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 | - |
| Discharge headlight bulb (Low) | - | |
| Harness or connector | - | |
| Light control ECU (for HID Headlight) | - | |
| Both left and right low beam headlights do not illuminate. | Light control switch circuit | |
| Headlight relay circuit | ||
| Harness or connector | - | |
| Main body ECU (Instrument panel junction block assembly) | - | |
| Headlight on one side does not change to high beam. | H-LP LH HI fuse or H-LP RH HI fuse | - |
| Headlight assembly | ||
| Harness or connector | - | |
| Both left and right headlights do not change to high beam (low beam headlights are normal). | Light control switch circuit | |
| Headlight (HI-BEAM) circuit | ||
| Harness or connector | - | |
| Main body ECU (Instrument panel junction block assembly) | - | |
| High beam headlights do not illuminate with "High Flash" function (passing function). | Light control switch circuit | |
| Main body ECU (Instrument panel junction block assembly) | - | |
| Low beam headlights or high beam headlights do not turn off. | Headlight dimmer switch assembly | |
| Harness or connector | - | |
| Main body ECU (Instrument panel junction block assembly) | - |
| 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) | - | |
| Harness or connector | - | |
| Both left and right low beam headlights do not illuminate. | Light control switch circuit | |
| Headlight relay circuit | ||
| Harness or connector | - | |
| Main body ECU (Instrument panel junction block assembly) | - | |
| High beam headlight on one side does not illuminate. | H-LP LH HI fuse or H-LP RH HI fuse | - |
| Headlight bulb (High) | - | |
| Harness or connector | - | |
| Both left and right high beam headlights do not illuminate (low beam headlights are normal). | Light control switch circuit | |
| Headlight (HI-BEAM) circuit | ||
| Harness or connector | - | |
| Main body ECU (Instrument panel junction block assembly) | - | |
| High beam headlights do not illuminate with "High Flash" function (passing function). | Light control switch circuit | |
| Main body ECU (Instrument panel junction block assembly) | - | |
| Low beam headlights or high beam headlights do not turn off. | Headlight dimmer switch assembly | |
| Harness or connector | - | |
| Main body ECU (Instrument panel junction block assembly) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Clearance light does not illuminate (for Halogen Headlight). | Clearance light bulb (for Halogen Headlight) | - |
| Harness or connector | - | |
| Headlight assembly (for HID Headlight) | ||
| Headlight assembly (for Halogen Headlight) | ||
| Taillight does not illuminate. | Taillight bulb | - |
| Rear combination light assembly (w/ Rear No. 2 Seat) | ||
| Rear combination light assembly (w/o Rear No. 2 Seat) | ||
| Harness or connector | - | |
| License plate light does not illuminate. | License plate light bulb | - |
| Harness or connector | - | |
| All lights do not illuminate. | TAIL fuse | - |
| Light control switch circuit | ||
| Taillight relay circuit | ||
| Main body ECU (Instrument panel junction block assembly) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Stop light on one side does not illuminate. | Rear combination light assembly (w/ Rear No. 2 Seat) | |
| Rear combination light assembly (w/o Rear No. 2 Seat) | ||
| Harness or connector | - | |
| Center stop light does not illuminate. | Center stop light assembly | |
| Harness or connector | - | |
| All lights do not operate. | STOP fuse | - |
| Stop light switch assembly | ||
| Stop light control relay (for LHD) | ||
| Stop light control relay (for RHD) | ||
| 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). | FR FOG fuse | - |
| Front fog light circuit | ||
| Light control switch circuit | ||
| Main body ECU (Instrument panel junction block assembly) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Rear fog light does not illuminate. | RR FOG fuse | - |
| Rear fog light bulb | - | |
| Rear fog light circuit | ||
| Light control switch circuit | ||
| Main body ECU (Instrument panel junction block assembly) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Hazard warning lights do not operate (turn signal lights are normal). | TRN-HAZ fuse | - |
| Hazard warning signal switch assembly | ||
| Turn signal flasher assembly (for LHD) | ||
| Turn signal flasher assembly (for RHD) | ||
| Harness or connector | - | |
| Turn signal lights do not operate (hazard warning lights are normal). | ECU-IG NO. 2 fuse | - |
| Headlight dimmer switch assembly (Turn signal switch) | ||
| Turn signal flasher assembly (for LHD) | ||
| Turn signal flasher assembly (for RHD) | ||
| 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 (for LHD) | ||
| Turn signal flasher assembly (for RHD) | ||
| Harness or connector | - | |
| Turn signal lights do not operate in one direction. | Headlight dimmer switch assembly (Turn signal switch) | |
| Turn signal flasher assembly (for LHD) | ||
| Turn signal flasher assembly (for RHD) | ||
| Harness or connector | - | |
| Front turn signal light does not illuminate. | Front turn signal light bulb | - |
| Harness or connector | - | |
| Side turn signal light does not illuminate. | Side turn signal light bulb | - |
| Outer rear view mirror assembly | ||
| Harness or connector | - | |
| Rear turn signal light does not illuminate. | Rear turn signal light bulb | - |
| Rear combination light assembly (w/ Rear No. 2 Seat) | ||
| Rear combination light assembly (w/o Rear No. 2 Seat) | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Back-up light does not illuminate. | ECU-IG NO. 2 fuse | - |
| Back-up light bulb | - | |
| Back-up light switch assembly (for EA65 Manual Transaxle) | ||
| Back-up light switch assembly (for EA62 Manual Transaxle) | ||
| Back-up light switch assembly (for EC61 Manual Transaxle) | ||
| Back-up light switch assembly (for EC62 Manual Transaxle) | ||
| Park/neutral position switch assembly (for U660E Automatic Transaxle) | ||
| Park/neutral position switch assembly (for K311 CVT) | ||
| Rear combination light assembly (w/ Rear No. 2 Seat) | ||
| Rear combination light assembly (w/o Rear No. 2 Seat) | ||
| Harness or connector |
| Symptom | Suspected Area | See page |
|---|---|---|
| Automatic light control system does not operate. | Check for DTCs | |
| Light control switch circuit | ||
| IG signal circuit | ||
| Main body ECU (Instrument panel junction block assembly) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Light auto turn off system does not operate. | Light control switch circuit | |
| IG signal circuit | ||
| Main body ECU (Instrument panel junction block assembly) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Follow me home system does not operate. | Light control switch circuit | |
| Main body ECU (Instrument panel junction block assembly) | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Manual headlight leveling control system does not operate. | Headlight leveling switch (for LHD) | |
| Headlight leveling switch (for RHD) | ||
| Headlight assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | See page |
|---|---|---|
| Headlight beam level control system warning light comes on. | Check for DTCs | |
| Warning light circuit | ||
| Headlight leveling ECU assembly (for LHD) | ||
| Headlight leveling ECU assembly (for RHD) | ||
| 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 (for LHD) | ||
| Headlight leveling ECU assembly (for RHD) | ||
| 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 (for LHD) | ||
| Headlight leveling ECU assembly (for RHD) | ||
| Combination meter assembly | ||
| DTC information cannot be detected. | Diagnosis circuit | |
| Headlight leveling ECU assembly (for LHD) | ||
| Initialization cannot be performed. | Check for DTCs | |
| LVL terminal circuit | ||
| Headlight leveling ECU assembly (for LHD) | ||
| Headlight leveling ECU assembly (for RHD) | ||
| Combination meter assembly |
| Symptom | Suspected Area | See page |
|---|---|---|
| Daytime running light system does not operate. | CAN communication system | |
| Light control switch circuit | ||
| DRL relay circuit | ||
| Parking brake switch assembly | ||
| Clearance light bulb (for Halogen Headlight) | - | |
| Headlight assembly (for HID Headlight) | ||
| Headlight assembly (for Halogen Headlight) | ||
| Harness or connector | - | |
| Main body ECU (Instrument panel junction block assembly) | - |
Note
-
Initialize the headlight leveling ECU after the vehicle height changes due to replacement of the suspension or after performing such operations as removal and reinstallation or replacement of the rear height control sensor sub-assembly.
-
Initialization is also necessary when the headlight leveling ECU is replaced.