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Home >> Lexus >> 2021 >> LS 500 Base, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 23 (Front Side Radar Sensor System - Diagnostic Codes) >> Front Side Radar Sensor System >> DTC C1A19-00: Front Side Radar Sensor (Module "B") Beam Axis Misalignment (Horizontal) [10/2023 - ] >> Procedure
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DTC C1A19-00: Front Side Radar Sensor (Module "B") Beam Axis Misalignment (Horizontal) [10/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus LS 500. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK VEHICLE CONDITION 
    1. Check the condition of the front bumper around the front side sensors.

      HINT: 

      When mud, snow, ice, a sticker, etc. is covering the sensor or its surrounding area on the front bumper, the front side sensor may store this DTC by mistake.

      Body Electrical > Front Side Radar "B" > Trouble Codes 

      Result

      Result Proceed to
      A sticker, mud, snow, ice, etc. is covering the sensor or surrounding area on the front bumper. A
      There are scratches or dents on the front bumper around the sensors. B
      No abnormalities.

    Result: 

    REPLACE FRONT SIDE RADAR SENSOR (B). Refer to  REMOVAL [10/2023 - ] 

    Result: 

    See step  2

  2. PERFORM FRONT SIDE RADAR BEAM AXIS CONFIRMATION 
    1. Clear the mud, snow, ice, stickers, etc. from the front bumper.
    2. b. In accordance with the display of the GTS, perform "Front Side Radar "B" Beam Axis Adjustment".

      Body Electrical > Front Side Radar "B" > Utility 

      Tester Display
      Front Side Radar "B" Beam Axis Display

      Body Electrical > Front Side Radar "B" > Utility 

      Tester Display
      Front Side Radar "B" Beam Axis Adjustment

      OK

      Front side radar sensor beam axis display results are within acceptable limits.

      HINT: 

      Before replacing the front side radar sensor (B), visually check for damage to the stud bolts or area surrounding the front side radar sensor (B).

      If there is any damage to the area surrounding the front side radar sensor (B), perform front side radar sensor installation condition inspection and adjust according to the result.

      Refer to DRIVING ADJUSTMENT [10/2023 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    END 

    Result: 

    NG 

    REPLACE FRONT SIDE RADAR SENSOR (B). Refer to  REMOVAL [10/2023 - ]