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.
Note
If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.
| Symptom | Suspected Area | See page |
|---|---|---|
| Automatic high beam indicator on the combination meter assembly does not illuminate. | Check operating conditions | |
| Combination meter assembly | ||
| Lane departure warning camera | ||
| Driving support ECU assembly*1 | ||
| Main body ECU (multiplex network body ECU) | ||
| Automatic high beam system does not operate. | Check Data List (Auto H Beam STS) | |
| Automatic high beam switch circuit | ||
| Low beam headlight circuit | ||
| High beam headlight circuit | ||
| Headlight dimmer switch circuit | ||
| Check automatic light control system operation | ||
| Lane departure warning camera power source circuit*1 | ||
| Lane departure warning camera power source circuit*2 | ||
| Lane departure warning camera | ||
| Driving support ECU assembly*1 | ||
| Main body ECU (multiplex network body ECU) |
*1: w/ Dynamic Radar Cruise Control System
*2: w/o Dynamic Radar Cruise Control System
Tech Tips
Camera detection malfunctions can be detected using the GTS.
Aiming misalignment of the camera can be detected using the GTS. If the camera aiming is misaligned, check the following conditions:
Check if the vehicle is inclined.
Check if the windshield glass is installed correctly.
Check if the lane departure warning camera is installed correctly.
Check if there is deformation of the lane departure warning camera.