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 |
|---|---|---|
| Illuminated entry system does not operate. | DOME fuse | |
| Main body ECU (Multiplex network body ECU) | ||
| Harness or connector | - | |
| Illuminated entry system does not operate with door opening or closing operation. | Door courtesy switch circuit | |
| Main body ECU (Multiplex network body ECU) | ||
| Harness or connector | - | |
| Illuminated entry system does not operate with door lock or unlock operation. | Door unlock detection switch circuit | |
| Main body ECU (Multiplex network body ECU) | ||
| Harness or connector | - | |
| Illuminated entry system does not operate with engine switch*1 or ignition switch*2 operation. | IG signal circuit | |
| ACC signal circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| Harness or connector | - | |
| Engine switch illumination does not illuminate.*1 | CAN communication line | |
| Engine switch illumination circuit | ||
| Certification ECU (Smart key ECU assembly) | - | |
| No. 1 room light assembly and map light assembly*3 do not operate. | Interior light circuit | |
| Main body ECU (Multiplex network body ECU) | ||
| Harness or connector | - | |
| No. 1 interior illumination light assemblies do not operate. | Park/neutral position switch assembly*4 | |
| Parking brake switch circuit*5 | ||
| Footwell light circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| Harness or connector | - |
*1: w/ Entry and Start System
*2: w/o Entry and Start System
*3: w/ Glass Roof
*4: for CVT
*5: except CVT
| Symptom | Suspected Area | See page |
|---|---|---|
| Map light assembly 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 | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| No. 2 room light assembly does not illuminate. | Bulb | |
| Luggage room light circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| No. 1 interior illumination light assembly on one side does not illuminate. | No. 1 interior illumination light assembly (for LH side) | |
| No. 1 interior illumination light assembly (for RH side) | ||
| 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 |
|---|---|---|
| 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 instrument panel illumination lights do not come on. (Taillights operate normally.) | PANEL fuse | |
| Instrument panel illumination circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| Harness or connector (Instrument panel junction block assembly - Instrument panel illuminations) | - | |
| All of instrument panel illumination lights come on when taillights are turned on by the daytime running light control. (Taillights operate normally.) | Instrument panel illumination circuit | |
| Main body ECU (Multiplex network body ECU) | - |