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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Door Lock (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> Fuel Lid Lock Actuator >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUEL LID LOCK ACTUATOR INPUT SIGNAL 
    1. Turn Ignition Switch OFF.
    2. Disconnect Fuel Lid Lock Actuator.
    3. Check voltage between Fuel Lid Lock Actuator harness connector and ground.

    (+)

    (-)

    Condition

    Voltage

    (Approx.)

    Fuel Lid Lock Actuator

    Connector

    Terminal

    B242

    1

    Ground

    Door lock and unlock switch

    Unlock

    12 V

    2

    Lock

    Is the inspection result normal?

    YES

    Replace Fuel Lid Lock Actuator.

    NO

    GO TO 2.

  2. CHECK FUEL LID LOCK ACTUATOR CIRCUIT 
    1. Disconnect BCM connector.
    2. Check continuity between BCM harness connector and all Door Lock Actuator harness connector.

      BCM

      Fuel Lid Lock Actuator

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M122

      65

      B242

      2

      Existed

      66

      1

    3. Check continuity between BCM harness connector and ground.

      BCM

      Ground

      Continuity

      Connector

      Terminal

      M122

      65

      Not existed

      66

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    Repair or replace harness.

  3. CHECK BCM OUTPUT SIGNAL 
    1. Connect BCM connector.
    2. Check voltage between BCM harness connector and ground.

    (+)

    (-)

    Condition

    Voltage

    (Approx.)

    BCM

    Connector

    Terminal

    M122

    65

    Ground

    Door lock and unlock switch

    Lock

    12 V

    66

    Unlock

    Is the inspection result normal?

    YES

    Check for internal short of each Door Lock Actuator.

    NO

    Replace BCM. Refer to Removal and Installation .