LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2008 >> G37 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 60 (Power Window Control System) >> Component Diagnosis >> Encoder Circuit Check Front LH (Crew Cab) >> Driver Side >> DRIVER SIDE : Diagnosis Procedure >> Encoder Circuit Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Encoder Circuit Check

WARNING: This page is about a different car, the 2008 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK ENCODER OPERATION
    1. Disconnect front power window motor LH.
    2. Turn ignition switch ON.
    3. Check signal between main power window and door lock/unlock switch connector and ground with oscilloscope.
    SIGNAL REFERENCE CHART

    Terminals Signal (Reference value)
    (+) (-)
    Main power window and door lock/unlock switch connector Terminal
    D7 9 Ground Refer to following signal
    13
    Fig 1: Identifying Signal Between Main Power Window And Door Lock/Unlock Switch Connector And Ground
    G05046757Courtesy of NISSAN MOTOR CO., U.S.A.
    Fig 2: Signal Pulse Of Terminal 9 And 13
    G04888492Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    Yes: Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    No: GO TO  2

  2. CHECK FRONT POWER WINDOW MOTOR LH POWER SUPPLY
    1. Disconnect front power window motor LH.
    2. Turn ignition switch ON.
    3. Check voltage between front power window motor LH connector and ground.
    VOLTAGE REFERENCE CHART

    Terminal Voltage (V) (Approx.)
    (+) (-)
    Front power window motor LH connector Terminal
    D9 4 Ground 10
    Fig 3: Identifying Voltage Between Front Power Window Motor LH Connector Terminal 4 And Ground
    G04902759Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the measurement value within the specification? 

    Yes: GO TO  4

    No: GO TO  3

  3. CHECK HARNESS CONTINUITY 1
    1. Turn ignition switch OFF.
    2. Disconnect main power window and door lock/unlock switch.
    3. Check continuity between main power window and door lock/unlock switch connector (A) and front power window motor LH connector (B).
      CONTINUITY SPECIFIED CONDITIONS

      Main power window and door lock/unlock switch connector Terminal Front power window motor LH connector Terminal Continuity
      D7 (A) 15 D9 (B) 4 Yes
    4. Check continuity between main power window and door lock/unlock switch connector (A) and ground.
    CONTINUITY SPECIFIED CONDITIONS

    Main power window and door lock/unlock switch connector Terminal Ground Continuity
    D7 (A) 15 No
    Fig 4: Identifying Continuity Between Main Power Window And Door Lock/Unlock Switch Connector (A) And Front Power Window Motor LH Connector (B)
    G05382342Courtesy of NISSAN MOTOR CO., U.S.A.

    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.

  4. CHECK GROUND CIRCUIT
    1. Turn ignition switch OFF.
    2. Check continuity between front power window motor LH connector and ground.
    CONTINUITY SPECIFIED CONDITIONS

    Front power window motor LH connector Terminal Ground Continuity
    D9 6 Yes
    Fig 5: Identifying Continuity Between Front Power Window Motor LH Connector D9 Terminal 6 And Ground
    G04902751Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

    Yes: GO TO  6

    No: GO TO  5

  5. CHECK HARNESS CONTINUITY 2
    1. Disconnect main power window and door lock/unlock switch.
    2. Check continuity between main power window and door lock/unlock switch connector and front power window motor LH connector.
    CONTINUITY SPECIFIED CONDITIONS

    Main power window and door lock/unlock switch connector Terminal Front power window motor LH connector Terminal Continuity
    D7 2 D9 6 Yes
    Fig 6: Identifying Continuity Between Main Power Window And Door Lock/Unlock Switch Connector And Front Power Window Motor LH Connector
    G04902752Courtesy of NISSAN MOTOR CO., U.S.A.

    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.

  6. CHECK HARNESS CONTINUITY 3
    1. Disconnect main power window and door lock/unlock switch.
    2. Check continuity between main power window and door lock/unlock switch connector (A) and front power window motor LH connector (B).
      CONTINUITY SPECIFIED CONDITIONS

      Main power window and door lock/unlock switch connector Terminal Front power window motor LH connector Terminal Continuity
      D7 (A) 9 D9 (B) 5 Yes
      13 3
    3. Check continuity between main power window and door lock/unlock switch connector (A) and ground.
    CONTINUITY SPECIFIED CONDITIONS

    Main power window and door lock/unlock switch connector Terminal Ground Continuity
    D7 (A) 9 No
    13
    Fig 7: Identifying Continuity Between Main Power Window And Door Lock/Unlock Switch Connector (A) And Front Power Window Motor LH Connector (B)
    G05382345Courtesy of NISSAN MOTOR CO., U.S.A.

    Is the inspection result normal? 

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

    No: Repair or replace harness.

scientia non olet · About LEMON Manuals