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Home >> Infiniti >> 2012 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 60 (Power Control System (Power Distribution System) (Coupe)) >> DTC/Circuit Diagnosis >> DTC B261A: Push-Button Ignition Switch >> Diagnosis Procedure
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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.
      (+) (-) 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.
      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  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.
      (+) (-) 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.
      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 6.

      NO: Repair or replace harness or connector.

  6. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

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