Toyota Venza: Vehicle Speed Signal Malfunction (C1541)

Toyota Venza Service Manual / Power Assist Systems / Power Steering System / Vehicle Speed Signal Malfunction (C1541)

DESCRIPTION

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

DTC No.	DTC Detection Condition	Trouble Area
C1541	This DTC is detected when vehicle speed signals via CAN communication are cut off for 3 seconds or more.	Speed sensor circuit Brake actuator assembly (Skid control ECU) CAN communication system Power steering ECU

CAUTION / NOTICE / HINT

NOTICE:

If the power steering ECU has been replaced with a new one, perform the rotation angle sensor initialization and torque sensor zero point calibration (See page ).

PROCEDURE

1.	CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Check if DTC U0129 is output (See page
).

Result	Proceed to
No output	A
U0129 is output	B

HINT:

DTC U0129 indicates an brake actuator assembly (skid control ECU) communication malfunction in the power steering system.

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK OTHER DTC OUTPUT (VEHICLE STABILITY CONTROL SYSTEM)

(a) Using the Techstream, check for DTCs and confirm that there are no problems in the vehicle stability control system (See page ).

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

REPLACE POWER STEERING ECU

REPAIR CIRCUIT INDICATED BY OUTPUT CODE

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DESCRIPTION The motor rotation angle sensor detects the motor rotation angle and sends this information to the power steering ECU. DTC No. DTC Detection Condition ...

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DESCRIPTION The power steering ECU supplies current to the power steering motor through the motor circuit. DTC No. DTC Detection Condition Trouble Area ...

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