Last Modified: 01-30-2024 6.11:8.1.0 Doc ID: RM1000000021GSK
Model Year Start: 2022 Model: RAV4 Prod Date Range: [12/2021 -           ]
Title: LIGHTING (EXT): AUTOMATIC HIGH BEAM SYSTEM: B124B; Automatic High Beam System; 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]

DTC

B124B

Automatic High Beam System

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

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Confirm that there are no CAN communication system malfunctions before performing the following inspection.

    Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; LIGHTING (EXT): AUTOMATIC HIGH BEAM SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

  • w/ Smart Key System:

    Before replacing the main body ECU (multiplex network body ECU), refer to registration.

    for HV Model:

    Click here 2022 - 2024 MY RAV4 HV [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, HV Model): REGISTRATION

    for Gasoline Model:

    Click here 2022 - 2024 MY RAV4 [12/2021 -        ]; THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Start Function, Gasoline Model): REGISTRATION

HINT:

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

  • Speed 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 FRONT CAMERA SYSTEM

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

Click here 2022 - 2024 MY RAV4 RAV4 HV [12/2021 -        ]; CRUISE CONTROL: FRONT CAMERA SYSTEM: DIAGNOSIS SYSTEM

OK:

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

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2023 MY RAV4 RAV4 HV [10/2022 - 10/2023]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2024 MY RAV4 RAV4 HV [10/2023 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

NG

GO TO FRONT CAMERA SYSTEM 2022 MY RAV4 RAV4 HV [12/2021 - 10/2022]; CRUISE CONTROL: FRONT CAMERA SYSTEM: PROBLEM SYMPTOMS TABLE 2023 - 2024 MY RAV4 RAV4 HV [10/2022 -        ]; CRUISE CONTROL: FRONT CAMERA SYSTEM: PROBLEM SYMPTOMS TABLE