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Home >> Infiniti >> 2010 >> G37 Base, 2D Coupe >> Repair and Diagnosis >> External Pages >> Different car >> Section 221 (Security Control System) >> With Intelligent Key System >> DTC/Circuit Diagnosis >> DTC B2556:Push-Button Ignition Switch >> Diagnosis Procedure
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Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Juke. 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.
      CONNECTOR TERMINALS VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V) (Approx.)
      Push-button ignition switch
      Connector Terminal
      M101 8 Ground 12

      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.
      CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

      Push-button ignition switch BCM Continuity
      Connector Terminal Connector Terminal
      M101 8 M70 76 Existed
    3. Check continuity between push-button ignition switch harness connector and ground.
      CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

      Push-button ignition switch Ground Continuity
      Connector Terminal
      M101 8 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-III.

      For initialization and registration procedures, refer to CONSULT-III Operation Manual NATS-IVIS/NVIS.

      INSPECTION END

  4. CHECK PUSH-BUTTON IGNITION SWITCH GROUND CIRCUIT

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

    CONNECTOR TERMINALS CONTINUITY REFERENCE CHART

    Push-button ignition switch Ground Continuity
    Connector Terminal
    M101 4 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

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