LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Nissan-Datsun >> 2012 >> Altima SL >> Repair and Diagnosis (Single Page) >> Body & Frame >> Windows >> Power Window Control System (LH Only Anti-Pinch) (Sedan) >> DTC/Circuit Diagnosis >> Encoder >> Driver Side >> DRIVER SIDE: Diagnosis Procedure >> Encoder Circuit Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Encoder Circuit Check

  1. CHECK ENCODER OPERATION
    1. Connect 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.
    Fig 1: Checking Encoder Operation
    G05046757Courtesy of NISSAN NORTH AMERICA, INC.
    Terminals Signal (Reference value)
    (+) (-)
    Main power window and door lock/unlock switch connector Terminal
    D12 9 Ground Refer to following signal
    13
    Fig 2: Encoder Signal Waveform Graph
    G04888492Courtesy of NISSAN NORTH AMERICA, INC.

    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. Turn ignition switch ON.
    2. Check voltage between front power window motor LH connector and ground.
    Terminal Voltage (V) (Approx.)
    (+) (-)
    Front power window motor LH connector Terminal
    D9 4 Ground 10
    Fig 3: Checking Front Power Window Motor LH Power Supply
    G05046759Courtesy of NISSAN NORTH AMERICA, INC.

    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 and front power window motor LH.
    3. Check continuity between main power window and door lock/unlock switch connector (A) and front power window motor connector (B).
      Main power window and door lock/unlock switch connector Terminal Front power window motor LH connector Terminal Continuity
      D12 (A) 15 D9 (B) 4 Yes
      Fig 4: Checking Harness Continuity 1
      G05046760Courtesy of NISSAN NORTH AMERICA, INC.
    4. Check continuity between main power window and door lock/unlock switch connector (A) and ground.
    Main power window and door lock/unlock switch connector Terminal Ground Continuity
    D12 (A) 15 No

    Is the inspection result normal? 

    YES: Replace main power window and door lock/unlock switch. Refer to "REMOVAL AND INSTALLATION ". After that, refer to "DRIVER SIDE: SPECIAL REPAIR REQUIREMENT ".

    NO: Repair or replace harness.

  4. CHECK GROUND CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect front power window motor LH.
    3. Check continuity between front power window motor LH connector and ground.
    Front power window motor LH connector Terminal Ground Continuity
    D9 6 Yes
    Fig 5: Checking Ground Circuit
    G05046761Courtesy of NISSAN NORTH AMERICA, INC.

    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 (A) and front power window motor LH connector (B).
    Main power window and door lock/unlock switch connector Terminal Front power window motor LH connector Terminal Continuity
    D12 (A) 2 D9 (B) 6 Yes
    Fig 6: Checking Harness Continuity 2
    G05046762Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal? 

    YES: Check main power window and door lock/unlock switch. Refer to "POWER WINDOW MAIN SWITCH: COMPONENT INSPECTION ".

    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).
      Main power window and door lock/unlock switch connector Terminal Front power window motor LH connector Terminal Continuity
      D12 (A) 9 D9 (B) 3 Yes
      13 5
      Fig 7: Checking Harness Continuity 3
      G05046763Courtesy of NISSAN NORTH AMERICA, INC.
    3. Check continuity between main power window and door lock/unlock switch connector (A) and ground.
    Main power window and door lock/unlock switch connector Terminal Ground Continuity
    D12 (A) 9 No
    13

    Is the inspection result normal? 

    YES: Replace front power window motor LH. Refer to "REMOVAL AND INSTALLATION ". After that, refer to "DRIVER SIDE: SPECIAL REPAIR REQUIREMENT ".

    NO: Repair or replace harness.

scientia non olet · About LEMON Manuals