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Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> Electrical >> Body Electrical >> Power Control System (Power Distribution System) (DTC/Circuit Diagnosis) >> DTC/Circuit Diagnosis >> Push-Button Ignition Switch >> Diagnosis Procedure
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Diagnosis Procedure

  1. CHECK PUSH-BUTTON IGNITION SWITCH OPERATION

    Press Push-Button Ignition Switch and check if it turns ON.

    Does Ignition Switch turn ON?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 4  .

  2. CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)

    1. Disconnect Push-Button Ignition Switch connector and BCM connector.
    2. Check voltage between IPDM E/R Harness Connector and ground.
      (+) (-) Voltage (V)
      (Approx.)
      IPDM E/R
      Connector Terminal
      E5 28 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Replace IPDM E/R. Refer to REMOVAL AND INSTALLATION .

  3. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)

    1. Disconnect IPDM E/R connector.
    2. Check continuity between IPDM E/R Harness Connector and Push-Button Ignition Switch Harness Connector.
      IPDM E/R Push-Button Ignition Switch Continuity
      Connector Terminal Connector Terminal
      E5 28 M50 4 Existed
    3. Check continuity between IPDM E/R Harness Connector and ground.
      IPDM E/R Ground Continuity
      Connector Terminal
      E5 28 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair or replace harness.

  4. CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM)

    1. Disconnect Push-Button Ignition Switch connector and IPDM E/R connector.
    2. Check voltage between BCM Harness Connector and ground.
      (+) (-) Voltage (V)
      (Approx.)
      BCM
      Connector Terminal
      M121 60 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Replace BCM. Refer to REMOVAL AND INSTALLATION .

  5. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)

    1. Disconnect BCM connector.
    2. Check continuity between BCM Harness Connector and Push-Button Ignition Switch Harness Connector.
      BCM Push-Button Ignition Switch Continuity
      Connector Terminal Connector Terminal
      M121 60 M50 4 Existed
    3. Check continuity between BCM Harness Connector and ground.
      BCM Ground Continuity
      Connector Terminal
      M121 60 Not existed

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair or replace harness.

  6. CHECK PUSH-BUTTON IGNITION SWITCH

    Refer to INTERMITTENT INCIDENT .

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Replace Push-Button Ignition Switch. Refer to REMOVAL AND INSTALLATION .

  7. CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT

    Check continuity between Push-Button Ignition Switch and ground.

    Push-Button Ignition Switch  
    Ground    		 Continuity
    Connector Terminal
    M50 1 Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair or replace harness.

  8. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    INSPECTION END

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