2002 Nissan-Datsun Sentra SE-R, AutomaticFACTORY OEM SERVICE PROCEDURE

Encoder Circuit Check (Driver Side)

WARNING: This page is about a different car, the 2004 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FRONT POWER WINDOW MOTOR (DRIVER SIDE) POWER SUPPLY 
    1. Turn ignition switch ON.
    2. Check voltage between front power window motor (driver side) connector D8 terminal 4 and ground.

      4 (G/R) - Ground Approx. 10 V 

      Fig 1: Checking Voltage Between Front Power Window Motor (Driver Side) Connector D8 Terminal 4 And Ground
      G03491666Courtesy of NISSAN MOTOR CO., U.S.A.

    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 motor (driver side) and power window main switch.
    3. Check continuity between power window main switch connector D6 terminal 15 and front power window motor (driver side) connector D8 terminal 4.

      15 (G/R) - 4 (G/R) Continuity should exist. 

      Fig 2: Checking Continuity Between Power Window Main Switch Connector D6 Terminal 15 And Front Power Window Motor (Driver Side) Connector D8 Terminal 4
      G03491667Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: Replace power window main switch.
    2. NG: Repair or replace harness between power window main switch connector and front power window motor (driver side) connector.
  3. CHECK GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect front power window motor (driver side) connector.
    3. Check continuity between front power window motor (driver side) connector D8 terminal 6 and round.

      6 (W/B) - Ground Continuity should exist. 

      Fig 3: Checking Continuity Between Front Power Window Motor Connector D8 Terminal 6 And Ground
      G03491668Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: GO TO  5 .
    2. NG: GO TO 4.
  4. CHECK HARNESS CONTINUITY 2 
    1. Disconnect power window main switch connector.
    2. Check continuity between power window main switch connector D6 terminal 2 and front power window motor (driver side) connector D8 terminal 6.

      2 (W/B) - 6 (W/B) Continuity should exist. 

      Fig 4: Checking Continuity Between Power Window Main Switch Connector D6 Terminal 2 And Front Power Window Motor (Driver Side) Connector D8 Terminal 6
      G03491669Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG

    1. OK: Replace power window main switch.
    2. NG: Repair or replace harness between power window main switch and front power window motor (driver side).
  5. CHECK ENCODER SIGNAL 
    1. Connect front power window motor (driver side) connector.
    2. Turn ignition switch ON.
    3. Check the signal between power window main switch connector and ground with oscilloscope.
      Fig 5: Reference Value Chart
      G03491670Courtesy of NISSAN MOTOR CO., U.S.A.
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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.