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 Code 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

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK CAN COMMUNICATION SYSTEM


    1. Check if DTC U0129 is output Click here.

      Result
      Result 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 power steering system.


    B

    GO TO DTC U0129 TROUBLE CODE CHART Click here

    A

  2. CHECK ELECTRONICALLY CONTROLLED BRAKE SYSTEM


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

      Result
      Result 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.


    B

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (SPEED SENSOR CIRCUIT) Click here

    A

    REPLACE POWER STEERING ECU Click here