2010 Toyota Highlander Owners Manual - Page 440

3-7. Other interior features NOTICE n To avoid the compass malfunctions Do not place magnets or any metal objects near the inside rear view mirror. Doing this may cause a malfunction of the compass sensor. n To ensure normal operation of the compass l Do not perform circling calibration of the compass in a place where the earth's magnetic field is subject to interference by artificial magnetic fields. l During calibration, do not operate electric systems (moon roof, power windows, etc.) as they may interfere with the calibration. 414