Toyota Lexusc Owner's Handbook Manual page 59

KEYS AND DOORS
Back door closer
When the back door has not been fully closed, it is fully
closed automatically even if the power back door system
is off.
NOTICE
Do not apply excessive force when the back door closer
is operating. Otherwise, the back door closer may
become defective.
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CAUTION
D Careful attention is needed so as not to get your
fingers trapped as the back door automatically
closes when it has not been fully closed.
D Never allow a child to operate the back door.