See also:

If the passenger’s frontal airbag OFF indicator illuminates and the ON indicator turns off even when the front passenger’s seat is occupied by an adult
This can be caused by the adult incorrectly sitting in the front passenger’s seat. Turn the ignition switch to the “LOCK” position. Ask the front passenger to set the seatback to the upright position ...

Specifications
These specifications are subject to change without notice. ...

Key lock-in prevention function
This function prevents the doors from being locked with the key still in the ignition switch. ...