My M80 was supplied n fitted by Chris Rogers. How it works:
When I park, I remove the keys, turbo timer starts to countdown, motor still running..shut the door, press the arm button, it locks all doors while the TT is timing down...as soon as the car shuts down...after about 10secs...another chirp signifies the car is now armed. That, I believe is how it should work...
Send Chris a PM, he should be able to tell u wats wrong.