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Home >> Lexus >> 2017 >> NX 300h >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Lane Departure Alert System (W/ Steering Control) - Diagnostic Codes & Circuit 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) 

    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.

    1. Check for DTCs.

      for Manual Tilt and Manual Telescopic Steering Column: Refer to DTC CHECK / CLEAR [09/2017 - 05/2019]

      for Power Tilt and Power Telescopic Steering Column: Refer to DTC CHECK / CLEAR [09/2017 - 05/2019]

      Chassis > EMPS > Trouble Codes 

      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 

    for Manual Tilt and Manual Telescopic Steering Column: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - ]

    for Power Tilt and Power Telescopic Steering Column: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - ]

    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. Perform the following procedure.

      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]