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Home >> Infiniti >> 2015 >> QX80 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Control System >> DTC/Circuit Diagnosis >> Combination Switch Output Circuit >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK OUTPUT 1 - 5 CIRCUIT FOR OPEN

    1. Turn ignition switch OFF.
    2. Disconnect BCM and combination switch connectors.
    3. Check continuity between BCM harness connector and combination switch harness connector.
      System BCM Combination switch Continuity
      Connector Terminal Connector Terminal
      OUTPUT 1 M68 36 M27 11 Existed
      OUTPUT 2 35 9
      OUTPUT 3 34 7
      OUTPUT 4 33 10
      OUTPUT 5 32 13

    Does continuity exist?

    YES 

    GO TO STEP 2. 

    NO 

    Repair harnesses or connectors.

  2. CHECK OUTPUT 1 - 5 CIRCUIT FOR SHORT

    Check for continuity between BCM harness connector and ground.

    System BCM Ground Continuity
    Connector Terminal
    OUTPUT 1 M68 36 Not existed
    OUTPUT 2 35
    OUTPUT 3 34
    OUTPUT 4 33
    OUTPUT 5 32

    Does continuity exist?

    YES 

    Repair harnesses or connectors.

    NO 

    GO TO STEP 3. 

  3. CHECK BCM OUTPUT VOLTAGE

    1. Connect BCM connector.
    2. Check voltage between BCM harness connector and ground.
      System Terminals Voltage
      (Approx.)
      (+) (-)
      BCM Ground
      Connector Terminal
      OUTPUT 1 M68 36  
      G04078527Courtesy of NISSAN NORTH AMERICA, INC.

      7.0 - 8.0 V
      OUTPUT 2 35
      OUTPUT 3 34
      OUTPUT 4 33
      OUTPUT 5 32

    Is the measurement value normal?

    YES 

    Replace combination switch.

    NO 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

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