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Home >> Infiniti >> 2018 >> Q70 5.6 Luxe, RWD >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System (Circuit Diagnosis) (Except Hybrid) >> Circuit Diagnosis >> Power Supply And Ground Circuit >> Power Window Main Switch >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK POWER SUPPLY CIRCUIT 1 
    1. Turn ignition switch OFF.
    2. Disconnect power window main switch connectors.
    3. Turn ignition switch ON.
    4. Check voltage between power window main switch harness connector and ground.

      (+)

      (-)

      Voltage (V)

      (Approx.)

      Power window main switch

      Connector

      Terminal

      D22

      4

      Ground

      12

      9

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    GO TO 3.

  2. CHECK GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Check continuity between power window main switch harness connector and ground.

      Power window main switch

      Ground

      Continuity

      Connector

      Terminal

      D22

      7

      Existed

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace harness.

  3. CHECK POWER SUPPLY CIRCUIT 2 
    1. Turn ignition switch OFF.
    2. Disconnect BCM connector.
    3. Check continuity between BCM harness connector and power window main switch harness connector.

      BCM

      Power window main switch

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M122

      68

      D22

      9

      Existed

      69

      4

    4. Check continuity between BCM harness connector and ground.

      BCM

      Ground

      Continuity

      Connector

      Terminal

      M122

      68

      Not existed

      69

    Is the inspection result normal?

    YES

    Replace BCM. Refer to Removal and Installation .

    NO

    Repair or replace harness.

  4. CHECK INTERMITTENT INCIDENT 

    Refer to Intermittent Incident .

    INSPECTION END