LANE-KEEPING ASSIST SYSTEM

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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Table 1. Lane-keeping assist system
Symptom	Suspected Area	See page
Lane-keeping assist system does not operate	Main switch circuit	Click here
	Object recognition camera	Click here
	Object recognition ECU	Click here
	Harness or connector	-
	Driving support ECU	Click here
LKA indicator light abnormal (Does not turn on)	Indicator light circuit	Click here
	Main switch circuit	Click here
	No. 1 meter ECU sub-assembly	Click here
	Driving support ECU	Click here
LKA indicator light abnormal (Remains on)	Indicator light circuit	Click here
	Main switch circuit	Click here
	No. 1 meter ECU sub-assembly	Click here
	Driving support ECU	Click here
Lane-keeping assist system is not canceled even when turn signal light switch is operated.	Turn signal light switch	Click here
	Harness or connector	-
	Driving support ECU	Click here
Lane-keeping assist system is not canceled even when windshield wiper switch is operated (Lo or Hi)	Windshield wiper switch	Click here
	Harness or connector	-
	Driving support ECU	Click here
Increase in cases that driver can see line marker but system cannot detect lane markers	Windshield glass is dirty	-
	Object recognition camera is dirty	-
	Adjust object recognition camera	Click here
	Driving support ECU	Click here
Lane-keeping assist system is operating, but no operation condition is displayed on multi-information display in combination meter	No. 1 meter ECU sub-assembly	Click here
	Driving support ECU	Click here
Buzzer does not sound even when lane markers are lost during lane departure warning function	Skid control buzzer	Click here
	Skid control ECU (for LHD)	Click here
	Skid control ECU (for RHD)	Click here
	Driving support ECU	Click here
Lane-keeping assist system cannot detect line marker during nighttime	Headlight assembly (for HID)	Click here
	Headlight assembly (for LED)	Click here
	Multiplex network front light ECU (Front controller)	-
	Driving support ECU	Click here

LANE-KEEPING ASSIST SYSTEM PROBLEM SYMPTOMS TABLE