POWER STEERING SYSTEM (for 2GR-FE), Diagnostic DTC:C1541

DTC Code DTC Name
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.

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

  • CAN communication system

  • Power steering ECU assembly

INSPECTION PROCEDURE

Note

If the power steering ECU assembly has been replaced, perform assist map writing Click here.

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)


    1. Check if DTC U0129 is output Click here.

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

      Tech Tips

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


    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

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


    1. Check for vehicle stability control system DTCs Click here.

      OK
      Vehicle stability control system DTCs are not output.

    NG

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here