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Home >> Infiniti >> 2013 >> G37 Base >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Door & Lock (Convertible) >> 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 room lamp switch connector.
    3. Check signal between trunk room lamp switch harness connector and ground using oscilloscope.
      (+) (-) Signal (Reference value)
      Trunk room lamp switch
      Connector Terminal
      B306 2 Ground
      G04888175

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 2.

  2. CHECK TRUNK ROOM LAMP SWITCH CIRCUIT 
    1. Disconnect BCM connector, trunk closure control unit connector and retractable hard top control unit connector.
    2. Check continuity between BCM harness connector and trunk room lamp switch harness connector.
      BCM Trunk room lamp switch Continuity
      Connector Terminal Connector Terminal
      M121 50 B306 2 Existed
    3. Check continuity between BCM harness connector and ground.
      BCM Ground Continuity
      Connector Terminal
      M121 50 Not existed

      Is the inspection result normal? 

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

      NO: Repair harness or connector.

  3. CHECK TRUNK ROOM LAMP SWITCH GROUND CIRCUIT 
    1. Disconnect trunk lid opener actuator connector.
    2. Check continuity between retractable hard top control unit harness connector and trunk room lamp switch harness connector.
      Retractable hard top control unit Trunk room lamp switch Continuity
      Connector Terminal Connector Terminal
      B83 52 B306 1 Existed
    3. Check continuity between retractable hard top control unit harness connector and ground.
      Retractable hard top control unit Ground Continuity
      Connector Terminal
      B83 52 Not existed

      Is the inspection result normal? 

      YES: GO TO 4.

      NO: Repair or replace harness.

  4. CHECK RETRACTABLE HARD TOP CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT 

    Refer to "RETRACTABLE HARD TOP CONTROL UNIT: DIAGNOSIS PROCEDURE ".

    Is the inspection result normal? 

    YES: GO TO 5.

    NO: Repair or replace the malfunctioning parts.

  5. CHECK TRUNK ROOM LAMP SWITCH GROUND 
    1. Connect retractable hard top control unit connector.
    2. Check continuity between retractable hard top control unit harness connector and ground.
      Retractable hard top control unit Ground Continuity
      Connector Terminal
      B83 52 Existed

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Replace retractable hard top control unit. Refer to "REMOVAL AND INSTALLATION ".

  6. CHECK TRUNK ROOM LAMP SWITCH 

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 7.

    NO: Replace trunk room lamp switch (trunk lid lock assembly). Refer to "TRUNK LID LOCK: REMOVAL AND INSTALLATION ".

  7. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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