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Home >> Lexus >> 2021 >> RC 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Lane Departure Alert System (W/ Steering Control) - Diagnostic Codes & Circuit Tests >> LANE DEPARTURE ALERT SYSTEM (w/ Steering Control) >> DTC C1A47: Steering Angle Sensor [11/2017 - 09/2020] >> Procedure

DTC C1A47: Steering Angle Sensor [11/2017 - 09/2020]: Procedure

  1. CHECK FOR DTCs (VEHICLE STABILITY CONTROL SYSTEM) 

    HINT: 

    Lane departure alert system (w/ steering control) DTC C1A47 may be stored due to a malfunction in the vehicle stability control system. Therefore it is necessary to check for and troubleshoot vehicle stability control system DTCs first.

    1. Check for DTCs.

      Refer to DTC CHECK / CLEAR [11/2017 - 09/2020]

      Chassis > ABS/VSC/TRAC > Trouble Codes 

      Result

      Result Proceed to
      Vehicle stability control system DTCs are not output A
      Vehicle stability control system DTCs are output B

    Result: 

    GO TO VEHICLE STABILITY CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 09/2020] 

    Result: 

    See step  2

  2. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM (w/ Steering Control)) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [11/2017 - 10/2022]

      Chassis > LKA/LDA > Clear DTCs 

    2. Perform the following procedure.

      HINT: 

      If the following procedure is not performed, the previously output DTC cannot be detected.

      1. Turn the engine switch on (IG) and wait 7 seconds or more.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [11/2017 - 10/2022]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC C1A47 is not output A
      DTC C1A47 is output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2017 - 10/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 11/2019]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2019 - 09/2020] 

    Result: 

    See step  3

  3. REPLACE FORWARD RECOGNITION CAMERA 
    1. Replace the forward recognition camera.

      Refer to REMOVAL [11/2017 - 10/2022]

    2. Perform forward recognition camera adjustment.

      Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [11/2017 - 10/2022]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK FOR DTCs (LANE DEPARTURE ALERT SYSTEM (w/ Steering Control)) 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [11/2017 - 10/2022]

      Chassis > LKA/LDA > Clear DTCs 

    2. Perform the following procedure.

      HINT: 

      If the following procedure is not performed, the previously output DTC cannot be detected.

      1. Turn the engine switch on (IG) and wait 7 seconds or more.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [11/2017 - 10/2022]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC C1A47 is not output A
      DTC C1A47 is output B

    Result: 

    END (FORWARD RECOGNITION CAMERA WAS DEFECTIVE) 

    Result: 

    REPLACE STEERING SENSOR. Refer to  COMPONENTS [09/2014 - ]