WARNING: This page is about a different car, the 2004 Nissan Titan. 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 OFF.
2. Disconnect front power window motor LH.
3. Turn ignition switch ON.
4. Check voltage between front power window motor LH connector D9 terminal 4 and ground.
  4 (BR) - 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 Connector Terminal And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch.
3. Check continuity between front power window motor LH connector D9 terminal 4 and main power window and door lock/unlock switch connector D7 terminal 15.
  4 (BR) - 15 (BR): Continuity should exist.
Fig 2: Checking Continuity Between Front Power Window Motor And Main Power Window Connector Terminal
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: Replace main power window and door lock/unlock switch.
2. NG: Repair or replace harness.
CHECK ENCODER GROUND
1. Disconnect front power window motor LH.
2. Check continuity between front power window motor LH connector D9 terminal 6 and ground.
  6 (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 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 6 and main power window and door lock/unlock switch connector D7 terminal 2.
  6 (W/B) - 2 (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 And Main Power Window 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: Connector Condition Signal Specification
Courtesy of NISSAN MOTOR CO., U.S.A.

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.

Safety Warning

Encoder Circuit Check Front LH/Crew Cab

Use the Manual With the Right Hardware

When to See a Mechanic

Rather have a pro handle this?