Toyota SIENNA 2011 Quick Reference Manual page 401

3-1. When you think a malfunction has occurred
STEP 9
52
SIENNA AAS_U (OM45460U)
Press and hold the front side of
the seatback angle adjustment
switch on the right-hand side of
the seat until a long beep
sounds.
I n f o r ma t i o n P r o v i d e d b y :