Tesla Y Owner's Manual page 143

Maps and Navigation
If Trip Planner estimates that you won't have enough
energy for your round trip, and there are no
Superchargers available on your route, Trip Planner
displays an alert at the top of the turn-by-turn direction
list notifying you that charging is needed to reach your
destination.
Map Updates
As updated maps become available, they are
automatically sent to Model Y over Wi-Fi. To ensure you
receive them, periodically connect Model Y to a Wi-Fi
network (see Connecting to Wi-Fi on page 160). The
touchscreen displays a message informing you when
new maps are installed.
Using the Touchscreen 141