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Home >> Infiniti >> 2013 >> M56 Base >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Door & Lock >> DTC/Circuit Diagnosis >> Trunk Lid Open Signal Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. INSPECTION START 

    Check that which circuit is malfunctioning. Refer to "COMPONENT FUNCTION CHECK ".

    Which circuit is malfunctioning? 

    Output signal circuit: GO TO 2.

    Input signal circuit: GO TO  4.

  2. CHECK TRUNK LID OPEN REQUEST SIGNAL 
    1. Turn ignition switch ON.
    2. Select "TRUNK/BACK DOOR" in "Active Test" mode of "INTELLIGENT KEY" of "BCM" using CONSULT.
    3. Check voltage between trunk closure assembly harness connector and ground when touching "OPEN".
      (+) (-) CONSULT Active Test condition Voltage (V) (Approx.)
      Trunk closure assembly
      Connector Terminal
      T14 1 Ground TRUNK/GLASS HATCH OPEN 0 → 12 → 0

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 3.

  3. CHECK TRUNK LID OPEN REQUEST SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect negative battery cable.
    3. Disconnect BCM connector.
    4. Disconnect trunk closure assembly harness connector.
    5. Check continuity between BCM harness connector and trunk closure assembly harness connector.
      BCM Trunk closure assembly Continuity
      Connector Terminal Connector Terminal
      M121 53 T14 1 Existed
    6. Check continuity between BCM harness connector and ground.
      BCM Ground Continuity
      Connector Terminal
      M121 53 Not existed

      Is the inspection result normal? 

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

      NO: Repair harness or connector.

  4. CHECK TRUNK LID OPEN/CLOSE STATUS SIGNAL 
    1. Check voltage between BCM harness connector and ground under the following conditions.
      (+) (-) Condition Voltage (V) (Approx.)
      BCM
      Connector Terminal
      M121 42 Ground Trunk lid Open 0
      Closed 12

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 5.

  5. CHECK TRUNK LID OPEN/CLOSE STATUS SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect negative battery cable.
    3. Disconnect BCM connector.
    4. Disconnect trunk closure assembly harness connector.
    5. Check continuity between BCM harness connector and trunk closure assembly harness connector.
      BCM Trunk closure assembly Continuity
      Connector Terminal Connector Terminal
      M121 42 T14 5 Existed
    6. Check continuity between BCM harness connector and ground.
      BCM Ground Continuity
      Connector Terminal
      M121 42 Not existed

      Is the inspection result normal? 

      YES: Replace trunk closure assembly. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair harness or connector.

  6. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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