Toyota Lexusc Owner's Handbook Manual page 249

OCCUPANT RESTRAINT SYSTEMS
1. Run the lap and shoulder belt through or around the infant
seat following the instructions provided by its manufacturer
and insert the tab into the buckle taking care not to twist the
belt. Keep the lap portion of the belt tight.
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CAUTION
D After inserting the tab, make sure the tab and buckle
are locked and that the lap and shoulder portions of
the belt are not twisted.
D Do not insert coins, clips, etc. in the buckle as this
may prevent your child from properly latching the tab
and buckle.
D If the seat belt does not function normally, it cannot
protect your child from death or serious injury.
Contact your Lexus dealer immediately.
install the child restraint system on the seat until the
seat belt is fixed.
Do not