VATS Bypass
Thread Starter
Burning Brakes
Joined: Aug 2002
Posts: 926
Likes: 2
From: chandler az
VATS Bypass
OK - my car has screwed me for the last time. I know the vats module is behind the breadbox on the passenger side. What has to be done to completely bypass it. The ignition key pellet has been bypassed since I got the car - but every once in a while It still locks out the ignition. I know it has to do with the switches on the door locks or the pin switches in the doors - but I can not deal with the unreliability anymore.
does anyone have the wiring diagram? Mine is an '88 if it matters.
does anyone have the wiring diagram? Mine is an '88 if it matters.
Safety Car
Joined: Jan 2001
Posts: 4,386
Likes: 689
From: Boise ID
According to the 87 manual, there are 2 theft deterrent systems, VATS and UTD. The VATS only monitors the ignition switch and shuts down crank and fuel. The UTD only monitors the door and hatch switches and is an audio alarm only. The manual also states that in previous years the UTD did control engine cranking. As said, this is for an 87, who knows what happened in 88.
Drifting
Joined: Aug 2004
Posts: 1,400
Likes: 0
From: Oceansaide CA
Originally Posted by 87SAM
According to the 87 manual, there are 2 theft deterrent systems, VATS and UTD. The VATS only monitors the ignition switch and shuts down crank and fuel. The UTD only monitors the door and hatch switches and is an audio alarm only. The manual also states that in previous years the UTD did control engine cranking. As said, this is for an 87, who knows what happened in 88.
Mine's gone off several times for no apperant reason, I made a thread asking for advice on what exactly triggers it (shaking, handles, ???) but I guess everyone was in the same boat as me not having a clue.
Team Owner
Joined: Mar 2001
Posts: 54,124
Likes: 30
From: Cincinnati, Oh USA
You are having problems with the theft deterrent system. This system
detects a forced entry and blows the horn repeatedly. It is armed and set off by the door jam switches and the door lock switches. The electrical service manual supplement has 4 pages of diagnosis. Most likely you have a defective door jam switch or door lock switch or the wires that go from the door through the door jam are open circuit from flexing or have insulation abraded and are touching ground intermittently. Buy the electrical diagnosis service manual supplement if you want to either repair the deterrent system or learn how to bypass it.
detects a forced entry and blows the horn repeatedly. It is armed and set off by the door jam switches and the door lock switches. The electrical service manual supplement has 4 pages of diagnosis. Most likely you have a defective door jam switch or door lock switch or the wires that go from the door through the door jam are open circuit from flexing or have insulation abraded and are touching ground intermittently. Buy the electrical diagnosis service manual supplement if you want to either repair the deterrent system or learn how to bypass it.
Drifting
Joined: Aug 2004
Posts: 1,400
Likes: 0
From: Oceansaide CA
Well I unplugged my horns for the time being, and it's actually been pretty good. Havn't heard the relays going off since that day..
Hm where do I buy the electric supplement? I'm interested for other things. As far as bypassing the theft crap, are there extraneous sensors on the door locks, or are they monitored from some place else? It would be great to just rip them out. Seriously the more **** they put in these things the worse it gets.
Hm where do I buy the electric supplement? I'm interested for other things. As far as bypassing the theft crap, are there extraneous sensors on the door locks, or are they monitored from some place else? It would be great to just rip them out. Seriously the more **** they put in these things the worse it gets.
Thread Starter
Burning Brakes
Joined: Aug 2002
Posts: 926
Likes: 2
From: chandler az
So - What you are saying is that the VATS (or whatever) doesnt control cranking?
I haven't been able to try the old screwdriver on the solenoid trick (since it is buried) to see if that is the cause.
I haven't been able to try the old screwdriver on the solenoid trick (since it is buried) to see if that is the cause.
Safety Car
Joined: Jan 2001
Posts: 4,386
Likes: 689
From: Boise ID
Originally Posted by brookman
So - What you are saying is that the VATS (or whatever) doesnt control cranking?
I haven't been able to try the old screwdriver on the solenoid trick (since it is buried) to see if that is the cause.
I haven't been able to try the old screwdriver on the solenoid trick (since it is buried) to see if that is the cause.
The UTD (Universal Theft Deterrent) controls the horn (door & hatch switches)
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