Initial Check
The driving support ECU performs an initial check on the system for approximately 3 seconds after the engine switch has been turned on (IG).
Monitor Function
After completing the initial check, the pre-crash safety becomes ready to operate. During this time, the driving support ECU periodically monitors the system for any malfunctions.
Diagnostic Trouble Code (DTC)
If the driving support ECU detects a malfunction in the pre-crash safety, it stores a 5 digit Diagnostic Trouble Code (DTC) in memory.