LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE
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 |
|---|---|---|
| Low beam headlight on one side does not illuminate | H-LP LH LO fuse or H-LP RH LO fuse | - |
| Headlight bulb (Low) [for Halogen Headlight] | - | |
| Harness or connector | - | |
| Headlight unit | - | |
| Both left and right low beam headlights do not illuminate | H-LP MAIN fuse | - |
| Headlight dimmer switch circuit | ||
| Headlight relay circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| High beam headlight on one side does not illuminate | H-LP LH HI fuse or H-LP RH HI fuse | - |
| Headlight bulb (High) | - | |
| Headlight unit | - | |
| Harness or connector | - | |
| Both left and right high beam headlights do not illuminate (low beam headlights are normal) | H-LP HI fuse | - |
| Headlight dimmer switch circuit | ||
| Headlight (High beam) circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| High beam headlights do not illuminate with "High Flash" function (passing function) | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU) | - | |
| Low beam headlights or high beam headlights do not turn off | Headlight dimmer switch assembly | |
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Clearance light does not illuminate | Clearance light bulb [for Halogen Headlight] | - |
| Headlight unit | - | |
| Harness or connector | - | |
| Taillight does not illuminate | Rear combination light assembly | |
| Harness or connector | - | |
| License plate light does not illuminate | License plate light bulb | - |
| License plate light assembly | - | |
| Harness or connector | - | |
| All lights do not illuminate | TAIL fuse | - |
| Headlight dimmer switch circuit | ||
| Taillight relay circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Stop light on one side does not illuminate | Rear combination light assembly | |
| Harness or connector | - | |
| Center stop light does not illuminate | Center stop light assembly | |
| Harness or connector | - | |
| All lights do not illuminate | STOP fuse | - |
| Stop light circuit | ||
| Harness or connector | - | |
| Stop light control relay | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Front fog light on one side does not illuminate | Front fog light bulb | - |
| Harness or connector | - | |
| Both left and right front fog lights do not illuminate (taillight is normal) | FR FOG fuse | - |
| Headlight dimmer switch circuit | ||
| Front fog light circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Rear fog light on one side does not illuminate | Rear fog light bulb | - |
| Harness or connector | - | |
| Both left and right rear fog lights do not illuminate (taillight is normal) | RR FOG fuse | - |
| Headlight dimmer switch circuit | ||
| Rear fog light circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Hazard warning lights do not operate (turn signal lights are normal) | TRN-HAZ fuse | - |
| Hazard warning switch circuit | ||
| Harness or connector | - | |
| Turn signal flasher assembly | ||
| Turn signal lights do not operate (hazard warning lights are normal) | ECU-IG NO. 2 fuse | - |
| Headlight dimmer switch assembly (Turn signal light switch) | ||
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| Hazard warning lights and turn signal lights do not operate | TRN-HAZ fuse and ECU-IG NO. 2 fuse | - |
| Turn signal flasher assembly | ||
| 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 | - | |
| Front turn signal light does not illuminate | Front turn signal light bulb | - |
| Headlight unit | - | |
| Harness or connector | - | |
| Side turn signal light does not illuminate | Side turn signal light assembly | |
| Outer rear view mirror assembly | ||
| Harness or connector | - | |
| Rear turn signal light does not illuminate | Rear turn signal light bulb | - |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Back-up light on one side does not illuminate | Back-up light bulb | - |
| Harness or connector | - | |
| Both left and right back-up lights do not illuminate | ECU-IG NO. 2 fuse | - |
| BK/LP relay | - | |
| Park/neutral position switch (for A343F Automatic Transmission) | ||
| Park/neutral position switch (for A750F Automatic Transmission) | ||
| Back-up light switch assembly (for G52F Manual Transmission) | ||
| Back-up light switch assembly (for RA61F Manual Transmission) | ||
| Back-up light switch assembly (for R150F Manual Transmission) | ||
| Harness or connector | - |
| 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 | Headlight dimmer switch circuit | |
| Door courtesy switch circuit | ||
| Back door courtesy switch circuit | ||
| IG signal circuit | ||
| Main body ECU (Multiplex network body ECU) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Manual headlight leveling control system does not operate | Headlight leveling switch | |
| Headlight leveling motor | - | |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Daytime running light system does not operate (headlight and taillight are normal) | Daytime running light relay circuit | |
| Headlight dimmer switch circuit | ||
| IG signal circuit | ||
| DRL fuse | - | |
| DRL relay | - | |
| Driver side junction block assembly | - | |
| Main body ECU (Multiplex network body ECU) | - | |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Headlight Leveling does not operate | Check for DTCs | |
| Headlight swivel ECU assembly power source | ||
| Headlight swivel ECU assembly | - | |
| Headlight beam level control system warning light does not come on when turning the ignition switch to ON | Combination meter assembly | - |
| Headlight swivel ECU assembly | - |