2011 Toyota Sienna Owners Manual - Page 186

1-3. Adjustable components (seats, mirrors, steering wheel) Entering the vehicle: When either of the following actions has been performed, the seat will move forward (auto return function): • Vehicles without a smart key system: The engine switch has been turned to the "ACC" position. Vehicles with a smart key system: The "ENGINE START STOP" switch has been turned to ACCESSORY mode. • The driver seat belt has been fastened Active head restraints When the occupant's lower back presses against the seatback during a rear-end collision, the head restraint moves slightly forward and upward to help reduce the risk of whiplash on the seat occupant. ITN13N065