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Home >> Nissan-Datsun >> 2012 >> Quest SL >> Repair and Diagnosis >> External Pages >> Different car >> Section 29 (Security Control System) >> DTC/Circuit Diagnosis >> DTC B2556: Push-Button Ignition Switch >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL
    1. Turn ignition switch OFF.
    2. Disconnect push-button ignition switch connector.
    3. Check voltage between push-button ignition switch harness connector and ground.
      VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V) (Approx.)
      Push-button ignition switch
      Connector Terminal
      M101 4 Ground 9 - 16

      Is the inspection result normal? 

      YES: Go to  4.

      NO: Go to 2.

  2. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT
    1. Disconnect BCM connector and IPDM E/R connector.
    2. Check continuity between push-button ignition switch harness connector and BCM harness connector.
      CONTINUITY REFERENCE CHART

      Push-button ignition switch BCM Continuity
      Connector Terminal Connector Terminal
      M101 4 M124 76 Existed
    3. Check continuity between push-button ignition switch harness connector and ground.
      CONTINUITY REFERENCE CHART

      Push-button ignition switch Ground Continuity
      Connector Terminal
      M101 4 Not existed

      Is the inspection result normal? 

      YES: Go to 3.

      NO: Repair or replace harness.

  3. REPLACE BCM
    1. Replace BCM. Refer to "REMOVAL AND INSTALLATION ".
    2. Perform initialization of BCM and registration of all Intelligent Keys using CONSULT.

      INSPECTION END

  4. CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT

    Check continuity between push-button ignition switch harness connector and ground.

    CONTINUITY REFERENCE CHART

    Push-button ignition switch Ground Continuity
    Connector Terminal
    M101 1 Existed

    Is the inspection result normal? 

    YES: Go to 5.

    NO: Repair or replace harness.

  5. CHECK PUSH-BUTTON IGNITION SWITCH

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: Go to 6.

    NO: Replace push-button ignition switch. Refer to "REMOVAL AND INSTALLATION ".

  6. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END