Rear Occupant Alert (ROA) System
The Rear Occupant Alert (ROA) is provided to help prevent exiting the vehicle with a rear passenger left in the vehicle. When you open the front door after opening and closing the rear door and turning off the engine, the "Check rear seats" warning message appears on the cluster.
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The function does not actually detect objects or people in the rear seat. By using a rear door opened and closed history, the function indicates that there may be something in the rear seat.
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The rear door opened and closed history can be initialized only when you turn off the engine normally, get off the vehicle and lock the door with the remote control key. Therefore, there could be alarms even though the back doors are locked.
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For example, when you get in and drive your vehicle without locking the doors after the alarm sounds, there could be the alarm sounds if you turn off the engine and open the driver's seat door.
It does not use the actual sensors but it provides the alarm sounds by checking the rear door lock/unlock status as a reminder.