Chrysler PT Cruiser Service & Repair Manual page 459

PT
OVERHEAD CONSOLE (Continued)
bridges; or, near overhead or underground power
lines.
(1) Start the engine. If the compass/temperature
data is not currently being displayed, momentarily
depress and release the Step push button (this unla-
beled button is located directly behind the overhead
console display screen) to step through the display
options until you have reached the compass/tempera-
ture display.
(2) Depress the Step push button, until "ZONE"
appears in the display (approx. 5-10 seconds), then
"CAL" will be displayed. Release the Step button
when CAL is displayed. The "CAL" in the display
indicates that the compass is in the calibration mode.
(3) Drive the vehicle on a level surface, at least
fifty feet away from large metal objects and power
lines, in all four compass directions, such as driving
around a city block several times or driving in two to
three complete circles at a slow speed (approx. 5
mph) until the CAL is no longer displayed.
(4) Finally, set the proper zone/variance for the
area you are in, when in manual override mode for
calibration, it defaults to zone 8.
NOTE: If the "CAL" message remains in the display,
either there is excessive magnetism near the com-
pass, or the unit is faulty. Repeat the calibration
procedure at least one more time.
NOTE: If the wrong direction is still indicated in the
compass display, the area selected for calibration
may be too close to a strong magnetic field. Repeat
the calibration procedure in another location.
STANDARD PROCEDURE - COMPASS
VARIATION ADJUSTMENT
Compass variance, also known as magnetic decli-
nation, is the difference in angle between magnetic
north and true geographic north. In some geographic
locations, the difference between magnetic and geo-
graphic north is great enough to cause the compass
to give false readings.
If a customer moves, or drives across zones the
compass variation will have to be reprogrammed so
that the compass will display the correct readings. If
problems like these occur, the compass variance must
be set. Use the following procedure to program the
compass zone variation.
PROGRAMMING ZONE VARIATION
(1) Using the Variance Zone map, find your geo-
graphic location and note the zone number (Fig. 2).
(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
push button to step through the display options until
you have reached the compass/temperature display.
Fig. 2 Variance Zones
MESSAGE SYSTEMS 8M - 3