Dodge 2005 Dakota - Manual (Page 132)

To Put Into a Calibration Mode
Turn on the ignition and set the display to “Compass/
Temperature.” Press and hold the RESET button to
change the display between VAR (compass variance) and
CAL (compass calibration) modes. When the CAL sym-
bol is displayed complete one 360 degree turn in an area
free from large metal objects or power lines. The CAL
symbol will turn off and the compass will function
normally.
Compass Variance is the difference between magnetic
north and geographic north. In some areas of the country,
the difference between magnetic and geographic north is
great enough to cause the compass to give false readings.
If this occurs, the compass variance must be set according
to the Compass Variance Map.
132 UNDERSTANDING THE FEATURES OF YOUR VEHICLE