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Home >> Lexus >> 2021 >> NX 300 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Lane Departure Alert System (W/ Steering Control) - Diagnostic Codes & Symptom Tests >> LANE DEPARTURE ALERT SYSTEM (w/ Steering Control) >> DTC C1A70: Power Steering Control System [09/2017 - 05/2019] >> Procedure
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DTC C1A70: Power Steering Control System [09/2017 - 05/2019]: Procedure

  1. CHECK FOR DTCs (POWER STEERING SYSTEM) 
    1. Check for DTCs.

      Chassis > EMPS > Trouble Codes 

      HINT: 

      Lane departure alert system (w/ steering control) DTC C1A70 may be stored due to a malfunction in the power steering system. Therefore it is necessary to check for and troubleshoot power steering system DTCs first.

      Result

      Result Proceed to
      Power steering system DTCs are not output A
      Power steering system DTCs are output B

    Result: 

    GO TO POWER STEERING SYSTEM 

    Result: 

    See step  2

  2. CHECK FOR DTCs 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [09/2017 - 05/2019]

      Chassis > LKA/LDA > Clear DTCs 

    2. Make sure that the DTC detection conditions are met.

      HINT: 

      If the conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [09/2017 - 05/2019]

      Chassis > LKA/LDA > Trouble Codes 

      Result

      Result Proceed to
      DTC C1A70 is not output A
      DTC C1A70 is output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - 05/2019] 

    Result: 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  REMOVAL [09/2017 - 05/2019]