POWER STEERING SYSTEM (w/ VSC), Diagnostic DTC:C1231

DTC Code DTC Name
C1231 Lost Communication with Steering Angle Sensor Module

DESCRIPTION

The power steering ECU receives steering angle signals from the steering angle sensor via CAN communication. The power steering ECU provides appropriate assisting force in accordance with the steering angle signal.

DTC Code DTC Detection Condition Trouble Area
C1231 An abnormal steering angle signal is received.

  • Steering angle sensor (Spiral cable sub-assembly)

  • CAN communication system

  • Power steering ECU assembly

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM)


    1. Check if DTC U0073 is output Click here.

      Result
      Result Proceed to
      DTC U0073 is not output. A
      DTC U0073 is output. B

      Tech Tips

      DTC U0073 indicates a CAN communication malfunction in the power steering system.


    B

    REPAIR CIRCUIT INDICATED BY OUTPUT CODE Click here

    A

  2. CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM)


    1. Using the intelligent tester, check for DTCs related to the steering angle sensor and confirm that there are no problems in the brake control system Click here for Hydraulic Brake Booster, Click here for Vacuum Brake Booster).

      Result
      Result Proceed to
      DTC is not output. A
      DTC is output. for Hydraulic Brake Booster B
      for Vacuum Brake Booster C

    B

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

    C

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

    A

    REPLACE POWER STEERING ECU ASSEMBLY Click here