POWER STEERING SYSTEM, Diagnostic DTC:C1541

DTC Code DTC Name
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.

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

  • Skid control ECU

  • CAN communication system

  • Power steering ECU

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if DTC U0129 is output Click here.

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

      Tech Tips

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


    B

    GO TO DTC U0129 TROUBLE CODE CHART Click here

    A

  2. CHECK BRAKE CONTROL SYSTEM


    1. Using the intelligent tester, check for DTCs and confirm that there are no problems in the brake control system Click here.

      Result
      DTC Condition Proceed to
      DTC is not output A
      DTC is output B

      Note

      If replacing the power steering ECU, initialize the rotation angle sensor value and calibrate the torque sensor zero point Click here.


    A

    REPLACE POWER STEERING ECU Click here

    B

    GO TO BRAKE CONTROL SYSTEM (SPEED SENSOR CIRCUIT) Click here