Acura TL 2007 Owner's Manual page 235

Compass Calibration
If you see '' '' in the compass
display, the compass is self-
calibrating. The compass may need
to be manually calibrated after
exposure to a strong magnetic field.
If the compass seems to be
continuously showing the wrong
direction and is not self-calibrating,
do the following.
NOTE: Do this procedure in an open
area, away from buildings, power
lines, and other vehicles.
1. Press and hold the and
buttons simultaneously until
the temperature display changes
(about 5 seconds).
2. Verify that the zone setting is
correct by finding your area on the
map on page 230 .
3. Press the button to cycle the
count down, or the button to
count up. Once the correct zone is
displayed, continue to step 4.
4. Press the OFF button to save the
zone selection.
5. Press the OFF button again to
begin calibrating the compass.
The heading should now show
'' ''.
Compass
6. Drive the vehicle slowly in two
complete circles.
7. When the display goes from
'' '' to an actual heading, the
unit is calibrated and the display
returns to normal.
CONTINUED
229