Nav wont recalulate route when don't follow initial directions

I have an 05 Prius with the Blue Tooth/Navigation option and just last month the navigation computer started giving me issues. I will enter a destination and the computer sets up route but if I decide to take a different route (i.e. shortcut to the freeway), the computer will not update the route to accomodate my new location. The only way I can get directions from the nav system is if I get back to the original planned route.

Has anyone experienced this issue before? Are there any know fixes? I don't really want to go into the service center just for this issue since I'm not due for my next servicing until december.

Aly

 

Thanks. I'll check that after work today.