Encoder Circuit Check Front LH / Without Rear Power Vent Windows

WARNING: This page is about a different car, the 2004 Nissan Quest. 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 6 and ground.
1. 6 (G/R) - Ground: Approx. 10V
OK or NG
1. OK: GO TO 3 .
2. NG: GO TO 2.
Fig 1: Checking Voltage Between Front Power Window Motor LH Connector D9 Terminal 6 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 6 and main power window and door lock/unlock switch connector D7 terminal 5.
1. 6 (G/R) - 5 (G/R): Continuity should exist.
OK or NG
1. OK: Replace main power window and door lock/unlock switch.
2. NG: Repair or replace harness.
  
  Fig 2: Checking Continuity Between Front Power Window Motor LH Connector Terminal And Main Power Window And Door Lock/Unlock Switch Connector Terminal
  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 4 and ground.
1. 4 (W/B) - Ground: Continuity should exist.
OK or NG
1. OK: GO TO 5 .
2. NG: GO TO 4.
Fig 3: Checking Continuity Between Front Power Window Motor LH Connector D9 Terminal 4 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 4 and main power window and door lock/unlock switch connector D7 terminal 14.
1. 4 (W/B) - 14 (W/B): Continuity should exist.
OK or NG
1. OK: Replace main power window and door lock/unlock switch.
2. NG: Repair or replace harness.
Fig 4: Checking Continuity Between Front Power Window Motor LH Connector Terminal And Main Power Window And Door Lock/Unlock Switch Connector Terminal
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: Identifying Main Power Window And Door Lock/Unlock Switch Connectors Signal Waveform Graph
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 6: Checking Signal Between Main Power Window And Door Lock/Unlock Switch Connector And Ground With Oscilloscope
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: Replace main power window and door lock/unlock switch.
2. NG: GO TO 6.
CHECK ENCODER CIRCUIT

Turn ignition switch OFF.
Disconnect front power window motor LH and main power window and door lock/unlock switch.
Check continuity between front power window motor LH connector D9 terminal 5 and main power window and door lock/unlock switch connector D7 terminal 13.

5 (G/Y) -13 (G/Y): Continuity should exist.

OK or NG

OK: Replace front power window motor LH.
NG: Repair or replace harness.

Fig 7: Checking Continuity Between Front Power Window Motor LH Connector Terminal And Main Power Window And Door Lock/Unlock Switch Connector Terminal

Courtesy of NISSAN MOTOR CO., U.S.A.