Note
If the headlight leveling ECU (headlight swivel ECU assembly) has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight leveling ECU (headlight swivel ECU assembly) Click here.
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.
| Symptom | Suspected Area | See page |
|---|---|---|
| Automatic headlight beam level control system does not operate | Check DTCs | |
| Check fail-safe function | ||
| ECU power source circuit | ||
| Headlight leveling ECU (headlight swivel ECU assembly) | ||
| Initialization cannot be performed | Check DTCs | |
| CAN communication system (w/ Central Gateway ECU) | ||
| CAN communication system (w/o Central Gateway ECU) | ||
| Headlight leveling ECU (headlight swivel ECU assembly) |