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
Pre-crash safety system (all functions) does not operate	Power source circuit	Click here
	Buckle switch circuit	Click here
	Seat belt control ECU	Click here
Only pre-crash brake does not operate	Satellite switch circuit	Click here
Only pre-crash brake does not operate	Skid control ECU	Click here
System operates when the possibility of collision does not exist	Millimeter wave radar sensor	Click here
	Distance control ECU	Click here
System does not operate when the possibility of collision exists	Millimeter wave radar sensor	Click here
	Check if inoperative conditions of the system are met	Click here
	Distance control ECU	Click here
Neither normal system code nor DTC is output	Power source circuit	Click here
System does not operate normally even when normal system code is output and DTCs are not output	Power source circuit	Click here