COMPASS ZONE VARIANCE (adjust compass for true north)
The compass has a default zone of 8. Refer to the ZONE VARIANCE MAP to determine the correct zone number. The correct compass Zone selection is critical to proper compass operation. With the ignition in the ON position, pressing the CENTER button for 3-6 seconds and then releasing while "Z" is illuminated enters the compass into the Zone display mode. In the Zone display mode, "Z" will be illuminated instead of the temperature. The current Zone number, 1 through 15 will be displayed. While "Z" is illuminated; momentarily pressing the CENTER button advances the zone to the next higher zone. When the desired zone number is displayed, do not press the button again. After 5 seconds, the Zone Variance number will be stored in the module memory.
On long trips, a vehicle may leave its original zone and enter one or more new zones. Generally, if no more that 3 or 4 zones are temporarily traversed, there is now reason to reset the Zone Variance. Only a permanent relocation of the vehicle to a new zone is reason enough to reset the Zone Variance. Each zone is magnetically about 4.2° wide. Until a total nearing 22.5° is accumulated by traversing zones, the typical driver will not notice any difference on the display. Beyond 22.5°, a reading may be off by one or more primary directions.