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Home >> Lexus >> 2021 >> ES 350 Luxury >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> Parking Support Brake System (Except Hybrid) - Diagnostic Codes >> PARKING SUPPORT BRAKE SYSTEM (for Gasoline Model) >> DTC C1AF9: Blind Spot Monitor Beam Axis Inspection Incomplete [06/2018 - 09/2022] >> Procedure

DTC C1AF9: Blind Spot Monitor Beam Axis Inspection Incomplete [06/2018 - 09/2022]: Procedure

  1. CHECK FOR DTC 
    1. Using the Techstream, check for DTCs according to the prompts on the screen.

      HINT: 

      After turning the engine switch from off to on (IG), wait 4 seconds or more before checking for DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

    2. Clear the DTCs according to the screen on the Techstream.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs 

    3. Recheck for DTCs.

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

      HINT: 

      • DTC C1AF9 is stored when a malfunction signal sent from the blind spot monitor system is detected.
      • If the malfunctioning part has been repaired or replaced before rechecking for DTCs, DTC C1AF9 will not be output again.
      • If DTC C1AF9 is output frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again, even though the DTC was not output when rechecking for DTCs.

        Refer to HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]

      Result

      Result Proceed to
      DTC C1AF9 is output A
      DTC C1AF9 is not output B

    Result: 

    GO TO BLIND SPOT MONITOR SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]