DTC B124B: Automatic High Beam System [12/2021 - 11/2024]: Description

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This DTC is stored when the main body ECU (multiplex network body ECU) detects malfunctions in the automatic high beam system.

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 Pre-collision system Hybrid control system (for HV Model) SFI system (for Gasoline Model) Electronically controlled brake system CAN communication system Forward recognition camera Main body ECU (multiplex network body ECU)	Main Body