2010 Jeep Compass Owner Manual - Page 205

204 UNDERSTANDING YOUR INSTRUMENT PANEL large metal or metallic objects) until the "CAL" message panel. This is where the compass module is located and displayed in the EVIC turns off. The compass will now such devices may interfere and cause false compass readings. function normally. NOTE: A good calibration requires a level surface and an environment free from large metallic objects such as buildings, bridges, underground cables, railroad tracks, etc. Compass Variance Compass Variance is the difference between Magnetic North and Geographic North. To ensure compass accuracy, the compass variance should be properly set according to the variance map for the zone where the vehicle will be driven. When properly set, the compass will automatically account for this difference. NOTE: Magnetic and battery powered devices, (such as cell phones, iPod's, radar detectors, PDA's and laptops) To Set the Variance With the ignition in the ON position, should be kept away from the top of the instrument quickly (less than one second) press and release the EVIC Compass Variance Map