FORD 2005 F-150 v.4 - Manual (Page 72)

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 zone/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/calibration adjustment.
Compass zone/calibration adjustment
1. Determine your magnetic zone by
referring to the zone map.
2. Turn ignition to the ON position.
3. Start the engine.
4. From Info menu, select the
Compass/Odometer function. (Do
not select Trip, DTE, or AFE. The
top of the message center must be
blank).
5. Press and hold the SETUP and
RESET controls until the message
center display changes to show the
current zone setting (XX).
6. Press the RESET, then press
SETUP control repeatedly until the
correct zone setting for your
geographic location is displayed on
the message center. The range of
zone values are from 01 to 15 and “wraps” back to 01.
7. To exit the zone setting mode,
and to “lock in” your change, press
and release the RESET control.
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2005 F-150 (f12)
Owners Guide (post-2002-fmt)
USA (fus)
Driver Controls
72