Toyota Sienna Service Manual: Manual Up / Down Function does not Operate on Rear LH Only

DESCRIPTION

If the manual UP/DOWN function does not operate, the power window motor, the regulator switch or the wire harness may be malfunctioning.

WIRING DIAGRAM

INSPECTION PROCEDURE

1 CHECK WIRE HARNESS (POWER SOURCE)

1. Disconnect the P38 regulator switch connector.
2.  Turn the ignition switch ON.
3.  Check the voltage between the terminal 4 of the wire harness side connector and the body ground.

Standard voltage

2 INSPECT POWER WINDOW REGULATOR SWITCH (REAR LH)

1. Remove the regulator switch.
2.  Check the resistance between the switch terminals when the switch is operated, as shown in the table below.

Standard resistance

3 CHECK WIRE HARNESS (REGULATOR SWITCH - MOTOR) (REGULATOR SWITCH - BODY GROUND)

1. Disconnect the P42 motor connector.
2.  Check the resistance between the wire harness side connectors.

Standard resistance

3. Check the resistance between the P38 regulator switch connector and body ground.

Standard resistance

4 INSPECT POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH)

1. Remove the motor.
2.  Apply battery voltage to connector terminals 1 and 2.
3.  Check that the motor smoothly rotates.

NOTICE: Do not apply battery voltage to any terminals except terminals 1 and 2.

Standard

REPAIR OR REPLACE HARNESS AND CONNECTOR (MASTER SWITCH - REGULATOR SWITCH)