Encoder Circuit Check

1. Ignition switch ON.
2. Check signal between main power window and door lock/unlock switch connector and ground with oscilloscope.

   Signal name	(+)		(-)	Signal (Reference value)
   	Main power window and door lock/unlock switch
   	Connector	Terminal
   Encoder signal 1	D7	13	Ground	Refer to following signal
   Encoder signal 2		9

   Courtesy of NISSAN NORTH AMERICA, INC.

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

GO TO 2.

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

   (+)		(-)	Voltage (Approx.)
   Front power window motor LH
   Connector	Terminal
   D9	2	Ground	Battery voltage

Is the measurement value within the specification?

YES

GO TO 4.

NO

GO TO 3.

1. 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 and front power window motor LH connector.

   Main power window and door lock/unlock switch		Front power window motor LH		Continuity
   Connector	Terminal	Connector	Terminal
   D7	5	D9	2	Yes

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

   Main power window and door lock/unlock switch		-	Continuity
   Connector	Terminal
   D7	5	Ground	No

Is the inspection result normal?

YES

Replace main power window and door lock/unlock switch. Refer to Removal and Installation . After that, refer to Work Procedure .

NO

Repair or replace the harness or connectors.

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

   Front power window motor LH		-	Continuity
   Connector	Terminal
   D9	4	Ground	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 and front power window motor LH connector.

   Main power window and door lock/unlock switch		Front power window motor LH		Continuity
   Connector	Terminal	Connector	Terminal
   D7	14	D9	4	Yes

Is the inspection result normal?

YES

Replace main power window and door lock/unlock switch. Refer to Removal and Installation . After that, refer to Work Procedure .

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 and door lock/unlock switch connector and front power window motor LH connector.

   Main power window and door lock/unlock switch		Front power window motor LH		Continuity
   Connector	Terminal	Connector	Terminal
   D7	13	D9	5	Yes
   	9		6

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

   Main power window and door lock/unlock switch		-	Continuity
   Connector	Terminal
   D7	13	Ground	No
   	9

Is the inspection result normal?

YES

Replace front power window motor LH. Refer to Removal and Installation - Front Regulator . After that, refer to Work Procedure .

NO

Repair or replace the harness or connectors.