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Encoder Circuit Inspection

  1. CHECK FRONT POWER WINDOW MOTOR LH POWER SUPPLY 
    1. Turn ignition switch OFF.
    2. Disconnect front power window motor LH.
    3. Turn ignition switch ON.
    4. Check voltage between front power window motor LH connector D9 terminal 1 and ground.

      1 - Ground: Approx. 10V 

    OK or NG 

    OK >> GO TO  3.

    NG >> GO TO 2.

    Fig 1: Checking Voltage Between Front Power Window Motor LH Connector Terminal 1 And Ground
    G04814844Courtesy of NISSAN MOTOR CO., U.S.A.
  2. CHECK HARNESS CONTINUITY 
    1. Turn ignition switch OFF.
    2. Disconnect main power window and door lock/unlock switch.
    3. Check continuity between front power window motor LH connector and main power window and door lock/unlock switch connector.
      TERMINALS CONTINUITY CHART

      Connector Terminal Connector Terminal Continuity
      A B
      Main power window and door lock/unlock switch: D7 15 Front power window motor LH: D9 1 Yes
      Fig 2: Checking Continuity Between Front Power Window Motor LH Connector And Main Power Window And Door Lock/Unlock Switch Connector
      G04814845Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check continuity between front power window motor LH connector and ground.
      TERMINALS CONTINUITY CHART

      Connector Terminal Ground Continuity
      B
      Front power window motor LH: D9 15 No

    OK or NG 

    OK >> Replace main power window and door lock/unlock switch. Refer to "FRONT DOOR ".

    NG >> Repair or replace harness.

  3. CHECK ENCODER GROUND 
    1. Turn ignition switch OFF.
    2. Check continuity between front power window motor LH connector D9 terminal 6 and ground.

      6 - Ground: Continuity should exist. 

    OK or NG 

    OK >> GO TO  5.

    NG >> GO TO 4.

    Fig 3: Checking Continuity Between Front Power Window Motor LH Connector Terminal 6 And Ground
    G04814846Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK ENCODER GROUND CIRCUIT 
    1. Disconnect main power window and door lock/unlock switch.
    2. Check continuity between front power window motor LH connector D9 terminal 6 and main power window and door lock/unlock switch connector D7 terminal 2.

      6 - 2: Continuity should exist. 

    OK or NG 

    OK >> Replace main power window and door lock/unlock switch. Refer to "FRONT DOOR ".

    NG >> Repair or replace harness.

    Fig 4: Checking Continuity Between Front Power Window Motor LH Connector
    G04814847Courtesy of NISSAN MOTOR CO., U.S.A.
  5. CHECK ENCODER PULSE A SIGNAL 
    1. Connect front power window motor LH.
    2. Turn ignition switch ON.
    3. Check the signal between main power window and door lock/unlock switch connector and ground with oscilloscope.
      TERMINALS SIGNAL REFERENCE CHART

      Connector Terminals Condition Signal
      (+) (-)
      D7 13 Ground Opening
      G04814831Courtesy of NISSAN MOTOR CO., U.S.A.
      Fig 5: Checking Signal Between Main Power Window And Door Lock / Unlock Switch Connector And Ground
      G04814849Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK >> Replace main power window and door lock/unlock switch. Refer to "FRONT DOOR ".

    NG >> GO TO 6.

  6. CHECK ENCODER PULSE B SIGNAL 

    Check the signal between main power window and door lock/unlock switch connector and ground with oscilloscope.

    TERMINALS SIGNAL REFERENCE CHART

    Connector Terminals Condition Signal
    (+) (-)
    D7 9 Ground Opening
    G04814831Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 6: Checking Signal Between Main Power Window And Door Lock/Unlock Switch Connector And Ground
    G04814851Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    OK >> Replace main power window and door lock/unlock switch. Refer to "FRONT DOOR ".

    NG >> GO TO 7.

  7. CHECK ENCODER CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect front power window motor LH and main power window and door lock/unlock switch.
    3. Check continuity between front power window motor LH connector and main power window and door lock/unlock switch connector.
      TERMINALS CONTINUITY CHART

      Connector Terminal Connector Terminal Continuity
      A B
      Main power window and door lock/unlock switch: D7 9 Front power window motor LH: D9 5 Yes
      13 4
      Fig 7: Checking Continuity Between Front Power Window Motor LH Connector
      G04814852Courtesy of NISSAN MOTOR CO., U.S.A.
    4. Check continuity between front power window motor LH connector and ground.
      TERMINALS CONTINUITY CHART

      Connector Terminal Ground Continuity
      A
      Main power window and door lock/unlock switch: D7 9 No
      13

    OK or NG 

    OK >> Replace front power window motor LH. Refer to "FRONT DOOR GLASS AND REGULATOR ".

    NG >> Repair or replace harness.

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