Lexus ES manuals

Lexus ES: Vehicle Speed Signal (C1541)

Lexus ES (XZ10) Service Manual / Steering / Power Assist Systems / Power Steering System(for Gasoline Model) / Vehicle Speed Signal (C1541)

DESCRIPTION

The power steering ECU (rack and pinion power steering gear assembly) receives vehicle speed signals from the skid control ECU (brake actuator assembly) via CAN communication. The ECU provides appropriate assist force in accordance with the vehicle speed based on the signals.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Return-to-normal Condition

Note

C1541

Vehicle Speed Signal

A vehicle speed signal malfunction is detected
  • Brake control system
  • CAN communication system

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

CAUTION / NOTICE / HINT

NOTICE:

If the rack and pinion power steering gear assembly has been replaced, perform assist map writing and torque sensor zero point calibration.

Click here

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if DTC U0129 is output.

Chassis > EMPS > Trouble Codes

Result

Proceed to

DTC U0129 is not output.

A

DTC U0129 is output.

B
A

GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

B

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

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