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Home >> Infiniti >> 2008 >> G35 Base >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Security Control System >> Component Diagnosis >> DTC B2556: Push-Button Ignition Switch >> Diagnosis Procedure
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Diagnosis Procedure

  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 CHART

    (+) (-) Voltage (V) (Approx.)
    Push-button ignition switch
    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 connector M122 and IPDM E/R connector E5.
  2. Check continuity between push-button ignition switch harness connector and ground.
CONTINUITY CHART

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

Is the inspection normal? 

YES: Replace BCM. Refer to REMOVAL AND INSTALLATION .

NO: Repair harness or connector.