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Home >> Infiniti >> 2015 >> QX80 Base, AWD >> Repair and Diagnosis >> Electrical >> Body Electrical >> Power Control System (Power Distribution System) >> DTC/Circuit Diagnosis >> Push-Button Ignition Switch Position Indicator >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL

    1. Turn ignition switch OFF.
    2. Disconnect push-button ignition switch connector.
    3. Check voltage between push-button ignition switch harness connector and ground.
      (+) (-) Voltage (V)
      (Approx.)
      Push-button ignition switch
      Connector Terminal
      M101 8 Ground Battery voltage

    Is the inspection normal?

    YES 

    GO TO STEP 2  .

    NO-1 

    Check 10 A fuse [No. 10, located in fuse block (J/B)].

    NO-2 

    Check harness for open or short between push-button ignition switch and fuse.

  2. CHECK BCM INPUT

    1. Connect push-button ignition switch connector.
    2. Disconnect BCM connector.
    3. Check voltage between BCM connector and ground.
      (+) (-) Voltage (V)
      (Approx.)
      BCM
      Connector Terminal
      M101 73 Ground Battery voltage
      91
      109

    Is the inspection normal?

    YES 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 3  .

  3. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT

    1. Disconnect push-button ignition switch connector.
    2. Check continuity between BCM harness connector and push-button ignition switch harness connector.
      Indicator BCM Push-button ignition switch Continuity
      Connector Terminal Connector Terminal
      LOCK M71 91 M101 5 Existed
      ACC 109 6
      ON 73 7
    3. Check continuity between BCM harness connector and ground.
      Indicator BCM Ground Continuity
      Connector Terminal
      LOCK M71 91 Not existed
      ACC 109
      ON 73

    Is the inspection normal?

    YES 

    Replace push-button ignition switch.

    NO 

    Repair or replace harness.