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 |
|---|---|---|
| One low beam headlight does not illuminate. | Bulb | - |
| No. 1 integration relay | ||
| Harness or connector | - | |
| Both left and right low beam headlights do not illuminate. | Headlight dimmer switch circuit | |
| Low beam headlight circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| One high beam headlight does not illuminate. | H-LP LH HI fuse or H-LP RH HI fuse | - |
| Bulb | - | |
| No. 1 integration relay | ||
| Harness or connector | - | |
| Both left and right high beam headlights do not illuminate. | H-LP HI MAIN FUSE | - |
| Headlight dimmer switch circuit | ||
| High beam headlight circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| "High Flash" (passing function) headlight does not illuminate (high beam headlights are normal). | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU) | ||
| One front parking light does not illuminate. | Bulb | - |
| Harness or connector | - | |
| One rear taillight does not illuminate. | Rear combination light assembly | |
| Harness or connector | - | |
| One license plate light does not illuminate. | Bulb | - |
| Harness or connector | - | |
| All of the lights (rear taillights, parking lights and license plate lights) do not illuminate. | TAIL fuse | - |
| Headlight dimmer switch circuit | ||
| Taillight relay circuit | ||
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| One low beam headlight does not illuminate. | Check DTCs | - |
| Light control ECU | ||
| No. 1 integration relay | ||
| Headlight unit | ||
| Harness or connector | - | |
| Both left and right low beam headlights do not illuminate. | Check DTCs | |
| Headlight dimmer switch circuit | ||
| Low beam headlight circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| "High Flash" (passing function) headlight does not illuminate (high beam headlights are normal). | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU) | ||
| One front parking light does not illuminate. | Bulb | - |
| Harness or connector | - | |
| One rear taillight does not illuminate. | Rear combination light assembly | |
| Harness or connector | - | |
| One license plate light does not illuminate. | Bulb | - |
| Harness or connector | - | |
| All of the lights (rear taillights, parking lights and license plate lights) do not illuminate. | TAIL fuse | - |
| Headlight dimmer switch circuit | ||
| Taillight relay circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| LED headlight warning light does not illuminate (LED headlights are normal). | Harness or connector | - |
| Light control ECU | ||
| Headlight unit | ||
| Main body ECU (Multiplex network body ECU) | ||
| Meter circuit plate |
| Symptom | Suspected Area | See page |
|---|---|---|
| One side stop light does not illuminate. | Rear combination light assembly | |
| Harness or connector | - | |
| High mounted stop light does not illuminate. | Center stop light assembly | |
| Center stop light wire harness | ||
| Harness or connector | - | |
| All of the stop lights do not illuminate. | STOP fuse | - |
| Stop light switch assembly | ||
| Stop light control ECU assembly | ||
| Harness or connector | - | |
| Stop lights remain on. | Electronically controlled brake system | |
| Stop light switch assembly | ||
| Stop light control ECU assembly | ||
| Harness or connector | - | |
| Brake booster with master cylinder assembly (for LHD) | ||
| Brake booster with master cylinder assembly (for RHD) |
| Symptom | Suspected Area | See page |
|---|---|---|
| One front fog light does not illuminate. | Bulb | - |
| Harness or connector | - | |
| Both left and right front fog lights do not illuminate (taillights are normal). | FR FOG fuse | - |
| Headlight dimmer switch circuit | ||
| Front fog light circuit | ||
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Rear fog light does not illuminate. | Bulb | - |
| RR FOG fuse | - | |
| Headlight dimmer switch circuit | ||
| Rear fog light circuit | ||
| Main body ECU (Multiplex network body ECU) |
*1: w/ Rear Fog Light
| Symptom | Suspected Area | See page |
|---|---|---|
| One back-up light does not illuminate. | Bulb | - |
| Harness or connector | - | |
| Both left and right back-up lights do not illuminate. | Back-up light circuit | |
| Harness or connector | - | |
| Power management control ECU |
| Symptom | Suspected Area | See page |
|---|---|---|
| Side turn signal light does not operate. | Side turn signal light assembly | |
| Harness or connector | - | |
| One turn signal light does not operate (except side turn signal lights). | Bulb | - |
| Harness or connector | - | |
| Turn signal lights do not operate in one direction. | Headlight dimmer switch assembly (Turn signal light switch) | |
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| All turn signal lights do not operate. | ECU-IG NO. 2 fuse | - |
| HAZ fuse | - | |
| Headlight dimmer switch assembly (Turn signal light switch) | ||
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| All turn signal lights do not flash at the correct speed. | Bulb | - |
| Turn signal flasher assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Hazard warning lights do not operate. | HAZ fuse | - |
| ECU-IG NO. 2 fuse | - | |
| Hazard warning switch | ||
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| Hazard warning lights operate when the hazard warning switch is not turned on. | Electronically controlled brake system | |
| Hazard warning switch | ||
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| Brake booster with master cylinder assembly (for LHD) | ||
| Brake booster with master cylinder assembly (for RHD) | ||
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Automatic light control system does not operate. | Check DTCs | |
| Headlight dimmer switch circuit | ||
| IG signal circuit | ||
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Light auto turn-off system does not operate. (Light control switch is in TAIL or HEAD position) | Headlight dimmer switch circuit | |
| IG signal circuit | ||
| Main body ECU (Multiplex network body ECU) | ||
| Light auto turn-off system does not operate. (Light control switch is in AUTO position) | Headlight dimmer switch circuit | |
| Front door courtesy switch circuit | ||
| IG signal circuit | ||
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Light auto turn-off system does not operate. | Headlight dimmer switch circuit | |
| Front door courtesy switch circuit | ||
| IG signal circuit | ||
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Daytime running light control does not operate. | CAN communication system | |
| Headlight dimmer switch circuit | ||
| IG signal circuit | ||
| Parking brake switch circuit | ||
| Daytime running light relay circuit | ||
| Main body ECU (Multiplex network body ECU) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Charge lid light does not operate. | Spot light assembly | |
| Indicator light assembly (Courtesy switch inspection) | ||
| Harness or connector | - | |
| Plugin charge control ECU assembly |