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 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 (Left Headlight) | Headlight beam level control actuator circuit | |
| Headlight ECU sub-assembly LH | ||
| Automatic headlight beam level control system does not operate (Right Headlight) | Headlight beam level control actuator circuit | |
| Headlight ECU sub-assembly RH | ||
| Initialization cannot be performed | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Headlight ECU sub-assembly LH |