good question.....we has been experience before.it will be depend to the installer how there do it. but the correct way is arm the alarm then the engine still running after just switch off by the timer.
Sifu's out there...help needed...my ECU always hangs and the car can't start. The "check engine" will go off but the "turbine" spool indicator will cont to light up then the car can't start. Already 2 times in 3...