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Home >> Infiniti >> 2011 >> G37 Base, 2D Convertible >> Repair and Diagnosis >> Electrical >> Body Electrical >> Power Control System -- G37 Convertible >> Power Distribution System >> DTC/Circuit Diagnosis >> DTC B261A: Push-Button Ignition Switch >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK BCM OUTPUT
    1. Turn ignition switch OFF.
    2. Disconnect push-button ignition switch connector and IPDM E/R connector.
    3. 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: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

      NO: GO TO 2.

  2. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT
    1. Disconnect BCM connector.
    2. Check continuity between IPDM E/R harness connector and BCM harness connector.

      With steering lock unit

      TERMINAL CONTINUITY REFERENCE CHART

      IPDM E/R BCM Continuity
      Connector Terminal Connector Terminal
      E5 28 M122 89 Existed

      Without steering lock unit

      TERMINAL CONTINUITY REFERENCE CHART

      IPDM E/R BCM Continuity
      Connector Terminal Connector Terminal
      E5 28 M121 60 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: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

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