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Home >> Nissan-Datsun >> 2017 >> Altima Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 133 (Power Control System (Power Distribution System)) >> DTC/Circuit Diagnosis >> DTC B261A: Push-Button Ignition Switch >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

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 M208 terminal 8 and ground.
      Push-Button Ignition Switch Ground Voltage
      (Approx.)
      Connector Terminal
      M208 8 - Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 2  .

    NO 

    GO TO STEP 4  .

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

    Check voltage between IPDM E/R connector E119 terminal 38 and ground.

    IPDM E/R Ground Voltage
    (Approx.)
    Connector Terminal
    E119 38 - Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 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 E119 and BCM connector M18.
    3. Check continuity between IPDM E/R connector E119 terminal 38 and push-button ignition switch connector M208 terminal 8.
      IPDM E/R Push-Button Ignition Switch Continuity
      Connector Terminal Connector Terminal
      E119 38 M208 8 Yes
    4. Check continuity between IPDM E/R connector E119 terminal 38 and ground.
      IPDM E/R Ground Continuity
      Connector Terminal
      E119 38 - 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 M18 terminal 1 and ground.

    BCM Ground Voltage
    (Approx.)
    Connector Terminal
    M18 1 - Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 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 M18 and IPDM E/R connector E119.
    3. Check continuity between BCM connector M18 terminal 1 and push-button ignition switch connector M208 terminal 8.
      BCM Push-Button Ignition Switch Continuity
      Connector Terminal Connector Terminal
      M18 1 M208 8 Yes
    4. Check continuity between BCM connector M18 terminal 1 and ground.
      BCM Ground Continuity
      Connector Terminal
      M18 1 - No

    Is the inspection result normal?

    YES 

    Refer to INTERMITTENT INCIDENT .

    NO 

    Repair or replace harness or connectors.