See also:

ON
This is the normal operating position after the engine is started. ...

Seatbelt warning light and chime
Refer to “Seatbelt warning light and chime”. ...

Rear seats
Rear seats Seatbelts provide maximum restraint when the occupant sits well back and upright in the seat. Do not put cushions or any other materials between occupants and seatbacks or seat cushion ...