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crwdns2944351:0crwdnd2944351:0How to repair the GM VATS control modulecrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Ed Dcrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Ed D

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VATS GM Vehicle Anti Thieft System
Type
technique
Title
How repair the GM VATS control module
Introduction
This repair is for GM vehicles with Vehicle Anti Thief System (VATS) or Pass-Key systems that have the black “Chip” in the key and intermittent No Starts with the dreaded 10 minute wait. If you have a GM vehicle that has the no start issue you can try pulling the module down from under the dash and tap on it with you finger or slightly twist the module box with it still plugged in. If the vehicle starts after doing that I have found it may have a diode in the module with a bad solder joint. Remove the module and remove the board from inside. On the backside of the board I generally re-flow the solder on all the pins on the connector. I then re-flow the solder on the 7 lager diodes and the 2 larger blue color resistors located between the diodes. Most likely you will find that one of the diodes will not allow the solder to flow. You have to remove that diode using a solder sucker to get all the solder from the connections. Be careful not to damage the eyelets around the holes the diodes are mounted thru. The diode will come out easily if there is no solder, so if you are using force then something is wrong. Try to solder the diode back into place on that connection and use the solder sucker again until the diode comes out easily. Clean the board with flux and a tooth brush and maybe a pencil eraser being careful not to damage the eyelets. Then solder the diode back in and if the solder flow smoothly then the repair is finished. Reassemble and reinstall. It is plug and play so start it up.
Time Required Min
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Time Required Max
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Imageid
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Difficulty
Difficult
Conclusion
To reassemble your device, follow these instructions in reverse order.
Author
Ed D
Public
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  • 7mm Deep Socket, Ratchet, Small brush(Toothbrush), Small Solder Iron, Solder, Flux, Pencil that has an eraser. x1 added.

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  • In Progress added.
  • Community-Contributed Guide added.

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