Anti- thief system keeps car from starting.

You can't bypass the anti-theft system. It is computer controlled and there to stop exactly what you are trying to do if you are trying to work a way around it..

If you just went out to the vehicle and you can't get in, or you put the keys in and the Security Light is flashing and won't let you start the car, there are re-learn procedures. This usually involves turning the key to the position before start, (dash warning lights on) and waiting for a chime or a light to flash (5 minutes), then you turn off and do the same again. You do it a third time and there is a chime and the Security Light goes off. A thief doesn't have 15 minutes to sit in the vehicle and wait.

Or

you need an auto-electrician to reprogram it.

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BMW EWS II security bypass on 1995 M3 by froggy - YouTube

? 17:46
https://www.youtube.com/watch?v=lGhaDwDddf4
Jun 28, 2012 - Uploaded by froggy
I show how to bypass the EWS II security system on a 1995 BMW ... froggy 3 months ago .... not ,what i can .

Security light. The logic, of the computer, thought the car had been stolen. You did the correct thing, using the remote. Very well done. Now, to find out why the light was on. A lot of vehicles will sense a loss of electrical power and then the computer sees the power come back. This triggers the anti theft system to prevent a thief from starting the car. Using the remote, resets this. Now, have your battery cables cleaned. Obviously there is an issue when cranking the car, that is causing a low voltage issue. Hope this helps.

Check how old the battery is & test it or replace,as necessary

Test Alternator Output especially A/C Current Ripple

Look at ALL Data with professional scan tool on a road test
& record things

Look at freeze frame data when problem occurs

your anti-theft system has a short circuit in it;
the truck starts ok then arms it's self while you are driving and, thinking you are a car thief activates have the anti-theft wiring fixed by an auto electrician

If you mean the anti-theft PASS system, it does not work that way.
You have to have power to the module, and it has to get the right signal from the key chip to start the engine.
Otherwise a car thief could start the car.

If you are dealing with the anti theft the anti theft will flash as you are trying to start the vehicle if this is the case then it is the anti theft if not then you are not dealing with a ant theft issue. You can do a 30 minute relearn procedure without a scan tool. here is how Turn ignition on without the engine reunning.attempt to start the vehicle then release the key to ON.(vehicle doest start) Observe the security light.afeter 10 minutes the security light will turn off.Turn off the ignition and wait 5 seconds.do this 3 times for 30 minutes. start the engine with the engine started the vehicle will learn the passlock key.

It could be your anti-thief system. Try turning your key to the on position but don't try to start the car. Leave it in the on position for 10 min. Your security light on the dash should stay on throught the process but will go out after the 10 mins. When you see it go off turn your key back off then start your car. If it starts, you just reset your anti-thief system. There are ways to bypass this system. I don't remember the web sights. Good luck.