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 booster with master cylinder assembly) via CAN communication. The ECU provides appropriate assist force in accordance with the vehicle speed, based on the signals.

If the ECU detects this DTC, it adjusts the amount of power assistance for a speed of 100 km/h (62 mph) and continues system control.

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

      Tech Tips

      DTC U0129 indicates a skid control ECU (brake booster with master cylinder assembly) 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


      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 Click here