DTC B124B: Automatic High Beam System [08/2020 - 12/2021]: Procedure
WARNING: This page is about a different car, the 2025 Toyota RAV4, 2024 Toyota RAV4, 2023 Toyota RAV4, 2022 Toyota RAV4, and 2021 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK FOR DTC (HEALTH CHECK)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON.
- Turn the Techstream on.
- Enter the following menus: System Select / Health Check.
- Check for DTCs.
Result
Result Proceed to Only DTC B124B is output A DTC B124B and other DTCs are output B
Result:
B
GO TO OTHER DTC CHART
Result:
A
See step 2
- CHECK FRONT CAMERA SYSTEM
- Check if a dynamic radar cruise control system, lane control system or pre-collision system warning message is displayed on the multi-information display.
Refer to DIAGNOSIS SYSTEM [11/2018 - 12/2021]
OK
No dynamic radar cruise control system, lane control system, road sign assist system and pre-collision system warning messages are displayed.
Result
Proceed to OK NG
Result:
OK
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
Refer to REMOVAL [08/2020 - 12/2021]
Result:
NG
GO TO FRONT CAMERA SYSTEM
- Check if a dynamic radar cruise control system, lane control system or pre-collision system warning message is displayed on the multi-information display.