Note
If the main body ECU (multiplex network body ECU) is replaced, refer to the Service Bulletin.
When replacing the combination meter assembly, make sure to replace it with a new one.
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 related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | Link |
|---|---|---|
| Both left and right low beam headlights do not illuminate. | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU)(for LHD) | ||
| Main body ECU (Multiplex network body ECU)(for RHD) | ||
| Low beam headlight on right side does not illuminate. | Headlight unit assembly RH | |
| Headlight unit RH | ||
| Headlight light control ECU sub-assembly RH | ||
| Low beam headlight on left side does not illuminate. | Headlight unit assembly LH | |
| Headlight unit LH | ||
| Headlight light control ECU sub-assembly LH | ||
| Both left and right high beam headlights do not illuminate. | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU)(for LHD) | ||
| Main body ECU (Multiplex network body ECU)(for RHD) | ||
| High beam headlight on right side does not illuminate. | Headlight unit assembly RH | |
| Headlight unit RH | ||
| Headlight light control ECU sub-assembly RH | ||
| High beam headlight on left side does not illuminate. | Headlight unit assembly LH | |
| Headlight unit LH | ||
| Headlight light control ECU sub-assembly LH | ||
| High beam flash function does not operate (high beam headlights are normal). | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU)(for LHD) | ||
| Main body ECU (Multiplex network body ECU)(for RHD) | ||
| Low beam and high beam headlight on right side does not illuminate. | Power source circuit | |
| Headlight light control ECU sub-assembly RH | ||
| Low beam and high beam headlight on left side does not illuminate. | Power source circuit | |
| Headlight light control ECU sub-assembly LH |
| Symptom | Suspected Area | Link |
|---|---|---|
| Both left and right clearance lights do not illuminate. | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU)(for LHD) | ||
| Main body ECU (Multiplex network body ECU)(for RHD) | ||
| Clearance light on right side does not illuminate. | Daytime running light relay circuit | |
| Headlight light control ECU sub-assembly RH | ||
| Clearance light on left side does not illuminate. | Daytime running light relay circuit | |
| Headlight light control ECU sub-assembly LH |
| Symptom | Suspected Area | Link |
|---|---|---|
| Both left and right daytime running lights do not illuminate. | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU)(for LHD) | ||
| Main body ECU (Multiplex network body ECU)(for RHD) | ||
| Daytime running light on right side does not illuminate. | Daytime running light relay circuit | |
| Headlight light control ECU sub-assembly RH | ||
| Daytime running light on left side does not illuminate. | Daytime running light relay circuit | |
| Headlight light control ECU sub-assembly LH | ||
| Clearance light and daytime running light on right side does not illuminate. | Power source circuit | |
| Daytime running light relay circuit | ||
| Headlight light control ECU sub-assembly RH | ||
| Clearance light and daytime running light on left side does not illuminate. | Power source circuit | |
| Daytime running light relay circuit | ||
| Headlight light control ECU sub-assembly LH |
| Symptom | Suspected Area | Link |
|---|---|---|
| Rear fog light does not illuminate (taillight is normal). | Headlight dimmer switch circuit | |
| Rear fog light circuit | ||
| Main body ECU (Multiplex network body ECU)(for LHD) | ||
| Main body ECU (Multiplex network body ECU)(for RHD) |
| Symptom | Suspected Area | Link |
|---|---|---|
| License plate light does not illuminate. | Harness or connector | - |
| License plate light assembly LH | ||
| License plate light assembly RH |
| Symptom | Suspected Area | Link |
|---|---|---|
| Taillight does not illuminate. | Rear Combination Light Assembly | |
| Rear combination light socket and wire sub-assembly | ||
| Harness or connector | - | |
| Instrument panel junction block assembly | ||
| All of the taillights do not illuminate | Headlight dimmer switch circuit | |
| Taillight relay circuit | ||
| Main body ECU (Multiplex network body ECU)(for LHD) | ||
| Main body ECU (Multiplex network body ECU)(for RHD) |
| Symptom | Suspected Area | Link |
|---|---|---|
| Stop light on one side does not illuminate. | Harness or connector | - |
| Rear Combination Light Assembly | ||
| Rear combination light socket and wire sub-assembly | ||
| Rear Light Assembly | ||
| Center stop light does not illuminate. | Harness or connector | - |
| Center stop light assembly | ||
| All of the stop lights do not operate. | STOP fuse | - |
| Harness or connector | - | |
| Stop light switch assembly |
| Symptom | Suspected Area | Link |
|---|---|---|
| All of the back-up lights do not operate. | BKUP LP fuse | - |
| Harness or connector | - | |
| Instrument panel junction block assembly [BKUP LP relay] | ||
| Back-up Light Circuit | ||
| Shift Lever Position Sensor | ||
| Back-up light on one side does not illuminate. | Rear Light Assembly | |
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| No turn signal lights operate (hazard warning lights are normal). | Turn signal switch circuit | |
| Combination meter assembly | ||
| One of the turn signal lights does not operate. | Meter/gauge system |
| Symptom | Suspected Area | Link |
|---|---|---|
| Hazard warning lights do not operate (turn signal lights are normal). | Harness or connector | - |
| Hazard warning switch circuit | ||
| Combination meter assembly | ||
| Emergency brake signal (hazard warning light blink) does not operate | CAN communication system(for LHD) | |
| CAN communication system(for RHD) | ||
| Electronically controlled brake system | ||
| Combination meter assembly |
| Symptom | Suspected Area | Link |
|---|---|---|
| Automatic light control system does not operate. | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU)(for LHD) | ||
| Main body ECU (Multiplex network body ECU)(for RHD) |
| Symptom | Suspected Area | Link |
|---|---|---|
| Light auto turn-off system does not operate. | Headlight dimmer switch circuit | |
| Front door courtesy switch circuit | ||
| Rear door courtesy switch circuit | ||
| IG signal circuit | ||
| Main body ECU (Multiplex network body ECU)(for LHD) | ||
| Main body ECU (Multiplex network body ECU)(for RHD) |