Fob Question
Thread Starter
Racer
Joined: Feb 2008
Posts: 435
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From: Lake Orion Michigan
Fob Question
I have a 98 Passave FOB with Key. GM 10253839
Is the Key of any value in the sale of this unit or is it specific to a car.
Is the Key of any value in the sale of this unit or is it specific to a car.
Last edited by O4-/-C5; Apr 16, 2008 at 10:45 PM.
Safety Car
Joined: Jul 2005
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From: Omaha Nebraska
St. Jude Donor '06
Is it a key blank with a chip or just a key blank and no chip?
Night Owl for life
Joined: Nov 2003
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From: Bugs Bunny should'a made a left turn here
the pellet on the key has a designated resistance value and i believe there are a total of 16 different values.
the key would have a 1 in 16 chance of working with another car if it was cut for that car.
the key would have a 1 in 16 chance of working with another car if it was cut for that car.
Safety Car
Joined: Jul 2007
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From: Louisville Kentucky
Exactly. If the key has already been cut, it is worthless for the most part to anyone else.
Thread Starter
Racer
Joined: Feb 2008
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From: Lake Orion Michigan
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Race Director
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From: Norman Oklahoma - The Only State in the Union with no Blue Counties!
I have a FOB that I "Lost" for a while, then it was "found" but doesn't work anymore. Not trying to steal the thread, but can someone help?
Thread Starter
Racer
Joined: Feb 2008
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From: Lake Orion Michigan
Burning Brakes
Joined: May 2006
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From: Houston TEXAS
The FOB will work on any 97-99 after programming. Let me know if you need instructions for programming. The chip in the key has 1 of 16 different levels of resistance which can be measured if you have a digital ohm meter. If the key has been cut, it is, for the most part, usless to anyone else. If it's still a blank its worth about $10 if you can find the chips resistance. streekeys.com sells keys with chip programmed for $10 so it's probably not worth your trouble. 
Safety Car
Joined: Jul 2005
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From: Omaha Nebraska
St. Jude Donor '06
Thread Starter
Racer
Joined: Feb 2008
Posts: 435
Likes: 3
From: Lake Orion Michigan
The FOB will work on any 97-99 after programming. Let me know if you need instructions for programming. The chip in the key has 1 of 16 different levels of resistance which can be measured if you have a digital ohm meter. If the key has been cut, it is, for the most part, usless to anyone else. If it's still a blank its worth about $10 if you can find the chips resistance. streekeys.com sells keys with chip programmed for $10 so it's probably not worth your trouble.
Tech Contributor
Joined: Dec 2003
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From: Horncastle Lincolnshire, England
2023 C5 of the Year Finalist - Unmodified
Here are the VATS values
The resistance of the key matches the programmed setting for your car. The BCM senses the resistance and if it's within 10%, the car starts.
The resistor codes are:
Key number Value (Ohms)
1 392
2 523
3 681
4 887
5 1130
6 1470
7 1870
8 2370
9 3010
10 3740
11 4750
12 6040
13 7500
14 9530
15 11800
Rather than measure it the dealer can check the value based on your VIN.
The resistance of the key matches the programmed setting for your car. The BCM senses the resistance and if it's within 10%, the car starts.
The resistor codes are:
Key number Value (Ohms)
1 392
2 523
3 681
4 887
5 1130
6 1470
7 1870
8 2370
9 3010
10 3740
11 4750
12 6040
13 7500
14 9530
15 11800
Rather than measure it the dealer can check the value based on your VIN.
C5 General
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From: Boosted in Manhattan & Round Rock TX. President of the Non Club Club of Kansas and Round Rock , Not the flat part.