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Home >> Infiniti >> 2011 >> FX50 >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Door & Lock - With Automatic Back Door -- FX35/FX50 >> DTC/Circuit Diagnosis >> Key Cylinder Switch >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK DOOR KEY CYLINDER SWITCH INPUT SIGNAL
    1. Turn ignition switch OFF.
    2. Disconnect front door lock assembly (driver side).
    3. Check voltage between front door lock assembly (driver side) harness connector and ground.
      VOLTAGE REFERENCE CHART

      (+) (-) Voltage (V) (Approx.)
      Front door lock assembly (driver side)
      Connector Terminal
      D15 5 Ground 5
      6

      Is the inspection result normal? 

      YES: GO TO  3.

      NO: GO TO 2.

  2. CHECK DOOR KEY CYLINDER SIGNAL CIRCUIT
    1. Disconnect power window main switch connector.
    2. Check continuity between power window main switch harness connector and front door lock assembly (driver side) harness connector.
      CONTINUITY REFERENCE CHART

      Power window main switch Front door lock assembly (driver side) Continuity
      Connector Terminal Connector Terminal
      D8 4 D15 6 Existed
      6 5
    3. Check continuity between power window main switch harness connector and ground.
      CONTINUITY REFERENCE CHART

      Power window main switch Ground Continuity
      Connector Terminal
      D8 4 Not existed
      6

      Is the inspection result normal? 

      YES: Replace power window main switch. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

  3. CHECK DOOR KEY CYLINDER SWITCH GROUND CIRCUIT

    Check continuity between front door lock assembly (driver side) harness connector and ground.

    CONTINUITY REFERENCE CHART

    Front door lock assembly (driver side) Ground Continuity
    Connector Terminal
    D15 4 Existed

    Is the inspection result normal? 

    YES: GO TO 4.

    NO: Repair or replace harness.

  4. CHECK DOOR KEY CYLINDER SWITCH

    Check door key cylinder switch.

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 5.

    NO: Replace front door lock assembly (driver side). Refer to "DOOR ASSEMBLY : REMOVAL AND INSTALLATION ".

  5. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

    INSPECTION END