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 |
|---|---|---|
| Screen of the headup display does not display | Harness or connector (IG, B, ES) | - |
| Refer to "Main Switch Circuit" | ||
| Brightness of the headup display screen does not change | Perform Active Test [Display Brightness] | |
| Read the Data List [Brightness Up Switch, Brightness Down Switch] | ||
| Refer to "Main Switch Circuit" | ||
| Replace combination meter mirror ECU | ||
| Headup display screen indication position malfunction | Perform Active Test [Display Position] | |
| Read the Data List [Projection Position Up Switch, Projection Position Down Switch] | ||
| Refer to "Main Switch Circuit" | ||
| Replace combination meter mirror ECU | ||
| Headup display screen does not change | Read to Data List [Display Change Switch] | |
| Refer to "Main Switch Circuit" | ||
| Replace combination meter mirror ECU | ||
| Headup display screen malfunction (Other system operates normally) | Replace combination meter mirror ECU |