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Home >> Infiniti >> 2011 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 107 (Power Control System -- G37 Coupe) >> Power Distribution System >> DTC/Circuit Diagnosis >> Push-Button Ignition Switch >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK PUSH-BUTTON IGNITION SWITCH OPERATION

    Press push-button ignition switch and check if it turns to ON.

    Does ignition switch turn to ON? 

    YES: GO TO 2.

    NO: GO TO  4.

  2. CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)
    1. Disconnect push-button ignition switch connector.
    2. Check voltage between IPDM E/R harness connector and ground.
      TERMINAL VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V) (Approx.)
      IPDM E/R
      Connector Terminal
      E5 28 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO 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 and BCM connector.
    2. Check continuity between IPDM E/R harness connector and push-button ignition switch harness connector.
      TERMINAL CONTINUITY REFERENCE CHART

      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.
      TERMINAL CONTINUITY REFERENCE CHART

      IPDM E/R Ground Continuity
      Connector Terminal
      E5 28 Not existed

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: Repair or replace harness or connector.

  4. CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM)
    1. Disconnect push-button ignition switch connector.
    2. Check voltage between BCM harness connector and ground.

      With steering lock unit

      TERMINAL VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V) (Approx.)
      BCM
      Connector Terminal
      M122 89 Ground Battery voltage

      Without steering lock unit

      TERMINAL VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V) (Approx.)
      BCM
      Connector Terminal
      M121 60 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO 5.

      NO: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

  5. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)
    1. Disconnect BCM connector and IPDM E/R connector.
    2. Check continuity between BCM harness connector and push-button ignition switch harness connector.

      With steering lock unit

      TERMINAL CONTINUITY REFERENCE CHART

      BCM Push-button ignition switch Continuity
      Connector Terminal Connector Terminal
      M122 89 M50 4 Existed

      Without steering lock unit

      TERMINAL CONTINUITY REFERENCE CHART

      BCM Push-button ignition switch Continuity
      Connector Terminal Connector Terminal
      M121 60 M50 4 Existed
    3. Check continuity between BCM harness connector and ground.

      With steering lock unit

      TERMINAL CONTINUITY REFERENCE CHART

      BCM Ground Continuity
      Connector Terminal
      M122 89 Not existed

      Without steering lock unit

      TERMINAL CONTINUITY REFERENCE CHART

      BCM Ground Continuity
      Connector Terminal
      M121 60 Not existed

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair or replace harness or connector.

  6. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END

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