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 LL fuse or H-LP RL fuse | - |
| Discharge headlight bulb (Low) | ||
| Harness or connector | - | |
| Headlight light control ECU sub-assembly | ||
| High beam headlight on one side does not illuminate | H-LP LH fuse or H-LP RH fuse | - |
| Headlight bulb (High) | - | |
| Harness or connector | - | |
| Both left and right high beam headlights do not illuminate (low beam headlights are normal) | DIM RLY relay | - |
| Headlight dimmer switch assembly | ||
| Harness or connector | - | |
| High beam headlights do not illuminate with "High Flash" function (passing function) | Headlight dimmer switch assembly | |
| Harness or connector | - | |
| Low beam headlights do not turn off | H-LP RLY relay | - |
| Headlight dimmer switch assembly | ||
| Harness or connector | - | |
| High beam headlights do not turn off | DIM RLY relay | - |
| Headlight dimmer switch assembly | ||
| Harness or connector | - | |
| Discharge headlight bulb is dark | Discharge headlight bulb (Low) | |
| Harness or connector | - | |
| Headlight light control ECU sub-assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Low beam headlight on one side does not illuminate | H-LP LL fuse or H-LP RL fuse | - |
| Headlight bulb (Low) | - | |
| Harness or connector | - | |
| Both left and right low beam headlights do not illuminate (high beam headlights are normal) | Headlight dimmer switch assembly | |
| Harness or connector | - | |
| High beam headlight on one side does not illuminate | H-LP LH fuse or H-LP RH fuse | - |
| Headlight bulb (High) | - | |
| Harness or connector | - | |
| Both left and right high beam headlights do not illuminate (low beam headlights are normal) | Headlight dimmer switch assembly | |
| Harness or connector | - | |
| High beam headlights do not illuminate with "High Flash" function (passing function) | Headlight dimmer switch assembly | |
| Harness or connector | - | |
| Low beam headlights do not turn off | Headlight dimmer switch assembly | |
| Harness or connector | - | |
| High beam headlights do not turn off | Headlight dimmer switch assembly | |
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Clearance light on one side does not illuminate | Clearance light bulb (for HID Headlight) | - |
| Clearance light bulb (for Halogen Headlight) | - | |
| Harness or connector | - | |
| Taillight on one side does not illuminate (rear combination light) | Taillight bulb | - |
| Rear combination light socket and wire sub-assembly | ||
| Harness or connector | - | |
| Taillight on one side does not illuminate (rear light) | Taillight bulb | - |
| Rear light socket and wire | ||
| Harness or connector | - | |
| License plate light on one side does not illuminate | License plate light bulb | - |
| Harness or connector | - | |
| No lights illuminate | TAIL fuse | - |
| Taillight relay (for HID Headlight) | - | |
| Headlight dimmer switch assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Stop light on one side does not illuminate | Stop light bulb | - |
| Harness or connector | - | |
| Rear combination light socket and wire sub-assembly | ||
| Center stop light does not illuminate | Center stop light assembly | |
| Harness or connector | - | |
| No lights illuminate | STOP fuse | - |
| Stop light switch assembly | ||
| Harness or connector | - |
| 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) | FOG fuse | - |
| Headlight dimmer switch assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Hazard warning lights do not operate (turn signal lights are normal) (for Automatic Air Conditioning System) | TURN-HAZ fuse | - |
| Integration panel sub-assembly | ||
| No. 1 cooler wire | ||
| Air conditioning amplifier assembly | ||
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| Hazard warning lights do not operate (turn signal lights are normal) (for Manual Air Conditioning System) | TURN-HAZ fuse | - |
| Hazard warning signal switch assembly | ||
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| Turn signal lights do not operate (hazard warning lights are normal) | ECU-IG&GAUGE fuse | - |
| Headlight dimmer switch assembly | ||
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| Hazard warning lights and turn signal lights do not operate | TURN-HAZ fuse and ECU-IG&GAUGE fuse | - |
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| Turn signal lights do not operate in one direction | Headlight dimmer switch assembly | |
| Turn signal flasher assembly | ||
| Harness or connector | - | |
| Front turn signal light does not illuminate | Front turn signal light bulb (for HID Headlight) | - |
| Front turn signal light bulb (for Halogen Headlight) | - | |
| 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 | - | |
| Rear combination light socket and wire sub-assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Back-up light on one side does not illuminate | Back-up light bulb | - |
| Rear light socket and wire | ||
| Harness or connector | - | |
| Both left and right back-up lights do not illuminate | ECU-IG&GAUGE fuse | - |
| Back-up light switch assembly (for R150 Manual Transmission) | ||
| Back-up light switch assembly (for R150F / R151F Manual Transmission) | ||
| Park/neutral position switch assembly (for A343E Automatic Transmission) | ||
| Park/neutral position switch assembly (for A343F Automatic Transmission) | ||
| Park/neutral position switch assembly (for A750F Automatic Transmission) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Automatic light control system does not operate | ECU-B fuse and ECU-IG&GAUGE fuse | - |
| Automatic light control sensor | ||
| Headlight dimmer switch assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Light auto turn-off system does not operate | ECU-B fuse and ECU-IG&GAUGE fuse | - |
| Automatic light control sensor | ||
| Headlight dimmer switch assembly | ||
| Front door courtesy light switch assembly LH | ||
| Combination meter assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Manual headlight leveling control system does not operate | Headlight leveling switch | |
| Headlight unit | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Headlight beam level control system warning light comes on | Warning light circuit | |
| Headlight leveling ECU assembly | ||
| Headlight beam level control does not operate (warning light is off) | Check the fail-safe function | |
| Headlight beam level control actuator circuit | ||
| Headlight signal circuit | ||
| Headlight leveling ECU power source circuit | ||
| Vehicle speed signal circuit | ||
| Headlight leveling ECU assembly | ||
| Headlight beam level control system warning light does not come on when turning the ignition switch ON | Warning light circuit | |
| Headlight leveling ECU power source circuit | ||
| Headlight leveling ECU assembly | ||
| Combination meter assembly | ||
| DTC information cannot be detected | Diagnosis circuit | |
| Initialization cannot be performed | LVL terminal circuit |
| Symptom | Suspected Area | See page |
|---|---|---|
| No. 1 room light (for center) and No. 1 room light (for rear) do not illuminate for illuminated entry system | Front door courtesy light switch assembly | |
| Rear door courtesy light switch assembly | ||
| Back door lock assembly (back door courtesy light switch) | ||
| Harness or connector | - | |
| Combination meter assembly | ||
| Ignition key cylinder light does not illuminate for illuminated entry system | Wireless door lock control system (w/ Wireless Door Lock Control System) | |
| Transponder key amplifier (w/ Engine Immobiliser System ) | ||
| Key cylinder light assembly (w/o Engine Immobiliser System) | - | |
| Front door courtesy light switch assembly LH | ||
| Harness or connector | - | |
| Combination meter assembly | ||
| Driver side junction block assembly (integration relay) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Map light does not illuminate | Map light bulb | - |
| Map light assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| No. 1 room light (for center) does not illuminate | No. 1 room light bulb (for center) | - |
| No. 1 room light assembly (for center) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| No. 1 room light (for rear) does not illuminate | No. 1 room light bulb (for rear) | - |
| No. 1 room light assembly (for rear) | ||
| Harness or connector | - |