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How to determine which VATS chip your key has.

  
  
  
  
  
  

VATS stands for Vehicle Anti-theft System and is also known as PASS-Key (PersonalCK595512 595525 Automotive Security System). Each VATS key has a resistor embedded within the key-blade, and each resistor has 1 of 15 possible values. Sometimes the resistors are refered to as a Vats Pellet or Vats Chip. Decoding a VATS key is very simple, but it requires that you know how to use an ohm meter. Any multimeter will have an ohm meter and any Radio Shack, Electronic or Hardware Store can sell you one.

CK596772 596785All VATS keys have a resistor embedded in the key blade with metal prongs protruding out of each side of the key blade. In order to read the resistance of the resistor in the key blade, place one lead of the ohm meter on one metal prong, and the other lead on the other metal prong, opposite, on the other side of the key blade. With the leads in their proper position a resistance value can be read from the ohm meter.

The value from your ohm meter will probably not match, exactly, the resistance value in the chart below, but choose the value closest to the value on your ohm meter. The corresponding code number is the identification number of your VATS key.
  1. Go to a Radioshack or other electronics equipment store and use a Digital Multimeter.
  2. Switch it to measure Kilo-Ohms (resistance.)
  3. Take the ends of the terminals of the tester and place them on the metal thread at the center of the VATS chip.
  4. Measure the Kilo-Ohms.  It will be between 0 and 12.
  5. Use this chart to decide which VATS key chip # you need.  Round your number to the nearest value on the chart to determine which VATS chip number your key has.
 

VATS Chip Number

Kilo-Ohms
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

 

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No liability for the use of advice and information are assumed whatsoever for any costs, claims or damages filed for or caused by correct or incorrect use of the information provided.  We cannot and are not responsible for any type of damage, intentional or otherwise, caused by the use of this information.  We are not responsible for any type of harm, whether physical or otherwise, due to correct or incorrect use of the procedures,techniques, or advice provided.