2009 Toyota Tacoma Owners Manual - Page 353

3-6. Other interior features n Circling calibration Stop the vehicle where it is safe to drive in a circle. Press the switch until appears on the display. CAL At this time, the compass display is locked in N. Drive the vehicle at 5 mph (8 km/h) or less in a circle until the direction is displayed. If there is not enough space to drive in a circle, drive around the block until the direction is displayed. When CAL goes off and the compass display returns to the normal mode, calibration is complete. 334