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Home >> Infiniti >> 2016 >> Q50 Base, RWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Door & Lock (DTC/Circuit Diagnosis) (Except Hybrid) >> DTC/Circuit Diagnosis >> Door 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) connector.
    3. Check voltage between front door lock assembly (driver side) harness connector and ground.
      (+) (-) Voltage
      Front door lock assembly (driver side)
      Connector Terminal
      D1 5 Ground 4 - 6 V
      6

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 2  .

  2. CHECK DOOR KEY CYLINDER SWITCH 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.
      Power window main switch Front door lock assembly (driver side) Continuity
      Connector Terminal Connector Terminal
      D8 15 D1 6 Existed
      16 5
    3. Check continuity between power window main switch harness connector and ground.
      Power window main switch Ground Continuity
      Connector Terminal
      D8 15 Not existed
      16

    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.

    Front door lock assembly (driver side) Ground Continuity
    Connector Terminal
    D1 4 Existed

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace harness.

  4. CHECK DOOR KEY CYLINDER SWITCH

    Refer to COMPONENT INSPECTION .

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Replace front door lock assembly (driver side).

  5. CHECK INTERMITTENT INCIDENT

    Refer to INTERMITTENT INCIDENT .

    INSPECTION END