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 | Check DTCs | |
| Check fail-safe function | ||
| Headlight leveling ECU power source circuit | ||
| Headlight beam level control actuator circuit | ||
| Headlight leveling ECU assembly | ||
| Initialization cannot be performed | Check DTCs | |
| CAN communication system | ||
| Headlight leveling ECU assembly | ||
| Headlight leveling warning light does not come on when turning the power switch on (IG) | Headlight leveling ECU assembly | |
| Combination meter assembly |
Note
Initialize the headlight leveling ECU assembly after the vehicle height changes due to replacement of suspension components or after performing operations such as removal and reinstallation or replacement of the rear height control sensor sub-assembly.
When the headlight leveling ECU assembly is replaced, initialization is also necessary.