Toyota CH-R Service Manual: Automatic High Beam System (B124B)

Toyota CH-R Service Manual / Lighting (ext) / Automatic High Beam System / Automatic High Beam System (B124B)

DESCRIPTION

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
B124B	Automatic High Beam System	Malfunction in automatic high beam system	Forward recognition camera system Dynamic radar cruise control system Lane departure alert system Pre-collision system SFI system Vehicle stability control system CAN communication system Forward recognition camera Main body ECU (multiplex network body ECU)

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Confirm that there are no CAN communication system malfunctions before performing the following inspection.
Click here
Before replacing the main body ECU (multiplex network body ECU), refer to registration.*1

*1: w/ Smart Key System

HINT:

If the forward recognition camera stores a DTC for a malfunction of any of the following, this DTC will be stored simultaneously.

Wheel sensor malfunction
Yaw rate sensor malfunction
Steering sensor malfunction
CAN communication lost

PROCEDURE

1.	CHECK FOR DTC (HEALTH CHECK)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Enter the following menus: System Select / Health Check.

(e) Check for DTCs.

Result	Proceed to
Only DTC B124B is output	A
DTC B124B and other DTCs are output	B

GO TO OTHER DTC CHART

2.	CHECK FORWARD RECOGNITION CAMERA SYSTEM

(a) Check if a dynamic radar cruise control system, lane departure alert system and pre-collision system warning message is displayed on the combination meter assembly.

Click here

OK:

No dynamic radar cruise control system, lane departure alert system and pre-collision system warning messages are displayed.

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

GO TO FORWARD RECOGNITION CAMERA SYSTEM

Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART Automatic High Beam System DTC No. Detection Item Link B124B Automatic High Beam System ...

Automatic High Beam Camera (B124C)

DESCRIPTION This DTC is stored when the main body ECU (multiplex network body ECU) detects a malfunction in the forward recognition camera. DTC No. Detection Item ...

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