAKE DOOR MOTOR POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between intake door motor harness connector and A/C auto amp. harness connector.

+ - Voltage
Intake door motor A/C auto amp.
Connector Terminal Connector Terminal
M908 1 M1 58 10.5 – 16 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 4.

CHECK INTAKE DOOR MOTOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect intake door motor connector and A/C auto amp. connector.

  3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

    Intake door motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M908 2 M2 27 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK INTAKE DOOR MOTOR LIN SIGNAL CIRCUIT

  1. Connect intake door motor connector and A/C auto amp. connector.

  2. Power switch ON.

  3. Confirm output waveform between intake door motor harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    Intake door motor A/C auto amp.
    Connector Terminal Connector Terminal
    M908 3 M1 58

Is the inspection result normal?

YES>>

Replace intake door motor. Refer to Removal & Installation.

NO>>

GO TO 6.

CHECK INTAKE DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect intake door motor connector and A/C auto amp. connector.

  3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

    Intake door motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M908 1 M2 21 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK INTAKE DOOR MOTOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Disconnect front mode door motor LH and front mode door motor RH.

  2. Check continuity between intake door motor harness connector and ground.

    Intake door motor — Continuity
    Connector Terminal
    M908 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

CHECK INTAKE DOOR MOTOR LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect intake door motor connector and A/C auto amp. connector.

  3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

    Intake door motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M908 3 M2 2 Existed

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair harness or connector.

CHECK INTAKE DOOR MOTOR LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Air mix door motor LH

    • Air mix door motor RH

    • Front mode door motor LH

    • Front mode door motor RH

    • Rear mode door motor

  2. Check continuity between intake door motor harness connector and ground.

    Intake door motor — Continuity
    Connector Terminal
    M908 3 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

U1cac-02 Air Mix Door Motor Lh

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1CAC-02 Air mix door motor 1 LIN communication Diagnosis condition Power switch ON
Signal (Terminal) LIN (door motor) signal
Threshold A/C auto amp. is not transmitting or receiving LIN communication with air mix door motor (driver side)
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector [air mix door motor (driver side) circuit is open or shorted to ground]

  • Front air mix door motor (driver side)

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between air mix door motor LH harness connector and A/C auto amp. harness connector.

+ - Voltage
Air mix door motor LH A/C auto amp.
Connector Terminal Connector Terminal
M322 1 M1 58 10.5 – 16 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 4.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect air mix door motor LH connector and A/C auto amp. connector.

  3. Check continuity between air mix door motor LH harness connector and A/C auto amp. harness connector.

    Air mix door motor LH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M322 2 M2 27 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) LIN SIGNAL CIRCUIT

  1. Connect air mix door motor LH connector and A/C auto amp. connector.

  2. Power switch ON.

  3. Confirm output waveform between air mix door motor LH harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    Air mix door motor LH A/C auto amp.
    Connector Terminal Connector Terminal
    M322 3 M1 58

Is the inspection result normal?

YES>>

Replace air mix door motor LH. Refer to Removal & Installation.

NO>>

GO TO 6.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect air mix door motor LH connector and A/C auto amp. connector.

  3. Check continuity between air mix door motor LH harness connector and A/C auto amp. harness connector.

    Air mix door motor LH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M322 1 M2 1 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) POWER SUPPLY CIRCUIT FOR SHORT

  1. Disconnect air mix door motor RH connector and rear mode door motor connector.

  2. Check continuity between air mix door motor LH harness connector and ground.

    Air mix door motor LH — Continuity
    Connector Terminal
    M322 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect air mix door motor LH connector and A/C auto amp. connector.

  3. Check continuity between air mix door motor LH harness connector and A/C auto amp. harness connector.

    Air mix door motor LH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M322 3 M2 2 Existed

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair harness or connector.

CHECK AIR MIX DOOR MOTOR (DRIVER SIDE) LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Air mix door motor RH

    • Front mode door motor LH

    • Front mode door motor RH

    • Intake door motor

    • Rear mode door motor

  2. Check continuity between air mix door motor LH harness connector and ground.

    Air mix door motor LH — Continuity
    Connector Terminal
    M322 3 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

U1cad-02 Air Mix Door Motor Rh

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1CAD-02 Air mix door motor 2 LIN communication Diagnosis condition Power switch ON
Signal (Terminal) LIN (door motor) signal
Threshold A/C auto amp. is not transmitting or receiving LIN communication with air mix door motor (passenger side)
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector [air mix door motor (passenger side) circuit is open or shorted to ground]

  • Air mix door motor (passenger side)

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between air mix door motor RH harness connector and A/C auto amp. harness connector.

+ - Voltage
Air mix door motor RH A/C auto amp.
Connector Terminal Connector Terminal
M321 1 M1 58 10.5 – 16 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 4.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect air mix door motor RH connector and A/C auto amp. connector.

  3. Check continuity between air mix door motor RH harness connector and A/C auto amp. harness connector.

    Air mix door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M321 2 M2 27 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) LIN SIGNAL CIRCUIT

  1. Connect air mix door motor RH connector and A/C auto amp. connector.

  2. Power switch ON.

  3. Confirm output waveform between air mix door motor RH harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    Air mix door motor RH A/C auto amp.
    Connector Terminal Connector Terminal
    M321 3 M1 58

Is the inspection result normal?

YES>>

Replace air mix door motor RH. Refer to Removal & Installation.

NO>>

GO TO 6.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect air mix door motor RH connector and A/C auto amp. connector.

  3. Check continuity between air mix door motor RH harness connector and A/C auto amp. harness connector.

    Air mix door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M321 1 M2 1 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY CIRCUIT FOR SHORT

  1. Disconnect air mix door motor LH connector and rear mode door motor connector.

  2. Check continuity between air mix door motor RH harness connector and ground.

    Air mix door motor RH — Continuity
    Connector Terminal
    M321 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect air mix door motor RH connector and A/C auto amp. connector.

  3. Check continuity between air mix door motor RH harness connector and A/C auto amp. harness connector.

    Air mix door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M321 3 M2 2 Existed

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair harness or connector.

CHECK AIR MIX DOOR MOTOR (PASSENGER SIDE) LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Air mix door motor LH

    • Front mode door motor LH

    • Front mode door motor RH

    • Intake door motor

    • Rear mode door motor

  2. Check continuity between air mix door motor RH harness connector and ground.

    Air mix door motor RH — Continuity
    Connector Terminal
    M321 3 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

U1cae-02 Front Mode Door Motor Rh

DTC Description

DTC DETECTION LOGIC

NOTE:

“Rear air mix door motor communication” is indicated on CONSULT display, however this means front mode door motor (passenger side) on this model.

DTC No. CONSULT screen terms DTC detection condition
U1CAE-02 Rear air mix door motor communication Diagnosis condition Power switch ON
Signal (Terminal) LIN (door motor) signal
Threshold A/C auto amp. is not transmitting or receiving LIN communication with front mode door motor (passenger side)
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector [front mode door motor (passenger side) circuit is open or shorted to ground]

  • Front mode door motor (passenger side)

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between front mode door motor RH harness connector and A/C auto amp. harness connector.

+ - Voltage
Front mode door motor RH A/C auto amp.
Connector Terminal Connector Terminal
M906 1 M1 58 10.5 – 16 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 4.

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect front mode door motor RH connector and A/C auto amp. connector.

  3. Check continuity between front mode door motor RH harness connector and A/C auto amp. harness connector.

    Front ode door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M906 2 M2 27 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) LIN SIGNAL CIRCUIT

  1. Connect front mode door motor RH connector and A/C auto amp. connector.

  2. Power switch ON.

  3. Confirm output waveform between front mode door motor RH harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    Front mode door motor RH A/C auto amp.
    Connector Terminal Connector Terminal
    M906 3 M1 58

Is the inspection result normal?

YES>>

Replace front mode door motor RH. Refer to Removal & Installation.

NO>>

GO TO 6.

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect front mode door motor RH connector and A/C auto amp. connector.

  3. Check continuity between front mode door motor RH harness connector and A/C auto amp. harness connector.

    Front mode door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M906 1 M2 21 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) POWER SUPPLY CIRCUIT FOR SHORT

  1. Disconnect front mode door motor LH connector and intake door motor connector.

  2. Check continuity between front mode door motor RH harness connector and ground.

    Front mode door motor RH — Continuity
    Connector Terminal
    M906 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

CHECK FRONT MODE DOOR MOTOR (PASSENGER SIDE) LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect front mode door motor RH connector and A/C auto amp. connector.

  3. Check continuity between front mode door motor RH harness connector and A/C auto amp. harness connector.

    Front mode door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M906 3 M2 2 Existed

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair harness or connector.

CHECK MODE DOOR MOTOR LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Air mix door motor LH

    • Air mix door motor RH

    • Front mode door motor LH

    • Intake door motor

    • Rear mode door motor

  2. Check continuity between front mode door motor RH harness connector and ground.

    Front mode door motor RH — Continuity
    Connector Terminal
    M906 3 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

U1cb0-02 Battery Coolant Heater

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1CB0–02 Battery coolant heater LIN communication error Diagnosis condition Power switch ON
Signal (terminal) LIN (battery coolant heater) signal
Threshold Detects abnormalities in the signal transmitted from the battery coolant heater
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Battery coolant heater

  • A/C auto amp.

  • Harness or connectors (battery coolant heater communication circuit is open or shorted)

  • Li-ion battery (battery coolant heater system)

FAIL-SAFE

Battery coolant heater operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK BATTERY COOLANT HEATER LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect li-ion battery and A/C auto amp. connector.

  3. Check continuity between li-ion battery harness connector and A/C auto amp. harness connector.

    Li-ion battery A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    E9 30 M1 52 Existed

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair harness or connector.

CHECK BATTERY COOLANT HEATER LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Heat pump control unit

    • PTC heater

    • Electric compressor

  2. Check continuity between li-ion battery harness connector and ground.

    Li-ion battery — Continuity
    Connector Terminal
    E9 30 Ground Not existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK LI-ION BATTERY POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between li-ion battery harness connector and ground.

    + - Voltage
    Li-ion battery
    Connector Terminal
    E9 17 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace li-ion battery 12 V power supply circuit.

CHECK LI-ION BATTERY GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Check continuity between li-ion battery harness connector and ground.

Li-ion battery — Continuity
Connector Terminal
E9 27 Ground Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK A/C AUTO AMP.

  1. Reconnect all harness connectors disconnected.

  2. Set the Nissan Ariya vehicle to READY.

  3. Check that the battery coolant heater operates normally in each mode.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Replace A/C auto amp. (refer to Removal & Installation.). Then GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Check battery coolant heater. Refer to Diagnosis Procedure.

NO>>

INSPECTION END

U1cb4-02 Humidity Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1CB4-02 Humidity sensor communication Diagnosis condition Power switch ON
Signal (Terminal) LIN (humidity sensor) signal
Threshold A/C auto amp. is not transmitting or receiving LIN communication with humidity sensor
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector (humidity sensor circuit is open or shorted to ground)

  • Humidity sensor

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK HUMIDITY SENSOR POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between humidity sensor harness connector and ground.

+ - Voltage
Humidity sensor
Connector Terminal
R21 4 Ground 10.5 – 16 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair the humidity sensor power supply circuit.

CHECK HUMIDITY SENSOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect humidity sensor connector.

  3. Check continuity between humidity sensor harness connector and ground.

    Humidity sensor — Continuity
    Connector Terminal
    R21 2 Ground Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK HUMIDITY SENSOR LIN SIGNAL CIRCUIT

  1. Connect humidity sensor connector.

  2. Power switch ON.

  3. Confirm output waveform between humidity sensor harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    Humidity sensor A/C auto amp.
    Connector Terminal Connector Terminal
    R21 1 M1 58

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

GO TO 4.

CHECK HUMIDITY SENSOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect humidity sensor connector and A/C auto amp. connector.

  3. Check continuity between humidity sensor harness connector and A/C auto amp. harness connector.

    Humidity sensor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    R21 1 M1 45 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK HUMIDITY SENSOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Front seat heater LH

    • Front seat heater RH

    • Rear seat heater LH

    • Rear seat heater RH

  2. Check continuity between humidity sensor harness connector and ground.

    Humidity sensor — Continuity
    Connector Terminal
    R21 1 Ground Not existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

REPLACE HUMIDITY SENSOR

  1. Replace humidity sensor. Refer to Removal & Installation.

  2. Perform DTC confirmation procedure. Refer to DTC Description.

Is the DTC detected?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

INSPECTION END

U1cb6-02 Rear Mode Door Motor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1CB6-02 Rear mode door motor LIN communication Diagnosis condition Power switch ON
Signal (Terminal) LIN (door motor) signal
Threshold A/C auto amp. is not transmitting or receiving LIN communication with rear mode door motor
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Harness and connector (rear mode door motor circuit is open or shorted to ground)

  • Rear mode door motor

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Set the Nissan Ariya vehicle to READY.

  2. Select “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK REAR MODE DOOR MOTOR POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between rear mode door motor harness connector and A/C auto amp. harness connector.

+ - Voltage
Rear mode door motor A/C auto amp.
Connector Terminal Connector Terminal
M117 1 M1 58 10.5 – 16 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

GO TO 4.

CHECK REAR MODE DOOR MOTOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect rear mode door motor connector and A/C auto amp. connector.

  3. Check continuity between rear mode door motor harness connector and A/C auto amp. harness connector.

    Rear mode door motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M117 2 M2 27 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK REAR MODE DOOR MOTOR LIN SIGNAL CIRCUIT

  1. Connect rear mode door motor connector and A/C auto amp. connector.

  2. Power switch ON.

  3. Confirm output waveform between rear mode door motor harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    Rear mode door motor A/C auto amp.
    Connector Terminal Connector Terminal
    M117 3 M1 58

Is the inspection result normal?

YES>>

Replace rear mode door motor. Refer to Removal & Installation.

NO>>

GO TO 6.

CHECK REAR MODE DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect rear mode door motor connector and A/C auto amp. connector.

  3. Check continuity between rear mode door motor harness connector and A/C auto amp. harness connector.

    Rear mode door motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M117 1 M2 1 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK REAR MODE DOOR MOTOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Disconnect air mix door motor LH connector and air mix door motor RH connector.

  2. Check continuity between rear mode door motor harness connector and ground.

    Rear mode door motor — Continuity
    Connector Terminal
    M117 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

CHECK REAR MODE DOOR MOTOR LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect rear mode door motor connector and A/C auto amp. connector.

  3. Check continuity between rear mode door motor harness connector and A/C auto amp. harness connector.

    Rear mode door motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M117 3 M2 2 Existed

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair harness or connector.

CHECK REAR MODE DOOR MOTOR LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Air mix door motor LH

    • Air mix door motor RH

    • Front mode door motor LH

    • Front mode door motor RH

    • Intake door motor

  2. Check continuity between rear mode door motor harness connector and ground.

    Rear mode door motor — Continuity
    Connector Terminal
    M117 3 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

U2143-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Ariya vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Ariya vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen items DTC Detection Condition
U2143–87 CAN communication error (VCM/HCM) Diagnosis condition Power switch ON
Signal (terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Perform “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U2148-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U2148-87 CAN communication error (brake control unit) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U214e-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U214E-87 CAN communication error (combination meter) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U214f-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U214F-87 CAN communication error (BCM) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U2150-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U2150-87 CAN communication error (AIRBAG) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U2152-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U2152-87 CAN communication error advanced driver assistant systems control unit Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U2154-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Ariya vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Ariya vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen items DTC Detection Condition
U2154–87 CAN communication error (MIU) Diagnosis condition Power switch ON
Signal (terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Perform “Self Diagnostic Result” mode of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Trouble Diagnosis Flow Chart.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U215b-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U215B-87 CAN communication error (IPDM E/R) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U216b-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U216B-87 CAN communication error front camera Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U2176-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U2176-87 CAN communication error (chassis control module/steering angle sensor) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U21a0-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U21A0-87 CAN communication error (HVAC) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold A/C auto amp. is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HVAC” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

B2440-11 Evaporator Discharge Refrigerant Temperature Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2440-11 Evaporator discharge refrigerant temperature sensor Diagnosis condition Power switch ON
Signal (Terminal) Evaporator discharge refrigerant temperature sensor signal
Threshold The evaporator discharge refrigerant temperature sensor recognition temperature is too high [more than 162°C (323°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Evaporator discharge refrigerant temperature sensor

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is shorted to ground)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    Heat pump control unit Voltage
    Connector Terminal
    + -
    M913 11 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect evaporator discharge refrigerant temperature sensor connector.

  3. Power switch ON.

  4. Check voltage between evaporator discharge refrigerant temperature sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Evaporator discharge refrigerant temperature sensor
    Connector Terminal
    B104 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR

Check evaporator discharge refrigerant temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace evaporator discharge refrigerant temperature sensor. Refer to Removal & Installation.

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between evaporator discharge refrigerant temperature sensor harness connector and ground.

    Evaporator discharge refrigerant temperature sensor — Continuity
    Connector Terminal
    B104 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove evaporator discharge refrigerant temperature sensor. Refer to Removal & Installation.

  3. Check resistance between evaporator discharge refrigerant temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.86
    −10 (14) 9.58
    0 (32) 6.00
    10 (50) 3.89
    20 (68) 2.59
    25 (77) 2.14
    30 (86) 1.78
    40 (104) 1.25

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace evaporator discharge refrigerant temperature sensor. Refer to Removal & Installation.

B2440-15 Evaporator Discharge Refrigerant Temperature Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2440-15 Evaporator discharge refrigerant temperature sensor Diagnosis condition Power switch ON
Signal (Terminal) Evaporator discharge refrigerant temperature sensor signal
Threshold The evaporator discharge refrigerant temperature sensor recognition temperature is too low [less than -60°C (-76°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Evaporator discharge refrigerant temperature sensor

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is open or shorted to battery)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    Heat pump control unit Voltage
    Connector Terminal
    + -
    M913 11 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect evaporator discharge refrigerant temperature sensor connector.

  3. Power switch ON.

  4. Check voltage between evaporator discharge refrigerant temperature sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Evaporator discharge refrigerant temperature sensor
    Connector Terminal
    B104 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 5.

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between evaporator discharge refrigerant temperature sensor harness connector and heat pump control unit harness connector.

    Evaporator discharge refrigerant temperature sensor Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    B104 2 M913 27 Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR

Check evaporator discharge refrigerant temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace evaporator discharge refrigerant temperature sensor. Refer to Removal & Installation.

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between evaporator discharge refrigerant temperature sensor harness connector and heat pump control unit harness connector.

    Evaporator discharge refrigerant temperature sensor Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    B104 1 M913 11 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check voltage between evaporator discharge refrigerant temperature sensor harness connector and ground.

+ -

Voltage

(Approx.)
Evaporator discharge refrigerant temperature sensor
Connector Terminal
B104 1 Ground 0 V

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK EVAPORATOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove evaporator discharge refrigerant temperature sensor. Refer to Removal & Installation.

  3. Check resistance between evaporator discharge refrigerant temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.86
    −10 (14) 9.58
    0 (32) 6.00
    10 (50) 3.89
    20 (68) 2.59
    25 (77) 2.14
    30 (86) 1.78
    40 (104) 1.25

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace evaporator discharge refrigerant temperature sensor. Refer to Removal & Installation.

B2441-11 Condenser Discharge Refrigerant Temperature Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2441-11 Condenser discharge refrigerant temperature sensor Diagnosis condition Power switch ON
Signal (Terminal) Condenser discharge refrigerant temperature sensor signal
Threshold The condenser discharge refrigerant temperature sensor recognition temperature is too high [more than 143°C (289°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Condenser discharge refrigerant temperature sensor

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is shorted to ground)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    Heat pump control unit Voltage
    Connector Terminal
    + -
    M913 10 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect condenser discharge refrigerant temperature sensor connector.

  3. Power switch ON.

  4. Check voltage between condenser discharge refrigerant temperature sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Condenser discharge refrigerant temperature sensor
    Connector Terminal
    B53 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR

Check condenser discharge refrigerant temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between condenser discharge refrigerant temperature sensor harness connector and ground.

    Condenser discharge refrigerant temperature sensor — Continuity
    Connector Terminal
    B53 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

  3. Check resistance between condenser discharge refrigerant temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.86
    −10 (14) 9.58
    0 (32) 6.00
    10 (50) 3.89
    20 (68) 2.59
    25 (77) 2.14
    30 (86) 1.78
    40 (104) 1.25

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

B2441-15 Condenser Discharge Refrigerant Temperature Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2441-15 Condenser discharge refrigerant temperature sensor Diagnosis condition Power switch ON
Signal (Terminal) Condenser discharge refrigerant temperature sensor signal
Threshold The condenser discharge refrigerant temperature sensor recognition temperature is too low [less than -64°C (-147°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Condenser discharge refrigerant temperature sensor

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is open or shorted to battery)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    Heat pump control unit Voltage
    Connector Terminal
    + -
    M913 10 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect condenser discharge refrigerant temperature sensor connector.

  3. Power switch ON.

  4. Check voltage between condenser discharge refrigerant temperature sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Condenser discharge refrigerant temperature sensor
    Connector Terminal
    B53 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 5.

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between condenser discharge refrigerant temperature sensor harness connector and heat pump control unit harness connector.

    Condenser discharge refrigerant temperature sensor Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    B53 2 M913 27 Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR

Check condenser discharge refrigerant temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between condenser discharge refrigerant temperature sensor harness connector and heat pump control unit harness connector.

    Condenser discharge refrigerant temperature sensor Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    B53 1 M913 27 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check voltage between condenser discharge refrigerant temperature sensor harness connector and ground.

+ -

Voltage

(Approx.)
Condenser discharge refrigerant temperature sensor
Connector Terminal
B53 1 Ground 0 V

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

  3. Check resistance between condenser discharge refrigerant temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.86
    −10 (14) 9.58
    0 (32) 6.00
    10 (50) 3.89
    20 (68) 2.59
    25 (77) 2.14
    30 (86) 1.78
    40 (104) 1.25

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

B2442-11 Compressor Discharge Refrigerant Temperature Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2442-11 Compressor discharge refrigerant temperature sensor Diagnosis condition Power switch ON
Signal (Terminal) Compressor discharge refrigerant temperature sensor signal
Threshold The compressor discharge refrigerant temperature sensor recognition temperature is too high [more than 283°C (541°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Compressor discharge refrigerant temperature sensor

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is shorted to ground)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    Heat pump control unit Voltage
    Connector Terminal
    + -
    M913 8 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect compressor discharge refrigerant temperature sensor connector.

  3. Power switch ON.

  4. Check voltage between compressor discharge refrigerant temperature sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Compressor discharge refrigerant temperature sensor
    Connector Terminal
    M320 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR

Check compressor discharge refrigerant temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace compressor discharge refrigerant temperature sensor. Refer to Removal & Installation.

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between compressor discharge refrigerant temperature sensor harness connector and ground.

    Compressor discharge refrigerant temperature sensor — Continuity
    Connector Terminal
    M320 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove compressor discharge refrigerant temperature sensor. Refer to Removal & Installation.

  3. Check resistance between compressor discharge refrigerant temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 0 (32) 317.5
    10 (50) 192.8
    20 (68) 120.4
    25 (77) 77.1
    30 (86) 50.7
    40 (104) 23.4
    80 (176) 8.4
    100 (212) 6.2

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace compressor discharge refrigerant temperature sensor. Refer to Removal & Installation.

B2442-15 Compressor Discharge Refrigerant Temperature Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2442-15 Compressor discharge refrigerant temperature sensor Diagnosis condition Power switch ON
Signal (Terminal) Compressor discharge refrigerant temperature sensor signal
Threshold The compressor discharge refrigerant temperature sensor recognition temperature is too low [less than -68°C (-154°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Compressor discharge refrigerant temperature sensor

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is open or shorted to battery)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    Heat pump control unit Voltage
    Connector Terminal
    + -
    M913 8 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect compressor discharge refrigerant temperature sensor connector.

  3. Power switch ON.

  4. Check voltage between compressor discharge refrigerant temperature sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Compressor discharge refrigerant temperature sensor
    Connector Terminal
    M320 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 5.

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between compressor discharge refrigerant temperature sensor harness connector and heat pump control unit harness connector.

    Compressor discharge refrigerant temperature sensor Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    M320 2 M913 27 Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR

Check compressor discharge refrigerant temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace compressor discharge refrigerant temperature sensor. Refer to Removal & Installation.

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between compressor discharge refrigerant temperature sensor harness connector and heat pump control unit harness connector.

    Compressor discharge refrigerant temperature sensor Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    M320 1 M913 8 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check voltage between compressor discharge refrigerant temperature sensor harness connector and ground.

+ -

Voltage

(Approx.)
Compressor discharge refrigerant temperature sensor
Connector Terminal
M320 1 Ground 0 V

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK COMPRESSOR DISCHARGE REFRIGERANT TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove compressor discharge refrigerant temperature sensor. Refer to Removal & Installation.

  3. Check resistance between compressor discharge refrigerant temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 0 (32) 317.5
    10 (50) 192.8
    20 (68) 120.4
    25 (77) 77.1
    30 (86) 50.7
    40 (104) 23.4
    80 (176) 8.4
    100 (212) 6.2

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace compressor discharge refrigerant temperature sensor. Refer to Removal & Installation.

B2443-11 Inner Condenser Discharge Refrigerant Temperature Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2443-11 Inner condenser discharge refrigerant temperature sensor Diagnosis condition Power switch ON
Signal (Terminal) Inner condenser discharge refrigerant temperature sensor signal
Threshold The inner condenser discharge refrigerant temperature sensor recognition temperature is too high [more than 222°C (431°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Inner condenser discharge refrigerant temperature sensor

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is shorted to ground)

FAIL-SAFE

Operate only cooler

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    Heat pump control unit Voltage
    Connector Terminal
    + -
    M913 9 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect inner condenser discharge refrigerant temperature sensor connector.

  3. Power switch ON.

  4. Check voltage between inner condenser discharge refrigerant temperature sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Inner condenser discharge refrigerant temperature sensor
    Connector Terminal
    M319 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR

Check inner condenser discharge refrigerant temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace inner condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between inner condenser discharge refrigerant temperature sensor harness connector and ground.

    Inner condenser discharge refrigerant temperature sensor — Continuity
    Connector Terminal
    M319 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove inner condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

  3. Check resistance between inner condenser discharge refrigerant temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 0 (32) 317.5
    10 (50) 192.8
    20 (68) 120.4
    25 (77) 77.1
    30 (86) 50.7
    40 (104) 23.4
    80 (176) 8.4
    100 (212) 6.2

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace inner condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

B2443-15 Inner Condenser Discharge Refrigerant Temperature Sensor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2443-15 Inner condenser discharge refrigerant temperature sensor Diagnosis condition Power switch ON
Signal (Terminal) Inner condenser discharge refrigerant temperature sensor signal
Threshold The Inner condenser discharge refrigerant temperature sensor recognition temperature is too low [less than -69°C (-156°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Inner condenser discharge refrigerant temperature sensor

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is open or shorted to battery)

FAIL-SAFE

Operate only cooler

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    Heat pump control unit Voltage
    Connector Terminal
    + -
    M913 9 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect inner condenser discharge refrigerant temperature sensor connector.

  3. Power switch ON.

  4. Check voltage between inner condenser discharge refrigerant temperature sensor harness connector and ground.

    + -

    Voltage

    (Approx.)
    Inner condenser discharge refrigerant temperature sensor
    Connector Terminal
    M319 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 5.

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between inner condenser discharge refrigerant temperature sensor harness connector and heat pump control unit harness connector.

    Inner condenser discharge refrigerant temperature sensor Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    M319 2 M913 27 Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR

Check inner condenser discharge refrigerant temperature sensor. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace inner condenser discharge refrigerant temperature sensor. Refer to Component Inspection.

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between inner condenser discharge refrigerant temperature sensor harness connector and heat pump control unit harness connector.

    Inner condenser discharge refrigerant temperature sensor Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    M319 1 M913 9 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair harness or connector.

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT

Check voltage between inner condenser discharge refrigerant temperature sensor harness connector and ground.

+ -

Voltage

(Approx.)
Inner condenser discharge refrigerant temperature sensor
Connector Terminal
M319 1 Ground 0 V

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK INNER CONDENSER DISCHARGE REFRIGERANT TEMPERATURE SENSOR

  1. Power switch OFF.

  2. Remove inner condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

  3. Check resistance between inner condenser discharge refrigerant temperature sensor harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 0 (32) 317.5
    10 (50) 192.8
    20 (68) 120.4
    25 (77) 77.1
    30 (86) 50.7
    40 (104) 23.4
    80 (176) 8.4
    100 (212) 6.2

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace inner condenser discharge refrigerant temperature sensor. Refer to Removal & Installation.

B2446-23 Refrigerant Leak

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2446–23 Refrigerant gas leak Diagnosis condition Power switch ON
Signal (terminal) —
Threshold Refrigerant is leaking or not in
Diagnosis delay time —

POSSIBLE CAUSE

  • Refrigerant is leaking or not in

  • Refrigerant pressure sensor

  • VCM

  • Harness or connectors (refrigerant pressure sensor and VCM circuit is open or shorted)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK REFRIGERANT PRESSURE SENSOR SYSTEM

Check refrigerant pressure sensor system. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace malfunctioning part.

CHECK REFRIGERANT LEAK

Check refrigerant leak. Refer to Leak Test.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair or replace malfunctioning part.

P1c00-44 Heat Pump Control Unit

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C00–44 Heat pump control unit Diagnosis condition Power switch ON
Signal (terminal) —
Threshold When the data error in the RAM area of ECU is detected
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

Heat pump control unit

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE HEAT PUMP CONTROL UNIT

Replace heat pump control unit. Refer to Removal & Installation.

>>

INSPECTION END

P1c00-46 Heat Pump Control Unit

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C00–46 Heat pump control unit Diagnosis condition Power switch ON
Signal (terminal) —
Threshold When the data error in the EEPROM memory function of ECU is detected
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

Heat pump control unit

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE HEAT PUMP CONTROL UNIT

Replace heat pump control unit. Refer to Removal & Installation.

>>

INSPECTION END

P1c00-47 Heat Pump Control Unit

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C00–47 Heat pump control unit Diagnosis condition Power switch ON
Signal (terminal) —
Threshold When the Watchdog timer detects an error (control of the entire ECU is not operating normally)
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

Heat pump control unit

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE HEAT PUMP CONTROL UNIT

Replace heat pump control unit. Refer to Removal & Installation.

>>

INSPECTION END

P1c00-49 Heat Pump Control Unit

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C00–49 Heat pump control unit Diagnosis condition Power switch ON
Signal (terminal) —
Threshold When an abnormality is detected in the IC for CAN communication
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

Heat pump control unit

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE HEAT PUMP CONTROL UNIT

Replace heat pump control unit. Refer to Removal & Installation.

>>

INSPECTION END

P1c01-71 High Pressure Refrigerant Channel Switching Valve

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C01-71 High pressure refrigerant channel switching valve Diagnosis condition Power switch ON
Signal (Terminal) High pressure refrigerant channel switching valve control signal circuit
Threshold When the control signal error of high pressure refrigerant channel switching valve is detected
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • High pressure refrigerant channel switching valve

  • Heat pump control unit

  • Harness or connectors (switching valve circuit is open or shorted)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK HIGH PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect high pressure refrigerant channel switching valve connector.

  3. Power switch ON.

  4. Check voltage between high pressure refrigerant channel switching valve harness connector and ground.

+ - Voltage
High pressure refrigerant channel switching valve
Connector Terminal
B51 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair the high pressure refrigerant channel switching valve power supply circuit.

CHECK HIGH PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE CONTROL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between high pressure refrigerant channel switching valve harness connector and heat pump control unit harness connector.

    High pressure refrigerant channel switching valve Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    B51 2 M913 5 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK HIGH PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE CONTROL CIRCUIT FOR SHORT

  1. Check continuity between high pressure refrigerant channel switching valve harness connector and ground.

    High pressure refrigerant channel switching valve — Continuity
    Connector Terminal
    B51 2 Ground Not existed

  2. Check voltage between high pressure refrigerant channel switching valve harness connector and ground.

    + -

    Voltage

    (Approx.)
    High pressure refrigerant channel switching valve
    Connector Terminal
    B51 2 Ground 0 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK HIGH PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE

Check high pressure refrigerant channel switching valve. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace high pressure refrigerant channel switching valve. Refer to Removal & Installation.

Component Inspection

CHECK HIGH PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE

  1. Power switch OFF.

  2. Disconnect high pressure refrigerant channel switching valve connector.

  3. Check resistance between high pressure refrigerant channel switching valve terminals. Refer to applicable table for the normal value.

    Terminal

    Resistance (Ω)

    (Approx.)
    1 2

    13

    [Temperature condition: 20°C (68°F)]

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace high pressure refrigerant channel switching valve. Refer to Removal & Installation.

P1c02-71 Low Pressure Refrigerant Channel Switching Valve

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C02-71 Low pressure refrigerant channel switching valve Diagnosis condition Power switch ON
Signal (Terminal) Low pressure refrigerant channel switching valve control signal circuit
Threshold When the control signal error of low pressure refrigerant channel switching valve is detected
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Low pressure refrigerant channel switching valve

  • Heat pump control unit

  • Harness or connectors (switching valve circuit is open or shorted)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK LOW PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect low pressure refrigerant channel switching valve connector.

  3. Power switch ON.

  4. Check voltage between low pressure refrigerant channel switching valve harness connector and ground.

+ - Voltage
Low pressure refrigerant channel switching valve
Connector Terminal
B129 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair the low pressure refrigerant channel switching valve power supply circuit.

CHECK LOW PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE CONTROL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between low pressure refrigerant channel switching valve harness connector and heat pump control unit harness connector.

    Low pressure refrigerant channel switching valve Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    B129 2 M913 6 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK LOW PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE CONTROL CIRCUIT FOR SHORT

  1. Check continuity between low pressure refrigerant channel switching valve harness connector and ground.

    Low pressure refrigerant channel switching valve — Continuity
    Connector Terminal
    B129 2 Ground Not existed

  2. Check voltage between low pressure refrigerant channel switching valve harness connector and ground.

    + -

    Voltage

    (Approx.)
    Low pressure refrigerant channel switching valve
    Connector Terminal
    B129 2 Ground 0 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK LOW PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE

Check low pressure refrigerant channel switching valve. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace low pressure refrigerant channel switching valve. Refer to Removal & Installation.

Component Inspection

CHECK LOW PRESSURE REFRIGERANT CHANNEL SWITCHING VALVE

  1. Power switch OFF.

  2. Disconnect low pressure refrigerant channel switching valve connector.

  3. Check resistance between low pressure refrigerant channel switching valve terminals. Refer to applicable table for the normal value.

    Terminal

    Resistance (Ω)

    (Approx.)
    1 2

    13

    [Temperature condition: 20°C (68°F)]

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace low pressure refrigerant channel switching valve. Refer to Removal & Installation.

P1c04-71 Electric Expansion Valve (cooler)

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C04-71 Electric expansion valve (cooler) Diagnosis condition Power switch ON
Signal (Terminal) Electric expansion valve (cooler) drive signal circuit
Threshold When the drive signal error of electric expansion valve (cooler) is detected
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Electric expansion valve (cooler)

  • Heat pump control unit

  • Harness or connectors [electric expansion valve (cooler) circuit is open or shorted]

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK ELECTRIC EXPANSION VALVE (COOLER) DRIVE SIGNAL

  1. Power switch ON.

  2. Confirm output waveform between heat pump control unit harness connector with oscilloscope.

+ - Condition Output waveform
Heat pump control unit
Connector Terminal
M913 29 Ground When the start “Electric expansion initialize” in “Active Test” mode of “HEAT PUMP CONTROL”

30
31
32

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK ELECTRIC EXPANSION VALVE (COOLER) DRIVE SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector and electric expansion valve (cooler) connector.

  3. Check continuity between electric expansion valve (cooler) harness connector and heat pump control unit harness connector.

    Electric expansion valve (cooler) Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    B625 4 M913 29 Existed
    1 30
    5 31
    2 32

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK ELECTRIC EXPANSION VALVE (COOLER) CONTROL CIRCUIT FOR SHORT

  1. Check continuity between electric expansion valve (cooler) harness connector and ground.

    Electric expansion valve (cooler) — Continuity
    Connector Terminal
    B625 4 Ground Not existed
    1
    5
    2

  2. Check voltage between electric expansion valve (cooler) harness connector and ground.

    + -

    Voltage

    (Approx.)
    Electric expansion valve (cooler)
    Connector Terminal
    B625 4 Ground 0 V
    1
    5
    2

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK ELECTRIC EXPANSION VALVE (COOLER)

Check electric expansion valve (cooler). Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace electric expansion valve (cooler). Refer to Removal & Installation.

Component Inspection

CHECK ELECTRIC EXPANSION VALVE (COOLER)

  1. Power switch OFF.

  2. Disconnect electric expansion valve (cooler) connector.

  3. Check resistance between electric expansion valve (cooler) terminals. Refer to applicable table for the normal value.

    Terminal

    Resistance (Ω)

    (Approx.)
    1 4

    9

    [Temperature condition: 20°C (68°F)]
    2 5

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric expansion valve (cooler). Refer to Removal & Installation.

P1c05-71 Electric Expansion Valve (heater)

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C05-71 Electric expansion valve (heater) Diagnosis condition Power switch ON
Signal (Terminal) Electric expansion valve (heater) drive signal circuit
Threshold When the drive signal error of electric expansion valve (heater) is detected
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Electric expansion valve (heater)

  • Heat pump control unit

  • Harness or connectors [electric expansion valve (heater) circuit is open or shorted]

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK ELECTRIC EXPANSION VALVE (HEATER) DRIVE SIGNAL

  1. Power switch ON.

  2. Confirm output waveform between heat pump control unit harness connector with oscilloscope.

+ - Condition Output waveform
Heat pump control unit
Connector Terminal
M913 13 Ground When the start “Electric expansion initialize” in “Active Test” mode of “HEAT PUMP CONTROL”

14
15
16

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK ELECTRIC EXPANSION VALVE (HEATER) DRIVE SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector and electric expansion valve (heater) connector.

  3. Check continuity between electric expansion valve (heater) harness connector and heat pump control unit harness connector.

    Electric expansion valve (heater) Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    B750 2 M913 13 Existed
    5 14
    1 15
    4 16

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK ELECTRIC EXPANSION VALVE (HEATER) CONTROL CIRCUIT FOR SHORT

  1. Check continuity between electric expansion valve (heater) harness connector and ground.

    Electric expansion valve (heater) — Continuity
    Connector Terminal
    B750 2 Ground Not existed
    5
    1
    4

  2. Check voltage between electric expansion valve (heater) harness connector and ground.

    + -

    Voltage

    (Approx.)
    Electric expansion valve (heater)
    Connector Terminal
    B750 2 Ground 0 V
    5
    1
    4

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK ELECTRIC EXPANSION VALVE (HEATER)

Check electric expansion valve (heater). Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace electric expansion valve (heater). Refer to Removal & Installation.

Component Inspection

CHECK ELECTRIC EXPANSION VALVE (HEATER)

  1. Power switch OFF.

  2. Disconnect electric expansion valve (heater) connector.

  3. Check resistance between electric expansion valve (heater) terminals. Refer to applicable table for the normal value.

    Terminal

    Resistance (Ω)

    (Approx.)
    1 4

    9

    [Temperature condition: 20°C (68°F)]
    2 5

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric expansion valve (heater). Refer to Removal & Installation.

P1c06-1f Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C06–1F Electric compressor HVIL circuit Diagnosis condition Nissan Ariya Vehicle is READY
Signal (terminal) —
Threshold When HVIL open circuit is detected in electric compressor
Diagnosis delay time Less than 1 second

POSSIBLE CAUSE

  • High voltage harness connector connecting malfunction

  • High voltage harness connector

  • Electric compressor

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Set the Nissan Ariya vehicle to READY.

  3. Operate the air conditioning system.

  4. Set the temperature to full cold.

  5. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

DIAGNOSIS PROCEDURE

CAUTION:

Erase DTC after the work is completed.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK THE CONNECTION STATUS OF THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNECTOR

Check that the high voltage harness connector of electric compressor is connected normally.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Reconnect the high voltage harness connector. If reconnecting is impossible due to high voltage harness connector malfunction, replace the high voltage harness between electric compressor and high voltage junction box.

CHECK THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNECTOR

  1. Disconnect the electric compressor high voltage harness connector.

  2. Check for any adhering foreign substances, cracking, or damage on the high voltage harness connector terminal of electric compressor.

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Replace the high voltage harness between electric compressor and high voltage junction box.

CHECK THE HVIL CIRCUIT OF THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNECTOR

Check for continuity between HVIL circuit terminals of electric compressor Nissan Ariya vehicle side high voltage harness connector. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace electric compressor. Refer to Removal & Installation.

NO>>

Replace the high voltage harness between electric compressor and high voltage junction box.

P1c07-49 Heat Pump Control Unit

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C07–49 Heat pump control unit LIN communication error Diagnosis condition Power switch ON
Signal (terminal) —
Threshold When an abnormality is detected in the IC for LIN communication
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

Heat pump control unit

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE HEAT PUMP CONTROL UNIT

Replace heat pump control unit. Refer to Removal & Installation.

>>

INSPECTION END

P1c0e-A2 Heat Pump Control Unit Power Supply

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C0E-A2 Heat pump control unit low voltage power supply Diagnosis condition Power switch ON
Signal (Terminal) Heat pump control unit power supply
Threshold Power supply voltage supplied to heat pump C/U is too low (less than 10.5 V)
Diagnosis delay time —

POSSIBLE CAUSE

  • Heat pump control unit

  • Harness or connector (heat pump control unit power supply circuits is open or shorted)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK HEAT PUMP CONTROL UNIT POWER SUPPLY AND GROUND CIRCUITS

Check heat pump control unit power supply and ground circuits. Refer to Diagnosis Procedure.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair or replace malfunctioning parts.

P1c10-11 Refrigerant Temperature Sensor (battery Chiller Inlet)

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C10-11 Refrigerant temperature sensor (battery chiller inlet) Diagnosis condition Power switch ON
Signal (Terminal) Refrigerant temperature sensor (battery chiller inlet) signal
Threshold The refrigerant temperature sensor (battery chiller inlet) recognition temperature is too high [more than 162°C (323°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Refrigerant temperature sensor (battery chiller inlet)

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is shorted to ground)

FAIL-SAFE

Operate only cooler

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET) SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    + - Voltage
    Heat pump control unit
    Connector Terminal Connector Terminal
    M914 33 M913 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET) POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect refrigerant temperature sensor (battery chiller inlet) connector.

  3. Power switch ON.

  4. Check voltage between refrigerant temperature sensor (battery chiller inlet) harness connector and ground.

    + -

    Voltage

    (Approx.)
    Refrigerant temperature sensor (battery chiller inlet)
    Connector Terminal
    B46 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET)

Check refrigerant temperature sensor (battery chiller inlet). Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace refrigerant temperature sensor (battery chiller inlet). Refer to Removal & Installation.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET) POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between refrigerant temperature sensor (battery chiller inlet) harness connector and ground.

    Refrigerant temperature sensor (battery chiller inlet) — Continuity
    Connector Terminal
    B46 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET)

  1. Power switch OFF.

  2. Remove refrigerant temperature sensor (battery chiller inlet). Refer to Removal & Installation.

  3. Check resistance between refrigerant temperature sensor (battery chiller inlet) harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.86
    −10 (14) 9.58
    0 (32) 6.00
    10 (50) 3.89
    20 (68) 2.59
    25 (77) 2.14
    30 (86) 1.78
    40 (104) 1.25

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace refrigerant temperature sensor (battery chiller inlet). Refer to Removal & Installation.

P1c10-12 Refrigerant Temperature Sensor (battery Chiller Inlet)

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C10–12 Refrigerant temperature sensor (battery chiller inlet) Diagnosis condition Power switch ON
Signal (Terminal) Refrigerant temperature sensor (battery chiller inlet) signal
Threshold The refrigerant temperature sensor (battery chiller inlet) recognition temperature is too low [less than -60°C (-76°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Refrigerant temperature sensor (battery chiller inlet)

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is open or shorted)

FAIL-SAFE

Operate only cooler

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET) SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    + - Voltage
    Heat pump control unit
    Connector Terminal Connector Terminal
    M914 33 M913 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET) POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect refrigerant temperature sensor (battery chiller inlet) connector.

  3. Power switch ON.

  4. Check voltage between refrigerant temperature sensor (battery chiller inlet) harness connector and ground.

    + -

    Voltage

    (Approx.)
    Refrigerant temperature sensor (battery chiller inlet)
    Connector Terminal
    B46 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET)

Check refrigerant temperature sensor (battery chiller inlet). Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace refrigerant temperature sensor (battery chiller inlet). Refer to Removal & Installation.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET) POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between refrigerant temperature sensor (battery chiller inlet) harness connector and ground.

    Refrigerant temperature sensor (battery chiller inlet) — Continuity
    Connector Terminal
    B46 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER INLET)

  1. Power switch OFF.

  2. Remove refrigerant temperature sensor (battery chiller inlet). Refer to Removal & Installation.

  3. Check resistance between refrigerant temperature sensor (battery chiller inlet) harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.86
    −10 (14) 9.58
    0 (32) 6.00
    10 (50) 3.89
    20 (68) 2.59
    25 (77) 2.14
    30 (86) 1.78
    40 (104) 1.25

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace refrigerant temperature sensor (battery chiller inlet). Refer to Removal & Installation.

P1c11-11 Refrigerant Temperature Sensor (battery Chiller Outlet)

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C11-11 Refrigerant temperature sensor (battery chiller outlet) Diagnosis condition Power switch ON
Signal (Terminal) Refrigerant temperature sensor (battery chiller outlet) signal
Threshold The refrigerant temperature sensor (battery chiller outlet) recognition temperature is too high [more than 162°C (323°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Refrigerant temperature sensor (battery chiller outlet)

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is shorted to ground)

FAIL-SAFE

Operate only cooler

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET) SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    + - Voltage
    Heat pump control unit
    Connector Terminal Connector Terminal
    M914 39 M913 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET) POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect refrigerant temperature sensor (battery chiller outlet) connector.

  3. Power switch ON.

  4. Check voltage between refrigerant temperature sensor (battery chiller outlet) harness connector and ground.

    + -

    Voltage

    (Approx.)
    Refrigerant temperature sensor (battery chiller outlet)
    Connector Terminal
    B48 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET)

Check refrigerant temperature sensor (battery chiller outlet). Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace refrigerant temperature sensor (battery chiller outlet). Refer to Removal & Installation.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET) POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between refrigerant temperature sensor (battery chiller outlet) harness connector and ground.

    Refrigerant temperature sensor (battery chiller outlet) — Continuity
    Connector Terminal
    B48 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET)

  1. Power switch OFF.

  2. Remove refrigerant temperature sensor (battery chiller outlet). Refer to Removal & Installation.

  3. Check resistance between refrigerant temperature sensor (battery chiller outlet) harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.86
    −10 (14) 9.58
    0 (32) 6.00
    10 (50) 3.89
    20 (68) 2.59
    25 (77) 2.14
    30 (86) 1.78
    40 (104) 1.25

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace refrigerant temperature sensor (battery chiller outlet). Refer to Removal & Installation.

P1c11-12 Refrigerant Temperature Sensor (battery Chiller Outlet)

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C11-12 Refrigerant temperature sensor (battery chiller outlet) Diagnosis condition Power switch ON
Signal (Terminal) Refrigerant temperature sensor (battery chiller outlet) signal
Threshold The refrigerant temperature sensor (battery chiller outlet) recognition temperature is too low [less than -60°C (-76°F)]
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Refrigerant temperature sensor (battery chiller outlet)

  • Heat pomp control unit

  • Harness or connectors (the sensor circuit is open or shorted)

FAIL-SAFE

Operate only cooler

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET) SIGNAL

  1. Power switch ON.

  2. Check voltage between heat pump control unit harness connector.

    + - Voltage
    Heat pump control unit
    Connector Terminal Connector Terminal
    M914 39 M913 27

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET) POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect refrigerant temperature sensor (battery chiller outlet) connector.

  3. Power switch ON.

  4. Check voltage between refrigerant temperature sensor (battery chiller outlet) harness connector and ground.

    + -

    Voltage

    (Approx.)
    Refrigerant temperature sensor (battery chiller outlet)
    Connector Terminal
    B48 1 Ground 5 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 4.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET)

Check refrigerant temperature sensor (battery chiller outlet). Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace refrigerant temperature sensor (battery chiller outlet). Refer to Removal & Installation.

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET) POWER SUPPLY CIRCUIT FOR SHORT

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between refrigerant temperature sensor (battery chiller outlet) harness connector and ground.

    Refrigerant temperature sensor (battery chiller outlet) — Continuity
    Connector Terminal
    B48 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Component Inspection

CHECK REFRIGERANT TEMPERATURE SENSOR (BATTERY CHILLER OUTLET)

  1. Power switch OFF.

  2. Remove refrigerant temperature sensor (battery chiller outlet). Refer to Removal & Installation.

  3. Check resistance between refrigerant temperature sensor (battery chiller outlet) harness connector terminals. Refer to applicable table for the normal value.

    Terminal Condition Resistance: kΩ
    Temperature: °C (°F)
    1 2 −20 (−4) 15.86
    −10 (14) 9.58
    0 (32) 6.00
    10 (50) 3.89
    20 (68) 2.59
    25 (77) 2.14
    30 (86) 1.78
    40 (104) 1.25

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace refrigerant temperature sensor (battery chiller outlet). Refer to Removal & Installation.

P1c12-93 Expansion Valve (battery Chiller)

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
P1C12-93 Expansion valve (battery chiller) Diagnosis condition Power switch ON
Signal (Terminal) Expansion valve (battery chiller) drive signal circuit
Threshold When the drive signal error of expansion valve (battery chiller) is detected
Diagnosis delay time 4 seconds or more

POSSIBLE CAUSE

  • Expansion valve (battery chiller)

  • Heat pump control unit

  • Harness or connectors [expansion valve (battery chiller) circuit is open or shorted]

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK EXPANSION VALVE (BATTERY CHILLER) DRIVE SIGNAL

  1. Power switch ON.

  2. Confirm output waveform between heat pump control unit harness connector with oscilloscope.

+ - Condition Output waveform
Heat pump control unit
Connector Terminal
M914 37 Ground When the start “Electric expansion initialize” in “Active Test” mode of “HEAT PUMP CONTROL”

38
43
44

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

GO TO 2.

CHECK EXPANSION VALVE (BATTERY CHILLER) DRIVE SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector and expansion valve (battery chiller) connector.

  3. Check continuity between expansion valve (battery chiller) harness connector and heat pump control unit harness connector.

    Expansion valve (battery chiller) Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    B626 2 M914 37 Existed
    5 38
    4 43
    1 44

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK EXPANSION VALVE (BATTERY CHILLER) CONTROL CIRCUIT FOR SHORT

  1. Check continuity between expansion valve (battery chiller) harness connector and ground.

    Expansion valve (battery chiller) — Continuity
    Connector Terminal
    B626 2 Ground Not existed
    5
    4
    1

  2. Check voltage between expansion valve (battery chiller) harness connector and ground.

    + -

    Voltage

    (Approx.)
    Expansion valve (battery chiller)
    Connector Terminal
    B626 2 Ground 0 V
    5
    4
    1

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair harness or connector.

CHECK EXPANSION VALVE (BATTERY CHILLER)

Check expansion valve (battery chiller). Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Replace expansion valve (battery chiller). Refer to Removal & Installation.

Component Inspection

CHECK EXPANSION VALVE (BATTERY CHILLER)

  1. Power switch OFF.

  2. Disconnect expansion valve (battery chiller) connector.

  3. Check resistance between expansion valve (battery chiller) terminals. Refer to applicable table for the normal value.

    Terminal

    Resistance (Ω)

    (Approx.)
    1 4

    9

    [Temperature condition: 20°C (68°F)]
    2 5

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace expansion valve (battery chiller). Refer to Removal & Installation.

U1d20-87 Electric Compressor

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1D20–87 Electric compressor LIN communication error Diagnosis condition Power switch ON
Signal (terminal) LIN (electric compressor) signal
Threshold Detects abnormalities in the signal transmitted from the electric compressor
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Electric compressor

  • Heat pump control unit

  • Harness or connectors (electric compressor circuit is open or shorted)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK ELECTRIC COMPRESSOR LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect electric compressor and heat pump control unit connector.

  3. Check continuity between electric compressor harness connector and heat pump control unit harness connector.

    Electric compressor Heat pump control unit Continuity
    Connector Terminal Connector Terminal
    F7 2 M913 4 Existed

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair harness or connector.

CHECK ELECTRIC COMPRESSOR LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • PTC heater

    • A/C auto amp.

    • Li-ion battery

  2. Check continuity between electric compressor harness connector and ground.

    Electric compressor — Continuity
    Connector Terminal
    F7 2 Ground Not existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK ELECTRIC COMPRESSOR POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between electric compressor harness connector and ground.

    + − Voltage
    Electric compressor
    Connector Terminal
    F7 4 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace electric compressor 12 V power supply circuit.

CHECK ELECTRIC COMPRESSOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Check continuity between electric compressor harness connector and ground.

Electric compressor — Continuity
Connector Terminal
F7 5 Ground Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK HEAT PUMP CONTROL UNIT

  1. Reconnect all harness connectors disconnected.

  2. Set the Nissan Ariya vehicle to READY.

  3. Check that the electric compressor operates normally in each mode.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Replace heat pump control unit. (refer to Removal & Installation) GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Replace electric compressor. Refer to Removal & Installation.

NO>>

INSPECTION END

U1d25-87 A/c Auto Amp.

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U1D25–87 A/C auto amp. LIN communication error Diagnosis condition Power switch ON
Signal (terminal) LIN (A/C auto amp.) signal
Threshold Detects abnormalities in the signal transmitted from the A/C auto amp.
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Heat pump control unit

  • A/C auto amp.

  • Harness or connectors (A/C auto amp. communication circuit is open or shorted)

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK A/C AUTO AMP. LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit and A/C auto amp. connector.

  3. Check continuity between heat pump control unit harness connector and A/C auto amp. harness connector.

    Heat pump control unit A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M913 4 M1 52 Existed

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair harness or connector.

CHECK A/C AUTO AMP. LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • PTC heater

    • Electric compressor

    • Li-ion battery

  2. Check continuity between A/C auto amp. harness connector and ground.

    A/C auto amp. — Continuity
    Connector Terminal
    M1 52 Ground Not existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector.

CHECK A/C AUTO AMP. POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between A/C auto amp. harness connector and ground.

    + − Voltage
    A/C auto amp.
    Connector Terminal
    M1 60 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace electric compressor 12 V power supply circuit.

CHECK A/C AUTO AMP. GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Check continuity between A/C auto amp. harness connector and ground.

A/C auto amp. — Continuity
Connector Terminal
M1 58 Ground Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK HEAT PUMP CONTROL UNIT

  1. Reconnect all harness connectors disconnected.

  2. Set the Nissan Ariya vehicle to READY.

  3. Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Replace heat pump control unit. (refer to Removal & Installation) GO TO 6.

NO>>

GO TO 6.

PERFORM DTC CONFIRMATION PROCEDURE

Perform DTC confirmation procedure. Refer to DTC Description.

Is DTC detected?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

INSPECTION END

U2143-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-Nissan Ariya vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern Nissan Ariya vehicle is equipped with many electronic control unit, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H-line, CAN L-line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen items DTC Detection Condition
U2143–87 CAN communication error (VCM/HCM) Diagnosis condition Power switch ON
Signal (terminal) CAN communication signal
Threshold Heat pump control unit is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Perform “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U2148-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U2148-87 CAN communication error (brake control unit) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold Heat pump control unit is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U214e-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U214E-87 CAN communication error (combination meter) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold Heat pump control unit is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U214f-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U214F-87 CAN communication error (BCM) Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold Heat pump control unit is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U2153-87 Can Comm Circuit

DTC Description

DESCRIPTION

CAN (Controller Area Network) is a serial communication system for real time application. It is an on-Nissan Ariya vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto Nissan Ariya vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.

CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U2153-87 CAN communication error (Heating, Ventilating, Air Conditioning) ch1 Diagnosis condition Power switch ON
Signal (Terminal) CAN communication signal
Threshold Heat pump control unit is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

CAN communication system

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” with CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

CHECK CAN COMMUNICATION SYSTEM

Check CAN communication system. Refer to Trouble Diagnosis Flow Chart.

>>

INSPECTION END

U3d01-06 Heat Pump Control Unit

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
U3D01–06 Heat pump control unit Diagnosis condition Power switch ON
Signal (terminal) —
Threshold When an error in the ROM written to the ECU is detected
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

Heat pump control unit

FAIL-SAFE

Electric compressor operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Select “Self Diagnostic Result” mode of “HEAT PUMP CONTROL” using CONSULT.

Is DTC detected?

YES>>

Refer to Diagnosis Procedure.

NO-1>>

To check malfunction symptom before repair: Refer to Intermittent Incident.

NO-2>>

Confirmation after repair: INSPECTION END

Diagnosis Procedure

REPLACE HEAT PUMP CONTROL UNIT

Replace heat pump control unit. Refer to Removal & Installation.

>>

INSPECTION END

Power Supply and Ground Circuit (a/c Auto Amp.)

Diagnosis Procedure

CHECK A/C AUTO AMP. GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between A/C auto amp. harness connector and ground.

    A/C auto amp. — Continuity
    Connector Terminal
    M1 58 Ground Existed

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair harness or connector.

CHECK FUSE

Check that the following fuse is not blown (open).

Unit Location Fuse No. Capacity
A/C auto amp. Fuse and fusible link block #81 10A

NOTE:

For details of fuse, connector and terminal arrangement. Refer to Wiring Diagram.

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

NO>>

GO TO 3.

CHECK A/C AUTO AMP. POWER SUPPLY

  1. Connect A/C auto amp. connector.

  2. Power switch ON

  3. Check voltage between A/C auto amp. harness connector terminals.

    A/C auto amp. Voltage
    Connector Terminal
    + -
    M1 60 58 10.5 – 16 V

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair the A/C auto amp. power supply circuit.

Power Supply and Ground Circuit (a/c Control)

Diagnosis Procedure

CHECK FUSE

  1. Power switch OFF.

  2. Check that the following fuse is not blown (open).

    Unit Location Fuse No. Capacity
    A/C control Fuse and fusible link block #81 10A

    NOTE:

    For details of fuse, connector and terminal arrangement. Refer to Wiring Diagram.

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

NO>>

GO TO 2.

CHECK A/C CONTROL POWER SUPPLY

  1. Disconnect A/C control connector.

  2. Power switch ON.

  3. Check voltage between A/C control harness connector and ground.

    + - Voltage
    A/C control
    Connector Terminal
    M69 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair harness or connector between A/C control and fuse.

CHECK A/C CONTROL GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Check continuity between A/C control harness connector and ground.

    A/C control — Continuity
    Connector Terminal
    M69 6 Ground Existed

Is the inspection result normal?

YES>>

Replace A/C control. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Power Supply and Ground Circuit (heat Pump Control Unit)

Diagnosis Procedure

CHECK HEAT PUMP CONTROL UNIT GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect heat pump control unit connector.

  3. Check continuity between heat pump control unit harness connector and ground.

    Heat pump control unit — Continuity
    Connector Terminal
    M913 19 Ground Existed
    28
    M914 40

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair harness or connector.

CHECK FUSE

Check that the following fuse is not blown (open).

Unit Location Fuse No. Capacity
Heat pump control unit Fuse and fusible link block #81 10A

NOTE:

For details of fuse, connector and terminal arrangement. Refer to Wiring Diagram.

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after repairing the affected circuit if a fuse is blown (open).

NO>>

GO TO 3.

CHECK HEAT PUMP CONTROL UNIT POWER SUPPLY

  1. Connect heat pump control unit connector.

  2. Power switch ON.

  3. Check voltage between heat pump control unit harness connector terminals.

    + - Voltage
    Heat pump control unit
    Connector Terminal
    M913 17 Ground 10.5 – 16 V

Is the inspection result normal?

YES>>

Replace heat pump control unit. Refer to Removal & Installation.

NO>>

Repair the heat pump control unit power supply circuit.

Blower Motor Circuit

Diagnosis Procedure

CHECK FUSIBLE LINK

  1. Power switch OFF.

  2. Check that the following fusible link is not blown (open).

    Unit Location Fusible link No. Capacity
    Blower relay Fuse and fusible link block #J 50 A

    NOTE:

    For details of fusible link, connector and terminal arrangement. Refer to Wiring Diagram.

Is the fusible link blown (open)?

YES>>

Replace the blown (open) fusible link after repairing the affected circuit if a fusible link is blown (open).

NO>>

GO TO 2.

CHECK BLOWER MOTOR POWER SUPPLY

  1. Disconnect the blower motor connector.

  2. Power switch ON.

  3. Check voltage between blower motor harness connector and ground.

    + - Voltage
    Blower motor
    Connector Terminal
    M330 2 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 6.

CHECK BLOWER MOTOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Check continuity between blower motor harness connector and ground.

    Blower motor — Continuity
    Connector Terminal
    M330 4 Ground Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair the harnesses or connectors.

CHECK BLOWER MOTOR CONTROL SIGNAL

  1. Connect blower motor connector.

  2. Power switch ON.

  3. Check duty ratios between blower motor harness connector and ground by using an oscilloscope.

    + - Condition Output waveform
    Blower motor
    Connector Terminal
    M330 1 Ground Blower motor: OFF 10.5 – 16 V
    Blower motor: 1st speed (manual)

    Blower motor: 7th speed (manual)

Is the inspection result normal?

YES>>

Replace blower motor. Refer to Removal & Installation.

NO>>

GO TO 5.

CHECK BLOWER MOTOR CONTROL SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect blower motor connector and A/C auto amp. connector.

  3. Check continuity between blower motor harness connector and A/C auto amp. harness connector.

    Blower motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M330 1 M2 34 Existed

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Repair the harnesses or connectors.

CHECK BLOWER MOTOR POWER SUPPLY CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Remove blower relay.

  3. Check continuity between blower motor harness connector and blower relay harness connector.

    Blower motor Blower relay Continuity
    Connector Terminal Connector Terminal
    M330 2 E101 3 Existed

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair the harnesses or connectors.

CHECK BLOWER MOTOR RELAY GROUND CIRCUIT FOR OPEN (COIL SIDE)

Check continuity between blower relay harness connector and ground.

Blower relay — Continuity
Connector Terminal
E101 2 Ground Existed

Is the inspection result normal?

YES>>

GO TO 8.

NO>>

Repair the harnesses or connectors.

CHECK BLOWER MOTOR RELAY

Check blower relay. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Repair the blower relay power supply circuit.

NO>>

Replace blower relay.

REPLACE BLOWER MOTOR

  1. Replace blower motor. Refer to Removal & Installation.

  2. Connect A/C auto amp. connector.

  3. Power switch ON.

  4. Change fan speed from 1st – 7th, and check that blower motor operates normally.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace A/C auto amp. Refer to Removal & Installation.

Component Inspection

CHECK BLOWER RELAY

  1. Power switch OFF.

  2. Remove blower relay.

  3. Check continuity between blower relay terminals.

    Terminal Condition Continuity
    Blower relay
    12 V direct current supply between terminals and . Existed
    No current supply Not existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace blower relay.

Blower Motor

Component Inspection

CHECK BLOWER MOTOR-I

  1. Remove blower motor. Refer to Removal & Installation.

  2. Check that there is not any mixing foreign object in the blower motor.

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Remove foreign object in the blower motor.

CHECK BLOWER MOTOR-II

Check that there is not breakage or damage in the blower motor.

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace blower motor. Refer to Removal & Installation.

CHECK BLOWER MOTOR-III

Check that blower motor turns smoothly.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace blower motor. Refer to Removal & Installation.

Door Motor Circuit

Diagnosis Procedure

NOTE:

If multiple of door motor DTCs （B2480-93, B24DF-93, B24F5-93, B24F6-93, B24F7-93, B24F8-93）are detected, check this circuit.

CHECK DTC

Check detected DTC of the door motor system.

Detected B2480- 93, B24F5- 93, B24F6- 93>>

GO TO 2.

Detected B24DF- 93, B24F7- 93, B24F8- 93>>

GO TO 3.

Detected B2480- 93, B24DF- 93, B24F5- 93, B24F6- 93, B24F7- 93, B24F8- 93>>

GO TO 4.

CHECK DOOR MOTOR POWER SUPPLY-1

  1. Power switch ON.

  2. Check voltage between intake door motor harness connector and ground.

+ - Voltage
Intake door motor
Connector Terminal
M908 1 Ground 10.5 – 16 V

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 8.

CHECK DOOR MOTOR POWER SUPPLY-2

  1. Power switch ON.

  2. Check voltage between air mix door motor RH harness connector and ground.

+ - Voltage
Air mix door motor RH
Connector Terminal
M321 1 Ground 10.5 – 16 V

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 9.

CHECK DOOR MOTOR GROUND CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect intake door motor connector and A/C auto amp. connector.

  3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

    Intake door motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M908 2 M2 27 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair harness or connector.

CHECK DOOR MOTOR LIN SIGNAL

  1. Connect intake door motor connector and A/C auto amp. connector.

  2. Power switch ON.

  3. Confirm output waveform between intake door motor harness connector and A/C auto amp. harness connector with oscilloscope.

    + - Output waveform
    Intake door motor A/C auto amp.
    Connector Terminal Connector Terminal
    M908 3 M1 58

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

GO TO 6.

CHECK DOOR MOTOR LIN SIGNAL CIRCUIT FOR OPEN

  1. Power switch OFF.

  2. Disconnect A/C auto amp. and intake door motor connector.

  3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

    Intake door motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M908 3 M2 2 Existed

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

Repair harness or connector.

CHECK DOOR MOTOR LIN SIGNAL CIRCUIT FOR SHORT

  1. Disconnect following connectors.

    • Air mix door motor LH

    • Air mix door motor RH

    • Front mode door motor LH

    • Front mode door motor RH

    • Rear mode door motor

  2. Check continuity between A/C auto amp. harness connector and ground.

    A/C auto amp. — Continuity
    Connector Terminal
    M2 2 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

CHECK DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN-1

  1. Power switch OFF.

  2. Disconnect intake door motor and A/C auto amp. connector.

  3. Check continuity between intake door motor harness connector and A/C auto amp. harness connector.

    Intake door motor A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M908 1 M2 27 Existed

Is the inspection result normal?

YES>>

GO TO 10.

NO>>

Repair harness or connector.

CHECK DOOR MOTOR POWER SUPPLY CIRCUIT FOR OPEN-2

  1. Power switch OFF.

  2. Disconnect air mix door motor RH and A/C auto amp. connector.

  3. Check continuity between air mix door motor RH harness connector and A/C auto amp. harness connector.

    Air mix door motor RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    M321 1 M2 1 Existed

Is the inspection result normal?

YES>>

GO TO 11.

NO>>

Repair harness or connector.

CHECK DOOR MOTOR POWER SUPPLY CIRCUIT FOR SHORT-1

  1. Disconnect front mode door motor RH and front mode door motor LH connector.

  2. Check continuity between A/C auto amp. harness connector and ground.

    A/C auto amp. — Continuity
    Connector Terminal
    M2 21 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

CHECK DOOR MOTOR POWER SUPPLY CIRCUIT FOR SHORT-2

  1. Disconnect air mix door motor LH and rear mode door motor connector.

  2. Check continuity between A/C auto amp. harness connector and ground.

    A/C auto amp. — Continuity
    Connector Terminal
    M2 1 Ground Not existed

Is the inspection result normal?

YES>>

Replace A/C auto amp. Refer to Removal & Installation.

NO>>

Repair harness or connector.

Electric Compressor

Insulation Resistance Check

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

DIAGNOSIS PROCEDURE

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK ELECTRIC COMPRESSOR INSULATION RESISTANCE

  1. Disconnect high voltage harness connector from electric compressor.

  2. Check the insulation resistance of the electric compressor with an insulation resistance tester.

    CAUTION:

    • Unlike the ordinary tester, the insulation resistance tester applies 500V when measuring. If used incorrectly, there is the danger of electric shock. If used in the Nissan Ariya vehicle 12V system, there is the danger of damage to electronic devices. Read the insulation resistance tester instruction manual carefully and be sure to work safely.

    • Use 500V range of insulation resistance tester to measure insulation resistance. Wait for 30 seconds until the value becomes stable.

+ − Resistance
Electric compressor
Terminal
7 Aluminum part on side of electric compressor 3 MΩ or more
8

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric compressor. Refer to Removal & Installation.

Component Inspection

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK ELECTRIC COMPRESSOR

  1. Power switch OFF.

  2. Disconnect electric compressor connector.

  3. Check voltage between electric compressor terminals using circuit tester diode mode.

    + - Voltage
    Electric compressor
    Terminal
    8 7 0.4 – 1.0 V

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace electric compressor. Refer to Removal & Installation.

Electric Compressor High Voltage Harness Connector (hvil Circuit)

Component Inspection

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK THE HVIL CIRCUIT OF THE ELECTRIC COMPRESSOR HIGH VOLTAGE HARNESS CONNECTOR

  1. Disconnect the cable from the negative terminal of the 12V battery.

  2. Disconnect the electric compressor high voltage harness connector.

  3. Check for continuity between HVIL circuit terminals of electric compressor Nissan Ariya vehicle side high voltage harness connector using a resistance meter.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace the high voltage harness between electric compressor and high voltage junction box.

Ptc Heater

Insulation Resistance Check

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

DIAGNOSIS PROCEDURE

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK PTC HEATER INSULATION RESISTANCE

  1. Disconnect high voltage harness connector from PTC heater.

  2. Check the insulation resistance of the PTC heater with an insulation resistance tester.

    CAUTION:

    • Unlike the ordinary tester, the insulation resistance tester applies 500V when measuring. If used incorrectly, there is the danger of electric shock. If used in the Nissan Ariya vehicle 12V system, there is the danger of damage to electronic devices. Read the insulation resistance tester instruction manual carefully and be sure to work safely.

    • Use 500V range of insulation resistance tester to measure insulation resistance. Wait for 30 seconds until the value becomes stable.

+ - Resistance
PTC heater
Terminal
1 Aluminum part of PTC heater 20 MΩ or more
2

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace PTC heater. Refer to Removal & Installation.

Component Inspection

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK PTC HEATER

  1. Power switch OFF.

  2. Disconnect PTC heater connector.

  3. Check voltage between PTC heater terminals using circuit tester diode mode.

    + - Voltage
    PTC heater
    Terminal
    1 2 0.4 V or more

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace PTC heater. Refer to Removal & Installation.

Ptc Heater High Voltage Harness Connector (hvil Circuit)

Component Inspection

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK THE HVIL CIRCUIT OF THE PTC HEATER HIGH VOLTAGE HARNESS CONNECTOR

  1. Disconnect the cable from the negative terminal of the 12V battery.

  2. Disconnect the PTC heater high voltage harness connector.

  3. Check for continuity between HVIL circuit terminals of PTC heater Nissan Ariya vehicle side high voltage harness connector using a resistance meter.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace the high voltage harness between PTC heater and high voltage junction box.

High Voltage Junction Box

Component Inspection

WARNING:

Since hybrid vehicles and electric Nissan Ariya vehicles contain a high voltage battery, there is the risk of electric shock, electric leakage, or similar accidents if the high voltage component and Nissan Ariya vehicle are handled incorrectly. Be sure to follow the correct work procedures when performing inspection and maintenance.

WARNING:

  • Be sure to remove the service plug in order to disconnect the high voltage circuits before performing inspection or maintenance of high voltage system harnesses and parts.

  • The removed service plug must always be carried in a pocket of the responsible worker or placed in the tool box during the procedure to prevent the plug from being connected by mistake.

  • Be sure to wear insulating protective equipment consisting of glove, shoes, face shield and glasses before beginning work on the high voltage system.

  • Never allow workers other than the responsible person to touch the Nissan Ariya vehicle containing high voltage parts. To keep others from touching the high voltage parts, these parts must be covered with an insulating sheet except when using them.

  • Refer to Precautions for High Voltage.

CAUTION:

Never bring the vehicle into the READY status with the service plug removed unless otherwise instructed in the Service Manual. A malfunction may occur if this is not observed.

PRECONDITIONING

WARNING:

Follow the instructions below before starting the procedure.

  1. Disconnect high voltage circuit. Refer to HOW TO DISCONNECT HIGH VOLTAGE : Precautions.

  2. Check voltage in high voltage circuit. Refer to CHECK VOLTAGE IN HIGH VOLTAGE CIRCUIT : Precautions.

>>

GO TO 2.

CHECK FUSE INSIDE OF HIGH VOLTAGE JUNCTION BOX

NOTE:

A fuse is built into the high voltage junction box, and a continuity check is performed to check if the fuse has blown.

  1. Power switch OFF.

  2. Disconnect high voltage junction box connector.

  3. Check continuity between each terminal of the high voltage junction box.

High voltage junction box Continuity
Connector Terminal Connector Terminal
H11 18 () H1 14 () Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace high voltage junction box. Refer to HIGH VOLTAGE JUNCTION BOX : Disassembly & Assembly.

 
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Nissan Ariya (FE0) 2023-2025 Service & Repair Manual

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