Question about Auto Start w/ aftermarket alarms

what shop are you installing this at?

BMWintoxication said:

what shop are you installing this at?

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a&b sound

The only thing i would see it's a problem with the alarm and it's autostart feature is the chip in the key. Dont' sue me if i'm wrong. But I believe that the car wouldnt start unless the chip in the key matches with the car or something to that extent. Now, if you want to install an autostart, you would have to get this one module where you would have to have it installed deep into your dash with one of your spare keys in it. So in a sense, you car will call for the key when you activate the autostart feature and it will "see" there's a matching key with the chip in it. I forgot what the module is called, but maybe some stereo/alarm installers can shed some light in this. I was thinking about putting this into effect in my car.

jaytee0401 said:

The only thing i would see it's a problem with the alarm and it's autostart feature is the chip in the key. Dont' sue me if i'm wrong. But I believe that the car wouldnt start unless the chip in the key matches with the car or something to that extent. Now, if you want to install an autostart, you would have to get this one module where you would have to have it installed deep into your dash with one of your spare keys in it. So in a sense, you car will call for the key when you activate the autostart feature and it will "see" there's a matching key with the chip in it. I forgot what the module is called, but maybe some stereo/alarm installers can shed some light in this. I was thinking about putting this into effect in my car.

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hmmm.. makes sense... would really like someone who has done this to help:eeps:

My friend who is an alarm/stereo installer did it. But remember, the key needs to be recharged or it'll die. The key you use to start your car now gets charged when you use it. I doubt that module where you put your spare key will charge the key. And you would really have to hide it good inside your dash.

G.T. E46 check PM

best buy did mine but i got a black widow and they screwed my ingntion switch up I had to have it replaced...

back then , a&b sounds try to install the compustar on my car for like 4 days, but guess what no luck...
so i would like to know if anyone can done this in vancouver..

I'll post the info on this in about a week.

k, check ur pm...

It's not impossible....and to avoid the dome light problem, all they have to do is diode isolate it from the alarm...simple fix really.

[email protected] said:

It's not impossible....and to avoid the dome light problem, all they have to do is diode isolate it from the alarm...simple fix really.

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serious?! what does diode isolate mean? sorry for the n00b questions~

When you put a diode in line with something, it means current can only flow one direction....so if he "diode isolates" the dome lights from the alarm, the dome light can't flow power back into the alarm....only the alarm TO the dome light.

[email protected] said:

When you put a diode in line with something, it means current can only flow one direction....so if he "diode isolates" the dome lights from the alarm, the dome light can't flow power back into the alarm....only the alarm TO the dome light.

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Thanks man!

I'm sure Ron can answer this much better than I can, but I don't think you need to worry about recharging a key or anythign for this. Essentially they pull the chip transponder from a spare key and mount it within the vicinity of the starter switch. The chip transponder should not need any power to "recharge" itself.

Ron - does having the transponder chip installed in the car make it inherently easier to steal? Now that you've basically given the chip to a potential thief, what prevents them from then just hotwiring / powering the ignition and starting the car?

Someone on another thread mentioned that the transponder chip doesn't work that way, and that it would only activate if given a specific signal from the alarm system itself. Is that right?

jaytee0401 said:

My friend who is an alarm/stereo installer did it. But remember, the key needs to be recharged or it'll die. The key you use to start your car now gets charged when you use it. I doubt that module where you put your spare key will charge the key. And you would really have to hide it good inside your dash.

Click to expand...

jaytee0401 said:

The only thing i would see it's a problem with the alarm and it's autostart feature is the chip in the key. Dont' sue me if i'm wrong. But I believe that the car wouldnt start unless the chip in the key matches with the car or something to that extent. Now, if you want to install an autostart, you would have to get this one module where you would have to have it installed deep into your dash with one of your spare keys in it. So in a sense, you car will call for the key when you activate the autostart feature and it will "see" there's a matching key with the chip in it. I forgot what the module is called, but maybe some stereo/alarm installers can shed some light in this. I was thinking about putting this into effect in my car.

Click to expand...

yes, you are correct.........to make the starter works, you have to buy a box=$35 to put the key with the chip in it and hide the box somewhere inside the car(that was what the installer told me).

Go check out www.autotoys.com

They have a lot of immobilizer bypass units on there. They also have a lot of support information on there, but for customers only. This site should give you some idea of what you need for your car.