2004 Infiniti FX45FACTORY OEM SERVICE PROCEDURE

Encoder Circuit Check (Passenger Side)

  1. Check Front Power Window Motor (Passenger Side) Power Supply 
    1. Turn ignition switch ON.
    2. Check voltage between front power window motor (passenger side) connector D38 terminal 4 and ground.
      Fig 1: Checking Voltage At Passenger Side Front Power Window Motor Connector Terminal 4
      G02494101Courtesy of NISSAN MOTOR CO., U.S.A.

      4 (R) - Ground: Approx. 10 V 

    OK or NG

    1. OK: Go to  3 .
    2. NG: Go to 2.

  2. Check Harness Continuity 1 
    1. Turn ignition switch OFF.
    2. Disconnect front power window switch (passenger side) and front power window motor (passenger side) connector.
    3. Check continuity between front power window switch (passenger side) connector D36 terminal 4 and front power window motor (passenger side) connector D38 terminal 4.
      Fig 2: Checking Continuity Passenger Side Front Power Window Switch Connector D36 Terminal 4 To Passenger Side Front Power Window Motor Connector D38 Terminal 4
      G02494102Courtesy of NISSAN MOTOR CO., U.S.A.

      4 (R) - 4 (R): Continuity should exist  .

    OK or NG

    1. OK: Replace front power window switch (passenger side).
    2. NG: Repair or replace harness between front power window switch (passenger side) and front power window motor (passenger side).

  3. Check Ground Circuit 
    1. Turn ignition switch OFF.
    2. Disconnect front power window motor (passenger side) connector
    3. Check continuity between front power window motor (passenger side) connector D38 terminal 6 and ground.
      Fig 3: Checking Continuity Passenger Side Front Power Window Motor Connector D38 Terminal 6 To Body Ground
      G02494103Courtesy of NISSAN MOTOR CO., U.S.A.

      6 (SB) - Ground: Continuity should exist  .

    OK or NG

    1. OK: Go to  5 .
    2. NG: Go to 4.

  4. Check Harness Continuity 2 
    1. Disconnect front power window switch (passenger side) connector.
    2. Check continuity between front power window switch (passenger side) connector D36 terminal 3 and front power window motor (passenger side) connector D38 terminal 6.
      Fig 4: Checking Continuity Front Power Window Switch Connector D36 Terminal 3 To Motor Connector D38 Terminal 6
      G02494104Courtesy of NISSAN MOTOR CO., U.S.A.

      3 (SB) - 6 (SB): Continuity should exist  .

    OK or NG

    1. OK: Replace front power window switch (passenger side).
    2. NG: Repair or replace harness between front power window switch (passenger side) and front power window motor (passenger side).

  5. Check Encoder Signal 
    1. Connect front power window motor (passenger side) connector.
    2. Turn ignition switch ON.
    3. Check signal between front power window switch (passenger side) connector and ground with oscilloscope.
      Fig 5: Identifying Passenger's Side Front Power Window Switch Signal
      G02494105Courtesy of NISSAN MOTOR CO., U.S.A.
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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.

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