Problem Symptoms Table [09/2014 - ]
HINT:
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.
HEADLIGHT AND TAILLIGHT (FOR HALOGEN HEADLIGHT)
| Symptom | Suspected Area | See Test |
|---|---|---|
| One side low beam headlight does not illuminate | H-LP LH-LO fuse or H-LP RH-LO fuse | - |
| Bulb | - | |
| Harness or connector | - | |
| Both left and right low beam headlights do not illuminate | Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] |
| Low beam headlight circuit | Refer to LOW BEAM HEADLIGHT CIRCUIT [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| One side high beam headlight does not illuminate | Bulb | - |
| Harness or connector | - | |
| Engine room junction block assembly | Refer to REMOVAL [09/2014 - ] | |
| Both left and right high beam headlights do not illuminate | Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] |
| High beam headlight circuit | Refer to HIGH BEAM HEADLIGHT CIRCUIT [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| "High Flash" (passing function) does not illuminate (high beam headlights are normal) | Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] |
| Instrument panel junction block assembly | Refer to REMOVAL [09/2014 - ] | |
| One side parking light does not illuminate | Bulb | - |
| Daytime running light assembly | Refer to REMOVAL [09/2014 - ] | |
| Harness or connector | - | |
| One side license plate light does not illuminate | Bulb | - |
| Harness or connector | - | |
| One side front side marker light does not illuminate | Bulb | - |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [09/2014 - ] | |
| One side taillight/rear side marker light does not illuminate | Bulb | - |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [09/2014 - ] | |
| All of the lights (taillights/rear side marker lights, front side marker lights, parking lights and license plate lights) do not illuminate (TAIL fuse is normal) | Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] |
| Taillight relay circuit | Refer to TAILLIGHT RELAY CIRCUIT [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| All of the lights (taillights/rear side marker lights, front side marker lights, parking lights and license plate lights) do not illuminate (Although the TAIL fuse is replaced the fuse breaks again) | License plate light assembly | Refer to INSPECTION [09/2014 - ] |
| Rear combination light assembly | Refer to ON-VEHICLE INSPECTION [09/2014 - ] | |
| Headlight assembly | Refer to REMOVAL [09/2014 - ] | |
| Harness or connector | - |
HEADLIGHT AND TAILLIGHT (FOR LED HEADLIGHT)
| Symptom | Suspected Area | See Test |
|---|---|---|
| One side low beam headlight does not illuminate | H-LP LH-LO fuse or H-LP RH-LO fuse | - |
| Harness or connector | - | |
| Headlight unit | Refer to DISASSEMBLY [09/2014 - ] | |
| Both left and right low beam headlights do not illuminate | Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] |
| Low beam headlight circuit | Refer to LOW BEAM HEADLIGHT CIRCUIT [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| One side high beam headlight does not illuminate | H-LP HI LH fuse or H-LP HI RH fuse | - |
| Harness or connector | - | |
| Headlight unit | Refer to REMOVAL [09/2014 - ] | |
| Both left and right high beam headlights do not illuminate | Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] |
| High beam headlight circuit | Refer to HIGH BEAM HEADLIGHT CIRCUIT [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| "High Flash" (passing function) does not illuminate (high beam headlights are normal) | Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| One side parking light does not illuminate | Daytime running light assembly | - |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [09/2014 - ] | |
| One side license plate light does not illuminate | Bulb | - |
| Harness or connector | - | |
| One front side marker light does not illuminate | Bulb | - |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [09/2014 - ] | |
| One side taillight/rear side marker light does not illuminate | Bulb | - |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [09/2014 - ] | |
| All of the lights (taillights/rear side marker lights, front side marker lights, parking lights and license plate lights) do not illuminate (TAIL fuse is normal) | Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] |
| Taillight relay circuit | Refer to TAILLIGHT RELAY CIRCUIT [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| All of the lights (taillights/rear side marker lights, front side marker lights, parking lights and license plate lights) do not illuminate (Although the TAIL fuse is replaced the fuse breaks again) | License plate light assembly | Refer to INSPECTION [09/2014 - ] |
| Rear combination light assembly | Refer to ON-VEHICLE INSPECTION [09/2014 - ] | |
| Headlight assembly | Refer to REMOVAL [09/2014 - ] | |
| Harness or connector | - |
STOP LIGHT
| Symptom | Suspected Area | See Test |
|---|---|---|
| One side stop light does not illuminate | Bulb | - |
| Harness or connector | - | |
| High mounted stop light does not illuminate | High mounted stop light assembly | Refer to INSPECTION [09/2014 - ] |
| Radio setting condenser | Refer to ON-VEHICLE INSPECTION [09/2014 - ] | |
| Harness or connector | - | |
| All of the stop lights do not illuminate | STOP fuse | - |
| STOP relay* | Refer to ON-VEHICLE INSPECTION [09/2014 - ] | |
| Stop light switch assembly | Refer to INSPECTION [09/2014 - ] | |
| Harness or connector | - | |
| All of the stop lights do not turn off | STOP relay* | Refer to ON-VEHICLE INSPECTION [09/2014 - ] |
| Stop light switch assembly | Refer to INSPECTION [09/2014 - ] | |
| Harness or connector | - |
- *: w/ Dynamic Radar Cruise Control System
BACK-UP LIGHT
| Symptom | Suspected Area | See Test |
|---|---|---|
| One side back-up light does not illuminate | Bulb | - |
| Harness or connector | - | |
| Both left and right back-up lights do not illuminate | BKUP-LP fuse | - |
| BACKUP LP RLY relay | Refer to ON-VEHICLE INSPECTION [09/2014 - ] | |
| Park/neutral position switch assembly (for U660E A/T) | Refer to INSPECTION [09/2014 - ] | |
| Park/neutral position switch assembly (for U760E A/T) | Refer to INSPECTION [09/2014 - ] | |
| Harness or connector | - |
TURN SIGNAL LIGHT
| Symptom | Suspected Area | See Test |
|---|---|---|
| One side turn signal light does not operate (except side turn signal lights) | Bulb | - |
| Harness or connector | - | |
| Side turn signal light does not operate | Side turn signal light assembly | Refer to INSPECTION [09/2014 - ] |
| Harness or connector | - | |
| Turn signal lights do not operate in one direction | Turn signal switch circuit | Refer to TURN SIGNAL SWITCH CIRCUIT [09/2014 - ] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Harness or connector | - | |
| All turn signal lights do not operate | Turn signal switch circuit | Refer to TURN SIGNAL SWITCH CIRCUIT [09/2014 - ] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| All turn signal lights do not flash at the correct speed | Combination meter assembly | Refer to REMOVAL [09/2014 - ] |
HAZARD WARNING LIGHT
| Symptom | Suspected Area | See Test |
|---|---|---|
| Hazard warning lights do not operate | Hazard warning switch circuit | Refer to HAZARD WARNING SWITCH CIRCUIT [09/2014 - ] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] |
AUTOMATIC LIGHT CONTROL SYSTEM
| Symptom | Suspected Area | See Test |
|---|---|---|
| Automatic light control system does not operate | Check DTCs | Refer to DTC CHECK / CLEAR [09/2014 - ] |
| Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] |
LIGHT AUTO TURN-OFF SYSTEM
| Symptom | Suspected Area | See Test |
|---|---|---|
| Light auto turn-off system does not operate | Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] |
| Front door courtesy switch circuit | Refer to FRONT DOOR COURTESY SWITCH CIRCUIT [09/2014 - ] | |
| Rear door courtesy switch circuit | Refer to REAR DOOR COURTESY SWITCH CIRCUIT [09/2014 - ] | |
| IG signal circuit | Refer to IG SIGNAL CIRCUIT [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] |
DAYTIME RUNNING LIGHT SYSTEM
| Symptom | Suspected Area | See Test |
|---|---|---|
| Daytime running light system does not operate (both left and right daytime running lights do not illuminate) | CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - ] |
| Headlight dimmer switch circuit | Refer to HEADLIGHT DIMMER SWITCH CIRCUIT [09/2014 - ] | |
| IG signal circuit | Refer to IG SIGNAL CIRCUIT [09/2014 - ] | |
| Parking brake switch circuit | Refer to PARKING BRAKE SWITCH CIRCUIT [09/2014 - ] | |
| Daytime running light relay circuit | Refer to DAYTIME RUNNING LIGHT RELAY CIRCUIT [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| One side daytime running light does not illuminate*1 | Bulb | - |
| Engine room junction block assembly | Refer to REMOVAL [09/2014 - ] | |
| Harness or connector | - | |
| One side daytime running light does not illuminate*2 | Daytime running light assembly | Refer to REMOVAL [09/2014 - ] |
| Harness or connector | - | |
| The daytime running lights do not turn off when a turn signal switch or the hazard warning light switch is turned on*2 | Check turn signal light or hazard warning light function | - |
| Daytime running light assembly | Refer to INSPECTION [09/2014 - ] | |
| Harness or connector | - |
- *1: for DRL Bulb Type
- *2: for DRL LED Type