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DTC C1231: Lost Communication with Steering Angle Sensor Module [08/2015 - 08/2017]: Procedure

  1. CHECK OTHER DTC OUTPUT (CAN COMMUNICATION SYSTEM) 
    1. Check if DTC U0073 is output. Refer to DTC CHECK / CLEAR [08/2015 - 08/2019] .
      RESULT

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

      HINT: 

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

    Result: 

    REPAIR CIRCUIT INDICATED BY OUTPUTCODE 

    (Refer to DTC U0073: Control Module Communication Bus Off [08/2015 - 08/2017] )

    Result: 

    See step  2

  2. CHECK OTHER DTC OUTPUT (BRAKE CONTROL SYSTEM) 
    1. Using the Techstream, check for DTCs related to the steering angle sensor and confirm that there are no problems in the brake control system (Refer to DTC CHECK / CLEAR [08/2015 - 08/2017] ).
      RESULT

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

    Result: 

    REPLACE POWER STEERING ECU ASSEMBLY 

    (Refer to REMOVAL [08/2015 - 08/2019] )

    Result: 

    GO TO VEHICLE STABILITY CONTROL SYSTEM 

    (Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2015 - 08/2017] )