1986 vats
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3rd Gear
Joined: Jun 2006
Posts: 3
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From: williamsburg new mexico
1986 vats
I bought a 1986 corvette bank repo with no original keys does anyone know how to by pass the vats system to start it I replaced the ignition key cly. but it does not have the chip in the key that only allowed me to get it out of gear
Pro
Joined: Jan 2006
Posts: 667
Likes: 1
From: Centennial Colorado
Originally Posted by kene57
I bought a 1986 corvette bank repo with no original keys does anyone know how to by pass the vats system to start it I replaced the ignition key cly. but it does not have the chip in the key that only allowed me to get it out of gear
I have plenty of them (and there free)....
Melting Slicks
Joined: Mar 1999
Posts: 2,830
Likes: 20
From: Las Vegas Nevada
You have two options at this point - figure out the resistance the VATS module is looking for by buying all 15 resistors and trying each one individually until one works or buy a 30mhz bypass module from someone like www.bakerelectronix.com. I chose the latter. Installation was simple (power, ground, signal wire to ECU) and I put a small hidden switch in the ground wire so I can enable VATS if/when I choose.
A third option is to use a volume control **** and measure the resistance as you turn the ****. Set the **** to each of the 15 resistance values used by the VATS system. This saves you from buying all the resistors, but they are only a few $ from radio shack.
The reason you can't just ground or power the wire from the vats control module to the ECU is that the ECU needs to see a square wave signal, not a straight power or ground. That makes defeating VATS more difficult.
A third option is to use a volume control **** and measure the resistance as you turn the ****. Set the **** to each of the 15 resistance values used by the VATS system. This saves you from buying all the resistors, but they are only a few $ from radio shack.
The reason you can't just ground or power the wire from the vats control module to the ECU is that the ECU needs to see a square wave signal, not a straight power or ground. That makes defeating VATS more difficult.
