I am flying the Carenado C182T. Aplikasi Bbm Samsung Galaxy Y S5360. Just learning the G1000 because I started out with default GA aircraft learning VOR to VOR navigation. Windows Emulator S there.  The carenado manual for the G1000 is not an effective tutorial. Serial Wedge more. I have loaded an approach to an airprot, and the CDI is tracking the correct direction, The CDI is set to GPS, but when I turn the Autopilot on and engage NAV mode it does not track to the highlighted waypoint. I thought that the NAV mode should track to the CDI whenever it is engaged. I would really appreciate help with this problem, and more generally if someone could direct me to a good tutorial on the G1000 it would be greatly appreciated.