Problem Symptoms Table [03/2019 - 01/2023]
NOTE:
- Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Refer to REGISTRATION [03/2019 - 09/2020] , or refer to REGISTRATION [09/2020 - 01/2023]
- If the headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.
Refer to INITIALIZATION [03/2019 - ]
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
| Symptom | Suspected Area | Link |
|---|---|---|
| Left low beam headlight does not illuminate | Headlight unit assembly LH | Refer to DISASSEMBLY [03/2019 - ] |
| Headlight ECU sub-assembly LH | Refer to REMOVAL [03/2019 - ] | |
| Right low beam headlight does not illuminate | Headlight unit assembly RH | Refer to DISASSEMBLY [03/2019 - ] |
| Headlight ECU sub-assembly RH | Refer to REMOVAL [03/2019 - ] | |
| Both left and right low beam headlights do not illuminate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [03/2019 - 11/2021] , or refer to Headlight Dimmer Switch Circuit [11/2021 - ] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| Left high beam headlight does not illuminate | High beam headlight circuit | Refer to High Beam Headlight Circuit [03/2019 - ] |
| Headlight ECU sub-assembly LH | Refer to REMOVAL [03/2019 - ] | |
| Right high beam headlight does not illuminate | High beam headlight circuit | Refer to High Beam Headlight Circuit [03/2019 - ] |
| Headlight ECU sub-assembly RH | Refer to REMOVAL [03/2019 - ] | |
| Both left and right high beam headlights do not illuminate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [03/2019 - 11/2021] , or refer to Headlight Dimmer Switch Circuit [11/2021 - ] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| High Flash (passing function) does not operate (high beam headlights are normal) | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [03/2019 - 11/2021] , or refer to Headlight Dimmer Switch Circuit [11/2021 - ] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| Left low beam headlight and high beam headlight do not illuminate | Power source circuit | Refer to Power Source Circuit [03/2019 - ] |
| Headlight ECU sub-assembly LH | Refer to REMOVAL [03/2019 - ] | |
| Right low beam headlight and high beam headlight do not illuminate | Power source circuit | Refer to Power Source Circuit [03/2019 - ] |
| Headlight ECU sub-assembly RH | Refer to REMOVAL [03/2019 - ] |
PARKING LIGHT/DAYTIME RUNNING LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left parking light/daytime running light does not illuminate | Parking light/daytime running light circuit | Refer to Parking Light/Daytime Running Light Circuit [03/2019 - ] |
| Headlight ECU sub-assembly LH | Refer to REMOVAL [03/2019 - ] | |
| Right parking light/daytime running light does not illuminate | Parking light/daytime running light circuit | Refer to Parking Light/Daytime Running Light Circuit [03/2019 - ] |
| Headlight ECU sub-assembly RH | Refer to REMOVAL [03/2019 - ] | |
| Both left and right parking lights do not illuminate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [03/2019 - 11/2021] , or refer to Headlight Dimmer Switch Circuit [11/2021 - ] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] | |
| Both left and right daytime running lights do not illuminate | Check customize settings | Refer to CUSTOMIZE PARAMETERS [03/2019 - ] |
| CAN communication system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [03/2019 - 01/2023] | |
| Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [03/2019 - 11/2021] , or refer to Headlight Dimmer Switch Circuit [11/2021 - ] | |
| Parking brake switch circuit | Refer to Parking Brake Switch Circuit [03/2019 - 01/2023] | |
| Parking light/daytime running light circuit | Refer to Parking Light/Daytime Running Light Circuit [03/2019 - ] | |
| Harness or connector | - | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] |
FRONT SIDE MARKER LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left front side marker light does not illuminate | Front marker light assembly LH | Refer to INSPECTION [03/2019 - ] |
| Harness or connector | - | |
| Right front side marker light does not illuminate | Front marker light assembly RH | Refer to INSPECTION [03/2019 - ] |
| Harness or connector | - | |
| Both left and right front side marker lights do not illuminate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [03/2019 - 11/2021] , or refer to Headlight Dimmer Switch Circuit [11/2021 - ] |
| Taillight relay circuit | Refer to Taillight Relay Circuit [03/2019 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] |
TAILLIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right taillight (rear combination light assembly) does not illuminate | Rear combination light lens and body | Refer to INSPECTION [09/2014 - ] |
| Rear combination light socket and wire sub-assembly | Refer to DISASSEMBLY [03/2019 - ] | |
| Harness or connector | - | |
| Left or right taillight (rear light assembly) does not illuminate | Rear light lens and body | Refer to INSPECTION [09/2014 - ] |
| Rear light socket and wire | Refer to DISASSEMBLY [03/2019 - ] | |
| Harness or connector | - | |
| All of the taillights, license plate lights and rear side marker lights do not illuminate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [03/2019 - 11/2021] , or refer to Headlight Dimmer Switch Circuit [11/2021 - ] |
| Taillight relay circuit | Refer to Taillight Relay Circuit [03/2019 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] |
REAR SIDE MARKER LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right rear side marker light does not illuminate | Rear combination light lens and body | Refer to INSPECTION [09/2014 - ] |
| Rear combination light socket and wire sub-assembly | Refer to DISASSEMBLY [03/2019 - ] |
LICENSE PLATE LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| License plate light does not illuminate | License plate light assembly | Refer to INSPECTION [09/2014 - ] |
| Harness or connector | - |
STOP LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right stop light (rear combination light assembly) does not illuminate | Rear combination light lens and body | Refer to INSPECTION [09/2014 - ] |
| Rear combination light socket and wire sub-assembly | Refer to DISASSEMBLY [03/2019 - ] | |
| Harness or connector | - | |
| Left or right stop light (rear light assembly) does not illuminate | Rear light lens and body | Refer to INSPECTION [09/2014 - ] |
| Rear light socket and wire | Refer to DISASSEMBLY [03/2019 - ] | |
| Harness or connector | - | |
| All of the stop lights do not illuminate | STOP fuse | - |
| Stop light switch assembly | Refer to ON-VEHICLE INSPECTION [09/2014 - ] | |
| Semiconductor pwr integration ECU | Refer to REMOVAL [09/2014 - ] | |
| Harness or connector | - |
HIGH MOUNTED STOP LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| High mounted stop light does not illuminate | Center stop light assembly | Refer to INSPECTION [09/2014 - ] |
| Harness or connector | - |
BACK-UP LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right back-up light does not illuminate | Rear light lens and body | Refer to INSPECTION [09/2014 - ] |
| Rear light socket and wire | Refer to DISASSEMBLY [03/2019 - ] | |
| Harness or connector | - | |
| Both left and right back-up lights do not illuminate | BKUP LP fuse | - |
| Park/neutral position switch assembly | Refer to INSPECTION [09/2014 - ] | |
| Harness or connector | - | |
| Instrument panel junction block assembly | Refer to REMOVAL [09/2014 - ] |
TURN SIGNAL LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right front turn signal light does not operate | Headlight ECU sub-assembly | Refer to REMOVAL [03/2019 - ] |
| Headlight unit assembly | Refer to DISASSEMBLY [03/2019 - ] | |
| Harness or connector | - | |
| Left or right side turn signal light does not operate | Side turn signal light assembly | Refer to INSPECTION [09/2014 - ] |
| Outer rear view mirror assembly | Refer to REMOVAL [03/2019 - ] | |
| Outer mirror control ECU assembly* | Refer to REMOVAL [09/2014 - ] | |
| Harness or connector | - | |
| Left or right rear turn signal light does not operate | Rear turn signal light bulb | Refer to REPLACEMENT [03/2019 - ] |
| Harness or connector | - | |
| Turn signal lights do not operate in one direction | Turn signal switch circuit | Refer to Turn Signal Switch Circuit [03/2019 - ] |
| Meter/gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - ] | |
| All turn signal lights do not operate | Turn signal switch circuit | Refer to Turn Signal Switch Circuit [03/2019 - ] |
| 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 - ] |
- *: w/ Seat Position Memory
HAZARD WARNING SIGNAL LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Hazard warning signal lights do not operate | Hazard warning switch circuit | Refer to Hazard Warning Switch Circuit [03/2019 - ] |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] | |
| Hazard warning signal switch do not flash | Harness or connector | - |
| Hazard warning switch assembly | Refer to INSPECTION [09/2014 - ] | |
| Combination meter assembly | Refer to REMOVAL [09/2014 - ] |
AUTOMATIC LIGHT CONTROL SYSTEM
| Symptom | Suspected Area | Link |
|---|---|---|
| Automatic light control system does not operate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [03/2019 - 11/2021] , or refer to Headlight Dimmer Switch Circuit [11/2021 - ] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] |
LIGHT AUTO TURN-OFF SYSTEM
| Symptom | Suspected Area | Link |
|---|---|---|
| Light auto turn-off system does not operate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [03/2019 - 11/2021] , or refer to Headlight Dimmer Switch Circuit [11/2021 - ] |
| IG signal circuit | Refer to IG Signal Circuit [09/2014 - ] | |
| Door courtesy switch circuit | Refer to Door Courtesy Switch Circuit [09/2014 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] |
OUTSIDE HANDLE FOOT LIGHT CONTROL
| Symptom | Suspected Area | Link |
|---|---|---|
| All of the outside handle foot lights do not illuminate | Check customize settings | Refer to CUSTOMIZE PARAMETERS [03/2019 - ] |
| Power door lock control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - ] | |
| Wireless door lock control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - ] | |
| Smart access system with push-button start (for entry function) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2014 - 01/2023] | |
| Door unlock detection switch circuit | Refer to Door Unlock Detection Switch Circuit [09/2014 - ] | |
| Outside handle foot light circuit | Refer to Outside Handle Foot Light Circuit [03/2019 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] |
WELCOME LIGHT ILLUMINATION CONTROL
| Symptom | Suspected Area | Link |
|---|---|---|
| Welcome light illumination control does not operate | Check customize settings | Refer to CUSTOMIZE PARAMETERS [03/2019 - ] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2014 - ] |