FORD 2009 Taurus X v.2 - Manual (Page 120)

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 adjustment
Perform the following steps on an open area free from steel structures
and high voltage lines. For optimum calibration, turn off all electrical
accessories (heater / air conditioning, wipers, etc.) and make sure all
vehicle doors are shut.
1. Turn ignition to the on position.
2. Start the engine.
3. Determine your magnetic zone by
referring to the zone map.
4. Press the SETUP control
repeatedly until the message center
says “RESET FOR ZONE SETTING”.
5. Press the RESET control to enter
Zone Setting mode.
6. Press RESET repeatedly until the
desired zone setting is displayed.
The message center will
automatically exit zone setting mode
if enough time passes without
pressing a button.
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2009 Taurus X (219)
Owners Guide, 2nd Printing
USA (fus)
Driver Controls
120