2004 Jeep Wrangler Owner's Manual - Page 48

48 UNDERSTANDING THE FEATURES OF YOUR VEHICLE When the vehicle is new, the compass should initially be verified for correct compass variance (refer to Compass Variation Adjustment) and calibrated manually (refer to Manual Calibration). This will ensure correct initial calibration and eliminate initial erroneous compass headings. Manual Calibration If the compass appears erratic and CAL does not appear, you must manually put the compass into the calibration mode. To ensure proper compass calibration, make sure the compass variance is properly set before manually calibrating the compass (refer to Compass Variation Adjustment). To put the compass into calibration mode: Turn the ignition to the ON position. Press and hold the center button for more than 6 seconds until CAL (calibration mode) appears in the display. To change the display between VAR (compass variance) and CAL (compass calibration) modes. Release the button to invoke manual calibration mode. To recalibrate the compass, drive the vehicle at less than 5 mph (8 km/h) through up to CAL should display for a complete 11⁄2 360° turns in an area free from large metal objects or power lines. When the compass has been calibrated, the CAL symbol will turn off and the compass will function normally. Compass Variation Adjustment Compass Variance is the difference between magnetic north and geographic north. In some areas of the country, the difference between magnetic and geographic north is great enough to cause the compass to give false readings. If this occurs, the compass variance must be set according to the Compass Variance Map. NOTE: When the mirror is in the VAR mode, the letter "Z" will be displayed along with the currently selected zone number.