Jeep Cherokee 2000 Service Manual - page 564
(2) Turn the ignition switch to the On position. If
the compass/temperature data is not currently being
displayed, momentarily depress and release the Step
button to step through the display options until you
have reached the compass/temperature display.
(3) Depress both the U. S./Metric, and the Step
buttons. Hold the buttons down until “VAR” appears
in the display. This takes about five seconds.
(4) Release both of the buttons. The current vari-
ance zone number setting will appear in the display.
(5) Press and release the U. S./Metric button to
step through the zone numbers, until the zone num-
ber for your geographic location appears in the dis-
play.
(6) Press the Step button to enter this zone num-
ber into the compass unit memory.
(7) Confirm that the correct directions are now
indicated by the compass.
COMPASS CALIBRATION
CAUTION: Do not place any external magnets, such
as magnetic roof mount antennas, in the vicinity of
the compass. Do not use magnetic tools when ser-
vicing the overhead console.
The electronic compass unit features a self-cali-
brating design, which simplifies the calibration pro-
cedure.
This
feature
automatically
updates
the
compass calibration while the vehicle is being driven.
This allows the compass unit to compensate for small
changes in the residual magnetism that the vehicle
may acquire during normal use. Do not attempt to
calibrate the compass near large metal objects such
as other vehicles, large buildings, or bridges.
NOTE: Whenever the compass is calibrated manu-
ally, the variation number must also be reset. See
Compass Variation Adjustment in the Service Pro-
cedures section of this group.
Calibrate the compass manually as follows:
(1) Start the engine. If the compass/temperature
data is not currently being displayed, momentarily
depress and release the Step button to step through
the display options until you have reached the com-
pass/temperature display.
(2) Depress both the U. S./Metric and the Step
buttons. Hold the buttons down until “CAL” appears
in the display. This takes about ten seconds, and
appears about five seconds after “VAR” is displayed.
(3) Release both of the buttons.
(4) Drive the vehicle on a level surface, away from
large metal objects, through three or more complete
circles in not less than 48 seconds. The “CAL” mes-
sage will disappear from the display to indicate that
the compass is now calibrated.
Fig. 1 Variance Settings
XJ
OVERHEAD CONSOLE SYSTEMS
8V - 5
SERVICE PROCEDURES (Continued)