2011 Toyota Sienna Owners Manual - Page 665

3-8. Other interior features Calibrating the compass Samoa: 5 Guam: 8 Saipan: 8 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. 574