Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK ENCODER OPERATION
   1. Turn ignition switch ON.
   2. Check signal between main power window and door lock/unlock switch connector D7 terminal 3 and ground with oscilloscope.

      Main power window and door lock/unlock switch		Ground	Signal (Reference value)
      Connector	Terminal
      D7	3	-

      Is the inspection result normal? 

      YES: Replace main power window and door lock/unlock switch. Refer to "REMOVAL AND INSTALLATION ".

      NO: GO TO 2

2. CHECK ENCODER SIGNAL CIRCUIT
   1. Turn ignition switch OFF.
   2. Disconnect main power window and door lock/unlock switch and front power window motor LH connectors.
   3. Check continuity between main power window and door lock/unlock switch connector D7 terminal 3 and front power window motor LH connector D9 terminal 5.

      Main power window and door lock/unlock switch		Front power window motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      D7	3	D9	5	Yes

   4. Check continuity between main power window and door lock/unlock switch connector D7 terminal 3 and ground.

      Main power window and door lock/unlock switch		Ground	Continuity
      Connector	Terminal
      D7	3	-	No

      Is the inspection result normal? 

      YES: GO TO 3

      NO: Repair or replace harness.

3. CHECK ENCODER POWER
   1. Connect main power window and door lock/unlock switch connector.
   2. Turn ignition switch ON.
   3. Check voltage between front power window motor LH connector D9 terminal 2 and ground.

      Front power window motor LH		Ground	Voltage
      Connector	Terminal
      D9	2	-	Battery voltage

      Is the inspection result normal? 

      YES: GO TO  5

      NO: GO TO 4

4. CHECK ENCODER POWER CIRCUIT
   1. Turn ignition switch OFF.
   2. Disconnect main power window and door lock/unlock switch.
   3. Check continuity between main power window and door lock/unlock switch connector D7 terminal 4 and front power window motor LH connector D9 terminal 2.

      Main power window and door lock/unlock switch		Front power window motor LH		Continuity
      Connector	Terminal	Connector	Terminal
      D7	4	D9	2	Yes

   4. Check continuity between main power window and door lock/unlock switch connector D7 terminal 4 and ground.

      Main power window and door lock/unlock switch		Ground	Continuity
      Connector	Terminal
      D7	4	-	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.

5. CHECK ENCODER GROUND
   1. Turn ignition switch OFF.
   2. Check continuity between front power window motor LH connector D9 terminal 4 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: Repair or replace harness.