Pioneer AVIC-505 Owner's Manual page 29

The reset confirmation message appears.
The gyrosensor's learning function memory is reset (see, "Positioning Technology" on page
129 for details of the learning function). This may take a little time; remain stationary until the
location status display appears once again.
• See "Selecting a calibration memory" on page 111 for more information about use of memories.
CAUTION
• Have someone drive with you to watch the display.
• Make sure you have chosen a level stretch of road, and drive straight ahead.
• If g (black) is still displayed, you must go through the calibration process again. Before doing so,
check that a vehicle speed pulse is being received by checking the "LOCATION STATUS" display
(as described on page 108).
• If for any reason you have to stop or avoid an obstacle while driving forward, repeat the calibration
process from the beginning.