Question about 2002 Buick Century

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Security light is on - 2002 Buick Century

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The security light, is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. 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 (Theft Deterrent Module). These 3 parts are in CONSTANT communication. If the key is in the ignition, then 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 misinterprets this as an attempt at theft and goes into antitheft mode. The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key all the way through the system. This is why the security light turns on and shuts down your starter, and/or the vehicle after 2-5 seconds. This link explains it pretty well.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Posted on Apr 22, 2014

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If the Security Light is on but is not flashing, the security system is fine. If the security light is flashing then turn the ignition key to the run position (do not start). Wait over ten minutes and then try to start the engine. After the ten minutes you should notice that the light stopped flashing. If the engine starts then you do have a problem with the Passlock Security System.

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The security light is a visual indication that something in the car's antitheft system is failing. In most
GM cars and trucks there is a hidden system that most people are unaware even exists. 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 (Theft Deterrent Module).
These 3 parts are in CONSTANT communication. If the key is in the ignition, then 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 misinterperates this as an attempt at theft and goes into antitheft mode.
The car thinks its being stolen or hotwired because it is not getting that signal from YOUR specific key.
This is why the security light turns on and shuts down your vehicle. Remember too, the TDM controls the
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http://vatspasslockpasskeysecurityhelp.yolasite.com/

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Here is a link that will help with the SECURITY light.

http://vatspasslockpasskeysecurityhelp.yolasite.com/

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The security light is a visual indication that something in the car's antitheft system is failing. In most GM cars and trucks there is a hidden system that most people are unaware even exists. 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/

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Everything you need to know is on this link

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