Toyota Sienna Service Manual: Rear Power Seat Switch Circuit

DESCRIPTION

When the power rear no. 2 seat switch is operated, a recline signal is sent to the fold seat control ECU.

The ECU activates the reclining motor based on the signal from the power rear no. 2 seat switch.

WIRING DIAGRAM

INSPECTION PROCEDURE

1 INSPECT FOLD SEAT CONTROL ECU

1. Remove the fold seat control ECU.
2.  Measure the voltage according to the value(s) in the table below.

Standard voltage: LH side

RH side

2 CHECK HARNESS AND CONNECTOR (FOLD SEAT CONTROL ECU - FOLDING MOTOR)

1. Disconnect the connectors from the fold seat control ECU.
2.  Disconnect the connector from the folding motor.
3. Measure the resistance according to the value(s) in the table below.

Standard resistance: LH side

RH side

3 INSPECT POWER REAR NO. 2 SEAT SWITCH

1. Disconnect the connector from the power rear no. 2 seat switch.
2. Measure the resistance according to the value(s) in the table below.

Standard resistance: LH side

RH side

4 CHECK HARNESS AND CONNECTOR (FOLDING MOTOR - BODY GROUND)

1. Measure the resistance according to the value(s) in the table below.

Standard resistance: LH side

RH side

5 REPAIR OR REPLACE HARNESS OR CONNECTOR (WIRE INSIDE SEAT)

1. Repair or replace harness or connector (wire inside seat) and check that the malfunction disappears.

OK: Malfunction disappears.

END