2010 Jeep Grand Cherokee Owner Manual SRT8 - Page 179

178 UNDERSTANDING YOUR INSTRUMENT PANEL 5. Complete one or more 360-degree turns (in an area free from large metal or metallic objects) until the "CAL" indicator turns off. The compass will now function normally. Compass Variance 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. For the most accurate compass performance, the compass variance must be set using the following procedure: Compass Variance Map NOTE: Magnetic materials should be kept away from 1. Turn the ignition switch ON. the Overhead console. This is where the compass sensor 2. Press the MENU button until Personal Settings is located. (Customer-Programmable Features) menu is reached. 3. Press the SCROLL button until "Compass Variance" is displayed in the EVIC.