I found a website which lists the resistance values of the chips according to the key #... you can find out the key #'s by going to a dealership... give them your key and ask which key # it is

ray
http://www.franken.de/users/dagobah/luke/vats.html

 

or ya could just take a volt meter adn get the resistance that way and match it up with the key number

 

I was just trying to make some peoples life a little easier!

 

Ray,

Thank you for the information. You may be "blasted" about "aiding" some less-than-scrupulous people in their efforts to steal. Even though this is public information, some will say "don't make it easy..."

Two reasons off the top of my head why some honest people may want to know are:

1. There is no access to an ohmmeter or the key has been lost, both cases making a measurement impossible. With this information, they only have to get enough resistors to obtain the 15 resistance values and try a maximum of 15 times (and endure the associated delay which would occur with each wrong value). Since the values in the table are not standard resistance values (and I don't know how much tolerance the input to the VATS is), you'd have to use a combination of parallel/series connected resistors to get the exact value as one way to get the exact value (there are several other ways to do this with one resistor).

2. Or, you do have access to an ohmmeter, but you're not sure of the exact resistance needed (especially true with some analog meters or an inaccurate meter, etc...). Using the chart will easily narrow down the correct value.

 

The Vats system allows for a variation of .02k resistance..Only reason i know is from installing remote car starters...

 

Thanks!

For those that don't know, 0.02K = 20, or a variation of ±10 ohms. Although this figure does not compensate for the different figures - ±10 ohms (20 ohm tolerance) at 392 ohms equates to ~5% and ±10 ohms at 11.8K ohms equates to 0.169%!

Because this range is between about 0.2% and 5%, I'd guess the actual tolerance is something close to the middle of those two figures, or 1-2%.

Resistors are rarely exactly what their value says they are, and are commonly sold in tolerances of 0.1% to 10%.

Resistance will change due to temperature, making a match to the specified value as close as possible important.

Because of the differences in acutal resistance values, it is best to measure the final resistance with an accurate ohmmeter, or lacking that, use 1% metal film resistors which cost ~10¢ each (0.1% are ~$1.00 each).

Using a 1% resistor at 1K will allow for a resistance of 995-1005 ohms (1% of 1K = 10, or ±10 ohms).

Adding resistors (series or parallel) will require that you also add the tolerances. My experience is that metal film resistors are much closer to their declared ratings than the 1% allows for tolerance...

[This message has been edited by Stuart Moss (edited June 30, 2001).]

 

If I had not found this website then I would not have known the EXACT resistance of the pellet... This is because I have a small 17$ analog multimeter... which is not going to give me a prescise reading... I posted this for people who have the same problem... and may I make a coment please about helping car theives... I do not think most people go onto the internet looking for ways to steal camaro's... either you know how, or you are tought how. This is a forum used to help people, and no matter how boarderline the material posted, if this helps someone then the board served it's purpose. If someone really wanted to steal a camaro that badly, reguardless of weather they find it on this board, they are going to find it... besides it would be easier to use a variable resistor anyhow *snicker*

 

Stuart,

Actually, a 1% 1K resistor may range from 990 to 1010 ohms, since the % tolerance denotes +/- deviation from the specified value.

------------------
Tim

1992 Z28, 305 TPI 5 speed, 12.1 sec @ 114.7 mph

1984 Berlinetta 305 TPI Auto, 13.8 sec @ 99.7 mph

 

Ouch!

Right you are.

 

I hope all you guys who think publicly posting VATs values get to experience the feeling of walking out to an empty parking space where you know your baby was, hopefully you loose a few hundred dollars in tools, CDs and personal items in the process. I've done it twice already so i know where i stand on this issue.

You see, you never believe it will happen to you until it does. And then you really don't expect it the second time.

 

If i'm the kinda person that steals cars i know this already...it took my 5 min to call chevy and for them to give me all the resistor values..any thief can do that....If my car is stolen the insurance company will buy a new one for me...a smart thing would be to buy an alarm like most people...you act as if we gave away the recipe the secret sauce...ou still have to be smart enough to get a resistor and tie it in to the ignition..if you can do that you can get resistor values

 

all I know is if someone wanted to steal a camaro bad enough and didn't get the information form here... then they would get it elsewhere easily... this is not the first place I would look to get information to steal a car.. a dealership would be, trust me I tried there when this problem started and they said they would tell me but they couldn't.. it was against that dealerships policy, and told me they could only give me key codes... but the then directed me to a lock smith who would give me them... I posted this to help people not to cuase a problem...

 

Its certainly not classified info..any stereo shop is gonna have that info for remote car starters,mechanics for repairs,,the info is out there....find something else to complain about..we're all sorry you cars got stolen but i assure you this forum will not cause someone to steal a car they werent going to from the beginning