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Home >> Toyota >> 2020 >> Corolla L >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 138 (Lighting System (HEV) - Diagnostic Codes, Symptom Tests & Circuit Tests) >> LIGHTING SYSTEM (for HV Model) >> DTC B124B: Automatic High Beam System [01/2019 - 09/2022] >> Description

DTC B124B: Automatic High Beam System [01/2019 - 09/2022]: Description

WARNING: This page is about a different variant/trim than selected.

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 DTC Output from
B124B Automatic High Beam System Malfunction in automatic high beam system
  • Front camera system
  • Dynamic radar cruise control system
  • Lane control system
  • Road sign assist system*
  • Pre-collision system
  • Hybrid control system
  • Electronically controlled brake system
  • CAN communication system
  • Forward recognition camera
  • Main body ECU (multiplex network body ECU)
 Main Body
  1. *: w/ Road Sign Assist System
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