is there a vat key security bypass
#1
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i lost my key and now i cant get it to do anything is there a way to bypass it i know how to hot wire it but it wont do anything cause the vat tell the motor not to let the fuel pump work and all that so if u know how plaz help
#2
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Originally Posted by 1999camaroz28racer
i lost my key and now i cant get it to do anything is there a way to bypass it i know how to hot wire it but it wont do anything cause the vat tell the motor not to let the fuel pump work and all that so if u know how plaz help
#3
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Stereo shops sell VATS bypass kits with car alarms - for remote start capability. However, they need to be able to measure the resistance of your key to know which of the 15 resistors it uses. Otherwise, it's trial and error.
So if you have a buddy who works for a stereo shop, he can probably get ya going if you really want to go that route.
Keys are in the $20-$30 range from the dealer. My wife's minivan has a PK3 (Passkey 3 - no resistor, but something in the plastic) system - and her key cost over $40.
So if you have a buddy who works for a stereo shop, he can probably get ya going if you really want to go that route.
Keys are in the $20-$30 range from the dealer. My wife's minivan has a PK3 (Passkey 3 - no resistor, but something in the plastic) system - and her key cost over $40.
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#4
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if you knew your keys resistance, you can go over to radioshack adn buy a $2 resistor and splice it in to the connector at the bottom of the steering colum. i have done it a couple of times for customers that dont want to buy a new ignition cylinder.
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I lost one of my keys and went to a chevy dealer and ordered a new key ($25). I had the other to make the copy but a couple of years ago my grandmother locked her keys in her car and the dealer was able to provide the local NAPA store with info to make a new one. I'd check a dealer before hacking on your wiring.
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when i first started reading this thread, i was excited to know that it seems almost impossible for someone to steal my car, but knowing that anyone can go somewhere and get these items is not cool. I hope people have to show proof of vehicle ownership for that.
I would recommend going to the dealer also.
I would recommend going to the dealer also.
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the vats system is a joke, I am having the same problems, I searched the entire web last night at work(no messageboards) and one site was basically how to steal a camaro and vehicles with vats/passkey. Well for 4th gens each key has a resistence value, there are 15 different values. They are listed on the net, and 1 of 15 will start your car. If you have the 15 keys made it is hit or miss to steal the car on the 1st time, but with all 15 the car can be stolen in less than an hour, if the vats makes the thief wait 4-6 minutes per attempt.
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#8
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Originally Posted by JCurtin
the vats system is a joke, I am having the same problems, I searched the entire web last night at work(no messageboards) and one site was basically how to steal a camaro and vehicles with vats/passkey. Well for 4th gens each key has a resistence value, there are 15 different values. They are listed on the net, and 1 of 15 will start your car. If you have the 15 keys made it is hit or miss to steal the car on the 1st time, but with all 15 the car can be stolen in less than an hour, if the vats makes the thief wait 4-6 minutes per attempt.
Ryan.
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Originally Posted by 1999camaroz28racer
i lost my key and now i cant get it to do anything is there a way to bypass it i know how to hot wire it but it wont do anything cause the vat tell the motor not to let the fuel pump work and all that so if u know how plaz help
#10
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well hey all,I am now going through that same problem but i had a new ignition switch just installed,and I still have a no crank no start situation,so if any of u guys know my next move and dont say dealer,they are so exspensive,please let me know.Thanks
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I fitted a new BCM to give me keyless entry about 9 months ago and it was a different vat key number. So I got the 15 vlaues for the resistors and went to a large electrical store and bought the 15 resistors. They only cost pennies, I then unplugged my vats under the dash below the steering wheel.
![](http://i14.photobucket.com/albums/a344/ineedalager/air_bag_disc_2.jpg)
I then put each different resistor in until I found the right one, then I taped it in there until I could get a key cut with the correct value chip. You will get a surity light when the resistor is wrong and engine start when it's right.
This will bypass vats
Not sure to do for a lost key!
Always have a spare keys cut if your car has one key is a good tip I also have a spare remote aswell.
![](http://i14.photobucket.com/albums/a344/ineedalager/air_bag_disc_2.jpg)
I then put each different resistor in until I found the right one, then I taped it in there until I could get a key cut with the correct value chip. You will get a surity light when the resistor is wrong and engine start when it's right.
This will bypass vats
Not sure to do for a lost key!
Always have a spare keys cut if your car has one key is a good tip I also have a spare remote aswell.
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It is true that VATS has 15 resistor codes but it will "time out " for ten minutes after a failed attempt so stealing a car in a hour isn't nearly as easy as one might think .
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Mine never timed out, I tried 4 resistors one after the other. The car wil not start after the wrong resistor is tried and the security light comes on then you try the next one.
I could have left it with the correct resistor taped in there and that has by passed vats. Instead I sent off to the USA for the correct number chip key blanks and got them cut to match my key. Then I removed the resistor to restore the vats system.
This would make my car very difficult to steal in the UK because the keys are so different than most UK cars!
I could have left it with the correct resistor taped in there and that has by passed vats. Instead I sent off to the USA for the correct number chip key blanks and got them cut to match my key. Then I removed the resistor to restore the vats system.
This would make my car very difficult to steal in the UK because the keys are so different than most UK cars!
#14
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Originally Posted by 1993regency98
well hey all,I am now going through that same problem but i had a new ignition switch just installed,and I still have a no crank no start situation,so if any of u guys know my next move and dont say dealer,they are so exspensive,please let me know.Thanks
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I am wondering if the VATS unit could just go out compleatly. I have a 93 Z28, and it wont crank either. I have took a reading of the key "chip" it read 1.48K OHM. I placed a resister ( 1.5K 5%) across the plug leading to the VATS unit. and still no start. The security light will flash. I did take a reading on the other end of the plug going to the switch, and it read 10.5K with the key on the off spot. I also tapped on the relays located in the engine compartment. And still no go.
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Originally Posted by 76hearse
I am wondering if the VATS unit could just go out compleatly. I have a 93 Z28, and it wont crank either. I have took a reading of the key "chip" it read 1.48K OHM. I placed a resister ( 1.5K 5%) across the plug leading to the VATS unit. and still no start. The security light will flash. I did take a reading on the other end of the plug going to the switch, and it read 10.5K with the key on the off spot. I also tapped on the relays located in the engine compartment. And still no go.
This where I got my info how to check the Vats key pellet values from and I have all 15 resistors. If you are getting a security light it would look like the vats is no seeing the resistor. Just pull apart the black plug and put the resistor in the side with the orange wires to bridge the two of them. Then tape it in with black tape if it works.
Here where to put the resistor you don't have to splice anything.
![](http://i14.photobucket.com/albums/a344/ineedalager/Camaro/air_bag_disc_2.jpg)
I am not saying you are doing anything wrong but have you compared the resistor you have directly to your key pellet to see how close they are. The table for resitor values gives you a range the resistor has to fall between so the BCM will reconise it.
If you have done all this then it looks like it may be time to visit the GM dealer.
Last edited by 99Z28camaroman; 08-12-2011 at 12:06 PM.
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I have just thought of something that could save you a trip to the dealer if you want to try it.
You will have to check if your car is the same as mine as I changed the BCM on my 99 Z28 to give me keyless entry I had to buy all 15 different resistors to find the right one.
You could get a BCM from a breakers yard you may be able to test the original key they came with the car to find out what chip it has. Oh another thing I can't do this because I don't have a GM dealer within easy distant from me is they can reprogram a BCM to match your keys pellet.
I hope some of this is useful to you.
You will have to check if your car is the same as mine as I changed the BCM on my 99 Z28 to give me keyless entry I had to buy all 15 different resistors to find the right one.
You could get a BCM from a breakers yard you may be able to test the original key they came with the car to find out what chip it has. Oh another thing I can't do this because I don't have a GM dealer within easy distant from me is they can reprogram a BCM to match your keys pellet.
I hope some of this is useful to you.
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Originally Posted by 76hearse
Yea, may just have to buy the 15 resisters. and try them one at a time, just incase my key lost its value.
#20
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Start with the easy possibilities. Swap the starter and ignition relays. If it turns over it's a bad relay. That's what mine was. And the security light was coming on too, that doesn't matter.