C1541

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

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Check if DTC U0129 is output Power Steering System.

Result





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

B -- GO TO DTC U0129 TROUBLE CODE CHART U0129
A -- Continue to next step.

2. CHECK ELECTRONICALLY CONTROLLED BRAKE SYSTEM

(a) Using the Techstream, check for DTCs and confirm that there are no problems in the electronically controlled brake system Reading and Clearing Diagnostic Trouble Codes.

Result





NOTICE:
If replacing the power steering ECU, initialize the rotation angle sensor value and calibrate the torque sensor zero point Power Steering System.

B -- GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (SPEED SENSOR CIRCUIT) How To Proceed With Troubleshooting

A -- REPLACE POWER STEERING ECU Removal