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Home >> Nissan-Datsun >> 2013 >> Sentra S, Standard Trans >> Repair and Diagnosis >> Electrical >> Body Electrical >> Power Control System (Power Distribution System) >> DTC/Circuit Diagnosis >> DTC B261A: Push-Button Ignition Switch >> Diagnosis Procedure
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Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

  1. CHECK PUSH-BUTTON IGNITION SWITCH OUTPUT SIGNAL (PUSH-BUTTON IGNITION SWITCH) 
    1. Disconnect push-button ignition switch connector.
    2. Check voltage between push-button ignition switch connector M25 and ground.
      Push-button ignition switch Ground Voltage (Approx.)
      Connector Terminal
      M25 8 - Battery voltage

      Is the inspection result normal? 

      YES: GO TO 2.

      NO: GO TO  4.

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

    Check voltage between IPDM E/R connector E39 and ground.

    IPDM E/R Ground Voltage (Approx.)
    Connector Terminal
    E39 66 - 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. Turn ignition switch OFF.
    2. Disconnect IPDM E/R connector E39 and BCM connector M83.
    3. Check continuity between IPDM E/R connector E39 and push-button ignition switch connector M25.
      IPDM E/R Push-button ignition switch Continuity
      Connector Terminal Connector Terminal
      E39 66 M25 8 Yes
    4. Check continuity between IPDM E/R connector E39 and ground.
      IPDM E/R Ground Continuity
      Connector Terminal
      E39 66 - No

      Is the inspection result normal? 

      YES: Refer to "INTERMITTENT INCIDENT ".

      NO: Repair or replace harness or connectors.

  4. CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM) 

    Check voltage between BCM connector M83 and ground.

    BCM Ground Voltage (Approx.)
    Connector Terminal
    M83 55 - 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. Turn ignition switch OFF.
    2. Disconnect BCM connector M83 and IPDM E/R connector E39.
    3. Check continuity between BCM connector M83 and push-button ignition switch connector M25.
      BCM Push-button ignition switch Continuity
      Connector Terminal Connector Terminal
      M83 55 M25 8 Yes
    4. Check continuity between BCM connector M83 and ground.
      BCM Ground Continuity
      Connector Terminal
      M83 55 - No

      Is the inspection result normal? 

      YES: Refer to "INTERMITTENT INCIDENT ".

      NO: Repair or replace harness or connectors.