2010 Toyota Avalon Owners Manual - Page 330

3-6. Other interior features Calibrating the compass 3 Samoa: 5 Guam: 8 Saipan: 8 Interior features The direction display deviates from the true direction determined by the earth's magnetic field. The amount of deviation varies according to the geographic position of the vehicle. If you cross over a map boundary shown in illustration, the compass will deviate. To obtain higher precision or perfect calibration, refer to the following.