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Home >> Infiniti >> 2017 >> QX50 RWD >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System >> Circuit Diagnosis >> Power Supply And Ground Circuit >> BCM >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSE AND FUSIBLE LINK

    Check that the following fuse and fusible link are not blown.

    Terminal No. Signal name Fuse and fusible link No.
    1 Battery power supply K (40 A)
    11 10 (10 A)

    Is the fuse fusing?

    YES 

    Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is blown.

    NO 

    GO TO STEP 2  .

  2. CHECK POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect BCM connectors.
    3. Check voltage between BCM harness connector and ground.
      (+) (-) Voltage
      (Approx.)
      BCM
      Connector Terminal
      M118 1 Ground Battery voltage
      M119 11

    Is the measurement value normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair harness or connector.

  3. CHECK GROUND CIRCUIT

    Check continuity between BCM harness connector and ground.

    BCM Ground Continuity
    Connector Terminal
    M119 13 Existed

    Does continuity exist?

    YES 

    INSPECTION END

    NO 

    Repair harness or connector.

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