LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE

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.

Illuminated Entry System
Symptom	Suspected Area	See page
Only front interior light does not illuminate.	Map light assembly	Click here
Only front interior light does not illuminate.	Harness or connector	-
Only rear interior light does not illuminate.	Spot light assembly	Click here
Only rear interior light does not illuminate.	Harness or connector	-
Only footwell light does not illuminate.	Footwell light	Click here
Only footwell light does not illuminate.	Harness or connector	-
Only power switch illumination does not illuminate.	Power switch illumination circuit	Click here
	Certification ECU (Smart key ECU assembly)	-
	Main body ECU (Multiplex network body ECU)	Click here
Illuminated entry system does not operate normally.	DOME fuse	-
	Door courtesy switch circuit	Click here
	Door unlock detection switch circuit	Click here
	Driver side door control switch circuit	Click here
	Front passenger side door control switch circuit	Click here
	IG signal circuit	Click here
	ACC signal circuit	Click here
	Interior light circuit	Click here
	Power switch illumination circuit	Click here
	Certification ECU (Smart key ECU assembly)	-
	Main body ECU (Multiplex network body ECU)	Click here

Vanity Light
Symptom	Suspected Area	See page
Vanity light does not illuminate.	Bulb	-
Vanity light does not illuminate.	Harness or connector	-

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

Courtesy Light
Symptom	Suspected Area	See page
Courtesy light does not illuminate.	Bulb	-
	Courtesy light assembly	Click here
	Door courtesy switch circuit	Click here
	Door courtesy light circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here

Battery Saving Control
Symptom	Suspected Area	See page
Battery saving function does not operate.	Door courtesy switch circuit	Click here
	IG signal circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here

Luggage Compartment Light (w/o Power Back Door)
Symptom	Suspected Area	See page
Luggage compartment light does not illuminate.	Bulb	-
	Luggage compartment light assembly	Click here
	Back door courtesy switch	Click here
	Harness or connector	-

Luggage Compartment Light (w/ Power Back Door)
Symptom	Suspected Area	See page
Luggage compartment light does not illuminate. (Power back door system operates normally.)	Bulb	-
	Back door courtesy switch circuit	Click here
	Luggage compartment light circuit	Click here
	Power back door unit assembly	Click here

Console Box Light
Symptom	Suspected Area	See page
Console box light does not illuminate.	Console box light	Click here
Console box light does not illuminate.	Harness or connector	-

Front Personal Light
Symptom	Suspected Area	See page
Front door courtesy light does not illuminate.	Bulb	-
	Map light assembly	Click here
	Harness or connector	-

Rear Personal Light
Symptom	Suspected Area	See page
Rear room light does not illuminate.	Bulb	-
Rear room light does not illuminate.	Harness or connector	-

Center Console Spot Light
Symptom	Suspected Area	See page
Center console spot light does not illuminate.	Center console illumination circuit	Click here
	IG signal circuit	Click here
	ACC signal circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here

Instrument Panel Illumination (for RHD)
Symptom	Suspected Area	See page
All of instrument panel illumination lights do not come on. (Taillights operate normally.)	PANEL fuse	-
	Harness or connector	-

Instrument Panel Illumination (for LHD)
Symptom	Suspected Area	See page
All of instrument panel illumination lights do not come on when taillights are turned on by the automatic light control or manual light control. (Taillights operate normally.)	PANEL fuse	-
	Instrument panel illumination circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
All of instrument panel illumination lights come on when taillights are turned on by the daytime running light control. (Taillights operate normally.)	Instrument panel illumination circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here