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.
i just bought a used type s bov($450) and installed yesterday.. somehow i doen't ike the sound..
just wondering if someone would like to change their bov with my this type s (no ssqv pls - as i used it...