Hyundai Sonata Hybrid 2021 Owner's Manual page 77

Automatic locking mode
Since all passenger seat belts move
freely under normal conditions and
only lock under extreme or emergency
conditions (emergency locking mode),
you must manually pull the seat belt all
the way out to shift the retractor to the
"Automatic Locking" mode to secure a
child restraint.
The "Automatic Locking" mode will
help prevent the normal movement of
the child in the vehicle from causing
the seat belt to loosen and compromise
the child restraint system. To secure a
child restraint system, use the following
procedure.
To install a child restraint system on the
rear seats, do the following:
1. Place the child restraint system on a
rear seat and route the lap/ shoulder
belt around or through the child
restraint, following the restraint
manufacturer's instructions. Be sure
the seat belt webbing is not twisted.
Information
When using the rear center seat belt, you
OHI038145
should also refer to the "Rear Seat Belt –
Passenger's 3-point system" section in this
chapter.
2. Fasten the lap/shoulder belt latch
into the buckle. Listen for the distinct
"click" sound.
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