LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE

Note

Inspect the fuses for circuits related to this system before performing the following procedure.
If the main body ECU (multiplex network body ECU) is replaced, 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.

Map Light Assembly
Symptom	Suspected Area	See page
Front map light LH or front map light RH does not illuminate	Map light assembly (LH Side)	Click here
	Map light assembly (RH Side)	Click here
	Harness or connector	-

Front Dome Light (Map Light Assembly)
Symptom	Suspected Area	See page
Front dome light does not illuminate	Map light assembly	Click here
	Interior Light Circuit	Click here
	Harness or connector	-
	No. 2 multiplex network body ECU	Click here
	Main body ECU (multiplex network body ECU) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	Click here

Rear Dome Light (No. 1 Room Light Assembly and No. 3 Room Light Assembly)
Symptom	Suspected Area	See page
Rear dome light does not illuminate	No. 1 Room Light Assembly	Click here
	No. 3 Room Light Assembly	Click here
	Interior Light Circuit	Click here
	Harness or connector	-
	No. 2 multiplex network body ECU	Click here
	Main body ECU (multiplex network body ECU) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	Click here

Vanity Light Assembly
Symptom	Suspected Area	See page
Vanity light assembly does not illuminate	Vanity light	Click here
	Visor assembly	Click here
	Harness or connector	-

Courtesy Light Assembly
Symptom	Suspected Area	See page
Courtesy light assembly does not illuminate	Front door courtesy light assembly	Click here
	Rear door courtesy light assembly	Click here
	Door courtesy switch 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

Front Door Scuff Plate
Symptom	Suspected Area	See page
Scuff light does not illuminate	Front door scuff plate	Click here
Scuff light does not illuminate	Harness or connector	-

Door Illumination Light
Symptom	Suspected Area	See page
Door illumination light does not illuminate	Front door trim board sub-assembly	Click here
	Rear door trim board sub-assembly	Click here
	Harness or connector	-
	Door Illumination 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

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	-

No. 1 Luggage Compartment Light Assembly*1
Symptom	Suspected Area	See page
No. 1 luggage compartment light assembly does not illuminate	No. 1 luggage compartment light assembly	Click here
	Harness or connector	-
	Back door courtesy switch circuit	Click here
	Power back door unit assembly (multiplex network door ECU)*2	Click here
	Main body ECU (multiplex network body ECU) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	Click here

*1: w/ Luggage Compartment Light
*2: w/ Power Back Door

Interior Foot Light Illumination
Symptom	Suspected Area	See page
Interior foot light illumination light does not illuminate	No. 1 interior illumination light assembly (front footwell light)	-
	No. 1 interior illumination light assembly (rear footwell light)	-
	Harness or connector	-
	Footwell Light 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

Outer Rear View Mirror Assembly (Door Mirror Foot Light)
Symptom	Suspected Area	See page
Door mirror foot light does not illuminate	Outer rear view mirror assembly	Click here
	Harness or connector	-
	Door mirror foot light circuit	Click here
	Outer Mirror Control ECU Assembly	Click here

Step Light Assembly
Symptom	Suspected Area	See page
Step light does not illuminate	Step light assembly	-
	Harness or connector	-
	Step Illumination Circuit	Click here
	No. 2 multiplex network body ECU	Click here
	Main body ECU (multiplex network body ECU) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	Click here

Door Inside Handle Illumination Light Assembly
Symptom	Suspected Area	See page
Door illumination light does not illuminate	Front door inside handle illumination light assembly	Click here
	Rear door inside handle illumination light assembly	Click here
	Harness or connector	-
	Inside Handle Illumination Light Circuit	Click here
	No. 2 multiplex network body ECU	Click here
	Main body ECU (multiplex network body ECU) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	Click here

Interior Light Power Source Control
Symptom	Suspected Area	See page
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) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	Click here

Illuminated Entry System (Interior Light Control)
Symptom	Suspected Area	See page
All interior light control functions do not operate under any condition	Interior light 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
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) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	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) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	Click here
Actuation area-linked control function does not operate when registered key is brought into any exterior detection area	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Entry and start system (for Start Function)	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-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) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	Click here
Engine switch illumination does not illuminate	CAN communication system (for LHD)	Click here
	CAN communication system (for RHD)	Click here
	Engine switch illumination circuit	Click here
	Certification ECU (Smart key ECU assembly)	-

Battery Saving Control
Symptom	Suspected Area	See page
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
	Power back door unit assembly (multiplex network door ECU)*	Click here
	Main body ECU (multiplex network body ECU) (for LHD)	Click here
	Main body ECU (multiplex network body ECU) (for RHD)	Click here

*: w/ Power Back Door