2006 Toyota Tacoma Owners Manual - Page 572

06 01.06 3. Trip meter reset knob-Resets the two trip meters to zero, and also change the meter display. To change the meter display, quickly push and release the knob. The meter display changes in the order from the odometer to trip meter A to trip meter B, then back to the odometer each time you push. To reset the trip meter A to zero, display the meter A reading, then push and hold the knob until the meter is set to zero. The same process can be applied for resetting the trip meter B. 150 2006 TACOMA from Jan.'06 Prod. (OM35865U)