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Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OUTPUT

    WITH CONSULT

    1. Turn ignition switch ON.
    2. Select "BATTERY SAVER" of BCM (BATTERY SAVER) active test item.
    3. While operating the test item, check voltage between BCM connector M20 terminal 56 and ground.
      (+) (-) Test item Voltage
      Connector Terminal BATTERY SAVER
      M20 56 Ground OFF 0V
      ON Battery voltage
    Fig 1: Checking Voltage Between BCM Connector M20 Terminal 56 And Ground
    G05382656Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal? 

    YES: GO TO 2

    NO: Replace BCM after making sure battery saver output/power supply circuit is not shorted to voltage. Refer to "REMOVAL AND INSTALLATION ".

  2. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY OPEN CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect the following connectors.
      • BCM M20
      • Ignition keyhole illumination
      • Front room/map lamp assembly
      • Vanity lamp LH (if equipped)
      • Vanity lamp RH (if equipped)
      • Cargo lamp
      • Personal lamp 2nd row (with personal lamp 2nd row)
      • Room lamp 2nd row (without personal lamp 2nd row)
    3. Check continuity between BCM connector and each interior room lamp connector.
      BCM Each interior room lamp Continuity
      Connector Terminal Connector Terminal
      M20 56 Ignition keyhole illumination M150 1 Yes
      Front room/map lamp assembly R9 1
      Vanity lamp LH (if equipped) B80 1
      Vanity lamp RH (if equipped) B81 1
      Cargo lamp R11 2
      Personal lamp 2nd row (with personal lamp 2nd row) R10 1
      Room lamp 2nd row (without personal lamp 2nd row) R12 2

    Is the inspection result normal? 

    YES: GO TO 3

    NO: Repair the harness or connectors.

  3. CHECK BATTERY SAVER OUTPUT/POWER SUPPLY SHORT CIRCUIT

    Check continuity between BCM connector M20 terminal 56 and ground.

    Connector Terminal - Continuity
    M20 56 Ground No
    Fig 2: Checking Continuity Between BCM Connector M20 Terminal 56 And Ground
    G05382657Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal? 

    YES: Check that each interior room lamp has no internal short circuit.

    NO: Repair the harness or connectors.

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