Jeep 2011 WK2 Grand Cherokee Owner's Manual page 177

Manual Compass Calibration
If the compass appears erratic and the CAL
indicator does not appear in the EVIC display,
you must put the compass into the Calibration
Mode manually, as follows:
1. Turn ON the ignition switch.
2. Press the UP or DOWN button until the
Setup (Customer-Programmable
menu is reached, then press the SELECT but-
ton.
3. Press the DOWN button until "Calibrate
Compass" is displayed in the EVIC.
4. Press and release the SELECT button to
start the calibration. The "CAL" indicator will be
displayed in the EVIC.
5. Complete one or more 360–degree turns (in
an area free from large metal or metallic ob-
jects) until the "CAL" indicator turns off. The
compass will now function normally.
Features) Compass Variance
Compass Variance is the difference between
Magnetic North and Geographic North. To
compensate for the differences the variance
should be set for the zone where the vehicle is
driven, per the zone map. Once properly set,
the compass will automatically compensate for
the differences, and provide the most accurate
compass heading. For the most accurate com-
pass performance, the compass must be set
using the following steps.
NOTE:
Keep magnetic materials away from the top
of the instrument panel, such as iPod's,
Mobile Phones, Laptops and Radar Detec-
tors. This is where the compass module is
located, and it can cause interference with
the compass sensor, and it may give false
readings.
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