Encoder Circuit Check Front LH (With Front Left and Right Only Power Window Anti-pinch System)

WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FRONT POWER WINDOW MOTOR LH POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between front power window motor LH connector D9 terminal 5 and ground.
  5 (G/R) - Ground: Approx. 10V
OK or NG
- OK: GO TO 3.
- NG: GO TO 2.
  
  Fig 1: Checking Voltage Between Front Power Window Motor LH Connector D9 Terminal 5 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect front power window motor LH and main power window and door lock/unlock switch.
3. Check continuity between front power window motor LH connector D9 terminal 5 and main power window and door lock/unlock switch connector D7 terminal 15.
  5 (G/R) - 15 (G/R): Continuity should exist.
OK or NG
- OK: Replace main power window and door lock/unlock switch.
- NG: Repair or replace harness.
  
  Fig 2: Checking Harness Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK ENCODER GROUND
1. Turn ignition switch OFF.
2. Disconnect front power window motor LH.
3. Check continuity between front power window motor LH connector D9 terminal 3 and ground.
  3 (W/B) - Ground: Continuity should exist.
OK or NG
- OK: GO TO 5.
- NG: GO TO 4.
  
  Fig 3: Checking Continuity Between Front Power Window Motor LH Connector D9 Terminal 3 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK ENCODER GROUND CIRCUIT
1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between front power window motor LH connector D9 terminal 3 and main power window and door lock/unlock switch connector D7 terminal 2.
  3 (W/B) - 2 (W/B): Continuity should exist.
OK or NG
- OK: Replace main power window and door lock/unlock switch.
- NG: Repair or replace harness.
  
  Fig 4: Checking Encoder Ground Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK ENCODER SIGNAL
1. Connect front power window motor LH.
2. Turn ignition switch ON.
3. Check the signal between main power window and door lock/unlock switch connector and ground with oscilloscope.
  
  Fig 5: Signal Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 6: Checking Signal Between Main Power Window And Door Lock/Unlock Switch Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Replace main power window and door lock/unlock switch.
- NG: GO TO 6.
CHECK ENCODER CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect front power window motor LH and main power window and door lock/unlock switch.
3. Check continuity between front power window motor LH connector D9 terminal 6 and main power window and door lock/unlock switch connector D7 terminal 13.
  6 (G/Y) - 13 (G/Y): Continuity should exist.
OK or NG
- OK: Replace front power window motor LH. Refer to "FRONT DOOR GLASS AND REGULATOR ".
- NG: Repair or replace harness.
  
  Fig 7: Checking Encoder Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.