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 front interior light does not illuminate. | Bulb | - |
| Map light assembly | ||
| Harness or connector | - | |
| Only rear interior light does not illuminate. | Bulb | - |
| No. 1 room light assembly | ||
| Harness or connector | - | |
| Only power switch illumination does not illuminate. | CAN communication system | |
| Power switch illumination circuit | ||
| Certification ECU (Smart key ECU assembly) | - | |
| Interior light control does not operate normally. | DOME fuse | - |
| Door courtesy switch circuit | ||
| Door unlock detection switch circuit | ||
| IG signal circuit | ||
| ACC signal circuit | ||
| Interior light circuit | ||
| Power switch illumination circuit | ||
| Certification ECU (Smart key ECU assembly) | - | |
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Only one footwell light does not illuminate. | Footwell light | |
| Harness or connector | - | |
| Instrument panel junction block assembly | - | |
| Both footwell light LH and RH do not illuminate (interior light control is normal). | Footwell light circuit | |
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Vanity light does not illuminate. | Bulb | - |
| 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 room light does not illuminate. | Bulb | - |
| Luggage compartment room light (No.2 room light assembly) | ||
| Door courtesy switch circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Front personal light does not illuminate. | Bulb | - |
| Map light assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Center console spot light does not illuminate. | Map light assembly (Center console spot light) | |
| IG signal circuit | ||
| ACC signal circuit | ||
| Overhead console illumination light circuit | ||
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| All of instrument panel illumination lights do not come on. (Taillights operate normally.) | PANEL fuse | - |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| All of lights that controlled by DOME ON/OFF switch do not come on when DOME ON/OFF switch is operated. | Interior light circuit | |
| Main body ECU (Multiplex network body ECU) |