Toyota CH-R Service Manual: Vehicle Speed Signal (C1541)

DESCRIPTION

The power steering ECU 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

Vehicle speed signals via CAN communication are cut off for 3 seconds or more.

  • Brake control system
  • CAN communication system
  • Power steering ECU assembly

EPS warning light: Comes on

The ECU judges the system has returned to normal or the ignition switch is turned ON again

-

CAUTION / NOTICE / HINT

NOTICE:

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

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PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if DTC U0129 is output.

Click here

Result

Proceed to

DTC U0129 is not output.

A

DTC U0129 is output.

B

B

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

A

2.

CHECK BRAKE CONTROL SYSTEM

(a) Using the Techstream, check for DTCs and confirm that there are no malfunctions in the brake control system.

Click here

Chassis > ABS/VSC/TRAC > Trouble Codes

Result

Proceed to

DTCs are not output.

A

DTCs are output.

B

A

REPLACE POWER STEERING ECU ASSEMBLY

B

GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

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