PRE-CRASH SAFETY 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.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Pre-crash Safety System
Symptom	Suspected Area	See page
"CHECK PCS SYSTEM" is displayed	Combination meter	Click here
	Driving support ECU (for LHD)	Click here
	Driving support ECU (for RHD)	Click here
	Lane recognition camera sensor	Click here
"PCS TEMPORARILY NOT AVAILABLE" is displayed	System determines obstacles cannot be detected due to millimeter wave radar sensor or radiator grille being dirty. If dirt is removed, normal control returns (dirt history can be checked using Data List).	-
	System determines millimeter wave radar sensor cannot detect obstacles due to bad weather. If weather recovers, normal control returns (bad weather history can be checked using Data List).	-
	Overheating prevention function of seat belt control ECU or millimerer wave radar sensor operates. If ECU temperature drops, normal control returns.	-
	Pre-crash brake cancel switch circuit	Click here
	Millimeter wave radar sensor	Click here
	Seat belt control ECU (for LHD)	Click here
	Seat belt control ECU (for RHD)	Click here
	Driving support ECU (for LHD)	Click here
	Driving support ECU (for RHD)	Click here
Although there is possibility of collision, pre-crash control (all front collision controls) does not operate ("PCS TEMPORARILY NOT AVAILABLE" is not displayed)	Vehicle condition/environment does not match pre-crash control operation conditions (confirm control operation conditions)	-
	Check installation condition of millimeter wave radar sensor	Click here
	Perform millimeter wave radar sensor adjustment	Click here
	Millimeter wave radar sensor	Click here
	Driving support ECU (for LHD)	Click here
	Driving support ECU (for RHD)	Click here
Although there is no possibility of collision, pre-crash control (all front collision controls) operates	Vehicle condition/environment does not match pre-crash control operation conditions (confirm control operation conditions)	-
	Check millimeter wave radar sensor	-
	Perform millimeter wave radar sensor adjustment	Click here
	Millimeter wave radar sensor	Click here
	Driving support ECU (for LHD)	Click here
	Driving support ECU (for RHD)	Click here
Only pre-crash seat belt does not operate	Buckle switch error (malfunction in which DTC is not output)	-
	Seat belt control ECU (for LHD)	Click here
	Seat belt control ECU (for RHD)	Click here
	Combination meter (check if indicator blinks using Active Test)	Click here
Pre-crash brake cannot be canceled (pre-crash safety warning indicator does not illuminates)	Pre-crash brake cancel switch circuit	Click here
	Driving support ECU (for LHD)	Click here
	Driving support ECU (for RHD)	Click here