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You can't just disconnect the anti-theft system ! . If the modules on the vehicle don't receive a coded response form the anti-theft system the vehicle will not work , no start ! This coded response is send on the class 2 serial data communication bus to the PCM - engine computer , if it doesn't see it the fuel system , fuel injectors won't be turned on ! an in some cases the engine won't even crank over !
I have read of a way to by pass the system ! If you google GM vats an pass key by pass , you will see how to do it . Don't know if this works or not ! Haven't tried it !
Hi. To stop this you need to power up the car and activate the ignition. If the battery voltage gets too low when the alarm is armered then the alarm thinks you have disconnected the battery in a theft attempt and the siren activates. The easiest repair is to repalce the battery or repair any currnet draw issues.
Security light lit on the instrument cluster ? It should have anti-theft system . No , can't just remove it . It has componets - key lock cylinder housing , software programmed into control modules etc... If you just removed or disconnected the pass lock sensor the pcm -engine computer would not see a coded message ,so it would disable fuel injectors an maybe starter . Your best bet ,have a qualified repair shop diagnose it .
I looked at your security system, it is starter motor disable and fuel injectors. You can usually get the starter crank, but, if it is the security system, it still won't start because of fuel injectors. I don't know any way to bypass security system. You can check for applicable trouble codes, if there are any?
hey, i ha d the same problem, turn the key on and let the anti theft light blink till it stops blinking about ten min. then start the car the computer has to re-learn. the pass-key anti theft shuts down the fuel pump and ignition . after i did this i have not had a problem since, i hope this helps
if the vehicle starts then stops and the anti-theft light is flahing you may need to re-set the pass-key system to do this you will need to atempt to start the vehicle and when it stalls leave the key in that position and watch the anti-theft light. it should flash on and off for about 5 to 10 minutes. when it stops flahing turn the ignition to off then try to restart your vehicle
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