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 (Interior Light Control)
Symptom	Suspected Area	See page
Interior light control does not operate normally.	DOME fuse	-
	Front door courtesy switch circuit	Click here
	Rear door courtesy switch circuit	Click here
	Luggage compartment door courtesy switch circuit	Click here
	Door unlock detection switch circuit	Click here
	IG signal circuit	Click here
	ACC signal circuit	Click here
	CAN communication system	Click here
	Interior light circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Engine switch illumination does not illuminate.*1	CAN communication system	Click here
	Engine switch illumination circuit	Click here
	Certification ECU (Smart key ECU assembly)	-
Only personal light does not illuminate.3, 4	Bulb	-
Only personal light does not illuminate.3, 4	Roof console box assembly	Click here
Only rear interior light does not illuminate.3, 4	Bulb	-
	Spot light assembly	Click here
	Harness or connector	-
	Roof console box assembly	Click here
Only rear interior light does not illuminate.*5	Bulb	-
	Harness or connector	-
	Instrument panel junction block assembly	Click here
Only ignition key cylinder light does not illuminate.*2	Transponder key coil	Click here
	Harness or connector	-
	Instrument panel junction block assembly	Click here

*1: w/ Smart Entry and Start System
*2: w/o Smart Entry and Start System
*3: for TMC, TMMR Made
*4: for TMMK Made (w/ Sliding Roof)
*5: for TMMK Made (w/o Sliding Roof)

Illuminated Entry System (Inside Handle Illumination Light Control (for TMC, TMMR Made))
Symptom	Suspected Area	See page
Only one inside handle illumination light does not illuminate.	Harness or connector	-
	Door inside handle illumination light assembly	Click here
Inside handle illumination light control does not operate normally.	Front door courtesy switch circuit	Click here
	Rear door courtesy switch circuit	Click here
	Door unlock detection switch circuit	Click here
	IG signal circuit	Click here
	ACC signal circuit	Click here
	Inside handle illumination light circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Inside handle illumination light dimmer control does not operate.	CAN communication system	Click here
	Main body ECU (Multiplex network body ECU)	Click here

Illuminated Entry System (Footwell Light Control (for TMC, TMMR Made))
Symptom	Suspected Area	See page
Only one footwell light does not illuminate.	Harness or connector	-
Only one footwell light does not illuminate.	No. 1 interior illumination light assembly	Click here
Footwell light control does not operate normally.	Front door courtesy switch circuit	Click here
	Rear door courtesy switch circuit	Click here
	Door unlock detection switch circuit	Click here
	IG signal circuit	Click here
	ACC signal circuit	Click here
	Footwell light circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Footwell light dimmer control does not operate.	CAN communication system	Click here
Footwell light dimmer control does not operate.	Main body ECU (Multiplex network body ECU)	Click here

Battery Saving Control
Symptom	Suspected Area	See page
Battery saving function does not operate.	Front door courtesy switch circuit	Click here
	Rear door courtesy switch circuit	Click here
	Luggage compartment door courtesy switch circuit	Click here
	Door unlock detection switch circuit	Click here
	IG signal circuit	Click here
	ACC signal circuit	Click here
	Interior light auto cut circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here

Interior Light Power Source Control
Symptom	Suspected Area	See page
All the interior lights that receive power via the light 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
All the interior lights that receive power via the light cut relay do not illuminate. (Although the DOME fuse is replaced, the fuse breaks again.)	Roof console box assembly*1	Click here
	Roof console box assembly *4	Click here
	Courtesy light assembly	Click here
	Spot light assembly*1	Click here
	Spot light assembly*2	Click here
	Transponder key coil*3	Click here
	No. 1 luggage compartment light assembly	Click here
	Harness or connector (Including all light components that are part of the wire harness)	-

*1: for TMC, TMMR Made
*2: for TMMK Made (w/ Sliding Roof)
*3: w/o Smart Entry and Start System
*4: for TMMK Made

Personal Light
Symptom	Suspected Area	See page
Personal light does not illuminate.	Bulb	-
	Roof console box assembly*1	Click here
	Roof console box assembly*2	Click here
	Harness or connector	-

*1: for TMC, TMMR Made
*2: for TMMK Made

Center Console Spot Light
Symptom	Suspected Area	See page
Center console spot light does not illuminate.	Roof console box assembly*1	Click here
	Roof console box assembly*2	Click here
	Harness or connector	-

Rear Spot Light
Symptom	Suspected Area	See page
Rear spot light does not illuminate.1, 2	Spot light assembly*1	Click here
	Spot light assembly*2	Click here
	Harness or connector	-

*1: for TMC, TMMR Made
*2: for TMMK Made (w/ Sliding Roof)

Rear Interior Light
Symptom	Suspected Area	See page
Rear interior light does not illuminate.*1	No. 1 room light assembly	Click here
Rear interior light does not illuminate.*1	Harness or connector	-

*1: for TMMK Made (w/o Sliding Roof)

Vanity Light
Symptom	Suspected Area	See page
Vanity light does not illuminate.	Bulb	-
	Visor assembly (Vanity light switch)*1	Click here
	Visor assembly (Vanity light switch)*2	Click here
	Harness or connector	-

*1: for TMC, TMMR Made
*2: for TMMK Made

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

Courtesy Light
Symptom	Suspected Area	See page
Courtesy light LH does not illuminate.	Bulb	-
	Courtesy light assembly LH	Click here
	Front door courtesy switch circuit	Click here
	Instrument panel junction block assembly	Click here
	Harness or connector	-
Courtesy light RH does not illuminate.	Bulb	-
	Courtesy light assembly RH	Click here
	Front door courtesy switch circuit	Click here
	Harness or connector	-

Luggage Compartment Room Light
Symptom	Suspected Area	See page
Luggage compartment light does not illuminate.	Bulb	-
	No. 1 luggage compartment light assembly	Click here
	Luggage compartment door courtesy switch circuit	Click here
	Harness or connector	-
	Radio setting condenser*1	Click here
	Radio setting condenser*2
	Instrument panel junction block assembly	Click here
	Main body ECU (Multiplex network body ECU)	Click here

*1: for TMC, TMMR Made
*2: for TMMK Made

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