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.

(c) Turn the Techstream 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
B

GO TO OTHER DTC CHART
A

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.

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

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 ...

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    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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