LIGHTING SYSTEM PROBLEM SYMPTOMS TABLE

Tip:

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.

Table 1. Headlight System (for Halogen Headlight)
Symptom	Suspected Area	Link
Low beam headlight on one side does not illuminate.	H-LP LH-LO fuse or H-LP RH-LO fuse	-
	Harness or connector	-
	Headlight bulb	Click here
Both left and right low beam headlights do not illuminate.	Headlight dimmer switch circuit	Click here Click here
	Headlight relay 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
High beam flash function does not operate.	Headlight dimmer switch circuit	Click here Click here
	Main body ECU (Multiplex network body ECU) (for LHD)	Click here
	Main body ECU (Multiplex network body ECU) (for RHD)	Click here
High beam headlight on one side does not illuminate.	H-LP LH-HI fuse or H-LP RH-HI fuse	-
	Headlight bulb	Click here
	Harness or connector	-
Both left and right high beam headlights do not illuminate.	Headlight dimmer switch circuit	Click here Click here
	Headlight (High beam) 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
Parking lights do not illuminate.	Harness or connector	-
Parking lights do not illuminate.	Parking light bulb	Click here

Table 2. Headlight System (for LED Headlight)
Symptom	Suspected Area	Link
Low beam headlight on one side does not illuminate.	H-LP LH-LO fuse or H-LP RH-LO fuse	-
Low beam headlight on one side does not illuminate.	Harness or connector	-
Both left and right low beam headlights do not illuminate.	Headlight dimmer switch circuit	Click here Click here
	Headlight relay 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
High beam flash function does not operate.	Headlight dimmer switch circuit	Click here Click here
	Main body ECU (Multiplex network body ECU) (for LHD)	Click here
	Main body ECU (Multiplex network body ECU) (for RHD)	Click here
High beam headlight on one side does not illuminate.	H-LP LH-HI fuse or H-LP RH-HI fuse	-
	Headlight unit	Click here
	Harness or connector	-
Both left and right high beam headlights do not illuminate.	Headlight dimmer switch circuit	Click here Click here
	Headlight (High beam) 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
Parking lights do not illuminate.	Harness or connector	-
Parking lights do not illuminate.	Headlight unit	Click here

Table 3. Front Fog Light System (w/ Front Fog Light)
Symptom	Suspected Area	Link
Front fog light does not illuminate (taillight is normal).	FOG FR fuse	-
	Front fog light bulb	Click here
	Headlight dimmer switch circuit	Click here Click here
	Front fog light 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

Table 4. Rear Fog Light System (w/ Rear Fog Light)
Symptom	Suspected Area	Link
Rear fog light does not illuminate (taillight is normal).	FOG RR fuse	-
	Headlight dimmer switch circuit	Click here Click here
	Rear fog light circuit	Click here
	Harness or connector	-
	Rear fog light lens and wire	Click here
	Main body ECU (Multiplex network body ECU) (for LHD)	Click here
	Main body ECU (Multiplex network body ECU) (for RHD)	Click here

Table 5. License Plate Light System
Symptom	Suspected Area	Link
License plate light does not illuminate.	License plate light bulb	Click here
	License plate light assembly	Click here
	Harness or connector	-

Table 6. Taillight System
Symptom	Suspected Area	Link
Taillight does not illuminate (rear combination light).	Rear light socket and wire	Click here
Taillight does not illuminate (rear combination light).	Harness or connector	-
Taillight does not illuminate (rear light).	Rear light assembly	Click here
Taillight does not illuminate (rear light).	Harness or connector	-
All lights do not illuminate	Headlight dimmer switch circuit	Click here Click here
	Taillight relay 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

Table 7. Stop Light System
Symptom	Suspected Area	Link
Stop light on one side does not illuminate.	Stop light bulb	Click here
	Rear combination light socket and wire sub-assembly	Click here
	Harness or connector	-
Center stop light does not illuminate.	Center stop light assembly	Click here
Center stop light does not illuminate.	Harness or connector	-
All light do not operate.	STOP fuse	-
	Stop light switch assembly	Click here
	Harness or connector	-

Table 8. Back-up Light System
Symptom	Suspected Area	Link
Back-up light on one side does not illuminate.	Back-up light bulb	Click here
	Rear fog light lens and wire	Click here
	Harness or connector	-
Both left and right back-up lights do not illuminate.	GAUGE fuse	-
	Park/neutral position switch assembly (for U660F Automatic Transaxle)	Click here
	Park/neutral position switch assembly (for U760E Automatic Transaxle)	Click here
	Park/neutral position switch assembly (for U760F Automatic Transaxle)	Click here
	Park/neutral position switch assembly (for K111 CVT)	Click here
	Park/neutral position switch assembly (for K111F CVT)	Click here
	Back-up light switch assembly (for EA64 Manual Transaxle)	Click here
	Back-up light switch assembly (for EA64F Manual Transaxle)	Click here
	Back-up light switch assembly (for EB61 Manual Transaxle)	Click here
	Back-up light switch assembly (for EB61F Manual Transaxle)	Click here
	Back-up light switch assembly (for EB63F Manual Transaxle)	Click here
	Harness or connector	-

Table 9. Turn Signal Light System
Symptom	Suspected Area	Link
No turn signal lights operate.	Turn signal switch circuit	Click here
	Harness or connector	-
	Combination meter assembly	Click here
One of the turn signal lights does not operate.	Meter/gauge system	Click here

Table 10. Hazard Warning Light System
Symptom	Suspected Area	Link
Hazard warning lights do not operate (turn signal lights are normal).	TURN&HAZ fuse	-
	Hazard warning switch circuit	Click here
	Combination meter assembly	Click here
	Harness or connector	-
Emergency brake signal (hazard warning light blink) does not operate (w/ Emergency Brake Signal)	CAN communication system (for LHD with Central Gateway ECU)	Click here
	CAN communication system (for LHD without Central Gateway ECU)	Click here
	CAN communication system (for RHD with Central Gateway ECU)	Click here
	CAN communication system (for RHD without Central Gateway ECU)	Click here
	Vehicle stability control system	Click here
	Combination meter assembly	Click here

Table 11. Automatic Light Control System (w/ Automatic Light Control System)
Symptom	Suspected Area	Link
Automatic light control system does not operate.	Headlight dimmer switch circuit	Click here Click here
	IG signal circuit	Click here
	Automatic light control sensor	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

Table 12. Light Auto Turn-off System
Symptom	Suspected Area	Link
Light auto turn-off system does not operate.	Headlight dimmer switch circuit	Click here Click here
	Door courtesy switch circuit	Click here
	IG 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

Table 13. Daytime Running Light System (w/ Daytime Running Light)
Symptom	Suspected Area	Link
Daytime running light does not operate.	CAN communication system (for LHD with Central Gateway ECU)	Click here
	CAN communication system (for LHD without Central Gateway ECU)	Click here
	CAN communication system (for RHD with Central Gateway ECU)	Click here
	CAN communication system (for RHD without Central Gateway ECU)	Click here
	Headlight dimmer switch circuit	Click here Click here
	Parking brake switch circuit	Click here
	DRL relay circuit	Click here
	Harness or connector	-
	Headlight unit (for LED Headlight)	Click here
	Headlight unit (for Halogen Headlight)	Click here
	Main body ECU (Multiplex network body ECU) (for LHD)	Click here
	Main body ECU (Multiplex network body ECU) (for RHD)	Click here