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

Toyota CH-R Service Manual / Power Assist Systems / Power Steering System / 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.

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Result	Proceed to
DTC U0129 is not output.	A
DTC U0129 is output.	B

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

2.	CHECK BRAKE CONTROL SYSTEM

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

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Chassis > ABS/VSC/TRAC > Trouble Codes

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

REPLACE POWER STEERING ECU ASSEMBLY

GO TO BRAKE CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

Error in Matching of ECUs (C1567)

DESCRIPTION Based on the steering sensor signal, the power steering ECU assembly determines if the correct type of steering sensor is installed. DTC No. Detection Item ...

Short in Motor Circuit (C1521-C1523,C1528,C1531-C1555)

DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Return-to-normal Condition Note ...

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