Will a new ECM Bypass VATS system
Thread Starter
2nd Gear
Joined: Sep 2023
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Will a new ECM Bypass VATS system
I have a 1996 C4 Corvette. The VATs system is messed up. The ignition was changed out but still wont start. I am wondering if a new ECM will be able to bypass the VATs system and start the car?
Team Owner
Joined: Sep 2003
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NO ! If the CCM/BCM is original you might take your registration and ID to a GM dealer and ask that they do a key code retrieval for you. Most dealers charge for the service and some locksmiths subscribe to a similar service. That retrieval would include generally a 2 letter code for the VATS resistance. First try would be having the code of your new cylinder cut on the matching key blank for correct resistance. If that failed then there's other options. A '96 has a PCM and I don't believe a new PCM would accomplish what you want. You have a NO CRANK after turning KEY to CRANK? Do you have a solid ON SECURITY light?
Team Owner
Joined: Sep 2003
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**** Do you have a relationship with a GM dealer?
Safety Car
Joined: Nov 2008
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From: Seattle Washington
There are a number of ways to disable the VATS system doing a Search here on the Forum will produce many results. What I consider the best way is to have Your ECM re programed to not need a VATS. Different years of ECM''s use different means of achieving this.
Safety Car
Joined: Jun 2010
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Not happening with a 96.
Drifting
Joined: Jul 2004
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From: MA
Safety Car
Joined: Jun 2010
Posts: 4,564
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Correct, but the VATS also deals with the CCM and requires two way communication.
A recent case where somebody has tried “tuning” it out of the ECM.
https://www.corvetteforum.com/forums...ity-light.html
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