Toyota Lexusc Owner's Handbook Manual page 194

Fastening front and rear seat belts
Adjust the seat as needed and sit up straight and well back
in the seat. To fasten your belt, pull it out of the retractor
and insert the tab into the buckle.
You will hear a click when the tab locks into the buckle.
The seat belt length automatically adjusts to your size and the
seat position.
The retractor will lock the belt during a sudden stop or on
impact. It also may lock if you lean forward too quickly. A slow,
easy motion will allow the belt to extend, and you can move
around freely.
OCCUPANT RESTRAINT SYSTEMS
When a rear seat belt is completely extended and is then
retracted even slightly, the belt is locked in that position and
cannot be extended. This feature is used to hold the child
restraint system securely. (For details, see "Child restraint" on
page 224.) To free the belt again, fully retract the belt and then
pull the belt out once more.
If the seat belt cannot be pulled out of the retractor, firmly pull
the belt and release it. You will then be able to smoothly pull
the belt out of the retractor.
CAUTION
D After inserting the tab, make sure the tab and buckle
are locked and that the belt is not twisted.
D Do not insert coins, clips, etc. in the buckle as this
may prevent you from properly latching the tab and
buckle.
D If the seat belt does not function normally,
immediately contact your Lexus dealer. Do not use
the seat until the seat belt is fixed, because it cannot
protect an adult occupant or your child from injury.
175