DTC B124B: Automatic High Beam System [01/2019 - 09/2022]: Procedure
WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, and 2020 Toyota Corolla. 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 power switch on (IG).
- 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, road sign assist system* or pre-collision system warning message is displayed on the multi-information display.
Refer to DIAGNOSIS SYSTEM [01/2019 - 09/2022]
OK
No dynamic radar cruise control system, lane control system, road sign assist system* or pre-collision system warning messages are displayed.
- *: w/ Road Sign Assist System
Result
Proceed to OK NG
Result:
OK
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU). Refer to REMOVAL [01/2019 - 03/2019] , or refer to REMOVAL [03/2019 - 09/2022]
Result:
NG
GO TO FRONT CAMERA SYSTEM. Refer to PROBLEM SYMPTOMS TABLE [01/2019 - 09/2022]
- Check if a dynamic radar cruise control system, lane control system, road sign assist system* or pre-collision system warning message is displayed on the multi-information display.