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Home >> Infiniti >> 2015 >> QX80 Base, AWD >> Repair and Diagnosis >> Body & Frame >> Exterior Body Panels >> Door & Lock (Diagnostic Trouble Codes (DTCS), Symptom Tests And R & I) >> DTC/Circuit Diagnosis >> Back Door Closure Motor >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK BACK DOOR CLOSURE MOTOR INPUT SIGNAL

    1. Turn ignition switch OFF.
    2. Disconnect back door lock assembly connector.
    3. Check voltage between back door lock assembly harness connector and ground.
      (+) (-) Condition Voltage
      (Approx.)
      Back door lock assembly
      Connector Terminal
      D157 1 Ground Back door opener switch Pressed Battery voltage
      2 Released 0 V

    Is the inspection result normal?

    YES 

    Replace back door lock assembly.

    NO 

    GO TO STEP 2  .

  2. CHECK BACK DOOR CLOSURE MOTOR CIRCUIT

    1. Disconnect automatic back door control module connector.
    2. Check continuity between automatic back door control module harness connector and back door lock assembly harness connector.
      Automatic back door control module Back door lock assembly Continuity
      Connector Terminal Connector Terminal
      B26 11 D157 1 Existed
      12 2
    3. Check continuity between automatic back door control module harness connector and ground.
      Automatic back door control module Ground Continuity
      Connector Terminal
      B26 11 Not existed
      12

    Is the inspection result normal?

    YES 

    Replace automatic back door control module. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.