POWER STEERING SYSTEM, Diagnostic DTC:C1541

DTC Code DTC Name
C1541 Vehicle Speed Signal

DESCRIPTION

The power steering ECU assembly receives vehicle speed signals from the brake booster with master cylinder (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 booster with master cylinder (Skid control ECU)

  • CAN communication system

  • Power steering ECU assembly

INSPECTION PROCEDURE

Note

If the power steering ECU assembly has been replaced with a new one, perform assist map writing and rotation angle sensor value initialization torque sensor zero point calibration after performing the initialization of the torque sensor zero point value 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 booster with master cylinder (skid control ECU) communication malfunction in the power steering system.


    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM)


    1. Check for DTCs of the brake control system Click here.

      OK
      Brake control system DTCs are not output.

    NG

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here