TOYOTA 2011 Sienna - Manual (Page 237)

190
1-7. Safety information
Run the seat belt through the
child restraint system and insert
the plate into the buckle. Make
sure that the belt is not twisted.
Fully extend the shoulder belt
and allow it to retract to put it in
lock mode. In lock mode, the belt
cannot be extended.
While pushing the child restraint
system down into the rear seat,
allow the shoulder belt to retract
until the child seat is securely in
place.
After the shoulder belt has
retracted to a point where there is
no slack in the belt, pull the belt to
check that it cannot be extended.
STEP 2
STEP 3
STEP 4