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Home >> Infiniti >> 2011 >> M56 Base >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Door And Lock -- M37/M56 >> DTC/Circuit Diagnosis >> Trunk Room Lamp Switch >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK TRUNK ROOM LAMP SWITCH INPUT SIGNAL
    1. Turn ignition switch OFF.
    2. Disconnect trunk lid lock assembly.
    3. Check signal between trunk lid lock assembly harness connector and ground using oscilloscope.
      SIGNAL REFERENCE

      (+) (-) Signal (Reference value)
      Trunk lid lock assembly
      Connector Terminal
      T3 1 Ground
      G04878585Courtesy of NISSAN MOTOR CO., U.S.A.

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 2.

  2. CHECK TRUNK ROOM LAMP SWITCH CIRCUIT
    1. Disconnect BCM connector.
    2. Check continuity between BCM connector and trunk lid lock assembly connector.
      CONTINUITY REFERENCE

      BCM Trunk lid lock assembly Continuity
      Connector Terminal Connector Terminal
      M121 42 T3 1 Existed
    3. Check continuity between BCM connector and ground.
      CONTINUITY REFERENCE

      BCM Ground Continuity
      Connector Terminal
      M121 42 Not existed

      Is the inspection result normal? 

      YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

  3. CHECK TRUNK ROOM LAMP SWITCH GROUND CIRCUIT

    Check continuity between trunk lid lock assembly connector and ground.

    CONTINUITY REFERENCE

    Trunk lid lock assembly Ground Continuity
    Connector Terminal
    T3 2 Existed

    Is the inspection result normal? 

    YES: GO TO 4.

    NO: Repair or replace harness.

  4. CHECK TRUNK ROOM LAMP SWITCH

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 5.

    NO: Replace trunk lid lock assembly.

  5. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END