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 skid control ECU (brake actuator assembly) via CAN communication. The ECU provides appropriate assist force in accordance with the vehicle speed, based on the signals.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Warning Indicate

Return-to-normal Condition

Note

C1541

Vehicle Speed Signal

This DTC is detected when vehicle speed signals via CAN communication are cut off for 3 seconds or more.

  • Speed sensor circuit

  • Brake control system

  • CAN communication system

  • Power steering ECU assembly

EPS Warning Light: Comes on

After normal confirmation

-

CAUTION / NOTICE / HINT

Note:

If the power steering ECU assembly has been replaced with a new one, perform assist map writing and torque sensor zero point calibration.

Click here

PROCEDURE

  1. CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)

    1. Check if DTC U0129 is output.

      Click here

      Chassis > EMPS > Trouble Codes

      Result

      Result

      Proceed to

      U0129 is not output.

      A

      U0129 is output.

      B
      Tip:

      DTC U0129 indicates a skid control ECU (brake actuator assembly) communication malfunction in the power steering system.

    B

    GO TO CAN COMMUNICATION SYSTEM

    w/ Central Gateway ECU:Click here

    w/o Central Gateway ECU:Click here

    A

  2. CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM)

    1. Check for DTCs of the brake control system.

      Click here

      Chassis > ABS/VSC/TRC > Trouble Codes

      Result

      Result

      Proceed to

      DTCs are not output.

      A

      DTCs are output.

      B
    A

    REPLACE POWER STEERING ECU ASSEMBLY

    Click here

    B

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE