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	<title>VAG-COM-FAQ-4.1 - Revision history</title>
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	<updated>2026-05-21T01:05:53Z</updated>
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		<id>https://wiki.ross-tech.com/wiki/index.php?title=VAG-COM-FAQ-4.1&amp;diff=1522&amp;oldid=prev</id>
		<title>Andy at 22:00, 26 January 2006</title>
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		<updated>2006-01-26T22:00:49Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;p&gt;&lt;b&gt;New page&lt;/b&gt;&lt;/p&gt;&lt;div&gt;&amp;#039;&amp;#039;&amp;#039;4.1   Why and How should I test VAG-COM prior to Activating it?&amp;#039;&amp;#039;&amp;#039;&lt;br /&gt;
&amp;lt;br&amp;gt;&lt;br /&gt;
All of our [http://www.ross-tech.com/vag-com/interfaces.html#Chart Current Interfaces] that have built-in Activation, are fully Registered and Activated once you test them on a car. With these Interfaces, the license is built in, you do not have to Activate VAG-COM, but obviously you&amp;#039;ll want to test VAG-COM when you get it to make sure everything works properly.&lt;br /&gt;
&amp;lt;br&amp;gt;&lt;br /&gt;
For our older Interfaces without built-in Activation, or for 3rd party Interfaces:&lt;br /&gt;
&amp;lt;br&amp;gt;&lt;br /&gt;
As per our [http://www.ross-tech.com/vag-com/guarantee.html Guarantee] no refunds will be issued once you have received an [http://www.ross-tech.com/vag-com/tour/activation.html Activation Code] from us. Therefore, it is in your best interest to test VAG-COM with your PC and your vehicle prior to requesting an Activation. First, [http://www.ross-tech.com/vag-com/download/index.html Download] and install VAG-COM on your PC. Find your vehicle on the [http://www.ross-tech.com/vag-com/cars/applications/index.html Applications Page] to see which control modules are in your car.  Connect your Interface to your car&amp;#039;s [http://www.ross-tech.com/vag-com/cars/dlc.html Diagnostic Port] and to your PC.  Turn the ignition ON (turn the key so the Instrument Cluster lights up, but do not start the car -OR- start the car). Go into the [http://www.ross-tech.com/vag-com/tour/option_screen.html Options screen], select the correct port, and click the TEST button.  Ensure that VAG-COM finds your interface, you should see a message that says Interface Found. Now click SAVE.  Select one of your car&amp;#039;s Control Modules (note: your car will not have all the [http://www.ross-tech.com/vag-com/tour/scm_screen.html Control Modules] listed in VAG-COM, only the ones on your Applications Page).  After VAG-COM has [http://www.ross-tech.com/vag-com/tour/open_screen.html Connected], check [http://www.ross-tech.com/vag-com/tour/dtc_screen.html Fault Codes]. Repeat the process for each of your car&amp;#039;s Control Modules. If you encounter problems, please try [[VAG-COM-FAQ-2.4|These Suggestions]] first. If you still have problems, feel free to [http://www.ross-tech.com/contact.html Contact Us] with full details about your PC and vehicle, preferably while you are in front of both.&lt;/div&gt;</summary>
		<author><name>Andy</name></author>
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