Last Modified: 11-29-2007 1.6 J
Service Category: Steering Section: Power Assist Systems
Model Year: 2008 Model: Sequoia Doc ID: RM000001J01004X
Title: POWER ASSIST SYSTEMS: POWER STEERING SYSTEM: DESCRIPTION (2008 Sequoia)

Power Steering ECU Communication Circuit

DESCRIPTION

The power steering ECU obtains the steering angle signal, the steering zero point memory, the vehicle speed signal, and the engine speed signal through the CAN communication system, and controls the output current to the power steering solenoid valve based on these signals.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if the CAN communication system DTC is output NETWORKING: CAN COMMUNICATION SYSTEM: DIAGNOSIS SYSTEM (2008 Sequoia) .

Result

Result

Proceed to

DTC not output

A

DTC output

B
A

2.

CHECK VEHICLE STABILITY CONTROL SYSTEM

(a) Check if the vehicle stability control system DTC is output BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DTC CHECK / CLEAR (2008 Sequoia) .

Result

Result

Proceed to

DTC not output

A

DTC output

B
A

3.

CHECK SFI SYSTEM

(a) Check if the SFI system DTC is output

3UR-FE ENGINE CONTROL: SFI SYSTEM: DTC CHECK / CLEAR (2008 Sequoia) for 3UR-FE)

2UZ-FE ENGINE CONTROL: SFI SYSTEM: DTC CHECK / CLEAR (2008 Sequoia) for 2UZ-FE).

Result

Result

Proceed to

DTC not output

A

DTC output (3UR-FE)

B

DTC output (2UZ-FE)

C
A