C1541

POWER STEERING: POWER STEERING SYSTEM: C1541: Vehicle Speed Signal Malfunction

DTC C1541 - Vehicle Speed Signal Malfunction

DESCRIPTION

The power steering ECU receives vehicle speed signals from the skid control ECU via CAN communication. The ECU provides appropriate assisting force in accordance with the vehicle speed, based on the signals.
If the ECU detects this DTC, it adjusts the amount of power assistance for a speed of 100 km/h (62 mph) and continues the system control.






INSPECTION PROCEDURE
NOTICE: If the steering column or power steering ECU has been replaced, perform the rotation angle sensor initialization and torque sensor zero point calibration Programming and Relearning.

PROCEDURE

1. CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)
(a) Check if DTC U0129 is output.
Result:





HINT: DTC U0129 indicates a skid control ECU communication malfunction in the power steering system.

B -- GO TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.
2. CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM)
(a) Check for DTCs of the VSC system.
Result:





HINT: These DTCs indicate a speed sensor signal malfunction in the VSC system.
NOTICE: If replacing the power steering ECU, initialize the rotation angle sensor and calibrate the torque sensor zero point Programming and Relearning.

B -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE
A -- REPLACE POWER STEERING ECU