Note
Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Service Bulletin.
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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Map light LH or map light RH does not illuminate (Other interior lights are normal) | Bulb | |
| Map light assembly | ||
| Map light LH and map light RH does not illuminate (Other interior lights are normal) | Map light assembly | |
| Harness or connector | - | |
| Switch illumination or shift lever illumination does not illuminate (Other interior lights are normal) | Map light assembly | |
| Switch illumination and shift lever illumination do not illuminate (Other interior lights are normal) | Map light assembly | |
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Room light does not illuminate (Other interior lights are normal) | Bulb | |
| Harness or connector (Including bulb holder of the No. 1 room light assembly that are part of the wire harness) | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Vanity light LH does not illuminate | Bulb | |
| Visor assembly LH | ||
| Harness or connector (Including bulb holder of the vanity light assembly that are part of the wire harness) | - | |
| Vanity light RH does not illuminate | Bulb | |
| Visor assembly RH | ||
| Harness or connector (Including bulb holder of the vanity light assembly that are part of the wire harness) | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Courtesy light LH does not illuminate | Bulb | |
| Courtesy light assembly LH | ||
| Front door courtesy switch circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| Courtesy light RH does not illuminate | Bulb | |
| Courtesy light assembly RH | ||
| Front door courtesy switch circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | Link |
|---|---|---|
| Glove box light does not illuminate | Glove box light assembly | |
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Footwell light LH does not illuminate | No. 1 interior illumination light assembly LH (Footwell light LH) | |
| Harness or connector | - | |
| Footwell light RH does not illuminate | No. 1 interior illumination light assembly RH (Footwell light RH) | |
| Harness or connector | - | |
| Footwell light LH and footwell light RH do not illuminate | Footwell light circuit | |
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | Link |
|---|---|---|
| Luggage compartment light does not illuminate (Other interior lights are normal) | Bulb | |
| No. 1 luggage compartment light assembly | ||
| Back door courtesy switch circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | Link |
|---|---|---|
| All the interior lights that receive power via the DOME CUT relay do not illuminate | Interior light auto cut circuit | |
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | Link |
|---|---|---|
| All illuminated entry system control functions do not operate under any condition | Interior light auto cut circuit | |
| Interior light circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| Actuation area-linked control function does not operate when registered key is brought into any exterior detection area | CAN communication system | |
| Entry and start system (for Entry Function) | ||
| Main body ECU (Multiplex network body ECU) | ||
| Door lock/unlock-linked control function does not operate when doors are locked/unlocked | Door unlock detection switch circuit | |
| Main body ECU (Multiplex network body ECU) | ||
| Door open/close-linked control function does not operate when doors are opened/closed | Front door courtesy switch circuit | |
| Rear door courtesy switch circuit | ||
| Back door courtesy switch circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| Power switch-linked control function does not operate when power switch is operated | IG signal circuit | |
| ACC signal circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| Power switch illumination does not illuminate | CAN communication system | |
| Power switch illumination circuit | ||
| Certification ECU (Smart key ECU assembly) | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Battery saving function does not operate | IG signal circuit | |
| ACC signal circuit | ||
| Front door courtesy switch circuit | ||
| Rear door courtesy switch circuit | ||
| Back door courtesy switch circuit | ||
| Door unlock detection switch circuit | ||
| Interior light auto cut circuit | ||
| Main body ECU (Multiplex network body ECU) |