Toyota 2009 Avalon Owner's Manual page 135

1-7. Safety information
Installation with LATCH system
STEP 1
STEP 2
Widen the gap between the seat cushion and seatback
slightly.
Type A
STEP 3
Canada only
108
Adjust the seatback as leaned as
As leaned
possible.
as possible
Latch the hooks of the lower
straps onto the LATCH anchors.