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POWER STEERING SYSTEM, Diagnostic DTC:C1541

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DTC Code DTC Name
C1541 Vehicle Speed Signal
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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.

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

  • Brake control system

  • CAN communication system

  • Power steering ECU assembly
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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).

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PROCEDURE


  1. Click here

    CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)


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

      Result
      Result Proceed to
      U0129 is not output. A
      U0129 is output (w/ Central Gateway ECU). B
      U0129 is output (w/o Central Gateway ECU). C
      Tip:

      DTC U0129 indicates a skid control ECU (brake booster with master cylinder assembly) communication malfunction in the power steering system.


    • AClick here
    • B

      GO TO CAN COMMUNICATION SYSTEM (w/ Central Gateway ECU) (Click here)

    • C

      GO TO CAN COMMUNICATION SYSTEM (w/o Central Gateway ECU) (Click here)

  2. Click here

    CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM)


    1. Check for DTCs of the brake control system (Click here).

      Table 1. Result
      Result Proceed to
      DTCs are not output (for Manual tilt and manual telescopic steering column). A
      DTCs are not output (for Power tilt and power telescopic steering column). B
      DTCs are output. C

    • A

      REPLACE POWER STEERING ECU ASSEMBLY (Click here)

    • B

      REPLACE POWER STEERING ECU ASSEMBLY (Click here)

    • C

      REPAIR CIRCUIT INDICATED BY OUTPUT CODE (Click here)