Pioneer SGX-CA600 User Manual page 218

Displays the version and file size of the map.
[Update]: Starts updating the map file.
If there is no information to update, this cannot be selected.
[Delete]: Displays the deletion confirmation screen. If you press the
[Confirm] button in the deletion confirmation screen, the selected map is
deleted and the device restarts.
The device restarts the system after an update finishes.
When an update is started, the current map data is deleted.
If an update fails, the device restarts automatically so add the map data
again.
To add a new map, select [Add Map], select an area, select a region,
and download the map.
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