"Turn ignition key to 'ON' and press the odometer button until the display reads actual mileage... not Trip A or B.
Turn ignition key to OFF.
Hold in the same button you used in step 1.
While holding the button in, turn ignition key to 'ON'.
The 'Maint Reqd' light should blink and go out."
Monday, October 23, 2006
Toyota Highlander: Turn off maintenance light
How to shut off maintenance required light on your Toyota Highlander?: