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Posted on Jan 02, 2017
SOURCE: 2005 F-150 Need To Reset
Hi and welcome to FixYa!
As a first course of action please disconnect the positive battery connector and let it sit for atleast 5mins. then reconnect it again. This should reset the system.
After reconnection of the positive battery connector please insert the key and turn it on ON position but don't crank it then turn OFF. Perform this ten times and on the 10th time crank the engine.
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Posted on Dec 20, 2010
The security system (VATS/Passkey) installed on these GM cars is anti-owner more than an anti-theft. There are 3 parts involved:
Posted on Feb 27, 2011
Unfortunately this has been a real problem on GM vehicles for a very long time. I copied this to help you understad how this works.
From the moment you put your key in the ignition, there begins a constant line of communication between your key's security chip or transponder, to the ignition's lock cylinder, and then to the car's TDM. These 3 parts are in CONSTANT communication. If the key is in the ignition, these parts are sending signals to each other. The security light illuminates when that signal gets broken, even just for a second. When the signal breaks, the car goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key. There is where the security light turns on and shuts down your vehicle.
http://vatspasslockpasskeysecurityhelp.yolasite.com/ This link should help you
Posted on Nov 12, 2011
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