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Nissan Ariya: Dtc/circuit Diagnosis

Nissan Ariya (FE0) 2023-2025 Service & Repair Manual / Body Interior / Seat / Dtc/circuit Diagnosis

B2490-13 Front Seat Heater Lh

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen items DTC detection condition
B2490-13 Front seat heater LH A Diagnosis condition Power switch ON and front heated seat switch LH ON
Signal (terminal) —
Threshold CPU inside the front seat heater LH detected a heater current of 0.2 A or less
Diagnosis delay time 6 minuites or more
B Diagnosis condition Power switch ON and front heated seat switch LH ON
Signal (terminal) —
Threshold CPU inside the front seat heater LH detected heater sensor signal voltage of 4.94 V or more
Diagnosis delay time 94 seconds or more

POSSIBLE CAUSE

Front seat cushion heater LH

FAIL-SAFE

Front seat heater LH operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Front heated seat switch LH ON and wait at least 6 minutes or more.

  3. Check “Self Diagnostic Result” 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 SEAT CUSHION PAD

Replace seat cushion pad. Refer to Disassembly & Assembly.

>>

INSPECTION END

B2490-19 Front Seat Heater Lh

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen items DTC detection condition
B2490-19 Front seat heater LH A Diagnosis condition Power switch ON and front heated seat switch LH ON
Signal (terminal) —
Threshold CPU inside the front seat heater LH detected a heater current of 14 A or more
Diagnosis delay time 2 seconds or more
B Diagnosis condition Power switch ON and front heated seat switch LH ON
Signal (terminal) —
Threshold CPU inside the front seat heater LH detected a heater sensor signal voltage of 0.31 V or less
Diagnosis delay time 4 minuites or more
C Diagnosis condition Power switch ON and front heated seat switch LH ON
Signal (terminal) —
Threshold CPU inside the front seat heater LH counted 15,000 errors
Diagnosis delay time —

POSSIBLE CAUSE

  • Front seat cushion heater LH

  • Front seatback heater LH

FAIL-SAFE

Front seat heater LH operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Front heated seat switch LH ON and wait at least 4 minutes or more.

  3. Check “Self Diagnostic Result” 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 SEATBACK HEATER LH

Check front seatback heater LH. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace seat cushion pad. Refer to Disassembly & Assembly.

NO>>

Replace seatback assembly. Refer to Disassembly & Assembly.

Component Inspection

CHECK FRONT SEATBACK HEATER LH

  1. Power switch OFF.

  2. Disconnect front seatback heater LH connector.

  3. Check resistance between front seatback heater LH terminals.

    Front seatback heater LH Resistance
    Terminal
    2 1 4.61 – 5.63 Ω

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace seatback assembly. Refer to Disassembly & Assembly.

B2491-13 Seat Blower Motor Lh

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen items DTC detection condition
B2491-13 Seat blower motor LH Diagnosis condition Power switch ON and front ventilation seat switch LH ON
Signal (terminal) —
Threshold CPU inside the front seat heater LH detected a seat blower motor current of 0.112 A or less
Diagnosis delay time 2 seconds or more

POSSIBLE CAUSE

  • Front seat cushion blower motor LH

  • Front seat cushion heater LH

FAIL-SAFE

Seat blower motor LH operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Front ventilation seat switch LH ON and wait at least 2 minutes or more.

  3. Check “Self Diagnostic Result” 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 SEAT CUSHION PAD

Replace seat cushion pad. Refer to Disassembly & Assembly.

>>

INSPECTION END

B2491-19 Seat Blower Motor Lh

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen items DTC detection condition
B2491-19 Seat blower motor LH A Diagnosis condition Power switch ON and front ventilation seat switch LH ON
Signal (terminal) —
Threshold CPU inside the front seat heater LH detected a seat blower motor current of 4.52 A or more
Diagnosis delay time 2 seconds or more
B Diagnosis condition Power switch ON and front ventilation seat switch LH ON
Signal (terminal) —
Threshold CPU inside the front seat heater LH detected a seat blower motor speed control signal voltage of 1.0 V or less
Diagnosis delay time 1.5 seconds or more

POSSIBLE CAUSE

  • Front seat cushion blower motor LH

  • Front seatback blower motor LH

  • Front seat cushion heater LH

FAIL-SAFE

Seat blower motor LH operation is stopped

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Front ventilation seat switch LH ON and wait at least 2 seconds or more.

  3. Check “Self Diagnostic Result” 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 DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch OFF.

  2. Disconnect seatback blower motor LH connector.

  3. Power switch ON.

  4. Front ventilation seat switch LH ON and wait at least 2 seconds or more.

  5. Check “Self Diagnostic Result” of “HVAC” using CONSULT.

Is DTC detected?

YES>>

Replace seat cushion pad. Refer to Disassembly & Assembly.

NO>>

Replace seatback blower motor. Refer to Removal and Installation.

U1ca6-02 Front Seat Heater Rh Communication

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen items DTC detection condition
U1CA6-02 Front seat heater RH communication Diagnosis condition Power switch ON
Signal (terminal) LIN (heated seat) signal (terminal #45)
Threshold A/C auto amp. is not transmitting or receiving LIN communication with front seat heater RH
Diagnosis delay time 30 seconds or more

POSSIBLE CAUSE

  • Fuse

  • Harness or connectors (Front seat heater RH circuit is open or short to ground)

  • Front seat cushion heater RH

  • A/C auto amp.

FAIL-SAFE

—

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON and wait at least 30 seconds or more.

  2. Check “Self Diagnostic Result” 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).

    Signal name Fuse No.
    Front seat heater RH power supply 83 (15A)

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 FRONT SEAT HEATER RH POWER SUPPLY VOLTAGE

  1. Disconnect front seat heater RH connector.

  2. Power switch ON.

  3. Check voltage between front seat heater RH harness connector and ground.

    + - Voltage
    Front seat heater RH
    Connector Terminal
    B470 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the front seat heater RH power supply circuit.

CHECK FRONT SEAT HEATER RH GROUND CIRCUIT (OPEN)

  1. Power switch OFF.

  2. Check continuity between front seat heater RH harness connector and ground.

    Front seat heater RH ー Continuity
    Connector Terminal
    B470 4 Ground Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair the harness or connector.

CHECK FRONT SEAT HEATER RH LIN SIGNAL

  1. Power switch ON.

  2. Confirm output waveform between front seat heater RH harness connector and A/C auto amp. harness connector with oscilloscope.

    + – Output waveform
    Front seat heater RH A/C auto amp.
    Connector Terminal Connector Terminal
    B470 3 M1 58

Is the inspection result normal?

YES>>

Replace seat cushion pad. Refer to Disassembly & Assembly.

NO>>

GO TO 5.

CHECK FRONT SEAT HEATER RH LIN SIGNAL CIRCUIT (OPEN)

  1. Power switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between front seat heater RH harness connector and A/C auto amp. harness connector.

    Front seat heater RH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    B470 3 M1 45 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair the harness or connector.

CHECK FRONT SEAT HEATER RH LIN SIGNAL CIRCUIT (SHORT TO GROUND)

  1. Disconnect the following connectors that are connected to terminal 45 of the A/C auto amp.

    • Front seat heater LH

    • Rear seat heater LH

    • Rear seat heater RH

    • Humidity sensor

  2. Check continuity between front seat heater RH harness connector and ground.

    Front seat heater RH — Continuity
    Connector Terminal
    B470 3 Ground Not existed

Is the inspection result normal?

YES>>

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

NO>>

Repair the harness or connector.

Power Supply and Ground Circuit

Diagnosis Procedure

CHECK FUSE

  1. Power switch OFF.

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

    Signal name Fuse No.
    Battery power supply 58 (20A)

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 DRIVER LUMBAR SUPPORT CONTROL MODULE BATTERY POWER SUPPLY VOLTAGE

  1. Disconnect driver lumbar support control module connector.

  2. Check voltage between driver lumbar support control module harness connector and ground.

    + - Voltage
    Driver lumbar support control module
    Connector Terminal
    B724 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the driver lumbar support control module battery power supply circuit.

CHECK DRIVER LUMBAR SUPPORT CONTROL MODULE GROUND CIRCUIT (OPEN)

Check continuity between driver lumbar support control module harness connector and ground.

Driver lumbar support control module — Continuity
Connector Terminal
B724 10 Ground Existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Repair the harness or connector.

Lumbar Support Switch

Component Function Check

CHECK LUMBAR SUPPORT SWITCH FUNCTION

Operate the lumbar support switch and check that the seatback support operates.

Is the inspection result normal?

YES>>

Lumbar support switch is OK.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK LUMBAR SUPPORT SWITCH POWER SUPPLY VOLTAGE

  1. Power switch OFF.

  2. Disconnect lumbar support switch connector.

  3. Check voltage between lumbar support switch harness connector and ground.

    + -

    Voltage

    (Approx.)
    Lumbar support switch
    Connector Terminal
    B725 80 Ground 12.5 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 2.

CHECK LUMBAR SUPPORT SWITCH SIGNAL CIRCUIT (OPEN)

  1. Disconnect driver lumbar support control module connector.

  2. Check continuity between lumbar support switch harness connector and driver lumbar support control module harness connector.

    Lumbar support switch Driver lumbar support control module Continuity
    Connector Terminal Connector Terminal
    B725 80 B724 80 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the harness or connector.

CHECK LUMBAR SUPPORT SWITCH SIGNAL CIRCUIT (SHORT TO GROUND)

Check continuity between lumbar support switch harness connector and ground.

Lumbar support switch — Continuity
Connector Terminal
B725 80 Ground Not existed

Is the inspection result normal?

YES>>

Replace lumbar support unit. Refer to Disassembly & Assembly.

NO>>

Repair the harness or connector.

CHECK LUMBAR SUPPORT SWITCH GROUND CIRCUIT (OPEN)

  1. Disconnect driver lumbar support control module connector.

  2. Check continuity between lumbar support switch harness connector and driver lumbar support control module harness connector.

    Lumbar support switch Driver lumbar support control module Continuity
    Connector Terminal Connector Terminal
    B725 81 B724 81 Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair the harness or connector.

CHECK LUMBAR SUPPORT SWITCH

Check lumbar support switch. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace lumbar support unit. Refer to Disassembly & Assembly.

NO>>

Replace lumbar support switch. Refer to Removal and Installation.

Component Inspection

CHECK LUMBAR SUPPORT SWITCH

  1. Power switch OFF.

  2. Disconnect lumbar support switch connector.

  3. Check resistance between lumbar support switch terminals.

    Lumbar support switch Condition Resistance: kΩ
    Terminal
    80 81 Lumbar support switch Operate (upward) 3.855 – 4.217
    Operate (downward) 1.440 – 1.622
    Operate (forward) 0.640 – 0.742
    Operate (backward) 0.241 – 0.287
    Release ∞

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace lumbar support switch. Refer to Removal and Installation.

Lumbar Support Pump

Component Function Check

CHECK LUMBAR SUPPORT PUMP FUNCTION

Operate the lumbar support switch forward / upward / downward, and check from the sound that the lumbar support pump operates.

Is the inspection result normal?

YES>>

Lumbar support pump is OK

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK LUMBAR SUPPORT PUMP POWER SUPPLY VOLTAGE

  1. Power switch OFF.

  2. Disconnect lumbar support pump connector.

  3. Check voltage between lumbar support pump harness connector and ground.

    + - Condition

    Voltage

    (Approx.)
    Lumbar support pump
    Connector Terminal
    B726 82 Ground Lumbar support Forward/upward/downward 12 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 2.

CHECK LUMBAR SUPPORT PUMP POWER SUPPLY CIRCUIT (OPEN)

  1. Disconnect driver lumbar support control module connector.

  2. Check continuity between lumbar support pump harness connector and driver lumbar support control module harness connector.

    Lumbar support pump Driver lumbar support control module Continuity
    Connector Terminal Connector Terminal
    B726 82 B724 82 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the harness or connector.

CHECK LUMBAR SUPPORT PUMP POWER SUPPLY CIRCUIT (SHORT TO GROUND)

Check continuity between lumbar support pump harness connector and ground.

Lumbar support pump — Continuity
Connector Terminal
B726 82 Ground Not existed

Is the inspection result normal?

YES>>

Replace lumbar support unit. Refer to Disassembly & Assembly.

NO>>

Repair the harness or connector.

CHECK LUMBAR SUPPORT PUMP GROUND CIRCUIT

  1. Disconnect driver lumbar support control module connector.

  2. Check continuity between lumbar support pump harness connector and driver lumbar support control module harness connector.

    Lumbar support pump Driver lumbar support control module Continuity
    Connector Terminal Connector Terminal
    B726 83 B724 83 Existed

Is the inspection result normal?

YES>>

Replace lumbar support unit. Refer to Disassembly & Assembly.

NO>>

Repair the harness or connector.

Front Seat Heater Lh

Component Function Check

CHECK FRONT SEAT HEATER LH FUNCTION

  1. Power switch ON.

  2. Check that seat cushion and seatback of front seat LH warms when operating front heated seat switch LH.

Is the inspection result normal?

YES>>

Front seat heater LH is OK.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK FUSE

  1. Power switch OFF.

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

    Signal name Fuse No.
    Front seat heater LH power supply 84 (15A)

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 FRONT SEAT HEATER LH POWER SUPPLY VOLTAGE

  1. Disconnect front seat heater LH connector.

  2. Power switch ON.

  3. Check voltage between front seat heater LH harness connector and ground.

    + - Voltage
    Front seat heater LH
    Connector Terminal
    B472 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the front seat heater LH power supply circuit.

CHECK FRONT SEAT HEATER LH GROUND CIRCUIT (OPEN)

  1. Power switch OFF.

  2. Check continuity between front seat heater LH harness connector and ground.

    Front seat heater LH ー Continuity
    Connector Terminal
    B472 4 Ground Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair the harness or connector.

CHECK FRONT SEAT HEATER LH LIN SIGNAL

  1. Power switch ON.

  2. Confirm output waveform between front seat heater LH harness connector and A/C auto amp. harness connector with oscilloscope.

    + – Output waveform
    Front seat heater LH A/C auto amp.
    Connector Terminal Connector Terminal
    B472 3 M1 58

Is the inspection result normal?

YES>>

GO TO 7.

NO>>

GO TO 5.

CHECK FRONT SEAT HEATER LH LIN SIGNAL CIRCUIT (OPEN)

  1. Power switch OFF.

  2. Disconnect A/C auto amp. connector.

  3. Check continuity between front seat heater LH harness connector and A/C auto amp. harness connector.

    Front seat heater LH A/C auto amp. Continuity
    Connector Terminal Connector Terminal
    B472 3 M1 45 Existed

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Repair the harness or connector.

CHECK FRONT SEAT HEATER LH LIN SIGNAL CIRCUIT (SHORT TO GROUND)

  1. Disconnect the following connectors that are connected to terminal 45 of the A/C auto amp.

    • Front seat heater RH

    • Rear seat heater LH

    • Rear seat heater RH

    • Humidity sensor

  2. Check continuity between front seat heater LH harness connector and ground.

    Front seat heater LH — Continuity
    Connector Terminal
    B472 3 Ground Not existed

Is the inspection result normal?

YES>>

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

NO>>

Repair the harness or connector.

CHECK FRONT SEATBACK HEATER LH

Check front seatback heater LH. Refer to Component Inspection.

Is the inspection result normal?

YES>>

Replace seat cushion pad. Refer to Disassembly & Assembly.

NO>>

Replace seatback assembly. Refer to Disassembly & Assembly.

Component Inspection

CHECK FRONT SEATBACK HEATER LH

  1. Power switch OFF.

  2. Disconnect front seatback heater LH connector.

  3. Check resistance between front seatback heater LH terminals.

    Front seatback heater LH Resistance
    Terminal
    2 1 4.61 – 5.63 Ω

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace seatback assembly. Refer to Disassembly & Assembly.

Rear Heated Seat Switch Lh

Component Function Check

CHECK REAR HEATED SEAT SWITCH LH FUNCTION

  1. Set the Nissan Ariya vehicle to READY.

  2. Check that rear heated seat switch LH indicator (Low, Mid, High) turns ON when operating rear heated seat switch LH.

Is the inspection result normal?

YES>>

Rear heated seat switch LH is OK.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK REAR HEATED SEAT SWITCH LH POWER SUPPLY VOLTAGE

  1. Power switch OFF.

  2. Disconnect rear heated seat switch LH connector.

  3. Power switch ON.

  4. Check voltage between rear heated seat switch LH harness connector and ground.

    + -

    Voltage

    (Approx.)
    Rear heated seat switch LH
    Connector Terminal
    M209 5 Ground 12 V

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

GO TO 2.

CHECK REAR HEATED SEAT SWITCH LH SIGNAL CIRCUIT (OPEN)

  1. Power switch OFF.

  2. Disconnect A/C control connector.

  3. Check continuity between rear heated seat switch LH harness connector and A/C control harness connector.

    Rear heated seat switch LH A/C control Continuity
    Connector Terminal Connector Terminal
    M209 5 M69 8 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the harness or connector.

CHECK REAR HEATED SEAT SWITCH LH SIGNAL CIRCUIT (SHORT TO GROUND)

Check continuity between rear heated seat switch LH harness connector and ground.

Rear heated seat switch LH — Continuity
Connector Terminal
M209 5 Ground Not existed

Is the inspection result normal?

YES>>

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

NO>>

Repair the harness or connector.

CHECK REAR HEATED SEAT SWITCH LH GROUND CIRCUIT (OPEN)

  1. Power switch OFF.

  2. Check continuity between rear heated seat switch LH harness connector and ground.

    Rear heated seat switch LH ー Continuity
    Connector Terminal
    M209 7 Ground Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair the harness or connector.

CHECK REAR HEATED SEAT SWITCH LH

Check rear heated seat switch LH. Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 6.

NO>>

Replace rear heated seat switch LH. Refer to Removal and Installation.

REPLACE A/C CONTROL

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

  2. Reconnect all connectors.

  3. Set the Nissan Ariya vehicle to READY.

  4. Check that rear heated seat switch LH indicator (Low, Mid, High) turns ON when operating rear heated seat switch LH.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

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

Component Inspection

CHECK REAR HEATED SEAT SWITCH LH

  1. Power switch OFF.

  2. Disconnect rear heated sseat switch LH connector.

  3. Check continuity between rear heated seat switch LH terminals.

    Rear heated seat switch LH Condition Continuity
    Terminal
    5 7 Rear heated seat switch LH Pressed Existed
    Not pressed Not existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace rear heated seat switch LH. Refer to Removal and Installation.

Rear Heated Seat Switch Indicator Lh

Component Function Check

CHECK REAR HEATED SEAT SWITCH LH FUNCTION

  1. Set the Nissan Ariya vehicle to READY.

  2. Check that rear heated seat switch LH indicator (Low, Mid, High) turns ON when operating rear heated seat switch LH.

Is the inspection result normal?

YES>>

Rear heated seat switch LH is OK.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK FUSE

  1. Power switch OFF.

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

Signal name Fuse No.
Rear heated seat switch LH indicator power supply 8 (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 REAR HEATED SEAT SWITCH LH INDICATOR POWER SUPPLY VOLTAGE

  1. Disconnect rear heated seat switch LH connector.

  2. Power switch ON.

  3. Check voltage between rear heated seat switch LH harness connector and ground.

    + - Voltage
    Rear heated seat switch LH
    Connector Terminal
    M209 1 Ground Battery voltage

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair the rear heated seat switch LH indicator power supply circuit.

CHECK REAR HEATED SEAT SWITCH LH INDICATOR SIGNAL VOLTAGE

  1. Power switch OFF.

  2. Reconnect rear heated seat switch LH connector.

  3. Disconnect A/C control connector.

  4. Power switch ON.

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

    + - Voltage
    A/C control
    Connector Terminal
    M69 9 Ground Battery voltage
    10
    11

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

GO TO 4.

CHECK REAR HEATED SEAT SWITCH LH INDICATOR SIGNAL CIRCUIT (OPEN)

  1. Power switch OFF.

  2. Disconnect rear heated seat switch LH connector.

  3. Check continuity between rear heated seat switch LH harness connector and A/C control harness connector.

    Rear heated seat switch LH A/C control Continuity
    Connector Terminal Connector Terminal
    M209 2 M69 9 Existed
    3 10
    4 11

Is the inspection result normal?

YES>>

Replace rear heated seat switch LH. Refer to Removal and Installation.

NO>>

Repair the harness or connector.

REPLACE A/C CONTROL

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

  2. Reconnect all connectors.

  3. Set the Nissan Ariya vehicle to READY.

  4. Check that rear heated seat switch LH indicator (Low, Mid, High) turns ON when operating rear heated seat switch LH.

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

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

Seat Blower Motor Lh

Component Function Check

CHECK SEAT BLOWER MOTOR LH FUNCTION

  1. Power switch ON.

  2. Operate the front ventilation seat switch LH, and check that the seat cushion blower motor LH and seatback blower motor LH operates.

Is the inspection result normal?

YES>>

Seat blower motor LH is OK.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK SEATBACK BLOWER MOTOR LH POWER SUPPLY

  1. Power switch OFF.

  2. Disconnect seatback blower motor LH connector.

  3. Power switch ON.

  4. Check voltage between seatback blower motor LH harness connector and ground.

    + - Condition

    Voltage

    (Approx.)
    Seatback blower motor LH
    Connector Terminal
    B722 1 Ground Front ventilation seat switch LH Low 13 V
    Mid
    High
    OFF 0 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace seat cushion pad. Refer to Disassembly & Assembly.

CHECK SEATBACK BLOWER MOTOR LH GROUND CIRCUIT (OPEN)

  1. Power switch OFF.

  2. Disconnect front seat heater LH connector.

  3. Check continuity between seatback blower motor LH harness connector and front seat heater LH terminal.

    Seatback blower motor LH Front seat heater LH Continuity
    Connector Terminal Terminal
    B722 3 4 Existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Replace seat cushion pad. Refer to Disassembly & Assembly.

CHECK SEATBACK BLOWER MOTOR LH SPEED CONTROL SIGNAL VOLTAGE

  1. Connect front seat heater LH connector.

  2. Power switch ON.

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

    + - Condition

    Voltage

    (Approx.)
    Seatback blower motor LH
    Connector Terminal
    B723 2 Ground Front ventilation seat switch LH Low 7.5 V
    Mid 10.0 V
    High 12.5 V
    OFF 0 V

Is the inspection result normal?

YES>>

Replace seatback blower motor. Refer to Removal and Installation.

NO>>

Replace seat cushion pad. Refer to Disassembly & Assembly.

 
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Nissan Ariya (FE0) 2023-2025 Service & Repair Manual

Dtc/circuit Diagnosis

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