Toyota Sienna 2010 Owner's Manual page 184

2-3. Operating the lights and wipers
Turning on the high beam headlights
186
With the headlights on, push
the lever forward to turn on the
high beams.
Pull the lever back to the center
position to turn the high beams
off.
Pull the lever toward you to
turn on the high beams.
Release the lever to turn them off.
You can flash the high beams
with the headlights on or off.