2008 Jeep Wrangler Owner's Manual - Page 219

218 UNDERSTANDING YOUR INSTRUMENT PANEL NOTE: Magnetic materials should be kept away from the top of the instrument panel above the radio. This is where the compass sensor is located. Automatic Compass Calibration The self-calibrating feature of the compass eliminates the need to calibrate the compass for normal conditions. During a short initial period, the compass may appear erratic and the CAL symbol will appear (blinking) on the display. After the vehicle has completed at least one complete circle under 5 mph (8 km/h) in an area free from large metal objects, calibration will be complete when the CAL symbol is extinguished. After initial calibration, the compass will continue to automatically update this calibration whenever the vehicle is in motion. Manual Compass Calibration NOTE: Before attempting a manual compass calibration, the engine must be running and the transmission in the PARK position (if equipped). If the compass seems in error or erratic, you may wish to manually recalibrate the compass. To manually calibrate the compass, you must first enter the variance mode. Press and hold the left button (located on the instrument cluster) for approximately 10 seconds to enter the variance mode, and release the button when the VAR (Compass Variance) symbol appears. The current variance value will also be displayed. Once in the variance mode, it is necessary to release the button, and then press and hold it again (approximately 10 seconds) until CAL is displayed (solid, not blinking). Manual compass calibration has been initiated. Drive the vehicle slowly in one or more circles under 5 mph (8 km/h) in an area free from large metal objects until the CAL symbol is extinguished.