GM electronic keys

[Craig Pugsley]

> Subject: Re: GM ignition key readers
> 
> Craig,
> 
>           Just resistors. There are 15 possibilities and they range from
> 400 ohms to almost 12K ohms.
> > A quick question.. (not really efi, but still on car electronics).
> > Do the GM car keys with electronics inside them that the ECU talks to
> > still just use resistors inside the key or have they changed to something
> > more secure (ie something electronic in the key)?
> > If so, when did they change?
>
>    What spurs your interest on the VAT system?

My car (1995 Holden commodore (australia) w/ derivitive of buick 3.8v6 and GM p4
ecu) has this feature installed and I was wondering what I had to do to
make a spare key for it, as the factory key has a whopping great remote
entry transmitter as part of it (like 1.5 inches wide x 2 inches long).
I read somewhere that the security system used rolling codes, so if the
VATS is a resistor only then the rolling codes must be in the UHF
transmitter. I didn't want to go fooling around with the system in case
it was something that might be damaged easily.
So rest easy.. it's a legitimate question for a legitimite reason!

Cheers,
Craig. 
> 
> 
>       rt
> 
> ------------------------------
> 
> From: Andris Skulte <askulte at emerald.tufts.edu>
> Date: Thu, 06 Nov 1997 19:15:07 -0500
> Subject: Re: Knock Detection
> 
> > I do have a zipped copy of a TI publication called "Engine Knock Detection
> > Using Spectral Analysis Techniques with a TMS-320 DSP" that  I'll send
> > to anyone that wants it --
> 
> I'd love to have it. Thanks Tom :)
> - -- 
> ********************Skulte Performance Designs************************
> Andris Skulte   askulte at tufts.edu   http://www.eecs.tufts.edu/~askulte
> (617)627-1601   89 IROC M5 305 TPI  best ET:13.516  best MPH:104.1
>  
> Leave late, drive faster, still get there first. ;)
> 
> ------------------------------
> 
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