Jeep 2008 Wrangler - Manual (Page 219)

NOTE: Magnetic materials should be kept away from
the top of the instrument panel above the radio. This is
where the compass sensor is located.
Automatic Compass Calibration
The self-calibrating feature of the compass eliminates the
need to calibrate the compass for normal conditions.
During a short initial period, the compass may appear
erratic and the CAL symbol will appear (blinking) on the
display. After the vehicle has completed at least one
complete circle under 5 mph (8 km/h) in an area free
from large metal objects, calibration will be complete
when the CAL symbol is extinguished.
After initial calibration, the compass will continue to
automatically update this calibration whenever the ve-
hicle is in motion.
Manual Compass Calibration
NOTE: Before attempting a manual compass calibra-
tion, the engine must be running and the transmission
in the PARK position (if equipped).
If the compass seems in error or erratic, you may wish to
manually recalibrate the compass. To manually calibrate
the compass, you must first enter the variance mode.
Press and hold the left button (located on the instrument
cluster) for approximately 10 seconds to enter the vari-
ance mode, and release the button when the VAR (Com-
pass Variance) symbol appears. The current variance
value will also be displayed. Once in the variance mode,
it is necessary to release the button, and then press and
hold it again (approximately 10 seconds) until CAL is
displayed (solid, not blinking). Manual compass calibra-
tion has been initiated. Drive the vehicle slowly in one or
more circles under 5 mph (8 km/h) in an area free from
large metal objects until the CAL symbol is extinguished.
218 UNDERSTANDING YOUR INSTRUMENT PANEL