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Home >> Infiniti >> 2024 >> Q50 Luxe, AWD >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System >> Component Parts/Circuit Diagnosis >> Encoder (Rear LH) >> Diagnosis Procedure

Diagnosis Procedure

  1. CHECK ENCODER SIGNAL 
    1. Turn ignition switch ON.
    2. Check signal between rear power window switch LH harness connector and ground with oscilloscope.
      (+) (-) Signal
      (Reference value)
      Rear power window switch LH
      Connector Terminal
      D33 12 Ground Refer to following signal
      15
      GNSDB107341Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES>>

    Replace rear power window switch LH. Refer to REAR POWER WINDOW SWITCH : Removal and Installation .

    NO>>

    GO TO 2.

  2. CHECK ENCODER SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect rear power window switch LH connector and rear power window motor LH connector.
    3. Check continuity between rear power window switch LH harness connector and rear power window motor LH harness connector.
      Rear power window switch LH Rear power window motor LH Continuity
      Connector Terminal Connector Terminal
      D33 12 D36 4 Existed
      15 6
    4. Check continuity rear power window switch LH harness connector and ground.
      Rear power window switch LH Ground Continuity
      Connector Terminal
      D33 12 Not existed
      15

    Is the inspection result normal?

    YES>>

    GO TO 3.

    NO>>

    Repair or replace harness.

  3. CHECK ENCODER POWER SUPPLY CIRCUIT 1 
    1. Connect rear power window switch LH connector.
    2. Turn ignition switch ON.
    3. Check voltage between rear power window motor LH harness connector and ground.
      (+) (-) Voltage (V)
      Rear power window motor LH
      Connector Terminal
      D36 5 Ground 9 - 16

    Is the inspection result normal?

    YES>>

    GO TO 5.

    NO>>

    GO TO 4.

  4. CHECK ENCODER POWER SUPPLY CIRCUIT2 
    1. Turn ignition switch OFF.
    2. Disconnect rear power window switch LH connector.
    3. Check continuity between rear power window switch LH harness connector and rear power window motor LH harness connector.
      Rear power window switch LH Rear power window motor LH Continuity
      Connector Terminal Connector Terminal
      D33 4 D36 5 Existed
    4. Check continuity between rear power window switch LH harness connector and ground.
      Rear power window switch LH Ground Continuity
      Connector Terminal
      D33 4 Not existed

    Is the inspection result normal?

    YES>>

    Replace rear power window switch LH. Refer to REAR POWER WINDOW SWITCH : Removal and Installation .

    NO>>

    Repair or replace harness.

  5. CHECK GROUND CIRCUIT 1 
    1. Turn ignition switch OFF.
    2. Disconnect rear power window switch LH harness connector.
    3. Check continuity between rear power window switch LH harness connector and rear power window motor LH harness connector.
      Rear power window switch LH Rear power window motor LH Continuity
      Connector Terminal Connector Terminal
      D33 3 D36 3 Existed

    Is the inspection result normal?

    YES>>

    GO TO 6.

    NO>>

    Repair or replace harness.

  6. CHECK GROUND CIRCUIT 2 
    1. Connect rear power window switch LH connector.
    2. Check continuity between rear power window switch LH connector and ground.
      Rear power window switch LH Ground Continuity
      Connector Terminal
      D33 3 Existed

    Is the inspection result normal?

    YES>>

    Replace rear power window motor LH. Refer to REAR REGULATOR : Removal and Installation .

    NO>>

    Replace rear power window switch LH. Refer to REAR POWER WINDOW SWITCH : Removal and Installation .

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