Honda 2009 Pilot Owner's Manual page 358

Compass
3. Turn the selector or TUNE/
SOUND knob to select
''CALIBRATION.''
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4. Press the selector or TUNE/
SOUND knob to enter your
selection. The display shows you
''PUSH CAL START.''
While setting the compass,
pressing the RETURN button (on
EX and EX-L models) will go back
to the previous display. Pressing
the MENU button will cancel the
compass setting mode.
5. Press the selector or TUNE/
SOUND knob. The compass
display is blinking and the CAL
indicator is shown.
6. Drive the vehicle slowly in two
complete circles.
When the calibration is successfully
completed, the CAL indicator goes
off and the compass display will stop
blinking and show an actual heading.
The audio system is not related to
the compass system. Even if the
compass system is calibrating, the
display returns to the normal display
which you last selected.
Do this procedure in an open
NOTE:
area, away from buildings, power
lines, and other vehicles.