Note
Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Learning.
Tech Tips
Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Automatic high beam indicator on the combination meter assembly does not illuminate | Check operating conditions | |
| Check meter / gauge system | ||
| Automatic high beam switch circuit | ||
| Headlight dimmer switch circuit | ||
| Combination meter assembly | ||
| Forward recognition camera | ||
| Main body ECU (Multiplex network body ECU) | ||
| Automatic high beam system does not operate | Check operating conditions | |
| Check Data List (Auto H Beam STS0) | ||
| Check that the low beams and high beams operate manually | - | |
| Check automatic light control system operation | ||
| Automatic high beam switch circuit | ||
| Headlight dimmer switch circuit | ||
| Forward recognition camera | ||
| Main body ECU (Multiplex network body ECU) |