Encoder Circuit Check

1. Connect front power window motor LH.
2. Turn ignition switch ON.
3. Check signal between main power window and door lock/unlock switch connector D23 and ground with oscilloscope.

   Signal name	Terminals			Signal (Reference value)
   	(+)		(-)
   	Main power window and door lock/unlock switch connector	Terminal
   Encoder signal 1	D23	5	Ground	Refer to following signal
   Encoder signal 2		4

   Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

GO TO 2 .

1. Turn ignition switch ON.
2. Check voltage between front power window motor LH connector D9 and ground.

   Terminal			Voltage (Approx.)
   (+)		(-)
   Front power window motor LH connector	Terminal
   D9	4	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO 4 .

NO

GO TO 3 .

1. Turn ignition switch OFF.
2. Disconnect main power window and door lock/unlock switch and front power window motor LH.
3. Check continuity between main power window and door lock/unlock switch connector D23 and front power window motor connector D9.

   Main power window and door lock/unlock switch connector	Terminal	Front power window motor LH connector	Terminal	Continuity
   D23	14	D9	4	Yes

4. Check continuity between main power window and door lock/unlock switch connector D23 and ground.

   Main power window and door lock/unlock switch connector	Terminal	Ground	Continuity
   D23	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 or connectors.

1. Turn ignition switch OFF.
2. Disconnect front power window motor LH.
3. Check continuity between front power window motor LH connector D9 and ground.

   Front power window motor LH connector	Terminal	Ground	Continuity
   D9	6		Yes

Is the inspection result normal?

YES

GO TO 6 .

NO

GO TO 5 .

1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between main power window and door lock/unlock switch connector D23 and front power window motor LH connector D9.

   Main power window and door lock/unlock switch connector	Terminal	Front power window motor LH connector	Terminal	Continuity
   D23	12	D9	6	Yes

Is the inspection result normal?

YES

Check main power window and door lock/unlock switch. Refer to Component Inspection .

NO

Repair or replace the harness or connectors.

1. Disconnect main power window and door lock/unlock switch.
2. Check continuity between main power window D23 and door lock/unlock switch connector and front power window motor LH connector D9.

   Main power window and door lock/unlock switch connector	Terminal	Front power window motor LH connector	Terminal	Continuity
   D23	5	D9	3	Yes
   	4		5

3. Check continuity between main power window and door lock/unlock switch connector D23 and ground.

   Main power window and door lock/unlock switch connector	Terminal	Ground	Continuity
   D23	5		No
   	4

Is the inspection result normal?

YES

Replace front power window motor LH. Refer to Removal and Installation .

NO

Repair or replace harness or connectors.