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 symptom 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 |
|---|---|---|
| Headup display is not displayed. | Fuse (ECU-DCC NO. 2, ECU-IG1 NO. 4) | - |
| Wire harness or connector | - | |
| Headup display switch (No. 2 combination switch assembly) circuit | ||
| Combination meter mirror ECU | ||
| Combination display | ||
| Brightness of the headup display does not change. | Perform Active Test (Display Brightness) | |
| Read the Data List (Brightness Up Switch (Meter), Brightness Down Switch (Meter)) | ||
| Combination meter mirror ECU | ||
| Combination display | ||
| Combination meter assembly (Meter circuit plate) | ||
| Headup display is not displayed in the correct position. | Perform Active Test (Display Position) | |
| Read the Data List (Projection Position Up Switch (Meter), Projection Position Down Switch (Meter)) | ||
| Combination meter mirror ECU | ||
| Combination meter wire | ||
| No. 2 combination meter mirror | ||
| Combination meter assembly (Meter circuit plate) | ||
| Other headup display malfunction (Other systems are normal) | Combination meter mirror ECU |