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	Link
Illuminated entry system does not operate.	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Entry and start system (for entry function) (w/ Entry and Start System)	Click here
	DOME fuse	-
	Interior light circuit	Click here
	Door unlock detection switch circuit	Click here
	Door courtesy switch circuit	Click here
	Back door courtesy switch circuit	Click here
	IG signal circuit	Click here
	ACC signal circuit	Click here
	Interior light auto cut circuit	Click here
	Harness or connector	-
	Main body ECU (Multiplex network body ECU) (for LHD)	Click here
	Main body ECU (Multiplex network body ECU) (for RHD)	Click here

Map Light Assembly
Symptom	Suspected Area	Link
Map light assembly does not illuminate.	Map light bulb	Click here
	Map light assembly	Click here
	Harness or connector	-

No. 1 Room Light Assembly
Symptom	Suspected Area	Link
No. 1 room light assembly does not illuminate.	No. 1 room light bulb	Click here
No. 1 room light assembly does not illuminate.	Harness or connector	-

No. 2 Room Light Assembly
Symptom	Suspected Area	Link
No. 2 room light assembly does not illuminate.	No. 2 room light bulb	Click here
	No. 2 room light assembly	Click here
	Back door lock assembly (back door courtesy light switch)	Click here
	Harness or connector	-

Vanity Light Assembly
Symptom	Suspected Area	Link
Vanity light assembly does not illuminate.	Vanity light bulb	-
	Visor assembly	Click here
	Harness or connector	-

Center Console Illumination Light (w/ Center Console Illumination Light)
Symptom	Suspected Area	Link
Upper console panel sub-assembly (center console illumination light) does not illuminate.	Upper console panel sub-assembly (center console illumination light)	Click here
	Harness or connector	-

Battery Saving Control System
Symptom	Suspected Area	Link
Battery saving function (basic function) does not operate.	Door courtesy switch circuit	Click here
	Back door courtesy switch circuit	Click here
	IG signal circuit	Click here
	Harness or connector	-
	Main body ECU (Multiplex network body ECU) (for LHD)	Click here
	Main body ECU (Multiplex network body ECU) (for RHD)	Click here
Battery saving function (interior light auto cut function) does not operate.	Interior light auto cut circuit	Click here
	Main body ECU (Multiplex network body ECU) (for LHD)	Click here
	Main body ECU (Multiplex network body ECU) (for RHD)	Click here

Engine Switch Illumination System (w/ Entry and Start System)
Symptom	Suspected Area	Link
Engine switch illumination does not illuminate.	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Headlight dimmer switch circuit	Click here
	Engine switch illumination circuit	Click here
	Certification ECU (Smart key ECU assembly)	-
	Main body ECU (Multiplex network body ECU) (for LHD)	Click here
	Main body ECU (Multiplex network body ECU) (for RHD)	Click here

Instrument Panel Illumination System
Symptom	Suspected Area	Link
No instrument panel illumination lights come on (taillights operate normally).	PANEL fuse	-
	Harness or connector	-