Passenger airbag is off on the my es300h. How do I turn it back on?

 

If no one is sitting in the front passenger seat, the passenger air bag is automatically turned off, and the light alerting that it is off is turned on.

When that front passenger seat is occupied, the air bag is turned on and the alert light turns off.

 

The weight has to be significant to turn it on. A baby in a baby seat won't do it by design..