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First you have to locate the navigation DVD player itself. The navigation system DVD players are either under the front seats or behind the navigation screen. All you have to do to update the GPS system is remove the old GPS disc and insert the new GPS disc. The NAV system will update itself. About the only thing you may have to do is reset the region the Navigation system shows. Most of the time you dont have to do anything. It will do all the updates itself.
1 Connect your TomTom device to your computer and switch it on. 2  Wait for TomTom HOME to start. 3  If HOME does not automatically check for updates, click Update my device in the HOME menu. 4  Note: if you would like to install an application you downloaded previously, click Add Traffic, Voices, Safety Cameras etc.or more information see Backing up my navigation device. To check for an updated application version do the following: 1  Connect your TomTom device to your computer and switch it on. 2  Wait for TomTom HOME to start. 3  If HOME does not automatically check for updates, click Update my device in the HOME menu.