LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE

Note

Before replacing the main body ECU (multiplex network body ECU), refer to Service Bulletin.
When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
If the forward recognition camera has been replaced with a new one, be sure to perform Forward Recognition Camera Learning.

Click here
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.

Headlight
Symptom	Suspected Area	Link
Left low beam headlight does not illuminate.	Headlight unit assembly LH	Click here
Left low beam headlight does not illuminate.	No. 1 headlight ECU sub-assembly LH	Click here
Right low beam headlight does not illuminate.	Headlight unit assembly RH	Click here
Right low beam headlight does not illuminate.	No. 1 headlight ECU sub-assembly RH	Click here
Both left and right low beam headlights do not illuminate.	Headlight dimmer switch circuit	Click here
Both left and right low beam headlights do not illuminate.	Main body ECU (multiplex network body ECU)	Click here
Left high beam headlight does not illuminate	Headlight unit assembly LH	Click here
Left high beam headlight does not illuminate	No. 1 headlight ECU sub-assembly LH	Click here
Right high beam headlight does not illuminate	Headlight unit assembly RH	Click here
Right high beam headlight does not illuminate	No. 1 headlight ECU sub-assembly RH	Click here
Both left and right high beam headlights do not illuminate	Headlight dimmer switch circuit	Click here
Both left and right high beam headlights do not illuminate	Main body ECU (multiplex network body ECU)	Click here
High Flash (passing function) does not operate (high beam headlights are normal)	Headlight dimmer switch circuit	Click here
	Main body ECU (multiplex network body ECU)	Click here
Left low beam headlight, high beam headlight, front side marker light, daytime running light and parking light do not illuminate.	No. 1 headlight ECU sub-assembly LH	Click here
Right low beam headlight, high beam headlight, front side marker light, daytime running light and parking light do not illuminate.	No. 1 headlight ECU sub-assembly RH	Click here

Clearance Light
Symptom	Suspected Area	Link
Left clearance light does not illuminate.	Clearance Light/Daytime running light circuit	Click here
Left clearance light does not illuminate.	No. 1 headlight ECU sub-assembly LH	Click here
Right clearance light does not illuminate.	Clearance Light/Daytime running light circuit	Click here
Right clearance light does not illuminate.	No. 1 headlight ECU sub-assembly RH	Click here
Both left and right clearance lights do not illuminate.	Headlight dimmer switch circuit	Click here
Both left and right clearance lights do not illuminate.	Main body ECU (multiplex network body ECU)	Click here

Daytime Running Light
Symptom	Suspected Area	Link
Left daytime running light does not illuminate.	Clearance Light/Daytime running light circuit	Click here
Left daytime running light does not illuminate.	No. 1 headlight ECU sub-assembly LH	Click here
Right daytime running light does not illuminate.	Clearance Light/Daytime running light circuit	Click here
Right daytime running light does not illuminate.	No. 1 headlight ECU sub-assembly RH	Click here
Both left and right daytime running lights do not illuminate.	Headlight dimmer switch circuit	Click here
	Main body ECU (multiplex network body ECU)	Click here

Taillight, License Plate Light
Symptom	Suspected Area	Link
Left taillight (rear combination light assembly) do not illuminate.	Rear combination light lens and body LH	Click here
	Harness or connector	-
Right taillight (rear combination light assembly) do not illuminate.	Rear combination light lens and body RH	Click here
	Harness or connector	-
License plate light does not illuminate.	License plate light sub-assembly	Click here
License plate light does not illuminate.	Harness or connector	-
All of the taillights and license plate lights do not illuminate.	Taillight circuit	Click here
	Main body ECU (multiplex network body ECU)	Click here

Stop Light
Symptom	Suspected Area	Link
Left stop light (rear combination light assembly) does not illuminate.	Rear combination light lens and body LH	Click here
	Harness or connector	-
Right stop light (rear combination light assembly) does not illuminate.	Rear combination light lens and body RH	Click here
	Harness or connector	-
Both left and right stop light (rear combination light assembly) does not illuminate.	Stop light switch assembly	Click here
	No. 3 semiconductor power integration ECU	Click here
	Harness or connector	-

Center Stop Light
Symptom	Suspected Area	Link
Center stop light does not illuminate.	Center stop light assembly	Click here
	Light wire	Click here
	Harness or connector	-

Back-up Light
Symptom	Suspected Area	Link
Back-up lights do not illuminate.	Back-up light circuit	Click here

Rear Fog Light (w/ Rear Fog Light)
Symptom	Suspected Area	Link
Rear fog light do not illuminate (taillights are normal).	Headlight dimmer switch circuit	Click here
Rear fog light do not illuminate (taillights are normal).	Rear fog light circuit	Click here

Turn Signal Light
Symptom	Suspected Area	Link
Front turn and side turn signal lights do not operate in one direction.	Turn signal switch circuit	Click here
	Meter/gauge system	Click here
Rear side turn signal lights do not operate in one direction.	Turn signal switch circuit	Click here
	Meter/gauge system	Click here
All turn signal lights do not operate.	Turn signal switch circuit	Click here
All turn signal lights do not operate.	Combination meter assembly	Click here
Left front turn signal light does not operate.	Meter/gauge system	Click here
	Front turn signal light assembly LH	Click here
	Harness or connector	-
Right front turn signal light does not operate.	Meter/gauge system	Click here
	Front turn signal light assembly RH	Click here
	Harness or connector	-
Left rear turn signal light does not operate.	Meter/gauge system	Click here
	Rear combination light lens and body LH	Click here
	Harness or connector	-
Right rear turn signal light does not operate.	Meter/gauge system	Click here
	Rear combination light lens and body RH	Click here
	Harness or connector	-
Left side turn signal light does not operate.	Meter/gauge system	Click here
	Side turn signal light assembly LH	Click here
	Outer mirror actuator assembly LH	Click here
	Front multiplex network door ECU LH	Click here
	Harness or connector	-
Right side turn signal light does not operate.	Meter/gauge system	Click here
	Side turn signal light assembly RH	Click here
	Outer mirror actuator assembly RH	Click here
	Front multiplex network door ECU RH	Click here
	Harness or connector	-
All turn signal lights do not flash at the correct speed.	Combination meter assembly	Click here

Hazard Warning Signal Light
Symptom	Suspected Area	Link
Hazard warning signal lights do not operate.	Hazard warning switch circuit	Click here
Hazard warning signal lights do not operate.	Combination meter assembly	Click here

Cornering Light (w/ Cornering Light)
Symptom	Suspected Area	Link
Left cornering light does not illuminate.	Check operating conditions	Click here
	Cornering light circuit	Click here
	No. 1 headlight ECU sub-assembly LH	Click here
Right cornering light does not illuminate.	Check operating conditions	Click here
	Cornering light circuit	Click here
	No. 1 headlight ECU sub-assembly RH	Click here
Both left and right cornering lights does not illuminate.	Check operating conditions	Click here
Both left and right cornering lights does not illuminate.	No. 1 headlight ECU sub-assembly LH	Click here

Automatic Light Control System
Symptom	Suspected Area	Link
Automatic light control system does not operate.	Headlight dimmer switch circuit	Click here
Automatic light control system does not operate.	Main body ECU (multiplex network body ECU)	Click here

Light Auto Turn-off System
Symptom	Suspected Area	Link
Light auto turn-off system does not operate.	Headlight dimmer switch circuit	Click here
	IG signal circuit	Click here
	Door courtesy switch circuit	Click here
	Main body ECU (multiplex network body ECU)	Click here

Welcome Light Illumination Control
Symptom	Suspected Area	Link
Welcome light illumination control does not operate.	Check customize parameters (Light up Clearance Lights at Door Unlock Function)	Click here
Welcome light illumination control does not operate.	Main body ECU (multiplex network body ECU)	Click here

Outside Handle Light Control
Symptom	Suspected Area	Link
Outside handle lights do not illuminate.	Exterior illumination circuit	Click here
Outside handle lights do not illuminate.	Main body ECU (multiplex network body ECU)	Click here

Follow Me Home System (w/ Follow Me Home System)
Symptom	Suspected Area	Link
Follow me home system does not operate.	IG signal circuit	Click here
	Headlight dimmer switch circuit	Click here
	Main body ECU (multiplex network body ECU)	Click here

Automatic Headlight Beam Level Control System
Symptom	Suspected Area	Link
Automatic headlight beam level control system does not operate (Left Headlight).	Headlight beam level control actuator circuit	Click here
	No. 1 headlight ECU sub-assembly LH	Click here
Automatic headlight beam level control system does not operate (Right Headlight).	Headlight beam level control actuator circuit	Click here
	No. 1 headlight ECU sub-assembly RH	Click here
Both left and right automatic headlight beam level control system does not operate.	No. 1 headlight ECU sub-assembly LH	Click here

Automatic High Beam System (w/ Automatic High Beam System)
Symptom	Suspected Area	Link
Automatic high beam system does not operate or operation indicator does not illuminate.	Check automatic high beam indicator light	Click here
	Check Data List (Auto H Beam STS)
	Check Active Test (Automatic High Beam Indicator)
	Check automatic high beam main switch
	Harness or connector