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 power steering ECU provides appropriate assisting force in accordance with the vehicle speed, based on the signals.

DTC Code

DTC Detection Condition

Trouble Area

C1541

An abnormal vehicle speed signal is received.

  • Speed sensor circuit

  • Skid control ECU

  • CAN communication system

CAUTION / NOTICE / HINT

Note:

If the power steering ECU assembly is replaced, perform the assist map writing (Click here).

PROCEDURE

  1. CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

    1. Check if DTC U0129 is output (Click here).

      Table 1. Result

      Result

      Proceed to

      DTC U0129 is not output.

      A

      DTC U0129 is output.

      B
      Tip:

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

    GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

    (Click here)

  2. CHECK OTHER DTC OUTPUT (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).

      Table 2. Result

      Result

      Proceed to

      DTC is not output.

      A

      DTC is output.

      B

    USE SIMULATION METHOD TO CHECK

    (Click here)

    GO TO VEHICLE STABILITY CONTROL SYSTEM (DIAGNOSTIC TROUBLE CODE CHART)

    (Click here)