VATS Problem
Thread Starter
2nd Gear
Joined: Dec 2009
Posts: 2
Likes: 0
VATS Problem
I have a 1991 ZR1 that when I bought it the keys were missing and GM has no records on the keys resistance values for the VIN #. I have been trying repair this problem off and on for about six months and am close to setting fire to it. I was told that you could measure the resistance on your two wire VATS connector that goes to the CCM and that resistance is 4.3 k ohms. All of the resistance tables that I have found do not list this as a correct resistance. Need some help please.
Race Director
Joined: May 2006
Posts: 10,691
Likes: 71
From: Phoenix Arizona
Any locksmith should be able to fix it for you. They use an "interigator" that mimics the 15 resistance codes. Remove the ignition key assembly and they can get the key cut code off of it. The door key can be made off of the glovebox key (there are only four cuts on it, but by adding them they can come up with the fifth cut). Should cost about $200.
Drifting
Joined: Oct 2004
Posts: 1,957
Likes: 6
From: The Woodlands TX TX
PM "WEGONE" He knows how to figure out which key you need. He has access to a vats interrogator, and I think you just need a shop with one of those to read it. Then you buy the key and waallaa!
Team Owner
Joined: Sep 2003
Posts: 25,419
Likes: 2,746
I have a 1991 ZR1 that when I bought it the keys were missing and GM has no records on the keys resistance values for the VIN #. I have been trying repair this problem off and on for about six months and am close to setting fire to it. I was told that you could measure the resistance on your two wire VATS connector that goes to the CCM and that resistance is 4.3 k ohms. All of the resistance tables that I have found do not list this as a correct resistance. Need some help please.
Where are you located? Do you have a key code that will "rotate" the ignition cylinder?
Race Director
Joined: Aug 2000
Posts: 12,110
Likes: 50
From: SW Michigan
instead of wating 6 months you could have got a key cut for the ignition or changed the ignition switch, go n ebay and buy each of the 15 keys and have them cut to the ignition and you would figure it out that way.
Tech Contributor
Joined: Sep 2009
Posts: 1,286
Likes: 92
From: South Dakota/California
Last edited by Dynomite; Dec 23, 2009 at 11:42 PM.
Melting Slicks
Joined: Aug 1999
Posts: 2,619
Likes: 1
From: Whidbey Island Washington
I have a 1991 ZR1 that when I bought it the keys were missing and GM has no records on the keys resistance values for the VIN #. I have been trying repair this problem off and on for about six months and am close to setting fire to it. I was told that you could measure the resistance on your two wire VATS connector that goes to the CCM and that resistance is 4.3 k ohms. All of the resistance tables that I have found do not list this as a correct resistance. Need some help please.
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Burning Brakes
Joined: May 2007
Posts: 965
Likes: 13
From: turn 12 at Road America or TX
I thought the dealers had a gadget with the 15 resistors that could be used as a trial and error way of finding the correct resistance value.
Advanced
Joined: Jul 2004
Posts: 87
Likes: 0
From: north riverside il
got and easy way!
on my 90 i took the blue and white wire out of the ecm striped it and solder a wire on it. put it to ground. now the switch is always on with the key on or off bypassing the switch !!!
