Compass Calibration.
Depress and hold down both the MODE and E/M buttons while the DIC is in the Compass/Temperature mode. Ignore the variation zone which shows up after 5 seconds and continue holding the buttons. After ten seconds the DIC will acknowledge that calibration is requested by illuminating the C indicator on the compass display if it's not already lit. To calibrate the compass, drive the vehicle through two circles less than 5 mph in a magnetically clean area. The C indicator will disappear and the DIC will display the proper vehicle display.
Setting the Compass Variation.
Compass variation is the difference between magnetic north and geographic north. In some areas of the country the difference is great enough to cause the compass to give a false reading. If this occures, the compass variance must be set. The zones are numbered 1 through 15. Depress and hold both the MODE and the E/M buttons simultaneously while the DIC is in the Compass/Temperature mode. After 5 seconds, the DIC will display the current variation setting. Release the buttons and adjust to the correct variation number using the E/M button. When the desired variation is reached press the MODE button to accept
If tell me what city and state you are from I will tell you the zone number you need to set. This zone map might be in your owners manual.