C1541

POWER ASSIST SYSTEMS: POWER STEERING SYSTEM (for 2GR-FE): C1541: Vehicle Speed Signal Malfunction
C1541 - Vehicle Speed Signal Malfunction

DESCRIPTION

The power steering ECU assembly receives vehicle speed signals from the brake actuator assembly 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 140 km/h (87 mph) and continues system control.





INSPECTION PROCEDURE

NOTICE:
If the power steering ECU assembly has been replaced, perform assist map writing Programming and Relearning.

PROCEDURE

1. CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Check if DTC U0129 is output Reading and Clearing Diagnostic Trouble Codes.

Result:





HINT
DTC U0129 indicates a brake actuator assembly communication malfunction in the power steering system.

B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

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

(a) Check for vehicle stability control system DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

Vehicle stability control system DTCs are not output.

NG -- REPAIR CIRCUIT INDICATED BY OUTPUT CODE Vehicle Stability Control System

OK -- REPLACE POWER STEERING ECU ASSEMBLY Removal