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Home >> Lexus >> 2021 >> LS 500 Base, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Automatic High Beam System - Diagnostic Codes & Symptom Tests >> Automatic High Beam System >> DTC B124B: Automatic High Beam System [10/2020 - 10/2023] >> Description

DTC B124B: Automatic High Beam System [10/2020 - 10/2023]: Description

  1. *1: for Stereo Camera Type
  2. *2: for Mono Camera Type

The main body ECU (multiplex network body ECU) determines the status of the automatic high beam system based on the automatic high beam system signal from the object recognition camera*1 or forward recognition camera*2.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from
B124B Automatic High Beam System Malfunction in automatic high beam system
  • Front camera system (for Stereo Camera Type)*1
  • Pre-collision system (for Stereo Camera Type)*1
  • Front camera system (for Mono Camera Type)*2
  • Pre-collision system (for Mono Camera Type)*2
  • SFI system
  • Electronically controlled brake system
  • CAN communication system
  • Object recognition camera*1
  • Forward recognition camera*2
  • Main body ECU (multiplex network body ECU)
 Main Body
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