Note
If the No. 1 headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Automatic headlight beam level control system does not operate (Left Headlight) (w/o Adaptive High Beam System) | Headlight beam level control actuator circuit | |
| No. 1 headlight ECU sub-assembly LH | ||
| Automatic headlight beam level control system does not operate (Left Headlight) (w/ Adaptive High Beam System) | Headlight unit LH | |
| Headlight unit assembly LH | ||
| No. 1 headlight ECU sub-assembly LH | ||
| Automatic headlight beam level control system does not operate (Right Headlight) (w/o Adaptive High Beam System) | Headlight beam level control actuator circuit | |
| No. 1 headlight ECU sub-assembly RH | ||
| Automatic headlight beam level control system does not operate (Right Headlight) (w/ Adaptive High Beam System) | Headlight unit LH | |
| Headlight unit assembly RH | ||
| No. 1 headlight ECU sub-assembly RH | ||
| Initialization cannot be performed | CAN communication system | |
| No. 1 headlight ECU sub-assembly LH |