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 | Link |
|---|---|---|
| Low beam headlight on one side does not illuminate. | H-LP LH-LO fuse or H-LP RH-LO fuse | - |
| Discharge headlight bulb | ||
| Harness or connector | - | |
| Headlight light control ECU sub-assembly | ||
| Both left and right low beam headlights do not illuminate. | Headlight dimmer switch circuit | |
| Headlight relay circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| High beam flash function does not operate. | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| 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). | Headlight dimmer switch circuit | |
| Headlight (High beam) circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| Discharge headlight bulb is dark. | Discharge headlight bulb | |
| Harness or connector | - | |
| Headlight light control ECU sub-assembly | ||
| Clearance lights do not illuminate. | Harness or connector | - |
| Headlight unit (w/ Daytime Running Light) | ||
| Clearance light bulb (w/o Daytime Running Light) | ||
| Headlight unit |
| Symptom | Suspected Area | Link |
|---|---|---|
| Low beam headlight on one side does not illuminate. | H-LP LH-LO fuse or H-LP RH-LO fuse | - |
| Harness or connector | - | |
| Headlight unit | ||
| Both left and right low beam headlights do not illuminate. | Headlight dimmer switch circuit | |
| Headlight relay circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| High beam flash function does not operate. | Headlight dimmer switch circuit | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| 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). | Headlight dimmer switch circuit | |
| Headlight (High beam) circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) | ||
| Clearance lights do not illuminate. | Harness or connector | - |
| Headlight unit (w/ Daytime Running Light) | ||
| Clearance light bulb (w/o Daytime Running Light) | ||
| Headlight unit |
| Symptom | Suspected Area | Link |
|---|---|---|
| Low beam headlight on one side does not illuminate. | H-LP LH-LO fuse or H-LP RH-LO fuse | - |
| Harness or connector | - | |
| Headlight unit | ||
| Both left and right low beam headlights do not illuminate. | Headlight dimmer switch circuit | |
| Headlight relay circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| High beam flash function does not operate. | Headlight dimmer switch circuit | |
| 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) | ||
| Running light relay | ||
| Harness or connector | - | |
| Both left and right high beam headlights do not illuminate. | Headlight dimmer switch circuit | |
| Headlight (High beam) circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | ||
| Parking lights do not illuminate. | Harness or connector | - |
| Parking light bulb | ||
| Side marker light do not illuminate. | Harness or connector | - |
| Side marker light bulb |
| Symptom | Suspected Area | Link |
|---|---|---|
| Front fog light does not illuminate (taillight is normal). | FOG FR fuse | - |
| Front fog light bulb (w/o Side Marker Light) | ||
| Front fog light bulb (w/ Side Marker Light) | ||
| Headlight dimmer switch circuit | ||
| Front fog light circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) |
| Symptom | Suspected Area | Link |
|---|---|---|
| Rear fog light does not illuminate (taillight is normal). | FOG RR fuse | - |
| Rear fog light bulb | ||
| Headlight dimmer switch circuit | ||
| Rear fog light circuit | ||
| Harness or connector | - | |
| Rear fog light assembly | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) |
| Symptom | Suspected Area | Link |
|---|---|---|
| License plate light does not illuminate. | License plate light bulb | |
| License plate light assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Taillight does not illuminate (rear combination light). | Taillight bulb | |
| Rear combination light socket and wire sub-assembly | ||
| Harness or connector | - | |
| Taillight does not illuminate (rear light). | Taillight bulb | |
| Rear light lens and body | ||
| Harness or connector | - | |
| All lights do not illuminate | Headlight dimmer switch circuit | |
| Taillight relay circuit | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) |
| Symptom | Suspected Area | Link |
|---|---|---|
| Stop light on one side does not illuminate. | Stop light bulb | |
| Rear combination light socket and wire sub-assembly | ||
| Harness or connector | - | |
| Center stop light does not illuminate. | Center stop light assembly | |
| Harness or connector | - | |
| All lights do not operate (w/ Stop Light Control Relay). | Vehicle stability control system | |
| STOP fuse | - | |
| ECU-IG NO. 3 fuse | - | |
| STOP LP relay | - | |
| Stop light switch assembly | ||
| Harness or connector | - | |
| All light do not operate (w/o Stop Light Control Relay). | STOP fuse | - |
| Stop light switch assembly | ||
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| Back-up light on one side does not illuminate. | Back-up light bulb | |
| Back up light socket | ||
| Harness or connector | - | |
| Both left and right back-up lights do not illuminate. | GAUGE fuse | - |
| Park/neutral position switch assembly (for U660F Automatic Transaxle) | ||
| Park/neutral position switch assembly (for U760E Automatic Transaxle) | ||
| Park/neutral position switch assembly (for U760F Automatic Transaxle) | ||
| Park/neutral position switch assembly (for K111 CVT) | ||
| Park/neutral position switch assembly (for K111F CVT) | ||
| Back-up light switch assembly (for EA64 Manual Transaxle) | ||
| Back-up light switch assembly (for EA64F Manual Transaxle) | ||
| Back-up light switch assembly (for EB61 Manual Transaxle) | ||
| Back-up light switch assembly (for EB61F Manual Transaxle) | ||
| Back-up light switch assembly (for EB63F Manual Transaxle) | ||
| Harness or connector | - |
| Symptom | Suspected Area | Link |
|---|---|---|
| No turn signal lights operate. | Turn signal switch circuit | |
| Harness or connector | - | |
| Combination meter assembly | ||
| One of the turn signal lights does not operate. | Meter/gauge system |
| Symptom | Suspected Area | Link |
|---|---|---|
| Hazard warning lights do not operate (turn signal lights are normal). | TURN&HAZ fuse | - |
| Hazard warning switch circuit | ||
| Combination meter assembly | ||
| Harness or connector | - | |
| Emergency brake signal (hazard warning light blink) does not operate (w/ Emergency Brake Signal) | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Vehicle stability control system | ||
| Combination meter assembly |
| Symptom | Suspected Area | Link |
|---|---|---|
| Automatic light control system does not operate. | Headlight dimmer switch circuit | |
| IG signal circuit | ||
| Automatic light control sensor | ||
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) |
| Symptom | Suspected Area | Link |
|---|---|---|
| Light auto turn-off system does not operate. | Headlight dimmer switch circuit | |
| Door courtesy switch circuit | ||
| IG signal circuit | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) |
| Symptom | Suspected Area | Link |
|---|---|---|
| Daytime running light does not operate. | CAN communication system (for LHD) | |
| CAN communication system (for RHD) | ||
| Headlight dimmer switch circuit | ||
| Parking brake switch circuit | ||
| DRL relay circuit | ||
| Harness or connector | - | |
| Headlight unit (for HID Headlight) | ||
| Headlight unit (for Halogen Headlight) | ||
| Main body ECU (Multiplex network body ECU) (for LHD) | ||
| Main body ECU (Multiplex network body ECU) (for RHD) |