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 | See page |
|---|---|---|
| Only No. 1 room light assembly does not illuminate. | No. 1 room light assembly | |
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Only power switch illumination does not illuminate. | CAN communication system | |
| Power switch illumination circuit | ||
| Certification ECU (Smart key ECU assembly) | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Illuminated entry system does not operate normally. | DOME fuse | - |
| Door courtesy switch circuit | ||
| Door unlock detection switch circuit | ||
| IG signal circuit | ||
| ACC signal circuit | ||
| Interior light circuit | ||
| CAN communication system | ||
| Power switch illumination circuit | ||
| Certification ECU (Smart key ECU assembly) | - | |
| Main body ECU (Multiplex network body ECU) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Vanity light does not illuminate. | Bulb | - |
| Visor assembly | - | |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Glove box light does not illuminate. | Glove box light assembly | |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Battery saving function does not operate. | Door courtesy switch circuit | |
| IG signal circuit | ||
| Main body ECU (Multiplex network body ECU) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Luggage compartment light does not illuminate. | Bulb | - |
| No. 2 room light assembly | ||
| Back door courtesy switch | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Front personal light does not illuminate. | Bulb | - |
| Map light assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| No. 1 room light assembly does not illuminate. | Bulb | - |
| No. 1 room light assembly (room light switch base) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Shift illumination light does not illuminate. | Harness or connector | - |
| Inner rear view mirror assembly | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| All of instrument panel illumination lights do not come on. (Taillights operate normally.) | PANEL fuse | - |
| Harness or connector | - |