How to bypass the VATS system in a late model GM
Contents
1. discussion on the W Body com forums http Awww w body com forum index php topic 31124 15 html Many thanks to James a k a Turbocharged400SBC on the W Body and W Bodysource forums for that info Any questions or comments Feel free to drop me a line at_discostudd likeabigdog com_as am always open to suggestions to improve this document Just beware that might not be able to answer your question if it s beyond what s discussed in this write up http vats likeabigdog com 2 16 2009 6 31 53 PM2. measured in step 1 Radio Shack is a http vats likeabigdog com 2 16 2009 6 31 53 PM How to bypass the VATS system in a late model GM vehicle great place to go for the resistors heat shrink tubing and the bullet style solderless connectors 3 Take the 16 ga wire and cut into 2 four inch pieces 4 Strip off approx 1 16 of insulation off each side of both wire pieces 5 Put your resistors together in series or if you re lucky and have a chip that has a resistance that matches a single resistor and solder one wire to one end of the resistor s and the other wire to the other side Example You measure 11 72 on the 20k k meaning kilo or 1 000 scale The closest match is 11 801 which is a 15 chip Always remember that resistors have a tolerance of 2 meaning the resistance value of the pellet can be either 2 higher or 2 lower than 11 801 k ohms 11 72 falls in tolerance range You will want to aim for 11 801 ohms So when you go to Radio Shack you want to pick up a 10 000 ohm 10k a 1 000 ohm 1k and an 800 ohm resistors to wire together in series to achieve the 11 801k ohm value Here s an example of how you d connect the above mentioned resistors in series wire 10k ohm 1k ohm 800 ohm wire 6 Measure the resistance across the 2 wires now that the resistors are soldered to them Be absolutely sure the value matches that of the resistor pellet in the ignition key within 2 up or
3. on the paper beneath the lower key Adding to WhiteMonteZZZ s suggestion recently received an idea from another W Body com member stockgp recommends using an AXXESS brand key blank 4 The head of the key is longer and thus can be trimmed to the exact shape of a VATS key http vats likeabigdog com 2 16 2009 6 31 53 PM How to bypass the VATS system in a late model GM vehicle I ve seen these keys sold at Wal Mart in the past not sure if they have them anymore and stockgp says he bought his at Busy Beaver in the Pittsburgh area recall K Mart having sold these keys as well Many thanks to WhiteMonteZZZ and stockgp for their very helpful suggestions Now to conclude the document have been shown a way to completely bypass the VATS module altogether The VATS module generates a 30 50hz ground pulsed signal to the ECM PCM to enable the fuel injectors There is a way to fool the ECM PCM into seeing that signal You will need to build your own signal generator with parts from Radio Shack Here s the link to the page with the plans http fp enter net rockcrawl passkey html Here s another well written document on the matter http nome hiwaay net davida1 passkey htm http vats likeabigdog com 2 16 2009 6 31 53 PM How to bypass the VATS system in a late model GM vehicle have no association with the authors of the above 2 articles so please no questions regarding them Here s a link to the original
4. How to bypass the VATS system in a late model GM vehicle How to bypass the VATS PASSKey II system in a late model GM vehicle This document pertains to the following vehicles Pontiac 1994 1996 Grand Prix 1992 1999 Bonneville 1993 2002 Firebird Trans Am Firehawk Buick 1994 1996 Regal 1992 1999 LeSabre 1991 1996 Park Avenue 1991 1996 Roadmaster Oldsmobile 1994 1997 Cutlass Supreme 1992 1999 Eighty Eight LSS Ninety Eight Regency 1991 1996 Custom Cruiser Wagon Chevrolet 1995 1999 Monte Carlo 1995 2001 Lumina 1993 2002 Camaro 1986 1996 Corvette C4 Cadillac http vats likeabigdog com 2 16 2009 6 31 53 PM How to bypass the VATS system in a late model GM vehicle 1991 1996 Fleetwood 1992 1997 Seville STS DeVille Any other GM Vehicles with the VATS or PASSKey II system If your ignition key looks like the one pictured below Before we begin here s a question to ponder When you insert your ignition key and attempt to start the car will the car not even attempt to crank over Does the Security light flash during any time you re attempting to start the car The simple solution is to first clean off the chip on your key or try another key for the same car If that also doesn t work then follow my instructions for a fast simple and relatively inexpensive repair http vats likeabigdog com 2 16 2009 6 31 53 PM How to bypass the VATS system in a late model GM vehicle NOTE After p
5. art the car If your problem was with the VATS reader in the ignition lock cylinder this will start the car If this won t start the car then the problem is in the VATS module If the VATS module is bad remove the resistor pack Strip the insulation off the other side of the main wire cut running from the column and place a male connector on one wire and a female on the other Plug the 2 halves back together to restore the function of the VATS reader Before signing off have received some more info from a fellow W Body com forum member From WhiteMonteZZZ If VATS is disabled via your site then additional keys without the VATS pellet are able to be purchased and used at most local hardware stores The keyblank needed would be an ILCO or equivalent B62 blank this has GM s A keyway no resistor and typically was used on Cadillac Allante vehicles The original key can be cut onto this blank but the head typically needs to be filed down at the part nearest the ignition lock 2 3 mms The standard B62 blank will hit the face of the igniton lock so by shortening the head of the blank you re in turn lengthening the blank He also says you can trim the plain ole ignition key down with a dremel tool Here is a pic he sent to me showing the new trimmed key http vats likeabigdog com 2 16 2009 6 31 53 PM How to bypass the VATS system in a late model GM vehicle You can plainly see where the key is cut by the outline drawn
6. down 7 Cut a length of heat shrink tubing to cover up the resistors allowing a small bit to hang over onto each of the 2 wires Use a lighter or heat gun to shrink the tubing 8 On one of the wires crimp on a male bullet connector and on the other wire crimp on a female bullet connector 9 Now what you have should look like this Notice in the above resistor pack lucked out and only needed 1 resistor to match the pellet s resistance You may not be so lucky http vats likeabigdog com 2 16 2009 6 31 53 PM How to bypass the VATS system in a late model GM vehicle 10 Now move to the car Remove the under dash kick panel 11 Look for an orange wire running down the steering column This wire should have a rubbery feel to it and it is the only orange wire running from the column 12 Cut this wire there are 2 small wires inside and strip back the insulation on the wires on the opposite side of the steering column 13 Install a male bullet connector to one of the 2 wires and a female on the other 14 Plug in your resistor pack that you made by mating the male and female bullet connectors http vats likeabigdog com 2 16 2009 6 31 53 PM How to bypass the VATS system in a late model GM vehicle Column Dash Orange Wire p Install resistor pack and Cut here bullet connectors to this half Side view of orange 2 white wires conduit inside 15 Attempt to st
7. erforming the following procedure your vehicle s factory starter interrupter VATS will be disabled A thief will be able to steal your car much easier than if the VATS system were enabled Now that being said want to stress that am not an expert on the VATS system by no means I simply stumbled across a way to bypass a malfunctioning reader in the ignition lock cylinder On my 92 LeSabre the wires running from under the dash to the reader broke inside the steering column and didn t feel like pulling the column apart to fix or replace the lock cylinder Using a Factory Service Manual located the wires in question and created the resistor pack to jumper accross them Just to reiterate am not an expert on this system and know nothing more than how to bypass the reader in the ignition lock cylinder Please follow the links at the end of this document for further help With that out of the way here s an explanation of the VATS system which culled from a locksmith selling VATS blanks on eBay WHAT IS VATS Vats stands for Vehicle Anti Theft System Lots of people refer to this type of key as a computer Chip key This key or Chip has nothing to do with a computer nor is it a chip But because of the popularity of calling ita computer chip key so will we So that we don t confuse The black chip on the blade of the key is actually a resistor GM first started using the Vats key in 1986 on the Corvetts then s
8. ome of the Cadillacs ect GM uses 15 different resistors in their VATS keys Just by looking at the keys you can t tell the difference How does the VATS System work Each VATS key has it s own unique cuts on the key to operate the lock but the cuts alone will not allow the car to crank This is called a mechanical key Each car has a VATS module Brain under the dash that communicates to the starter fuel pump and the ignition lock Each VATS module is randomly given a value from the manufacturer When the proper mechanical keys along with the proper VATS chip resistor value turns the ignition lock the VATS module reads the chip on the key If it is the correct chip the VATS module will tell the starter and the fuel pump to operate If the wrong chip is read the VATS module will tell the starter and the fuel pump to shut down How to determine the Value of your key By chance you may know what VATS key you now have Most people do not There are basically two ways to determine what VATS key you have Remember there are 15 differrent possibilities First your key can be read in a VATS tester Most locksmiths have these readers and don t change anything to tell you There is another way for http vats likeabigdog com 2 16 2009 6 31 53 PM How to bypass the VATS system in a late model GM vehicle you to read the key value yourself If you have a Volt Meter you can test the OHMS resistance value of the chip yourself Just
9. set your Volt meter to check OHMS take each lead and place it on each side of the chip on your key Anumber will appear Take that number on your volt meter and apply it to the OHMS chart below Keep in mind that it may not be exact Just pick the closest value to your reading This chart is for any GM product Buick Cadillac Oldsombile Chevrolet and Pontiac that has a VATS key single or double sided VATS K OHMS Set your meter to the 20k ohm setting 1 0 402 2 _ 0 523 3 0 681 4 _ _ 0 887 5 1 130 6 _ 1 470 7 _ 1 870 8 2 370 9 3 010 10 3 740 11 _4 750 12 _6 040 13 _7 500 14 _ 9 530 15 _11 801 Okay onward we go Tools and supplies needed Soldering Iron Wire Cutters Strippers Crimper Voltmeter Ohmmeter DMM Approx 8 inches of 16 ga wire Speaker wire works great Bullet Style solderless connectors Heat Shrink Tubing Resistors of varying values totalling the resistance measured across the key s pellet Alright let s begin the madness 1 Take your DMM set it to measure Ohms use the 20k setting Measure the resistance across the pellet of the ignition key Place one probe on the silver part of one side of the pellet and the other probe on the other side Write this value down 2 Purchase a resistor or resistors that add up to the value
Download Pdf Manuals
Related Search