LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2018 >> Mirai >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Automatic High Beam System - Diagnostic Codes & Circuit Tests >> Automatic High Beam System >> DTC B124B: Automatic High Beam System [11/2018 - ] >> Description

DTC B124B: Automatic High Beam System [11/2018 - ]: Description

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 forward recognition camera.

DTC No. Detection Item DTC Detection Condition Trouble Area
B124B Automatic High Beam System Malfunction in automatic high beam system
  • Pre-collision system
  • Dynamic radar cruise control system
  • Lane control system
  • Road sign assist system*
  • EV control system
  • Electronically controlled brake system
  • CAN communication system
  • Forward recognition camera
  • Main body ECU (multiplex network body ECU)
  1. *: w/ Road Sign Assist System
scientia non olet · About LEMON Manuals