Toyota Sienna Owner's Manual page 53

If the AUTO ACCESS SEAT does not move even when a switch is
pressed
Before conducting this procedure, conduct the procedures explained
in the "Initializing the seat position information" and "If the AUTO
ACCESS SEAT moves when a switch is pressed" sections.
If the AUTO ACCESS SEAT still does not return to the vehicle, the fol-
lowing procedure can be used to return the AUTO ACCESS SEAT to
the vehicle.
Adjust the head restraint to the downmost position. (P. 10)
1
Fold the footrest up. (P. 13)
2
Fold the front passenger seatback. (P. 21)
3
Remove the 4 clips and remove
4
the unit cover. (P. 57)
Remove the clips from the unit,
5
and roll back the cover.
(P. 57)
SIENNA_AAS_OM08011U_(U)
3. When you think a malfunction has occurred
53
3
Clips