LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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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.
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Inspect the fuses and relays related to the system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| LO-beam headlight on one side does not illuminate | HEAD LL fuse or HEAD RL fuse | - |
| Headlight bulb (Low) | - | |
| Harness or connector | - | |
| Headlight light control ECU sub-assembly | ||
| Headlight unit assembly | ||
| Both left and right LO-beam headlight does not illuminate | LO-beam headlight does not illuminate | |
| HI-beam headlight on one side does not illuminate | HEAD LH fuse or HEAD RH fuse | - |
| Headlight bulb (High) | - | |
| Harness or connector | - | |
| Headlight unit assembly | ||
| Running light relay | - | |
| Both left and right HI-beam headlight does not illuminate | HI-beam headlight does not illuminate | |
| Flash headlight does not illuminate | Data List | - |
| Headlight dimmer switch (for LHD) | ||
| Headlight dimmer switch (for RHD) | ||
| Harness or connector | - | |
| Main body ECU (cowl side junction block LH) | - | |
| Headlight is dark | Headlight bulb | - |
| Taillight does not illuminate or has abnormal operation | Clearance light does not illuminate |
| 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 light does not illuminate | |
| Emergency stop light does not operate. | Vehicle stability control system | |
| Harness or connector | - | |
| Stop light control relay assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Front fog light does not illuminate | Fog light bulb | - |
| Front fog light does not illuminate |
| Symptom | Suspected Area | See page |
|---|---|---|
| Rear fog light does not illuminate | Rear fog light bulb | - |
| Rear fog light does not illuminate |
| Symptom | Suspected Area | See page |
|---|---|---|
| Turn signal light does not illuminate | Check for DTCs | |
| Front turn signal light does not illuminate | Front turn signal light bulb | - |
| Harness or connector | - | |
| Headlight unit assembly | ||
| Side turn signal light does not illuminate | Side turn signal light assembly | |
| Harness or connector | - | |
| Outer rear view mirror assembly | ||
| Rear turn signal light does not illuminate | Rear turn signal light bulb | - |
| Harness or connector | - | |
| Rear combination light assembly | ||
| Hazard warning lights do not operate | Harness or connector | - |
| Multi-display assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Room light does not illuminate or has abnormal operation | Room No. 1 light bulb | - |
| Room No. 3 light bulb | - | |
| Room light control does not operate | ||
| Map light does not illuminate | Map light bulb | - |
| Map light assembly | ||
| Personal light does not illuminate or has abnormal operation | Room No. 1 light bulb | - |
| Personal light does not illuminate | ||
| Console spot light does not illuminate | Map light assembly | |
| Vanity light does not illuminate | Vanity light bulb | - |
| Visor assembly | - | |
| Harness or connector | - | |
| Inside handle illumination light does not illuminate | Inside handle light does not illuminate | |
| Door courtesy light does not illuminate | Front door courtesy light switch assembly | |
| Rear door courtesy light switch assembly | ||
| Front door courtesy light assembly | ||
| Rear door courtesy light assembly | ||
| Back door lock assembly (w/o Power Back Door System) | ||
| Back door lock assembly (w/ Power Back Door System) | ||
| Luggage No. 1 compartment light assembly | ||
| Harness or connector | - | |
| Interior foot light does not illuminate | Interior foot light does not illuminate | |
| Engine switch (illumination) does not illuminate | Engine switch | |
| Harness or connector | - | |
| Main body ECU (cowl side junction block LH) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Automatic light control function does not operate | Automatic light control function does not operate |
| Symptom | Suspected Area | See page |
|---|---|---|
| Light auto turn off system does not operate normally | Main body ECU (cowl side junction block LH) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Battery saving function (basic function) does not operate | Front door courtesy light switch assembly | |
| Rear door courtesy light switch assembly | ||
| Back door lock assembly (w/o Power Back Door System) | ||
| Back door lock assembly (w/ Power Back Door System) | ||
| Harness or connector | - | |
| Main body ECU (cowl side junction block LH) | - | |
| Battery saving function (interior light auto cut function) does not operate | DOME CUT relay | |
| Harness or connector | - | |
| Main body ECU (cowl side junction block LH) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| AFS OFF switch does not operate | Combination switch assembly | |
| AFS ECU (for LHD) | ||
| AFS ECU (for RHD) | ||
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Daytime running light system does not operate | Headlight dimmer switch assembly | |
| Parking brake switch | ||
| Headlight unit assembly | ||
| Main body ECU (cowl side junction block LH) | ||
| Harness or connector | - | |
| CAN communication system (for LHD) | ||
| CAN communication system (for RHD) |
| Symptom | Suspected Area | See page |
|---|---|---|
| Inner rear view mirror indicator light remains on when the inner rear view mirror AUTO switch is pressed. | Inner rear view mirror assembly | |
| Inner rear view mirror indicator light flashes. | Perform operation check | |
| Inner rear view mirror assembly | ||
| Automatic high beam indicator light does not come on when the automatic high beam system is in standby mode (automatic light control system operates normally). | Perform operation check | |
| Headlight dimmer switch assembly | ||
| Harness or connector | - | |
| Combination meter assembly | ||
| Main body ECU (cowl side junction block LH) | - | |
| Automatic high beam system does not operate (automatic high beam indicator light flashes). | Check for DTCs | |
| Combination meter assembly | - | |
| Automatic high beam system does not operate (automatic high beam indicator light is on or off). | Active test | |
| Inner rear view mirror assembly (Camera detection malfunction*1) | ||
| Inner rear view mirror assembly (Aiming misalignment*2) | ||
| Main body ECU (cowl side junction block LH) | - |
Note
*1: Camera detection malfunctions can be detected using the intelligent tester. Under the following conditions, if the camera built into the inner rear view mirror assembly cannot detect other vehicles or lights correctly, it will stop automatic high beam control and turn off the automatic high beam indicator light:
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When the front windshield is not clear (ice, snow or frost is on the glass).
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When the front windshield is dirty (sand, mud, water stains or bugs are on the glass).
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When there is a seal or sticker, etc., on the front windshield near the automatic high beam sensor.
*2: Aiming misalignment of the camera can be detected using the intelligent tester. Under the following conditions, the camera built into the rear view mirror assembly cannot adjust its center point:
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When the inner rear view mirror assembly is at an angle due to incorrect installation or damage to the camera.
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When the automatic aiming adjusting function of the mirror does not work correctly.
If the camera aiming is misaligned, check the following conditions:
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Check if the vehicle is inclined.
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Check if the windshield glass is installed correctly.
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Check if the inner rear view mirror assembly is installed correctly.
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Check if there is deformation of the camera or stay of the inner rear view mirror assembly.
| Symptom | Suspected Area | See page |
|---|---|---|
| Back-up light does not illuminate | Back-up light bulb | - |
| Back-up light does not illuminate | ||
| License plate light does not illuminate | Clearance light does not illuminate | |
| Scuff plate light does not illuminate | Front door courtesy light switch assembly | |
| Scuff plate illumination (front door scuff plate) | ||
| Harness or connector | - | |
| Door mirror foot light does not illuminate | Door mirror foot light does not illuminate | |
| Step light does not illuminate | Step light bulb | - |
| Front door courtesy light switch assembly | ||
| Rear door courtesy light switch assembly | ||
| Step light assembly | ||
| No. 2 main body ECU | ||
| Harness or connector | - | |
| Glove box illumination light does not illuminate | Glove box illumination light | |
| Harness or connector | - |