LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE

Note

Before replacing the main ECU (multiplex network body ECU), refer to Service Bulletin.

Tech Tips

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.

Front Map Light
Symptom	Suspected Area	Link
Front map light LH or front map light RH does not illuminate	Map light assembly	Click here
	Harness or connector	-

Front Dome Light
Symptom	Suspected Area	Link
Front dome light does not illuminate	Interior light switch signal circuit	Click here
	Map light assembly	Click here
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)	Click here

Rear Interior Light
Symptom	Suspected Area	Link
Rear dome light does not illuminate	Spot light assembly	Click here
	Stop and start system*	Click here
	Interior light auto cut circuit*	Click here
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)	Click here

*: w/ Stop and start system

Vanity Light
Symptom	Suspected Area	Link
Vanity light assembly LH or vanity light assembly RH does not illuminate	Bulb	Click here
	Visor assembly	-
	Harness or connector	-

Door Courtesy Light
Symptom	Suspected Area	Link
Courtesy light assembly LH or courtesy light assembly RH does not illuminate	Bulb	-
	Courtesy light assembly	Click here
	Door courtesy switch circuit	Click here
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)	Click here

Scuff Light
Symptom	Suspected Area	Link
Scuff Light LH or scuff Light RH does not illuminate	Front door scuff plate	Click here
Scuff Light LH or scuff Light RH does not illuminate	Harness or connector	-
All scuff lights do not illuminate	Interior light circuit	Click here

Ambient Illumination Light
Symptom	Suspected Area	Link
Front door ambient illumination light LH or front door ambient illumination light RH does not illuminate*1	Front door trim board sub-assembly	Click here
	Harness or connector	-
Rear door ambient illumination light LH or rear door ambient illumination light RH does not illuminate*1	Rear door trim board sub-assembly	Click here
	Harness or connector	-
Instrument panel ambient illumination light does not illuminate*2	Interior illumination light sub-assembly	Click here
	Harness or connector	-
	Ambient illumination light circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
All ambient lights do not illuminate1, 2	Ambient illumination light circuit	Click here
All ambient lights do not illuminate1, 2	Main body ECU (Multiplex network body ECU)	Click here

*1: w/ Door ambient illumination light

*2: w/ Instrument panel ambient illumination light

Glove Box Light
Symptom	Suspected Area	Link
Glove box light does not illuminate	Glove box light assembly	Click here
Glove box light does not illuminate	Harness or connector	-

Luggage Compartment Room Light
Symptom	Suspected Area	Link
Luggage compartment room light LH, luggage compartment room light RH or luggage compartment room light (Back door) does not illuminate	Bulb	-
	No. 1 luggage compartment light assembly	Click here
	Harness or connector	-
All luggage compartment room light do not illuminate	Back door courtesy switch circuit	Click here
	Multiplex network door ECU*	Click here
	Main body ECU (Multiplex network body ECU)	Click here

*: w/ Power back door system

Instrument Panel Box Light and Footwell Light
Symptom	Suspected Area	Link
Footwell light LH or footwell light RH does not illuminate	No. 1 interior illumination light assembly(Footwell light)	Click here
Footwell light LH or footwell light RH does not illuminate	Harness or connector	-
Instrument panel box light does not illuminate	No. 1 interior illumination light assembly(Instrument panel box light)	Click here
Instrument panel box light does not illuminate	Harness or connector	-
Footwell light LH, footwell light RH and instrument panel box light does not illuminate	Instrument panel box light and footwell light circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here

Console Box Light
Symptom	Suspected Area	Link
Console Box light does not illuminate	No. 1 interior illumination light assembly(Console box light front)	Click here
	No. 1 interior illumination light assembly(Console box light rear)	Click here
	Harness or connector	-

Interior Light Power Source Control
Symptom	Suspected Area	Link
All the interior lights that receive power via the DOME CUT relay do not illuminate (The DOME fuse is normal)	Interior light auto cut circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here

Illuminated Entry System (Interior Light Control)
Symptom	Suspected Area	Link
All interior light control functions do not operate under any condition	Interior light switch signal circuit	Click here
	Interior light circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Door open/close-linked control function does not operate when doors are opened/closed	Door courtesy switch circuit	Click here
	Map light assembly	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Door lock/unlock-linked control function does not operate when doors are locked/unlocked	Door unlock detection switch circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Actuation area-linked control function does not operate when registered key is brought into any exterior detection area	CAN communication system	Click here
	Entry and start system (for Entry Function)	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Engine switch-linked control function does not operate when engine switch is operated	IG signal circuit	Click here
	ACC signal circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Engine switch illumination does not illuminate	CAN communication system	Click here
	Engine switch illumination circuit	Click here
	Certification ECU (Smart key ECU assembly)	-

Illuminated Entry System (Ambient Illumination Light)
Symptom	Suspected Area	Link
All interior light control functions do not operate under any condition	Ambient illumination light circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Engine switch-linked control function does not operate when engine switch is operated	IG signal circuit	Click here
	ACC signal circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here

Battery Saving Control
Symptom	Suspected Area	Link
Battery saving function does not operate	IG signal circuit	Click here
	ACC signal circuit	Click here
	Door courtesy switch circuit	Click here
	Back door courtesy switch circuit	Click here
	Interior light circuit	Click here
	Door unlock detection switch circuit	Click here
	Interior light auto cut circuit	Click here
	Multiplex network door ECU*	Click here
	Main body ECU (Multiplex network body ECU)	Click here

*: w/ Power back door system