Toyota Sienna Service Manual: Reclining Motor Circuit

Toyota Sienna Service Manual / Seat / Rear no. 2 Seat assembly (w/ Power Stowing Function) / On-vehicle inspection / Reclining Motor Circuit

DESCRIPTION

The fold seat control ECU receives a switch operation signal from the power rear no. 2 seat switch and the fold seat switch, and activates the reclining motor. At this time, the Hall IC (seatback position sensor) detects the actuation of the seatback and sends a seatback actuation signal to the fold seat control ECU.

The fold seat control ECU uses signals from the Hall IC (seatback position sensor) to detect if an object is caught or if any other abnormal condition has occurred.

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 INSPECT FOLD SEAT CONTROL ECU

INSPECT FOLD SEAT CONTROL ECU

Remove the fold seat control ECU with connectors still connected.
Measure the voltage according to the value(s) in the table below.

Standard voltage: LH side

Standard voltage

RH side

Standard voltage

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

CHECK HARNESS AND CONNECTOR

Disconnect the connectors from the fold seat control ECU.

CHECK HARNESS AND CONNECTOR

Disconnect the connectors from the reclining motor.
Measure the resistance according to the value(s) in the table below.

Standard resistance: LH side

Standard resistance

RH side

Standard resistance

3 INSPECT RECLINING MOTOR

INSPECT RECLINING MOTOR

Check reclining motor operation.

Check if the motor rotates smoothly when the battery is connected to the reclining motor.

OK: LH side

RH side

REPLACE FOLD SEAT CONTROL ECU

Folding Motor Circuit

DESCRIPTION The fold seat control ECU receives a switch operation signal from the fold seat switch and activates the folding motor. At this time, the Hall IC (seat cushion position sensor) detects ...

Release Actuator Circuit

DESCRIPTION The fold seat control ECU receives a switch operation signal from the fold seat switch and activates the release actuator. The release actuator releases the lock of the stowed seat b ...

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