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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Lighting System (Ext) - Diagnostic Codes (1 Of 2) >> Lighting System >> DTC B124B: Automatic High Beam System [10/2017 - 09/2018] >> Description

DTC B124B: Automatic High Beam System [10/2017 - 09/2018]: Description

  1. *1: w/ AFS (Front-lighting Adaptive System)
  2. *2: w/o AFS (Front-lighting Adaptive System)

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 Note
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
  • Hybrid control 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 ECU (multiplex network body ECU) -
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