Toyota 2009 Tundra Owner's Manual page 226

2-2. Instrument cluster
Average Speed
Feature customization
The vehicle can be customized while the vehicle is stopped.
Press the SETUP US/M button to select the item you want to
customize unit.
UNITS
KEYLESS ENTRY FEEDBACK
KEYLESS ENTRY RELOCK TIMER
KEYLESS ENTRY ALL DOORS UNLOCK
DOOR AUTO LOCKING
DOOR AUTO UNLOCKING
HEADLAMPS AUTO OFF TIMER
COURTESY LAMPS OFF TIMER
DEFAULT SETTING
200
Displays the average vehicle speed since the
engine was started or the function was reset.
The function can be reset by pushing the SELECT
RESET button for more than 2 seconds.