FORD 2011 Taurus v.3 - Manual (Page 79)

ELECTRONIC COMPASS (IF EQUIPPED)
The compass heading is displayed in the center integrated display (CID).
The compass reading may be affected when you drive near large
buildings, bridges, power lines and powerful broadcast antenna. Magnetic
or metallic objects placed in, on or near the vehicle may also affect
compass accuracy.
Usually, when something affects the compass readings, the compass will
correct itself after a few days of operating your vehicle in normal
conditions. If the compass still appears to be inaccurate, a manual
calibration may be necessary. Refer to Compass calibration
adjustment.
Most geographic areas (zones) have a magnetic north compass point that
varies slightly from the northerly direction on maps. This variation is four
degrees between adjacent zones and will become noticeable as the
vehicle crosses multiple zones. A correct zone setting will eliminate this
error. Refer to Compass zone adjustment.
Compass zone adjustment
1. Determine which magnetic zone
you are in for your geographic
location by referring to the zone
map.
2. Turn ignition to the on position.
3. Press and hold the 7 and 9 radio
preset buttons together for
approximately five seconds until
ZONE XX appears in the CID.
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Driver Controls
79
2011 Taurus
Owners Guide, 3rd Printing
USA (fus)