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Home >> Lexus >> 2020 >> ES 300h Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 217 (Lighting System (Ext) (Except Hybrid) - Diagnostic Codes (1 Of 2)) >> LIGHTING SYSTEM (for Gasoline Model) >> DTC B124B: Automatic High Beam System [08/2021 - ] >> Procedure

DTC B124B: Automatic High Beam System [08/2021 - ]: Procedure

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  1. CHECK FOR DTC (HEALTH CHECK) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: System Select / Health Check.
    5. Check for DTCs.

      Result

      Result Proceed to
      Only DTC B124B is output A
      DTC B124B and other DTCs are output B

    Result: 

    GO TO OTHER DTC CHART 

    Result: 

    See step  2

  2. CHECK FRONT CAMERA SYSTEM 
    1. Check if a dynamic radar cruise control system, lane tracing assist system, road sign assist system* or pre-collision system warning message is displayed on the multi-information display.

      Refer to DIAGNOSIS SYSTEM [08/2021 - ]

      OK

      No dynamic radar cruise control system, lane tracing assist system, road sign assist system* or pre-collision system warning messages are displayed.

      1. *: w/ Road Sign Assist System

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to  REMOVAL [08/2021 - 09/2022]  , or refer to  REMOVAL [09/2022 - ] 

    Result: 

    NG 

    GO TO FRONT CAMERA SYSTEM. Refer to  PROBLEM SYMPTOMS TABLE [08/2021 - ]