How do you reset the maintenance required light on a 2004 Sienna that blinks longer at start up when oil change is due?

I was looking for this same answer and found it on another site and it worked. here is the answer. The system must be reset after the engine oil replacement. Reset the system by the following procedure:

1. Turn the ignition key to the "OFF" position with the odometer reading shown.

2. Turn the ignition key to the "ON" position while holding down the trip meter reset button. Hold down the button for at least 5 seconds. The odometer indicates "000000" and the light goes off.