Jeep 2004 Grand Cherokee - Manual (Page 105)

NOTE: To ensure proper compass calibration, make
sure the compass variance is properly set before manu-
ally calibrating the compass. Refer to Variance Map.
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 three 360 degree turns 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.
UNDERSTANDING THE FEATURES OF YOUR VEHICLE 105
3