LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2012 >> G37 IPL, Standard Trans >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window Control System (Coupe) >> DTC/Circuit Diagnosis >> Encoder >> Driver Side >> DRIVER SIDE: Diagnosis Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DRIVER SIDE: Diagnosis Procedure

  1. CHECK ENCODER OPERATION
    1. Turn ignition switch ON.
    2. Check signal between power window main switch harness connector and ground with oscilloscope.
      (+) (-) Signal (Reference value)
      Power window main switch
      Connector Terminal
      D8 9 Ground Refer to the following signal
      13
      Fig 1: Power Window Encoder Signal Waveform (Driver Side)
      G05982168Courtesy of NISSAN NORTH AMERICA, INC.

      Is the inspection result normal? 

      YES: Replace power window main switch. Refer to "REMOVAL AND INSTALLATION ".

      NO: GO TO 2.

  2. CHECK ENCODER SIGNAL CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect power window main switch connector and driver side power window motor connector.
    3. Check continuity between power window main switch harness connector and driver side power window motor harness connector.
      Power window main switch Driver side power window motor Continuity
      Connector Terminal Connector Terminal
      D8 9 D10 5 Existed
      13 2
    4. Check continuity between power window main switch harness connector and ground.
      Power window main switch Ground Continuity
      Connector Terminal
      D8 9 Not existed
      13

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace harness.

  3. CHECK ENCODER POWER SUPPLY CIRCUIT 1
    1. Connect power window main switch connector.
    2. Turn ignition switch ON.
    3. Check voltage between driver side power window motor harness connector and ground.
      (+) (-) Voltage (V) (Approx.)
      Driver side power window motor
      Connector Terminal
      D10 4 Ground Battery voltage

      Is the measurement value within the specification? 

      YES: GO TO  5.

      NO: GO TO 4.

  4. CHECK ENCODER POWER SUPPLY CIRCUIT 2
    1. Turn ignition switch OFF.
    2. Disconnect power window main switch connector.
    3. Check continuity between power window main switch harness connector and driver side power window motor harness connector.
      Power window main switch Driver side power window motor Continuity
      Connector Terminal Connector Terminal
      D8 5 D10 4 Existed
    4. Check continuity between power window main switch harness connector and ground.
      Power window main switch Ground Continuity
      Connector Terminal
      D8 5 Not existed

      Is the inspection result normal? 

      YES: Replace power window main switch. Refer to "REMOVAL AND INSTALLATION ".

      NO: Repair or replace harness.

  5. CHECK GROUND CIRCUIT 1
    1. Turn ignition switch OFF.
    2. Disconnect power window main switch connector.
    3. Check continuity between power window main switch harness connector and driver side power window motor harness connector.
      Power window main switch Driver side power window motor Continuity
      Connector Terminal Connector Terminal
      D8 14 D10 1 Existed

      Is the inspection result normal? 

      YES: GO TO 6.

      NO: Repair or replace harness.

  6. CHECK GROUND CIRCUIT 2
    1. Connect power window main switch connector.
    2. Check continuity between power window main switch harness connector and ground.
      Power window main switch Ground Continuity
      Connector Terminal
      D8 14 Existed

      Is the inspection result normal? 

      YES: Replace driver side power window motor. Refer to "REMOVAL AND INSTALLATION ".

      NO: Replace power window main switch. Refer to "REMOVAL AND INSTALLATION ".