LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE

Use the table below to help find the cause of the problem. The numbers indicate the priority of the likely cause of the problem. Check each part in order. If necessary, replace these parts.

ILLUMINATED ENTRY SYSTEM (w/ Illuminated Entry System)
Symptom	Suspected Area	See page
Illuminated entry system does not operate.	Wireless door lock control system	Click here
	DOME fuse	-
	Front door courtesy switch	Click here
	Rear door courtesy switch	Click here
	Back door courtesy switch	Click here
	Front door lock assembly LH (for LHD)	Click here
	Front door lock assembly RH (for RHD)	Click here
	Harness or connector	-
	Instrument panel junction block (Body ECU)	-

HEADLIGHT SYSTEM
Symptom	Suspected Area	See page
Both the headlights do not come on (Taillight is normal)	HEAD fuse	-
	HEAD relay	Click here
	Headlight dimmer switch	Click here
	Harness or connector	-
Both the headlights do not come on (Taillight does not come on either)	Headlight dimmer switch	Click here
	Harness or connector	-
Either side of the headlights does not come on	HEAD RH fuse or HEAD LH fuse	-
	Bulb	-
	Harness or connector	-
"Low beam" does not come on	Bulb	-
	Headlight dimmer switch	Click here
	Harness or connector	-
"Hi-beam" does not come on	Bulb	-
	Headlight dimmer switch	Click here
	Harness or connector	-
"Flash" does not come on	Headlight dimmer switch	Click here
"Flash" does not come on	Harness or connector	-

TAILLIGHT SYSTEM
Symptom	Suspected Area	See page
Both the taillights do not come on (Headlight is normal)	TAIL fuse, PANEL fuse	-
	Instrument panel junction block (Body ECU)	-
	Bulb	-
	Harness or connector	-
Both the taillights do not come on (Headlight does not come on either)	Headlight dimmer switch	Click here
	Harness or connector	-
Either side of the taillights does not come on	Bulb	-
Either side of the taillights does not come on	Harness or connector	-

FRONT FOG LIGHT SYSTEM (w/ Front Fog Light)
Symptom	Suspected Area	See page
Both the front fog lights do not come on with headlight dimmer switch in the TAIL or HEAD position	FR FOG fuse	-
	FR FOG relay	Click here
	Headlight dimmer switch	Click here
	Harness or connector	-
Either side of the front fog lights does not come on	Bulb	-
Either side of the front fog lights does not come on	Harness or connector	-

REAR FOG LIGHT SYSTEM (w/ Rear Fog Light)
Symptom	Suspected Area	See page
Both the rear fog lights do not come on with headlight dimmer switch in the TAIL or HEAD position	RR FOG fuse	-
	Headlight dimmer switch	Click here
	Rear fog light switch	Click here
	Harness or connector	-
Either side of the rear fog lights does not come on	Bulb	-
Either side of the rear fog lights does not come on	Harness or connector	-

BACK-UP LIGHT SYSTEM
Symptom	Suspected Area	See page
Both the back up lights do not come on	Back up light switch (for Manual Transmission)	Click here
	Park/neutral position switch (for A340E Automatic Transmission)	Click here
	Park/neutral position switch (A343E Automatic Transmission)	Click here
	Harness or connector	-
Either side of the back up lights does not come on	Bulb	-
Either side of the back up lights does not come on	Harness or connector	-

STOP LIGHT SYSTEM
Symptom	Suspected Area	See page
Both the stop lights do not come on	STOP fuse	-
	Stop light switch	Click here
	Harness or connector	-
Either side of the stop lights does not come on	Bulb	-
Either side of the stop lights does not come on	Harness or connector	-

HIGH MOUNTED STOP LIGHT SYSTEM
Symptom	Suspected Area	See page
High mounted stop light does not come on (Other stop lights are normal)	High mounted stop light	-
	Harness or connector	-

TURN SIGNAL LIGHT SYSTEM
Symptom	Suspected Area	See page
Both the turn signal lights do not come on	HAZ-HORN fuse	-
	Turn signal flasher	-
	Headlight dimmer switch	Click here
	Harness or connector	-
Either side of the signal lights does not come on	Bulb	-
Either side of the signal lights does not come on	Harness or connector	-

HAZARD WARNING SIGNAL LIGHT SYSTEM
Symptom	Suspected Area	See page
Hazard warning signal light system does not operate (Turn signal light system is normal)	Hazard warning switch	Click here
	Turn signal flasher	-
	Harness or connector	-

IGNITION KEY CYLINDER LIGHT SYSTEM (w/ Ignition Key Cylinder Light)
Symptom	Suspected Area	See page
Ignition key cylinder light does not come on (Personal light or front room light is normal)	Ignition key cylinder light	Click here
	Harness or connector	-

PERSONAL LIGHT SYSTEM (w/ Personal Light Assembly)
Symptom	Suspected Area	See page
Personal light does not come on	DOME fuse	-
	Bulb	-
	Personal light assembly	Click here
	Front door courtesy switch	Click here
	Harness or connector	-

FRONT ROOM LIGHT SYSTEM (w/o Personal Light Assembly)
Symptom	Suspected Area	See page
Front room light does not come on	DOME fuse	-
	Bulb	-
	Front room light assembly	Click here
	Front door courtesy switch	Click here
	Harness or connector	-

CENTER ROOM LIGHT SYSTEM
Symptom	Suspected Area	See page
Center room light does not come on (Personal light or front room light is normal)	Bulb	-
	Center room light assembly	Click here
	Rear door courtesy switch	Click here
	Back door courtesy switch	Click here
	Room light switch (w/o Personal Light Assembly)	-
	Harness or connector	-

REAR ROOM LIGHT SYSTEM (for Super Long)
Symptom	Suspected Area	See page
Rear room light does not come on (Personal light or front room light is normal)	Bulb	-
	Rear room light assembly	Click here
	Rear door courtesy switch	Click here
	Back door courtesy switch	Click here
	Room light switch (w/o Personal Light Assembly)	-

STEP LIGHT SYSTEM
Symptom	Suspected Area	See page
Step light does not come on (Personal light or front room light is normal)	Bulb	-
	Step light assembly	Click here
	Harness or connector	-

AUTOMATIC LIGHT CONTROL SYSTEM (w/ Automatic Light Control System)
Symptom	Suspected Area	See page
Automatic light control system does not operate	Automatic light control sensor	Click here
	Instrument panel junction block (Body ECU)	-
	Harness or connector	-

LIGHT AUTO TURN OFF SYSTEM (w/ Automatic Light Control System)
Symptom	Suspected Area	See page
Light auto turn off system does not operate (Other lighting systems are normal)	Instrument panel junction block (Body ECU)	-

MANUAL LEVELING SYSTEM (w/ Headlight Leveling System)
Symptom	Suspected Area	See page
Manual leveling system does not operate	Headlight leveling switch	Click here
	Headlight assembly	Click here
	Harness or connector	-