I have it, but I'm not sure what it's called. I think it was called a tri-lock system. All of the local dealers put them on the new cars sold here. That's because we're so close to Mexico...one hour by road, 16 miles as the crow flies. The dealership here factors in the cost, a hefty $800, into the cost of the vehicle. It's not until you get into the financing dept that you find that out.
It's a type of theft deterrent device. This is how it works...You turn the ignition on, but not to the point it starts. You wait for the two chirps, and start it. You have three seconds to start it, or it won't start. If you wait too long or it doesn't start, you have to reset it. You do that by turning the ignition completely off. You then wait a couple of seconds for a single chirp. You can then start the process over.
Basically, the car will only start in that three second window after the two chirps. I'm not sure about all of the electronics behind it, but in theory, it keeps people from being able to hotwire the car. I guess you could somehow bypass this system or remove it. The other alternative is to learn how to hotwire a car in under three seconds.
It's a real pain in the ass when you're in a hurry or have been driving a car that doens't have it. One good thing is that if the car stalls, it will immediately start back up without having to reset it. I guess that was a safety issue in the early development. Imagine stalling in a intersection and having to turn it off, wait for a chirp, turn it back on, wait for two chirps, and then start the car. By that time you've already been t-boned by someone.