DTC B124B: Automatic High Beam System [06/2018 - 09/2022]: Description

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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 SFI system Electronically controlled brake system CAN communication system Forward recognition camera Main body ECU (multiplex network body ECU)	Main Body

*: w/ Road Sign Assist System