Problem Symptoms Table [09/2015 - 12/2017]
NOTE:
Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
Refer to REGISTRATION [09/2015 - 08/2019]
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 or right low beam headlight does not illuminate (for TMC Made) | H-LP LH-LO fuse or H-LP RH-LO fuse | - |
| Headlight unit | Refer to DISASSEMBLY [09/2015 - 08/2019] | |
| Semiconductor pwr integration ECU | Refer to INSPECTION [09/2015 - ] | |
| Harness or connector | - | |
| Left or right low beam headlight does not illuminate (for TMMC Made) | H-LP LH-LO fuse or H-LP RH-LO fuse | - |
| Headlight assembly | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Semiconductor pwr integration ECU | Refer to INSPECTION [09/2015 - ] | |
| Harness or connector | - | |
| Both left and right low beam headlights do not illuminate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [09/2015 - 08/2019] |
| Low beam headlight circuit | Refer to Low Beam Headlight Circuit [09/2015 - 08/2019] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Left or right high beam headlight does not illuminate (for TMC Made) | Headlight unit | Refer to DISASSEMBLY [09/2015 - 08/2019] |
| Semiconductor pwr integration ECU | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Harness or connector | - | |
| Left or right high beam headlight does not illuminate (for TMMC Made) | Headlight assembly | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] |
| Semiconductor pwr integration ECU | Refer to INSPECTION [09/2015 - ] | |
| Harness or connector | - | |
| Both left and right high beam headlights do not illuminate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [09/2015 - 08/2019] |
| High beam headlight circuit | Refer to High Beam Headlight Circuit [09/2015 - 08/2019] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| "High Flash" (passing function) does not operate (high beam headlights are normal) | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [09/2015 - 08/2019] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] |
FRONT SIDE MARKER LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right front side marker light does not illuminate | Front side marker light bulb | Refer to REPLACEMENT [09/2015 - 08/2019] |
| Headlight unit | Refer to DISASSEMBLY [09/2015 - 08/2019] | |
| Harness or connector | - |
PARKING LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right parking light does not illuminate | Headlight unit | Refer to DISASSEMBLY [09/2015 - 08/2019] |
| Harness or connector | - |
TAILLIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right taillight and rear side marker light (rear combination light assembly) do not illuminate | Rear combination light assembly | Refer to INSPECTION [09/2015 - ] |
| Harness or connector | - | |
| Left or right taillight (rear light assembly) does not illuminate | Rear light assembly | Refer to INSPECTION [09/2015 - ] |
| Harness or connector | - | |
| All of the parking lights, front side marker lights, taillights, license plate lights and rear side marker lights do not illuminate | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [09/2015 - 08/2019] |
| Taillight relay circuit | Refer to Taillight Relay Circuit [09/2015 - 08/2019] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] |
LICENSE PLATE LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right license plate light does not illuminate | License plate light assembly | Refer to INSPECTION [09/2015 - ] |
| Harness or connector | - |
STOP LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right stop light (rear combination light assembly) does not illuminate | Rear combination light assembly | Refer to INSPECTION [09/2015 - ] |
| Harness or connector | - | |
| Left or right stop light (rear light assembly) does not illuminate | Rear light assembly | Refer to INSPECTION [09/2015 - ] |
| Harness or connector | - | |
| Center stop light does not illuminate | Center stop light assembly | Refer to INSPECTION [09/2015 - ] |
| Harness or connector | - | |
| All of the stop lights do not illuminate | STOP fuse | - |
| Stop light switch assembly | Refer to ON-VEHICLE INSPECTION [09/2015 - ] | |
| Semiconductor pwr integration ECU | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Harness or connector | - |
FRONT FOG LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right front fog light does not illuminate | Fog light assembly | Refer to INSPECTION [09/2015 - 08/2019] |
| Harness or connector | - | |
| Both left and right front fog lights do not illuminate (taillights are normal) | Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [09/2015 - 08/2019] |
| Front fog light circuit | Refer to Front Fog Light Circuit [09/2015 - 08/2019] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] |
BACK-UP LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right back-up light does not illuminate | Back-up light bulb | Refer to REPLACEMENT [09/2015 - ] |
| Rear light assembly | Refer to INSPECTION [09/2015 - ] | |
| Harness or connector | - | |
| Both left and right back-up lights do not illuminate | BKUP LP fuse | - |
| Park/neutral position switch assembly (for U881E Automatic Transmission) | Refer to INSPECTION [09/2015 - ] | |
| Park/neutral position switch assembly (for U881F Automatic Transmission) | Refer to INSPECTION [09/2015 - ] | |
| Instrument panel junction block assembly | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Harness or connector | - |
TURN SIGNAL LIGHT
| Symptom | Suspected Area | Link |
|---|---|---|
| Left or right front turn signal light does not operate | Meter / gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] |
| Front turn signal light bulb | Refer to REPLACEMENT [09/2015 - 08/2019] | |
| Headlight unit (for TMC Made) | Refer to DISASSEMBLY [09/2015 - 08/2019] | |
| Headlight assembly (for TMMC Made) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Harness or connector | - | |
| Left or right rear turn signal light does not operate | Meter / gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] |
| Rear turn signal light bulb | Refer to REPLACEMENT [09/2015 - 12/2017] | |
| Rear combination light assembly | Refer to INSPECTION [09/2015 - ] | |
| Harness or connector | - | |
| Left or right side turn signal light does not operate | Side turn signal light assembly | Refer to INSPECTION [09/2015 - ] |
| Outer rear view mirror assembly | Refer to REMOVAL [09/2015 - ] | |
| Outer mirror control ECU assembly | Refer to REMOVAL [09/2015 - ] | |
| Harness or connector | - | |
| Turn signal lights do not operate in one direction | Meter / gauge system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] |
| Turn signal switch circuit | Refer to Turn Signal Switch Circuit [09/2015 - 08/2019] | |
| All turn signal lights do not operate | Turn signal switch circuit | Refer to Turn Signal Switch Circuit [09/2015 - 08/2019] |
| Combination meter assembly | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| All turn signal lights do not flash at the correct speed | Combination meter assembly | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] |
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 [09/2015 - 08/2019] |
| Combination meter assembly | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Hazard warning signal switch indicator does not illuminate | Radio receiver assembly (hazard warning signal switch) | Refer to INSPECTION [09/2015 - 08/2019] |
| Combination meter assembly | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Harness or connector | - |
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 [09/2015 - 08/2019] |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] |
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 [09/2015 - 08/2019] |
| IG signal circuit | Refer to IG Signal Circuit [09/2015 - ] | |
| Front door courtesy switch circuit | Refer to Door Courtesy Switch Circuit [09/2015 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] |
DAYTIME RUNNING LIGHT SYSTEM
| Symptom | Suspected Area | Link |
|---|---|---|
| Daytime running light system does not operate (both left and right daytime running lights do not illuminate) | Check customize settings | Refer to CUSTOMIZE PARAMETERS [09/2015 - 12/2017] |
| Electric parking brake system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - 08/2019] | |
| Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [09/2015 - 08/2019] | |
| Daytime running light relay circuit | Refer to Daytime Running Light Relay Circuit [09/2015 - 08/2019] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Left or right daytime running light does not illuminate | Headlight unit (for TMC Made) | Refer to DISASSEMBLY [09/2015 - 08/2019] |
| Headlight assembly (for TMMC Made) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Harness or connector | - |
OUTSIDE HANDLE FOOT LIGHT CONTROL
| Symptom | Suspected Area | Link |
|---|---|---|
| All of the outside handle foot lights do not illuminate | Power door lock control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] |
| Wireless door lock control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] | |
| Smart access system with push-button start (for Entry Function) | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] | |
| Outside handle foot light circuit | Refer to Outside Handle Foot Light Circuit [09/2015 - 08/2019] | |
| Door unlock detection switch circuit | Refer to Door Unlock Detection Switch Circuit [09/2015 - ] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] | |
| Left or right front outside handle foot light does not illuminate | Front door outside handle assembly | Refer to INSPECTION [09/2015 - ] |
| Harness or connector | - | |
| Left or right rear outside handle foot light does not illuminate | Rear door outside handle assembly | Refer to INSPECTION [09/2015 - ] |
| Harness or connector | - |
WELCOME LIGHT ILLUMINATION CONTROL
| Symptom | Suspected Area | Link |
|---|---|---|
| Welcome light illumination control does not operate | Wireless door lock control system | Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] |
| Headlight dimmer switch circuit | Refer to Headlight Dimmer Switch Circuit [09/2015 - 08/2019] | |
| Main body ECU (Multiplex network body ECU) | Refer to REMOVAL [09/2015 - 08/2016] Refer to REMOVAL [08/2016 - 08/2019] |