See also:

Have the vehicle inspected by your Lexus dealer immediately.
Failing to investigate the cause of the following warnings may lead to the system operating abnormally and possibly cause an accident. Have the vehicle inspected by your Lexus dealer immediately. ...

PCS (Pre-Collision System)
When the radar sensor detects that a frontal collision is highly likely or even unavoidable, safety systems such as the brakes and seat belts are automatically engaged to lessen impact as well as ...

Installing child restraints using a seat belt (child restraint lock function belt)
Rear facing Infant seat/convertible seat Fold the seatback forward. Then return the seatback and secure it at the first lock position (most upright position). Place the child restraint syste ...