Problem Symptoms Table [11/2023 - ]

NOTE:

Before replacing the main body ECU (multiplex network body ECU), refer to Registration.
for HV Model: Refer to REGISTRATION [11/2023 - ]

for Gasoline Model: Refer to REGISTRATION [11/2023 - ]
When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

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	Refer to "LO-beam Headlight does not Illuminate"	Refer to LO-beam Headlight does not Illuminate [11/2023 - ]
Left or right low beam headlight and parking light does not turn off	Harness or connector (H-LP relay - Main body ECU (Multiplex network body ECU) (HRY2/HRLY terminal))	-
Both left and right low beam headlights do not illuminate	Headlight dimmer switch circuit	Refer to Headlight Dimmer Switch Circuit [11/2023 - ]
Both left and right low beam headlights do not illuminate	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]
Left or right high beam headlight does not illuminate	Headlight assembly	Refer to INSPECTION [09/2020 - ]
Left or right high beam headlight does not illuminate	Harness or connector	-
Both left and right high beam headlights do not illuminate	Headlight dimmer switch circuit	Refer to Headlight Dimmer Switch Circuit [11/2023 - ]
	High beam headlight circuit	Refer to High Beam Headlight Circuit [11/2023 - ]
	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]
High Flash (passing function) does not operate (high beam headlights are normal)	Headlight dimmer switch circuit	Refer to Headlight Dimmer Switch Circuit [11/2023 - ]
	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]

PARKING LIGHT

Symptom	Suspected Area	Link
Left or right parking light does not illuminate*1	Headlight assembly	Refer to INSPECTION [09/2020 - ]
Left or right parking light does not illuminate*1	Harness or connector	-
Left or right parking light does not illuminate*2	Front turn signal light bulb	Refer to REPLACEMENT [12/2019 - ]
Left or right parking light does not illuminate*2	Harness or connector	-
Both left and right parking lights do not illuminate	Taillight relay circuit	Refer to Taillight Relay Circuit [11/2023 - ]
Both left and right parking lights do not illuminate	Harness or connector	-

*1: for LED Type
*2: for Bulb Type

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 [12/2019 - ]
	Front side maker light socket and wire	Refer to DISASSEMBLY [12/2019 - ]
	Harness or connector	-
Both left and right front side marker lights do not illuminate	Taillight relay circuit	Refer to Taillight Relay Circuit [11/2023 - ]
	Harness or connector	-

FRONT FOG LIGHT (W/ FRONT FOG LIGHT)

Symptom	Suspected Area	Link
Left or right front fog light does not illuminate	Fog light assembly	Refer to INSPECTION [09/2020 - ]
Left or right front fog light does not illuminate	Harness or connector	-
Both left and right front fog lights do not illuminate	Headlight dimmer switch circuit	Refer to Headlight Dimmer Switch Circuit [11/2023 - ]
	Front fog light circuit	Refer to Front Fog Light Circuit [11/2023 - ]
	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]

DAYTIME RUNNING LIGHT

Symptom	Suspected Area	Link
Left or right daytime running light does not illuminate	Headlight assembly	Refer to INSPECTION [09/2020 - ]
Left or right daytime running light does not illuminate	Harness or connector	-
Both left and right daytime running lights do not illuminate	Check customize settings*	Refer to CUSTOMIZE PARAMETERS [11/2023 - ]
	Daytime running light circuit	Refer to Daytime Running Light Circuit [11/2023 - ]
	Headlight dimmer switch circuit	Refer to Headlight Dimmer Switch Circuit [11/2023 - ]
	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]

*: for vehicles with customize setting "DRL Function"

TAILLIGHT

Symptom	Suspected Area	Link
Left or right taillight (rear combination light assembly) does not illuminate	Rear combination light assembly	Refer to INSPECTION [12/2019 - ]
	Harness or connector	-
Left or right taillight (rear light assembly) does not illuminate	Rear light assembly	Refer to INSPECTION [12/2019 - ]
	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 [11/2023 - ]
	Taillight relay circuit	Refer to Taillight Relay Circuit [11/2023 - ]
	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]

REAR SIDE MARKER LIGHT

Symptom	Suspected Area	Link
Left or right rear side marker light does not illuminate	Rear combination light assembly	Refer to INSPECTION [12/2019 - ]

LICENSE PLATE LIGHT

Symptom	Suspected Area	Link
Left or right license plate light does not illuminate	License plate light bulb	Refer to REPLACEMENT [12/2019 - ]
	Harness or connector	-
	License plate light assembly	Refer to REMOVAL [12/2019 - ]
Both left and right license plate lights do not illuminate	Taillight relay circuit	Refer to Taillight Relay Circuit [11/2023 - ]
Both left and right license plate lights do not illuminate	Harness or connector	-

STOP LIGHT

Symptom	Suspected Area	Link
Left or right stop light does not illuminate	Rear combination light assembly	Refer to INSPECTION [12/2019 - ]
Left or right stop light does not illuminate	Harness or connector	-
All of the stop lights do not illuminate	STOP fuse	-
	Stop light switch assembly	Refer to ON-VEHICLE INSPECTION [12/2019 - ]
	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 [12/2019 - ]
High mounted stop light does not illuminate	Harness or connector	-

BACK-UP LIGHT

Symptom	Suspected Area	Link
Left or right back-up light does not illuminate	Back-up light bulb	Refer to REPLACEMENT [12/2019 - ]
	Rear light assembly	Refer to REMOVAL [12/2019 - ]
	Harness or connector	-
Both left and right back-up lights do not illuminate*1	Back-up light circuit	Refer to Back-up Light Circuit [11/2023 - ]
Both left and right back-up lights do not illuminate*2	BKUP LP fuse	-
	ECU-ACC fuse	-
	Park/neutral position switch assembly	Refer to INSPECTION [10/2022 - ]
	Power distribution box assembly	Refer to REMOVAL [11/2023 - ]
	Harness or connector	-

*1: for HV Model
*2: for Gasoline Model

TURN SIGNAL LIGHT

Symptom	Suspected Area	Link
Left or right front turn signal light does not operate	Front turn signal light bulb	Refer to REPLACEMENT [12/2019 - ]
	Front turn signal light socket	Refer to DISASSEMBLY [12/2019 - ]
	Headlight assembly	Refer to REMOVAL [11/2023 - ]
	Harness or connector	-
Left or right rear turn signal light does not operate	Rear turn signal light bulb	Refer to REPLACEMENT [12/2019 - ]
	Rear combination light assembly	Refer to REMOVAL [11/2023 - ]
	Harness or connector	-
Left or right side turn signal light does not operate	Side turn signal light assembly	Refer to INSPECTION [12/2019 - ]
	Outer rear view mirror assembly	Refer to REMOVAL [11/2023 - ]
	Outer mirror control ECU assembly*	Refer to REMOVAL [12/2019 - ]
	Harness or connector	-
Turn signal lights do not operate in one direction	Turn signal switch circuit	Refer to Turn Signal Switch Circuit [12/2019 - ]
Turn signal lights do not operate in one direction	Meter/gauge system	for 12.3 Inch Display: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] except 12.3 Inch Display: Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]
All turn signal lights do not operate	Turn signal switch circuit	Refer to Turn Signal Switch Circuit [12/2019 - ]
All turn signal lights do not operate	Combination meter assembly	Refer to REMOVAL [12/2019 - ]
All turn signal lights do not flash at the correct speed	Combination meter assembly	Refer to REMOVAL [12/2019 - ]

*: w/ 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 [10/2022 - ]
Hazard warning signal lights do not operate	Combination meter assembly	Refer to REMOVAL [12/2019 - ]

DOOR MIRROR FOOT LIGHT (W/ DOOR MIRROR FOOT LIGHT)

Symptom	Suspected Area	Link
Left or right door mirror foot light does not illuminate	Door mirror foot light circuit	Refer to Door Mirror Foot Light Circuit [11/2023 - ]
Left or right door mirror foot light does not illuminate	Outer mirror control ECU assembly	Refer to REMOVAL [12/2019 - ]
Both left and right door mirror foot lights do not illuminate	Check customize settings	Refer to CUSTOMIZE PARAMETERS [11/2023 - ]
	Power door lock control system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]
	Wireless door lock control system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]
	Smart key system (for entry function)	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]
	Door unlock detection switch circuit	Refer to Door Unlock Detection Switch Circuit [11/2023 - ]
	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]

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 [11/2023 - ]
Automatic light control system does not operate	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]

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 [11/2023 - ]
	IG signal circuit	Refer to IG Signal Circuit [11/2023 - ]
	Front door courtesy switch circuit	Refer to Front Door Courtesy Switch Circuit [11/2023 - ]
	Rear door courtesy switch circuit	Refer to Rear Door Courtesy Switch Circuit [11/2023 - ]
	Back door courtesy switch circuit	Refer to Back Door Courtesy Switch Circuit [11/2023 - ]
	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]

REMOTE OPERATION FUNCTION (W/ TELEMATICS SYSTEM)

Symptom	Suspected Area	Link
Lights do not operate using remote operation function (Lighting system is normal)	Telematics system	Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

WIPER-LINKED LOW BEAM HEADLIGHT CONTROL SYSTEM

Symptom	Suspected Area	Link
Wiper-linked low beam headlight control system does not operate	Check customize settings	Refer to CUSTOMIZE PARAMETERS [11/2023 - ]
	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]

WELCOME LIGHT ILLUMINATION CONTROL

Symptom	Suspected Area	Link
Welcome light illumination control does not operate	Check customize settings	Refer to CUSTOMIZE PARAMETERS [11/2023 - ]
Welcome light illumination control does not operate	Main body ECU (Multiplex network body ECU)	Refer to REMOVAL [11/2023 - ]

AUTOMATIC HIGH BEAM SYSTEM

Symptom	Suspected Area	Link
Automatic high beam system does not operate or automatic high beam indicator does not illuminate (low beam headlights and high beam headlights are normal)	Front radar sensor system	Refer to Automatic High Beam System does not Operate or Operation Indicator does not Illuminate [11/2023 - ]
	Check Data List (Front Recognition Camera High Temperature 2)
	Check automatic high beam indicator light
	Check Data List (Automatic High Beam Headlights Sensor Detection Status)
	Perform Active Test (Multi Display All (White))
	Auto high beam switch
	Harness or connector
	Combination meter assembly
	Forward recognition camera
	Main body ECU (Multiplex network body ECU)
Auto high beam switch indicator does not come ON	Refer to "Automatic High Beam Switch Indicator does not Come ON"	Refer to Automatic High Beam Switch Indicator does not Come ON [11/2023 - ]