Toyota 2009 Tundra Owner's Manual page 180

Installing child restraints using a seat belt (child restraint lock function belt)
Rear-facing ⎯ Infant seat/convertible seat
n
1-7. Safety information
Place the child seat on the rear
seat facing the rear of the vehi-
cle.
Run the seat belt through the
child seat and insert the plate
into the buckle. Make sure that
the belt is not twisted.
Fully extend the shoulder belt
and then allow it to retract
slightly in order to activate the
ALR lock mode.
Lock mode allows the seat belt to
retract only.
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