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Nissan Ariya: Dtc/circuit Diagnosis

Nissan Ariya (FE0) 2023-2025 Service & Repair Manual / Driver Controls / Interior Lighting System / Dtc/circuit Diagnosis

B2c76-04 Ambient Light 1

DTC Description

DTC DETECTION LOGIC

DTC No. CONSULT screen terms DTC detection condition
B2C76-04 Ambient light 1 Diagnosis condition Power switch ON
Signal (terminal) Advanced ambient light signal
Threshold Detected advanced ambient light signal error
Diagnosis delay time 1 second or less

POSSIBLE CAUSE

  • Harness or connector

  • Advanced ambient light (instrument upper RH)

  • BCM

FAIL SAFE

Advanced ambient light (instrument upper RH) OFF or dimmed lighting.

DTC CONFIRMATION PROCEDURE

PERFORM DTC CONFIRMATION PROCEDURE

With CONSULT

  1. Power switch ON.

  2. Set the brightness to 100% with Nissan Ariya vehicle setting "Ambient Lighting" of combination meter.

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

Is malfunctioning part 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 SELF-DIAGNOSIS RESULT 1

With CONSULT

  1. Power switch ON.

  2. Set the brightness to 0% with Nissan Ariya vehicle setting "Ambient Lighting" of combination meter.

  3. Move the vehicle into the shade and wait 10 minutes.

  4. Set the brightness to 100% with Nissan Ariya vehicle setting "Ambient Lighting" of combination meter.

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

Is DTC B2C76-04 detected?

YES>>

GO TO 2.

NO>>

INSPECTION END

CHECK SELF-DIAGNOSIS RESULT 2

With CONSULT

Select “Self Diagnostic Result” mode of “BCM” using CONSULT.

Are the DTC B2C77-04, B2C78-04, and B2C79-04 detecting?

YES-1>>

All of the above DTCs are detected.: Perform diagnosis of DTC U1C03-08. Refer to DTC Description.

YES-2>>

Any of the above DTCs is detected.: After performing diagnosis of DTC B2C76-04, perform the diagnosis of the detected DTC. GO TO 3 .

NO>>

All of the above DTCs are not detected.: GO TO 3.

CHECK ADVANCED AMBIENT LIGHT POWER SUPPLY CIRCUIT

  1. Power switch OFF.

  2. Disconnect fuse block (J/B) connector and advanced ambient light (instrument upper RH) connector.

  3. Check continuity between fuse block (J/B) harness connector and advanced ambient light (instrument upper RH) harness connector.

    Fuse block (J/B) Advanced ambient light (instrument upper RH) Continuity
    Connector Terminal Connector Terminal
    M74 93 M77 1 Existed

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness.

CHECK ADVANCED AMBIENT LIGHT GROUND CIRCUIT

Check continuity between advanced ambient light (instrument upper RH) harness connector and ground.

Advanced ambient light (instrument upper RH) — Continuity
Connector Terminal
M77 4 Ground Existed

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Repair or replace harness.

CHECK ADVANCED AMBIENT LIGHT SIGNAL CIRCUIT

  1. Disconnect BCM connector.

  2. Check continuity between BCM harness connector and advanced ambient light (instrument upper RH) harness connector.

    BCM Advanced ambient light (instrument upper RH) Continuity
    Connector Terminal Connector Terminal
    M8 3 M77 2 Existed

Is the inspection result normal?

YES>>

Replace advanced ambient light (instrument upper RH). Refer to Replacement.

NO>>

Repair or replace harness.

Interior Room Lamp Power Supply Circuit

Diagnosis Procedure

CHECK SYMPTOM

Check symptom (A or B).

A

All the following lamps do not turn ON.

  • Map lamp

  • Personal lamp

  • Accent light

  • Advanced ambient light

  • Luggage room lamp

  • Glove box lamp

  • Center box lamp

  • Flexible center storage lamp

  • Vanity mirror lamp
B Interior room lamp battery saver does not activate.

A>>

GO TO 2.

B>>

GO TO 8.

CHECK FUSE

  1. Power switch OFF.

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

    Location Fuse No. Capacity
    Fuse block (J/B) 30 10 A

Is the fuse blown (open)?

YES>>

Replace the blown (open) fuse after repairing the cause of blown (open).

NO>>

GO TO 3.

CHECK INTERIOR ROOM LAMP POWER SUPPLY

  1. Remove interior room lamp relay.

  2. Check voltage between interior room lamp relay harness connector and ground.

    (+) (-) Voltage
    Interior room lamp relay
    Terminal
    Coil upstream side Ground Battery voltage
    Switch upstream side

Is the inspection result normal?

YES>>

GO TO 4.

NO>>

Repair or replace harness

CHECK INTERIOR ROOM LAMP RELAY 1

Check interior room lamp relay. Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 5.

NO>>

Replace interior room lamp relay.

CHECK INTERIOR ROOM LAMP RELAY CONTROL CIRCUIT 1

With CONSULT

  1. Install interior room lamp relay.

  2. Power switch ON.

  3. Select “Interior lamp” of "BCM (INT LAMP)" active test item.

  4. With operating the test items, check voltage between BCM harness connector and ground.

    (+) (–) Condition Voltage
    BCM
    Connector Terminal
    M8 37 Ground Interior lamp ON 0 – 1 V
    OFF 9 – 16 V

Is the inspection result normal?

YES>>

GO TO 7.

NO-1>>

Continuity exists and remains unchanged: GO TO 6.

NO-2>>

Continuity does not exist and remains unchanged: Replace BCM. Refer to Removal and Installation.

CHECK INTERIOR ROOM LAMP RELAY CONTROL CIRCUIT 2

  1. Power switch OFF.

  2. Disconnect BCM connector and fuse block (J/B) connector.

  3. Check continuity between BCM harness connector and fuse block (J/B) harness connector.

    BCM Fuse block (J/B) Continuity
    Connector Terminal Connector Terminal
    M8 37 M72 126 Existed

Is the inspection result normal?

YES>>

Replace fuse block (J/B).

NO>>

Repair or replace harness.

CHECK INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT

  1. Power switch OFF.

  2. Disconnect fuse block (J/B) connector and map lamp connector.

  3. Check continuity between fuse block (J/B) harness connector and map lamp harness connector.

    Fuse block (J/B) Map lamp Continuity
    Connector Terminal Connector Terminal
    M74 93 R9 1 Existed

Is the inspection result normal?

YES>>

Replace fuse block (J/B).

NO>>

Repair or replace harness.

CHECK INTERIOR ROOM LAMP RELAY 2

Check interior room lamp relay. Refer to Component Inspection.

Is the inspection result normal?

YES>>

GO TO 9.

NO>>

Replace interior room lamp relay.

CHECK INTERIOR ROOM LAMP RELAY CONTROL CIRCUIT 3

  1. Power switch OFF.

  2. Remove interior room lamp relay.

  3. Disconnect BCM connector.

  4. Check continuity between BCM harness connector and ground.

    BCM — Continuity
    Connector Terminal
    M8 37 Ground Not existed

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Repair or replace harnesses.

Component Inspection

CHECK INTERIOR ROOM LAMP RELAY

  1. Power switch OFF.

  2. Remove interior room lamp relay.

  3. Check continuity between interior room lamp relay terminals.

    Interior room lamp relay Condition Continuity
    Terminal
    12 V direct current supply between terminals and . Existed
    No current supply Not existed

Is the inspection result normal?

YES>>

INSPECTION END

NO>>

Replace interior room lamp relay.

Interior Room Lamp Circuit

Diagnosis Procedure

CHECK INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT

  1. Power switch OFF.

  2. Disconnect following connectors.

    • Fuse block (J/B)

    • Map lamp

    • Personal lamp

    • Vanity mirror lamp

    • Glove box lamp

    • Center box lamp

    • Flexible center storage lamp

  3. Check continuity between fuse block (J/B) harness connector and each interior room lamp harness connector.

    Fuse block (J/B) Each interior room lamp Continuity
    Connector Terminal Connector Terminal
    M74 93 Map lamp R9 8 Existed
    Personal lamp RH R33 1
    Personal lamp LH R8
    Vanity mirror lamp RH R11 2
    Vanity mirror lamp LH R10
    Glove box lamp M59 1
    Center box lamp M168 10
    Flexible center storage lamp M623 1

Is the inspection result normal?

YES-1>>

Except flexible center storage lamp: GO TO 2.

YES-2>>

Flexible center storage lamp: GO TO 3.

NO>>

Repair or replace harnesses.

CHECK INTERIOR ROOM LAMP GROUND CIRCUIT 1

Check continuity between each interior room lamp harness connector and ground.

Each interior room lamp — Continuity
Connector Terminal
Map lamp R9 4 Ground Existed
Personal lamp RH R33 4
Personal lamp LH R8
Vanity mirror lamp RH R11 3
Vanity mirror lamp LH R10
Glove box lamp M59 4
Center box lamp M168 5

Is the inspection result normal?

YES-1>>

Map lamp: Replace map lamp. Refer to Removal & Installation.

YES-2>>

Personal lamp: Replace corresponding personal lamp. Refer to Removal & Installation.

YES-3>>

Vanity mirror lamp: Replace corresponding vanity mirror lamp. Refer to Removal & Installation.

YES-4>>

Glove box lamp: Replace glove box lamp. Refer to Replacement.

YES-5>>

Center box lamp. Replace center box lamp. Refer to Replacement.

NO>>

Repair or replace harnesses.

CHECK INTERIOR ROOM LAMP GROUND CIRCUIT 2

  1. Disconnect flexible center storage control module connector.

  2. Check continuity between flexible center storage lamp harness connector and flexible center storage control module harness connector.

    Flexible center storage lamp Flexible center storage control module Continuity
    Connector Terminal Connector Terminal
    M623 2 M621 12 Existed

Is the inspection result normal?

YES>>

Replace flexible center storage lamp. Refer to Replacement.

NO>>

Repair or replace harness.

Interior Room Lamp Control Circuit

Component Function Check

CHECK MAP LAMP OPERATION

With CONSULT

  1. Turn map lamp door link switch ON.

  2. Open the front door (driver side).

  3. Power switch ON.

  4. Select “Front lamp” of "BCM (HEAD LAMP)" active test item.

  5. With operating the test items, check that map lamp turns ON/OFF.

    ON : Map lamp turns ON
    OFF : Map lamp turns OFF

Does the map lamp turns ON/OFF?

YES>>

Interior room lamp control circuit is normal.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK INTERIOR ROOM LAMP CONTROL SIGNAL CIRCUIT 1

With CONSULT

  1. Power switch OFF.

  2. Disconnect map lamp connector.

  3. Power switch ON.

  4. Select "Front lamp" of "BCM (HEAD LAMP)" active test.

  5. With operating the test item, check continuity BCM harness connector and ground.

    BCM — Test item Continuity
    Connector Terminal
    B14 130 Ground Front lamp ON Existed
    OFF Not existed

Is the inspection result normal?

YES>>

GO TO 2.

NO-1>>

Continuity exists and remains unchanged: GO TO 3.

NO-2>>

Continuity does not exist and remains unchanged: Replace BCM. Refer to Removal and Installation.

CHECK INTERIOR ROOM LAMP CONTROL SIGNAL CIRCUIT 2

  1. Power switch OFF.

  2. Disconnect BCM connector.

  3. Check continuity between BCM harness connector and map lamp harness connector.

    BCM Map lamp Continuity
    Connector Terminal Connector Terminal
    B14 130 R9 2 Existed

Is the inspection result normal?

YES>>

Replace map lamp. Refer to Removal & Installation.

NO>>

Repair or replace harnesses.

CHECK INTERIOR ROOM LAMP CONTROL SIGNAL CIRCUIT 3

  1. Power switch OFF.

  2. Disconnect BCM connector.

  3. Check continuity between BCM harness connector and ground.

    BCM — Continuity
    Connector Terminal
    B14 130 Ground Not existed

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Repair or replace harnesses.

Personal Lamp Circuit

Component Function Check

CHECK PERSONAL LAMP OPERATION

  1. Power switch ON.

  2. With operating the map lamp all switch, check that personal lamp turns ON/OFF.

    ON : Personal lamp turns ON
    OFF : Personal lamp turns OFF

Does the personal lamp turns ON/OFF?

YES>>

Personal lamp circuit is normal.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK MAP LAMP OUTPUT

  1. Power switch ON.

  2. Turn map lamp all switch ON.

  3. Check voltage between map lamp harness connector and ground.

    (+) (-) Voltage
    Map lamp
    Connector Terminal
    R9 8 Ground 4.5 – 5.5 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace map lamp. Refer to Removal & Installation.

CHECK MAP LAMP OUTPUT CIRCUIT

  1. Power switch OFF.

  2. Turn map lamp all switch OFF.

  3. Disconnect map lamp connector and personal lamp connector.

  4. Check continuity between map lamp harness connector and personal lamp harness connector.

    Map lamp Personal lamp Continuity
    Connector Terminal Connector Terminal
    R9 8 RH R33 2 Existed
    LH R8

Is the inspection result normal?

YES>>

Replace corresponding personal lamp. Refer to Removal & Installation.

NO>>

Repair or replace harnesses.

Accent Lighting Control Circuit

Component Function Check

CHECK ACCENT LIGHT OPERATION

With operating the front door (driver side), check that accent light turns ON/OFF.

OPEN : Accent light turns ON
CLOSE : Accent light turns OFF

Does the accent light turns ON/OFF?

YES>>

Accent lighting control circuit is normal.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK ACCENT LIGHT POWER SUPPLY CIRCUIT

  1. Power switch OFF.

  2. Disconnect fuse block (J/B) connector and accent light connector.

  3. Check continuity between fuse block (J/B) harness connector and accent light harness connector.

    Fuse block (J/B) Accent light Continuity
    Connector Terminal Connector Terminal
    M74 93 Front door RH D10 1 Existed
    Front door LH D50
    Instrument lower M60 1

Is the inspection normal?

YES>>

GO TO 2.

NO>>

Repair or replace harness.

CHECK ACCENT LIGHT CONTROL SIGNAL CIRCUIT 1

Check continuity between BCM harness connector and ground.

BCM — Condition Continuity
Connector Terminal
B15 150 Ground Driver side door Open Existed
Close Not existed

Is the inspection result normal?

YES>>

GO TO 3.

NO-1>>

Continuity exists and remains unchanged: GO TO 4.

NO-2>>

Continuity does not exist and remains unchanged: Replace BCM. Refer to Removal and Installation.

CHECK ACCENT LIGHT CONTROL SIGNAL CIRCUIT 2

  1. Disconnect BCM connector.

  2. Check continuity between BCM harness connector and accent light harness connector.

    BCM Accent light Continuity
    Connector Terminal Connector Terminal
    B15 150 Front door RH D10 4 Existed
    Front door LH D50
    Instrument lower M60 4

Is the inspection result normal?

YES-1>>

Front door: Replace corresponding accent light (front door). Refer to Exploded View.

YES-2>>

Instrument lower: Replace accent light (instrument lower). Refer to Replacement.

NO>>

Repair or replace harnesses.

CHECK ACCENT LIGHT CONTROL SIGNAL CIRCUIT 3

  1. Disconnect BCM connector.

  2. Check continuity between BCM harness connector and ground.

    BCM — Continuity
    Connector Terminal
    B15 150 Ground Not existed

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Repair or replace harnesses.

Luggage Room Lamp Control Circuit

Component Function Check

CHECK LUGGAGE ROOM LAMP OPERATION

With CONSULT

  1. Power switch ON.

  2. Select “Trunk/luggage lamp” of "BCM (TRUNK)" active test item.

  3. With operating the test items, check that luggage room lamp turns ON/OFF.

    ON : Luggage room lamp ON
    OFF : Luggage room lamp OFF

Does luggage room lamp turns ON/OFF?

YES>>

Luggage room lamp control circuit is normal.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK LUGGAGE ROOM LAMP POWER SUPPLY CIRCUIT

  1. Power switch OFF.

  2. Disconnect fuse block (J/B) and luggage room lamp connector.

  3. Check continuity between fuse block (J/B) harness connector and luggage room lamp harness connector.

    Fuse block (J/B) Luggage room lamp Continuity
    Connector Terminal Connector Terminal
    M74 93 RH B134 2 Existed
    LH B133

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Repair or replace harnesses.

CHECK LUGGAGE ROOM LAMP CONTROL SIGNAL

With CONSULT

  1. Connect fuse block (J/B) connector.

  2. Power switch ON.

  3. Select "Trunk/luggage lamp" of "BCM (TRUNK)" active test.

  4. With operating the test item, check continuity BCM harness connector and ground.

    BCM — Test item Continuity
    Connector Terminal
    M8 30 Ground Trunk/luggage lamp ON Existed
    OFF Not existed

Is the inspection result normal?

YES>>

GO TO 3.

NO-1>>

Continuity exists and remains unchanged: GO TO 4.

NO-2>>

Continuity does not exist and remains unchanged: Replace BCM. Refer to Removal and Installation.

CHECK LUGGAGE ROOM LAMP CONTROL SIGNAL CIRCUIT 1

  1. Power switch OFF.

  2. Disconnect BCM connector.

  3. Check continuity between BCM harness connector and luggage room lamp harness connector.

    BCM Luggage room lamp Continuity
    Connector Terminal Connector Terminal
    M8 30 RH B133 3 Existed
    LH B134

Is the inspection result normal?

YES>>

Replace corresponding luggage room lamp. Refer to Removal & Installation.

NO>>

Repair or replace harness.

CHECK LUGGAGE ROOM LAMP CONTROL SIGNAL CIRCUIT 2

  1. Power switch OFF.

  2. Disconnect BCM connector.

  3. Check continuity between BCM harness connector and ground.

    BCM — Continuity
    Connector Terminal
    M8 30 Ground Not existed

Is the inspection result normal?

YES>>

Replace BCM. Refer to Removal and Installation.

NO>>

Repair or replace harness.

Power Switch Illumination Circuit

Diagnosis Procedure

CHECK POWER SWITCH ILLUMINATION POWER SUPPLY

  1. Power switch ON.

  2. Check voltage between Intelligent Key unit harness connector and the ground.

    (+) (-) Condition Voltage
    Intelligent Key unit
    Connector Terminal
    M79 10 Ground Power switch illumination ON

    OFF 0 V

Is the inspection result normal?

YES>>

GO TO 2.

NO>>

Replace Intelligent Key unit. Refer to Removal and Installation.

CHECK POWER SWITCH ILLUMINATION CIRCUIT

  1. Power switch OFF.

  2. Disconnect Intelligent Key unit connector and power switch connector.

  3. Check continuity between Intelligent Key unit harness connector and power switch harness connector.

    Intelligent Key unit Power switch Continuity
    Connector Terminal Connector Terminal
    M79 10 M143 5 Existed

  4. Check continuity between Intelligent Key unit harness connector and ground.

    Intelligent Key unit — Continuity
    Connector Terminal
    M79 10 Ground Not existed

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harnesses.

CHECK POWER SWITCH ILLUMINATION GROUND CIRCUIT

Check continuity between power switch harness connector and ground.

Power switch — Continuity
Connector Terminal
M143 6 Ground Existed

Is the inspection result normal?

YES>>

Replace power switch. Refer to Removal and Installation.

NO>>

Repair or replace harnesses.

Illumination Emblem Circuit

Component Function Check

CHECK ILLUMINATION EMBLEM OPERATION

Check that illumination emblem turns ON/OFF when the Nissan Ariya vehicle is set to READY.

READY : Illumination emblem turns ON
Except READY : Illumination emblem turns OFF

Does the illumination emblem turns ON/OFF?

YES>>

Illumination emblem circuit is normal.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK ILLUMINATION EMBLEM POWER SUPPLY

With set the Nissan Ariya vehicle to READY, check voltage between illumination emblem harness connector and ground.

(+) (-) Condition Voltage
Illumination emblem
Connector Terminal
B138 1 Ground Nissan Ariya Vehicle condition READY 6 – 16 V
Except READY 0 – 1 V

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK ILLUMINATION EMBLEM POWER SUPPLY CIRCUIT

  1. Power switch OFF.

  2. Disconnect IPDM E/R connector and illumination emblem connector.

  3. Check continuity between IPDM E/R harness connector and illumination emblem harness connector.

    IPDM E/R Illumination emblem Continuity
    Connector Terminal Connector Terminal
    E42 56 B138 1 Existed

  4. Check continuity between IPDM E/R harness connector and ground.

    IPDM E/R — Continuity
    Connector Terminal
    E42 56 Ground Not existed

Is the inspection result normal?

YES>>

Replace IPDM E/R. Refer to Removal and Installation.

NO>>

Repair or replace harness.

CHECK ILLUMINATION EMBLEM GROUND CIRCUIT

  1. Power switch OFF.

  2. Disconnect illumination emblem connector.

  3. Check continuity between illumination emblem harness connector and ground.

    Illumination emblem — Continuity
    Connector Terminal
    B138 2 Ground Existed

Is the inspection result normal?

YES>>

Replace illumination emblem. Refer to Replacement.

NO>>

Repair or replace harness.

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

Dtc/circuit Diagnosis

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