1996 VATS delete
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
The easiest thing to do is find the resistance of the pellet in the key or find the key code on the 15 key chart and get the center resistance for that key. Then just add a resistor across the 2 wires for the key contact switch in the column. Then you can use any kind of ignition switch you want.
Also there is no ECU "name" used for the 96 (and others). The 96 uses a PCM for the engine computer. (ECU is reference to for older GM cars). The key pellet resistance is read by the CCM where it is part of the VATS system in the CCM . The PCM which runs the engine is turned on by the CCM so communication is necessary.
Also there is no ECU "name" used for the 96 (and others). The 96 uses a PCM for the engine computer. (ECU is reference to for older GM cars). The key pellet resistance is read by the CCM where it is part of the VATS system in the CCM . The PCM which runs the engine is turned on by the CCM so communication is necessary.
Melting Slicks
Joined: Feb 2003
Posts: 2,672
Likes: 810
From: Saskatoon Sask.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
I will not dispute your findings on the Camaro and what works for you.
But there nothing under the hood that looks the wiring on a corvette, where is the ECM, and wiring for it. On the vette with key ON power comes from 2 banks of fuses for the injectors directly. The injectors are fired by closing the return via the ECM/PCM.
Power for the coil comes directly from a fuse in the fuse box.
The ECM/PCM will do nothing unless the 50 cycle handshake is present from the CCM. If there is a way to eliminate this I'd love to know.
The ECM/PCM on a 92-96 vette has 4 multi wire connectors on the unit with lots of colors in each to choose from. No way you can just pick out a wire and connect it to another.
I think to eliminate the CCM and rip it out, I think you would have to change a lot of the software in the ECM/PCM to make it self sufficient, maybe I'm wrong?
Melting Slicks
Joined: Jan 2009
Posts: 3,482
Likes: 196
From: folsom california
Easy way? well this worked for me on my 96, at the theft deterrent relay the large yellow wire 5 feeds twelve volts to the relay when the ignition switch is closed in the "start" position and when the relay closes that power leaves the relay via the 5 Purple wire which goes to the starter solenoid. Jump these two wires together and you are now independent of the CCM which only closes (or doesn't close thereby disabling the starter) the low amperage side of the theft deterrent relay.
In other words, you now have a conventional starter circuit minus the clutch safety switch. If doing a custom wiring, you could include a clutch safety switch in the circuit.
Now before I get flamed by those who probably know more than I do, this worked for me; there are those say it can't work because the VATS also disable the fuel injectors.
In other words, you now have a conventional starter circuit minus the clutch safety switch. If doing a custom wiring, you could include a clutch safety switch in the circuit.
Now before I get flamed by those who probably know more than I do, this worked for me; there are those say it can't work because the VATS also disable the fuel injectors.
Last edited by mtwoolford; Dec 14, 2017 at 11:41 PM.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
Easy way? well this worked for me on my 96, at the theft deterrent relay the large yellow wire 5 feeds twelve volts to the relay when the ignition switch is closed in the "start" position and when the relay closes that power leaves the relay via the 5 Purple wire which goes to the starter solenoid. Jump these two wires together and you are now independent of the CCM which only closes (or doesn't close thereby disabling the starter) the low amperage side of the theft deterrent relay.
In other words, you now have a conventional starter circuit minus the clutch safety switch. If doing a custom wiring, you could include a clutch safety switch in the circuit.
Now before I get flamed by those who probably know more than I do, this worked for me; there are those say it can't work because the VATS also disable the fuel injectors.
In other words, you now have a conventional starter circuit minus the clutch safety switch. If doing a custom wiring, you could include a clutch safety switch in the circuit.
Now before I get flamed by those who probably know more than I do, this worked for me; there are those say it can't work because the VATS also disable the fuel injectors.
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Melting Slicks
Joined: Jul 2005
Posts: 2,649
Likes: 863
And since the 1996 is a full OBDII system - all the programming can be done through the OBDII connector - no PROM erasing and reburning...
Team Owner
Joined: Jul 2004
Posts: 28,426
Likes: 3,277
From: Hartford WI
It is primitive compared to what we have today but it makes it harder to steal a car. I doubt it is significantly different than a modern Ford with PATS or Mercedes with DAS.