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HOMESERVICE MANUALSINFINITI2013QX56 RWDREPAIR AND DIAGNOSISBODY & FRAMEWINDOWSPOWER WINDOW CONTROL SYSTEMDTC/CIRCUIT DIAGNOSISENCODERDRIVER SIDEDRIVER SIDE: DIAGNOSIS PROCEDURE
2013 Infiniti QX56 RWD

DRIVER SIDE: Diagnosis Procedure

2013 Infiniti QX56 RWDSECTION DRIVER SIDE: Diagnosis Procedure
  1. CHECK ENCODER SIGNAL 
    1. Turn ignition switch ON.
    2. Check signal between power window main switch harness connector and ground with oscilloscope.
      Signal name (+) (-) Signal (Reference value)
      Power window main switch
      Connector Terminal
      Encoder signal 1 D5 11 Ground Refer to following signal
      Encoder signal 2 12
      Fig 1: Power Window Main Switch Encoder Signal Waveform
      G06934392Courtesy 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 front power window motor (driver side) connector.
    3. Check continuity between power window main switch harness connector and front power window motor (driver side) harness connector.
      Power window main switch Front power window motor (driver side) Continuity
      Connector Terminal Connector Terminal
      D5 11 D7 5 Existed
      12 6
    4. Check continuity between power window main switch harness connector and ground.
      Power window main switch Ground Continuity
      Connector Terminal
      D5 11 Not existed
      12

      Is the inspection result normal? 

      YES: GO TO 3.

      NO: Repair or replace harness.

  3. CHECK ENCODER POWER SUPPLY 
    1. Connect power window main switch connector.
    2. Turn ignition switch ON.
    3. Check voltage between front power window motor (driver side) harness connector and ground.
      (+) (-) Voltage (V) (Approx.)
      Front power window motor (driver side)
      Connector Terminal
      D7 2 Ground 12

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: GO TO 4.

  4. CHECK ENCODER POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect power window main switch connector.
    3. Check continuity between power window main switch harness connector and front power window motor (driver side) harness connector.
      Power window main switch Front power window motor (driver side) Continuity
      Connector Terminal Connector Terminal
      D5 3 D7 2 Existed
    4. Check continuity between power window main switch harness connector and ground.
      Power window main switch Ground Continuity
      Connector Terminal
      D5 3 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. Check continuity between front power window motor (driver side) harness connector and ground.
      Front power window motor (driver side) Ground Continuity
      Connector Terminal
      D7 4 Existed

      Is the inspection result normal? 

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

      NO: GO TO 6.

  6. CHECK GROUND CIRCUIT 2 
    1. Disconnect power window main switch connector.
    2. Check continuity between power window main switch harness connector and front power window motor (driver side) harness connector.
      Power window main switch Front power window motor (driver side) Continuity
      Connector Terminal Connector Terminal
      D5 10 D7 4 Existed

      Is the inspection result normal? 

      YES: GO TO 7.

      NO: Repair or replace harness.

  7. CHECK GROUND CIRCUIT 3 

    Check continuity between power window main switch terminals.

    Power window main switch Continuity
    Connector Terminal
    D5 7 10 Existed

    Is the inspection result normal? 

    YES: GO TO 8.

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

  8. CHECK INTERMITTENT INCIDENT 

    Refer to "INTERMITTENT INCIDENT ".

    : INSPECTION END

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.