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Diagnosis Procedure

Regarding Wiring Diagram information, refer to WIRING DIAGRAM .

  1. CHECK ENCODER SIGNAL

    1. Turn ignition switch ON.
    2. Check signal between main power window and door lock/unlock switch harness connector D7 and ground with oscilloscope.
      Fig 1: Encoder Signal 1 And 2 Voltage Waveform (Window Up And Down)
      G06934392Courtesy of NISSAN NORTH AMERICA, INC.
      Signal Name (+) (-) Signal
      (Reference Value)
      Main Power Window And Door Lock/Unlock Switch
      Connector Terminal
      Encoder signal 1 D7 5 Ground Refer to following signal
      Encoder signal 2 4

    Is the inspection result normal?

    YES 

    Replace main power window and door lock/unlock switch. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 2  .

  2. CHECK ENCODER SIGNAL CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect main power window and door lock/unlock switch connector D7 and front power window motor LH connector D9.
    3. Check continuity between main power window and door lock/unlock switch harness connector D7 and front power window motor LH harness connector D9.
      Main Power Window And Door Lock/Unlock Switch Front Power Window Motor LH Continuity
      Connector Terminal Connector Terminal
      D7 4 D9 6 Yes
      5 5
    4. Check continuity between main power window and door lock/unlock switch harness connector D7 and ground.
      Main Power Window And Door Lock/Unlock Switch Ground Continuity
      Connector Terminal
      D7 4 No
      5

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace harness.

  3. CHECK ENCODER POWER SUPPLY

    1. Connect main power window and door lock/unlock switch connector D7.
    2. Turn ignition switch ON.
    3. Check voltage between front power window motor LH harness connector D9 and ground.
      (+) (-) Voltage
      (Approx.)
      Front Power Window Motor LH
      Connector Terminal
      D9 2 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 4  .

  4. CHECK ENCODER POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect main power window and door lock/unlock switch connector D7.
    3. Check continuity between main power window and door lock/unlock switch harness connector D7 and front power window motor LH harness connector D9.
      Main Power Window And Door Lock/Unlock Switch Front Power Window Motor LH Continuity
      Connector Terminal Connector Terminal
      D7 14 D9 2 Yes
    4. Check continuity between main power window and door lock/unlock switch harness connector D7 and ground.
      Main Power Window And Door Lock/Unlock Switch Ground Continuity
      Connector Terminal
      D7 14 No

    Is the inspection result normal?

    YES 

    Replace main power window and door lock/unlock switch. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.

  5. CHECK GROUND CIRCUIT 1

    1. Turn ignition switch OFF.
    2. Check continuity between front power window motor LH harness connector D9 and ground.
      Front Power Window Motor LH Ground Continuity
      Connector Terminal
      D9 4 Yes

    Is the inspection result normal?

    YES 

    Replace front power window motor LH. Refer to REMOVAL AND INSTALLATION .

    NO 

    GO TO STEP 6  .

  6. CHECK GROUND CIRCUIT 2

    1. Disconnect main power window and door lock/unlock switch connector D7.
    2. Check continuity between main power window and door lock/unlock switch harness connector D7 and front power window motor LH harness connector D9.
      Main Power Window And Door Lock/Unlock Switch Front Power Window Motor LH Continuity
      Connector Terminal Connector Terminal
      D7 12 D9 4 Yes
    3. Check continuity between main power window and door lock/unlock switch harness connector D7 and ground.
      Main Power Window And Door Lock/Unlock Switch Ground Continuity
      Connector Terminal
      D7 12 No

    Is the inspection result normal?

    YES 

    Replace main power window and door lock/unlock switch. Refer to REMOVAL AND INSTALLATION .

    NO 

    Repair or replace harness.

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