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Nissan Sentra B18 (2020-2025) Service Manual: Diagnosis Procedure

Nissan Sentra B18 (2020-2025) Service Manual / Driver Controls / Interior Lighting System :: Dtc/circuit Diagnosis / Interior Room Lamp Power Supply Circuit / Diagnosis Procedure

Diagnosis Procedure

  1. CHECK INTERIOR ROOM LAMP POWER SUPPLY CIRCUIT

      1. Ignition switch OFF.

      2. Disconnect the following connectors:

        • Room lamp relay connector.

        • Front room/map lamp assembly

        • Rear personal lamp

        • Trunk room lamp

        • Vanity mirror lamp LH

        • Vanity mirror lamp RH

      3. Check continuity between room lamp relay harness connector and each interior room lamp harness connector.

        Room lamp relay

        Interior room lamp

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        J-2

        5

        Front room/map lamp assembly

        R3

        8

        Yes

        Rear personal lamp

        R103

        1

        Trunk room lamp

        B78

        1

        Vanity mirror lamp LH

        R104

        2

        Vanity mirror lamp RH

        R105

      4. Check continuity between room lamp relay harness connector and ground.

        Room lamp relay

        —

        Continuity

        Connector

        Terminal

        J-2

        5

        Ground

        No

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Repair or replace harnesses.

  2. CHECK INTERIOR ROOM LAMP GROUND CIRCUIT

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

      Interior room lamp

      —

      Continuity

      Connector

      Terminal

      Front room/map lamp assembly

      R3

      7

      Ground

      Yes

      Rear personal lamp

      R103

      2

    Is the inspection result normal?

    YES>>

    Refer to Intermittent Incident.

    NO>>

    Repair or replace harnesses.

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Component Function Check Note: Before performing the diagnosis, check that the following items are normal: Interior room lamp battery saver output circuit ...

Interior Room Lamp Control Circuit
...

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