Note
If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.
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 | Link |
|---|---|---|
| Automatic headlight beam level control system does not operate (Left Headlight) | Power source circuit | |
| Headlight beam level control actuator circuit | ||
| Headlight ECU sub-assembly LH | ||
| Automatic headlight beam level control system does not operate (Right Headlight) | Power source circuit | |
| Headlight beam level control actuator circuit | ||
| Headlight ECU sub-assembly RH | ||
| Initialization cannot be performed | Check DTCs | |
| CAN communication system | ||
| Headlight ECU sub-assembly LH | ||
| Headlight leveling warning light does not come on when turning the power switch on (IG) | Headlight ECU sub-assembly LH | |
| Combination meter assembly |