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Home >> Infiniti >> 2007 >> G35 x >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Security Control System (Sedan) >> Intelligent Key System >> Component Diagnosis >> DTC B2556: Push-Button Ignition Switch >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK PUSH-BUTTON IGNITION SWITCH INPUT SIGNAL
    1. Turn ignition switch OFF.
    2. Disconnect push-button ignition switch harness connector.
    3. Check voltage between push-button ignition switch harness connector and ground.
      TERMINALS VOLTAGE REFERENCE

      Push-button ignition switch Ground Voltage [V]
      Connector Terminal
      M50 4 Ground Battery voltage

    Is the inspection normal? 

    YES: GO TO 2.

    NO: GO TO  4.

  2. CHECK PUSH-BUTTON IGNITION SWITCH

    Refer to , "COMPONENT INSPECTION ".

    Is the inspection normal? 

    YES: GO TO 3.

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

  3. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END.

  4. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT FOR SHORT
    1. Disconnect BCM harness connector M122 and IPDM E/R harness connector E5.
    2. Check continuity between push-button ignition switch harness connector and ground.
      TERMINALS CONTINUITY REFERENCE

      Push-button ignition switch Ground Continuity
      Connector Terminal
      M50 4 Ground Not existed

    Is the inspection normal? 

    YES: Replace BCM. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair harness or connector.