Note
Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Service Bulletin.*1
*1: w/ Entry and Start System
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 | Link |
|---|---|---|
| Personal light LH does not illuminate | Bulb | - |
| Map light assembly | ||
| Harness or connector | - | |
| Personal light RH does not illuminate | Bulb | - |
| Map light assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Room light does not illuminate | Bulb | - |
| Harness or connector (Including all light components that are part of the wire harness) | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Vanity light LH does not illuminate | Bulb | |
| Visor assembly LH | - | |
| Harness or connector | - | |
| Vanity light RH does not illuminate | Bulb | |
| Visor assembly RH | - | |
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Door ambient illumination light LH does not illuminate | No. 1 interior illumination light assembly LH | |
| Harness or connector | - | |
| Door ambient illumination light RH does not illuminate | No. 1 interior illumination light assembly RH | |
| Harness or connector | - | |
| No. 1 cup holder illumination light | Instrument cluster finish panel garnish | |
| Harness or connector | - | |
| No. 2 cup holder illumination light | Instrument cluster finish panel center garnish | |
| Harness or connector | - | |
| All ambient lights do not illuminate | Ambient illumination light circuit | |
| Main body ECU (Multiplex network body ECU)*2 | ||
| Main body ECU (Multiplex network body ECU)*3 |
*1: w/ Door ambient illumination light
*2: for LHD
*3: for RHD
| Symptom | Suspected Area | Link |
|---|---|---|
| Glove box light does not illuminate | Glove box light assembly | |
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Luggage compartment room light does not illuminate | Bulb | - |
| No. 1 luggage compartment light assembly | ||
| Back door courtesy switch circuit | ||
| Harness or connector | - | |
| Instrument panel junction block assembly*1 | ||
| Instrument panel junction block assembly*2 | ||
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 |
*1: for LHD
*2: for RHD
| Symptom | Suspected Area | Link |
|---|---|---|
| All the interior lights that receive power via the DOME CUT relay do not illuminate (The DOME fuse is normal) | Interior light auto cut circuit | |
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 |
*1: for LHD
*2: for RHD
| Symptom | Suspected Area | Link |
|---|---|---|
| All interior light control functions do not operate under any condition | Interior light circuit | |
| Main body ECU (Multiplex network body ECU)*3 | ||
| Main body ECU (Multiplex network body ECU)*4 | ||
| Door open/close-linked control function does not operate when doors are opened/closed | Door courtesy switch circuit | |
| Map light assembly | ||
| Main body ECU (Multiplex network body ECU)*3 | ||
| Main body ECU (Multiplex network body ECU)*4 | ||
| 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)*3 | ||
| Main body ECU (Multiplex network body ECU)*4 | ||
| Actuation area-linked control function does not operate when registered key is brought into any exterior detection area*1 | CAN communication system | |
| Entry and start system (for Entry Function) | ||
| Main body ECU (Multiplex network body ECU)*3 | ||
| Main body ECU (Multiplex network body ECU)*4 | ||
| Engine switch-linked control function does not operate when engine switch is operated*1 | IG signal circuit | |
| ACC signal circuit | ||
| Main body ECU (Multiplex network body ECU)*3 | ||
| Main body ECU (Multiplex network body ECU)*4 | ||
| Ignition switch-linked control function does not operate when ignition switch is operated*2 | IG signal circuit | |
| ACC signal circuit | ||
| Main body ECU (Multiplex network body ECU)*3 | ||
| Main body ECU (Multiplex network body ECU)*4 | ||
| Engine switch illumination does not illuminate*1 | CAN communication system | |
| Engine switch illumination circuit | ||
| Certification ECU (Smart key ECU assembly) | - |
*1: w/ Entry and Start System
*2: w/o Entry and Start System
*3: for LHD
*4: for RHD
| Symptom | Suspected Area | Link |
|---|---|---|
| All interior light control functions do not operate under any condition | Ambient illumination light circuit | |
| Main body ECU (Multiplex network body ECU)*4 | ||
| Main body ECU (Multiplex network body ECU)*5 | ||
| Engine switch-linked control function does not operate when engine switch is operated*2 | IG signal circuit | |
| ACC signal circuit | ||
| Main body ECU (Multiplex network body ECU)*4 | ||
| Main body ECU (Multiplex network body ECU)*5 | ||
| Ignition switch-linked control function does not operate when ignition switch is operated*3 | IG signal circuit | |
| ACC signal circuit | ||
| Main body ECU (Multiplex network body ECU)*4 | ||
| Main body ECU (Multiplex network body ECU)*5 |
*1: w/ Door ambient illumination light
*2: w/ Entry and Start System
*3: w/o Entry and Start System
*4: for LHD
*5: for RHD
| Symptom | Suspected Area | Link |
|---|---|---|
| Battery saving function does not operate | IG signal circuit | |
| ACC signal circuit | ||
| Door courtesy switch circuit | ||
| Back door courtesy switch circuit | ||
| Interior light circuit | ||
| Door unlock detection switch circuit | ||
| Interior light auto cut circuit | ||
| Main body ECU (Multiplex network body ECU)*1 | ||
| Main body ECU (Multiplex network body ECU)*2 |
*1: for LHD
*2: for RHD