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 |
|---|---|---|
| Headlight beam level control system warning light comes on | Warning light circuit | |
| Headlight leveling ECU assembly | ||
| Headlight beam level control does not operate (warning light is off) (low beam headlights are normal) | Check the fail-safe function | |
| Headlight beam level control actuator circuit | ||
| Headlight leveling ECU power source circuit | ||
| Vehicle speed signal circuit | ||
| Headlight leveling ECU assembly | ||
| Harness or connector | - | |
| Headlight beam level control system warning light does not come on when turning the ignition switch ON | Warning light circuit | |
| Headlight leveling ECU power source circuit | ||
| Headlight leveling ECU assembly | ||
| Combination meter assembly | - | |
| DTC information cannot be detected | Diagnosis circuit | |
| Initialization cannot be performed | LVL terminal circuit |