View Full Version : HELP vats problem cant figure out


jag81
11-04-2008, 07:00 PM
confused iv tried bypassing it didnt work wat else is there to do beside getting raped by the dealership to fix the problem

WhiteBird00
11-05-2008, 07:59 AM
It would help if you told us what problem you're having. Is the security light in the instrument cluster on solidly or flashing? (If neither then it's not a VATS problem.)

jag81
11-05-2008, 07:04 PM
well wat happened was i went to start it one morning b4 school and turned the key and nothing happened and this has happened b4 and i was just gona bypass it and not deal with it iv tried to different combos to resist it and i get different results one way the light stays lit up and the other flashes i dint know wat else to do :bang:

WhiteBird00
11-06-2008, 08:04 AM
If the security light didn't go or flash when you were initially having trouble starting the car then the problem isn't related to VATS. There are dozens of other reasons that a car might not start.

jag81
11-06-2008, 06:23 PM
no it was light up

WhiteBird00
11-06-2008, 08:44 PM
Do you have a spare key? Have you tried cleaning the key and the ignition cylinder?

The VATS bypass is pretty simple to install but you have to be sure you have the right combination of resistors. There are 15 different values of resistors used by GM (actually, only 14 were ever used in f-bodies). If the key you have isn't working then perhaps you're not getting a valid reading from it for use in your bypass. The dealer can cut you another key using the VIN to lookup the correct key blank.

jag81
11-07-2008, 05:49 PM
well this has happened b4 and i replaced the cylinder so its not the stock one and its been reprogrammed and i had them test it its 5 omhz and thats wat i uded on the bypass and it still didnt work

WhiteBird00
11-08-2008, 06:06 PM
There is no 5 ohm key pellet in GM VATS configurations. Here is a chart of the 15 different values used: http://shbox.com/1/4th_gen_tech2.html#pass_key.

Also, changing the ignition cylinder has nothing to do with the resistance value. The cylinder only has a pair of contacts that connect the key pellet to the BCM. And the BCM can't be reprogrammed to use a different key value.

BobH
12-07-2008, 07:09 PM
Jumping in this. I bought a 94 off some one who bypassed the ign sw. I want to go back to stock set-up. I ohmed out the key and bypassed system and it wasn't the vats. had an ign sw (lwr column) threw that in no change. Is there an electrical feature other the vats in the lock cylinder?? Could that be a problem??

thanks
bobh

99monguse
12-10-2008, 05:00 PM
I had a local locksmith install a brandnew lock cylinder in my SS because the wires were broke for the VATS. He installed it in my driveway and gave me two new keys for about $280.00

jgarrick
12-15-2008, 07:58 AM
iam having the same problem,,tried the resistor,,but now the securty light stays on,,but still no start,,,,,we checked the pellet on the key,,came up to 6 ohms,,,the only resistor i found was a 5.6,,,,could this be the problem,,,do i need to to find a 6 ohm??or is there a window

WhiteBird00
12-15-2008, 12:59 PM
iam having the same problem,,tried the resistor,,but now the securty light stays on,,but still no start,,,,,we checked the pellet on the key,,came up to 6 ohms,,,the only resistor i found was a 5.6,,,,could this be the problem,,,do i need to to find a 6 ohm??or is there a windowYou need to check your key again. I suspect you had the multimeter set to the wrong range. There are 15 different resistor values used by GM for the VATS system (only 14 of those were ever used on f-bodies). The lowest is 392 ohms and the highest is 11,800 ohms. The 12th one is 6040 ohms which could be what you were reading.

Seppo
12-17-2008, 02:22 PM
I used a resistor to bypass the key, but I still had issues with it randomly not letting me start the car. At one point my car wouldn't start for a week.

I had to bypass the bcm at the starter relay. Now sometimes my security light stays on for a few minutes after she starts, but she starts everytime.

99corvette
12-28-2008, 01:15 PM
im having same problem. Car wont start. Light flashes when i try to start it. Got a new key made didnt work. Thinking about ordering the bypass kit from baker electronix