VATS Help on a 1995 Seville STS
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=20008
Printed Date: May 18, 2024 at 8:37 AM
Topic: VATS Help on a 1995 Seville STS
Posted By: Trav3D1
Subject: VATS Help on a 1995 Seville STS
Date Posted: October 12, 2003 at 7:58 PM
I have been having a hard time measuring the resistance on the factory key so I can replicate it for my bypass module. Any suggestions.....I have tried everything. Please advise ------------- Trav
Replies:
Posted By: JWorm
Date Posted: October 12, 2003 at 8:12 PM
What's so hard? Take your meter, put it on Resistance, put one probe to one side of the resistor in the key and the other probe to the other side and read the meter.
Posted By: Trav3D1
Date Posted: October 12, 2003 at 8:22 PM
Trust me, I have been doing just that. I even when out to buy a new meter, thinking it was my meter. I cannot seem to get a accurate reading from the key at all, but it I measure a actual resistor, it works just fine..... Any bright ideas? ------------- Trav
Posted By: themagicone
Date Posted: October 12, 2003 at 9:38 PM
got a vise? Put the key in a vise to hold it, your body can screw up the resitance on the key, also you got bout 10%+/- on the value so if its not perfect do worry.
Posted By: Trav3D1
Date Posted: October 13, 2003 at 7:33 AM
The resistor in the key has been measuring .4 ohms. I think that this is usually low, but I plan on adjusting the bypass module to .4 ohms and then trying the remote start. Any further suggestions, just let me know, as I'm not to confident that this will work. ------------- Trav
Posted By: k2thz
Date Posted: October 13, 2003 at 8:27 AM
This strikes me as very low... the resistors for the Passlock I and II systems (which are the descendants of VATS, with a resistor in the cylinder, not the key) are in the 1-20K range. Your meter should be ranged at 20K.
Make sure you're not holding the probes to the resistor with your fingers. Your hand presents an additional (and much smaller) resistance in parallel with the one you're trying to measure.
If you're using a vice, make sure it has plastic or wooden grips, or that the metal grips are powder-coated with an insulating material!
If you still can't measure the resistance directly across the key, you might try measuring it across the wires coming out of the ignition cylinder, the way one would with Passlock. Can anyone comment on the procedure for this? I don't know VATS wire colors...
DDR
Posted By: k2thz
Date Posted: October 13, 2003 at 8:28 AM
Also try reversing the probes?
Posted By: Trav3D1
Date Posted: October 13, 2003 at 8:54 AM
I have clearly identified the VATS wires in the vehicle. They were 2 white wires in an orange tubing. I cut one and the car would not start until I reconnected the wires. After reading your comments, it may be in my best interest to follow the procedures for the Passlock I and II to determine the resistance, and then replicate that resistance on the bypass module. I have exhausted all of my options and need to get this damn car out my shop ------------- Trav
Posted By: jrilla
Date Posted: October 13, 2003 at 11:24 AM
Make sure your meter has autorange and if it does that it is on all the time. If it doesnt have autorange, then go through your ranges to see if you get a better reading. Also, make sure that you are reading the meter properly. a little K will appear on the side of the display when you are reading in the 1000 range. that is how all of the autorange units i have seen work.
I wouldnt suggest just trying different resistences because there is a 10 minute timeout I believe upon an invalid start attempt.
Good luck.
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J Rilla
Owner/Installer
Posted By: Trav3D1
Date Posted: October 20, 2003 at 12:55 PM
Thanks for all your help. The customer did not bring his car back because he was going to trade it in.....go figure. I will keep this information for future reference.
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Trav
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