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Home >> Infiniti >> 2012 >> EX35 Base, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Security Control System >> DTC/Circuit Diagnosis >> DTC B261A: Push-Button Ignition Switch >> Diagnosis Procedure
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Diagnosis Procedure

  1. INSPECTION START

    Perform inspection in accordance with procedure that confirms DTC.

    Which procedure confirms DTC? 

    DTC confirmation procedure 1: GO TO 2.

    DTC confirmation procedure 2: GO TO  4.

  2. CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 1
    1. Turn ignition switch OFF.
    2. Disconnect push-button ignition switch connector and IPDM E/R connector.
    3. Check voltage between push-button ignition switch harness connector and ground.
      (+) (-) Voltage (V) (Approx.)
      Push-button ignition switch
      Connector Terminal
      M50 4 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 3.

  3. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT 1
    1. Disconnect BCM connector.
    2. Check continuity between push-button ignition switch harness connector. and BCM harness connector.
      Push-button ignition switch BCM Continuity
      Connector Terminal Connector Terminal
      M50 4 M122 60 Existed
    3. Check continuity between push-button ignition switch harness connector and ground.
      Push-button ignition switch Ground Continuity
      Connector Terminal
      M50 4 Not existed

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: Repair or replace harness or connector.

  4. CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL 2
    1. Turn ignition switch OFF.
    2. Disconnect push-button ignition switch connector and BCM connector.
    3. Check voltage between push-button ignition switch harness connector and ground.
      (+) (-) Voltage (V) (Approx.)
      Push-button ignition switch
      Connector Terminal
      M50 4 Ground Battery voltage

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 5.

  5. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT 2
    1. Disconnect IPDM E/R connector.
    2. Check continuity between push-button ignition switch harness connector and IPDM E/R harness connector.
      Push-button ignition switch IPDM E/R Continuity
      Connector Terminal Connector Terminal
      M50 4 E5 28 Existed
    3. Check continuity between push-button ignition switch harness connector and ground.
      Push-button ignition switch Ground Continuity
      Connector Terminal
      M50 4 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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