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 think we could share something here regarding steering rack problem.I am wondering here my fren car is crackling when she steer left and right hardly.this simptom oso happen when she hit potholes,uneven...
Like last time when i had the 1.6 engine
i always go to my mech
he plugs in his ECU thing and does the setting
then he will say "woah you was running very high fuel"
then he will say he tune for my already and reset...