POWER STEERING SYSTEM (for 2AR without Wireless Door Lock), Diagnostic DTC:C1541

DTC Code DTC Name
C1541 Vehicle Speed Signal Malfunction

DESCRIPTION

The power steering ECU assembly receives vehicle speed signals from the brake actuator 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 70 km/h (43 mph) and continues system control.

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 actuator assembly

  • CAN communication system

  • Power steering ECU assembly

INSPECTION PROCEDURE

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 CAN COMMUNICATION SYSTEM

    1. Check if DTC U0129 is output Click here.

      Result
      Result Proceed to
      U0129 is not output A
      U0129 is output B

      Tech Tips

      DTC U0129 indicates a brake actuator assembly communication malfunction in the power steering system.

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. CHECK VEHICLE STABILITY CONTROL SYSTEM

    1. Check for DTCs of the vehicle stability control system Click here.

      OK
      Vehicle stability control system DTCs are not output.
    NG

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE Click here

    OK

    REPLACE POWER STEERING ECU ASSEMBLY Click here