Mazda 2008 Mazda6 Owner's Manual page 438

Symptom
No GPS
symbols are
displayed
The vehicle
position is not
displayed
No voice
guidance
Buttons on the
remote control
do not beep
56
lGPS signals may not be received because of obstructions.
After moving the vehicle away from obstructions, the GPS
signals can be received.
lCheck if the mode is set to the current position screen.
Press
POS
lCheck if the volume control for the voice guidance has been
turned off.
lCheck if the vehicle is off the route.
Repeat the route search while checking the route guide
screen.
lCheck if you are driving the vehicle in the wrong direction on
the route.
Repeat the route search checking the direction of the
destination.
lCheck if [Beep] is set to [Off] (
Check point
page 18).