LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE

Note

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.*

*: w/ Smart Entry and Start System

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.

Personal Light
Symptom	Suspected Area	Link
Personal light LH does not illuminate	Bulb	-
	Map light assembly	Click here
	Harness or connector	-
Personal light RH does not illuminate	Bulb	-
	Map light assembly	Click here
	Harness or connector	-

Spot Light (for Front Side)
Symptom	Suspected Area	Link
Spot light LH does not illuminate	Bulb	-
	Spot light assembly	Click here
	Harness or connector	-
Spot light RH does not illuminate	Bulb	-
	Spot light assembly	Click here
	Harness or connector	-

Spot Light (for Rear Side)
Symptom	Suspected Area	Link
Spot light LH does not illuminate	Bulb	-
	Spot light assembly	Click here
	Harness or connector	-
Spot light RH does not illuminate	Bulb	-
	Spot light assembly	Click here
	Harness or connector	-

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

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

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 Light
Symptom	Suspected Area	Link
Luggage compartment light does not illuminate	Bulb	-
	No. 1 room light assembly	Click here
	Back door courtesy switch circuit	Click here
	Harness or connector	-
	Main body ECU (Multiplex network body ECU)	Click here

Ambient Light (for Front Door) (w/ Ambient Light)
Symptom	Suspected Area	Link
Front door ambient light LH does not illuminate	Front door trim board sub-assembly LH	Click here
Front door ambient light LH does not illuminate	Harness or connector	-
Front door ambient light RH does not illuminate	Front door trim board sub-assembly RH	Click here
Front door ambient light RH does not illuminate	Harness or connector	-

Ambient Light (for Rear Door) (w/ Ambient Light)
Symptom	Suspected Area	Link
Rear door ambient light LH does not illuminate	Rear door trim board sub-assembly LH	Click here
Rear door ambient light LH does not illuminate	Harness or connector	-
Rear door ambient light RH does not illuminate	Rear door trim board sub-assembly RH	Click here
Rear door ambient light RH does not illuminate	Harness or connector	-

Ambient Light (for Instrument Panel) (w/ Ambient Light)
Symptom	Suspected Area	Link
Instrument panel ambient light (Driver Side) does not illuminate	No. 1 interior illumination light assembly (Driver Side)	Click here
	Harness or connector	-
Instrument panel ambient light (Passenger Side) does not illuminate	No. 1 interior illumination light assembly (Passenger Side)	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
Interior light control does not operate normally	Interior light circuit	Click here
	Front door courtesy switch circuit	Click here
	Rear door courtesy switch circuit	Click here
	Back door courtesy switch circuit	Click here
	Door unlock detection switch circuit	Click here
	IG signal circuit	Click here
	ACC signal circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Ignition key cylinder light does not illuminate*2	Interior light circuit	Click here
Ignition key cylinder light does not illuminate*2	Main body ECU (Multiplex network body ECU)	Click here
Engine switch illumination does not illuminate*1	Engine switch illumination circuit	Click here
Engine switch illumination does not illuminate*1	Certification ECU (Smart key ECU assembly)	-

*1: w/ Smart Entry and Start System
*2: w/o Smart Entry and Start System

Illuminated Entry System (Ambient Light Control) (w/ Ambient Light)
Symptom	Suspected Area	Link
Ambient light control does not operate normally (All ambient lights do not come on)	Front door courtesy switch circuit	Click here
	Rear door courtesy switch circuit	Click here
	Back door courtesy switch circuit	Click here
	Door unlock detection switch circuit	Click here
	Ambient light circuit	Click here
	Main body ECU (Multiplex network body ECU)	Click here
Ambient illumination light dimmer control does not operate	Ambient light circuit	Click here
Ambient illumination light dimmer control does not operate	Main body ECU (Multiplex network body ECU)	Click here

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