CHECK ENCODER
Check that driver side door glass performs AUTO open/close operation normally by main power window and door lock/unlock switch.
Is the inspection result normal?
YES>>Encoder is OK.
NO>>Refer to Diagnosis Procedure.
CHECK ENCODER SIGNAL
Ignition switch ON.
Check signal between main power window and door lock/unlock switch harness connector and ground with oscilloscope.
| Signal name | (+) | (–) |
Signal (Reference value) | |
|---|---|---|---|---|
| Main power window and door lock/unlock switch | ||||
| Connector | Terminal | |||
| Encoder signal 1 | D7 | 5 | Ground | Refer to following signal |
| Encoder signal 2 | 4 | |||

Is the inspection result normal?
YES>>Replace main power window and door lock/unlock switch. Refer to Removal and Installation.
NO>>GO TO 2.
CHECK ENCODER SIGNAL CIRCUIT
Ignition switch OFF.
Disconnect main power window and door lock/unlock switch connector and front power window motor LH connector.
Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.
| Main power window and door lock/unlock switch | Front power window motor LH | Continuity | ||
|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | |
| D7 | 4 | D9 | 6 | Yes |
| 5 | 5 | |||
Check continuity between main power window and door lock/unlock switch harness connector and ground.
| Main power window and door lock/unlock switch | Ground | Continuity | |
| Connector | Terminal | ||
| D7 | 4 | No | |
| 5 | |||
Is the inspection result normal?
YES>>GO TO 3.
NO>>Repair or replace harness.
CHECK ENCODER POWER SUPPLY
Connect main power window and door lock/unlock switch connector.
Ignition switch ON.
Check voltage between front power window motor LH harness connector and ground.
| (+) | (–) |
Voltage (Approx.) | |
|---|---|---|---|
| Front power window motor LH | |||
| Connector | Terminal | ||
| D9 | 2 | Ground | Battery voltage |
Is the inspection result normal?
YES>>GO TO 5.
NO>>GO TO 4.
CHECK ENCODER POWER SUPPLY CIRCUIT
Ignition switch OFF.
Disconnect main power window and door lock/unlock switch connector.
Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.
| Main power window and door lock/unlock switch | Front power window motor LH | Continuity | ||
|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | |
| D7 | 14 | D9 | 2 | Yes |
Check continuity between main power window and door lock/unlock switch harness connector and ground.
| Main power window and door lock/unlock switch | Ground | Continuity | |
| Connector | Terminal | ||
| D7 | 14 | No | |
Is the inspection result normal?
YES>>Replace main power window and door lock/unlock switch. Refer to Removal and Installation.
NO>>Repair or replace harness.
CHECK GROUND CIRCUIT 1
Ignition switch OFF.
Check continuity between front power window motor LH harness connector and ground.
| Front power window motor LH | Ground | Continuity | |
| Connector | Terminal | ||
| D9 | 4 | Yes | |
Is the inspection result normal?
YES>>Replace front power window motor LH. Refer to Removal and Installation.
NO>>GO TO 6.
CHECK GROUND CIRCUIT 2
Disconnect main power window and door lock/unlock switch connector.
Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.
| Main power window and door lock/unlock switch | Front power window motor LH | Continuity | ||
|---|---|---|---|---|
| Connector | Terminal | Connector | Terminal | |
| D7 | 12 | D9 | 4 | Yes |
Check continuity between main power window and door lock/unlock switch harness connector and ground.
| Main power window and door lock/unlock switch | Ground | Continuity | |
| Connector | Terminal | ||
| D7 | 12 | No | |
Is the inspection result normal?
YES>>Replace main power window and door lock/unlock switch. Refer to Removal and Installation.
NO>>Repair or replace harness.
Power Window Motor. Front Lh
Your vehicle has two types of security systems:
Vehicle security system NISSAN Vehicle Immobilizer SystemThe vehicle security system provides visual and audible alarm signals if someone opens the doors, liftgate or the hood when the system is armed. It is not, however, a motion detection type system that activates when a vehicle is moved or when a vibration occurs.