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
"CHECK PCS SYSTEM" is displayed	Driving support ECU	Click here
"PCS TEMPORARILY NOT AVAILABLE" is displayed	System determines 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 protection fail-safe of seat belt control ECU operates. If ECU temperature drops, normal control returns.	-
	Millimeter wave radar sensor	Click here
	Seat belt control ECU	Click here
	Driving support ECU	Click here
Although there is possibility of collision, pre-crash control (all front collision controls) do 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	Click here
Although there is no possibility of collision, pre-crash control (all front collision controls) operates	Check millimeter wave radar sensor	Click here
	Perform millimeter wave radar sensor adjustment	Click here
	Millimeter wave radar sensor	Click here
	Driving support ECU	Click here
Neither normal system code nor DTC is output	Power source circuit	Click here
Neither normal system code nor DTC is output	Seat belt control ECU	Click here
System does not operate normally even when normal system code is output and DTCs are not output	Power source circuit	Click here
	Seat belt control ECU	Click here
Pre-crash brake cannot be canceled	Pre-crash brake cancel switch	Click here
	Pre-crash safety brake cancel switch circuit	Click here
	Driving support ECU	Click here
	Skid control ECU assembly	Click here
Only pre-crash seat belt does not operate	Buckle switch error (malfunction in which DTC is not output)	-
Only pre-crash seat belt does not operate	Seat belt control ECU	Click here