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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 >> Power Supply And Ground Circuit >> Rear Door Closure Control Unit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK REAR DOOR CLOSURE CONTROL UNIT POWER SUPPLY 
    1. Turn Ignition Switch OFF.
    2. Disconnect Rear Door Closure Control Unit connector.
    3. Check voltage between Rear Door Closure Control Unit harness connector and ground.

      (+)

      (-)

      Voltage

      (Approx.)

      Rear Door Closure Control Unit

      Connector

      Terminal

      LH

      D65

      6

      Ground

      12 V

      RH

      D85

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 2.

  2. CHECK REAR DOOR CLOSURE CONTROL UNIT CIRCUIT 
    1. Disconnect BCM connector.
    2. Check continuity between BCM harness connector and Trunk Lid Opener Request Switch harness connector.

      BCM

      Rear Door Closure Control Unit

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M122

      69

      LH

      D65

      6

      Existed

      RH

      D85

    3. Check continuity between BCM harness connector and ground.

      BCM

      Ground

      Continuity

      Connector

      Terminal

      M122

      69

      Not existed

    Is the inspection result normal?

    YES

    Replace BCM. Refer to Removal and Installation .

    NO

    Repair or replace harness.

  3. CHECK GROUND CIRCUIT 

    Check continuity between Rear Door Closure Control Unit harness connector and ground.

    Rear Door Closure Control Unit

    Ground

    Continuity

    Connector

    Terminal

    LH

    D65

    2

    Existed

    RH

    D85

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace harness.