Light Malfunction?

[nielandm]

In my 2011 Yaris hatch, the passenger air bag has not once been set on and the seatbelt light always flashes. Probably needs to be taken into the dealer to get fixed, but just a bit curious if anyone else has had this problem and/or what you've done.

[CTScott]

The flashing of that light indicates a problem with the passenger occupant classification system (the system that weighs what/who is in the passenger seat and decides if it should pop the airbag for them).

The two common causes are either the passenger seatbelt buckle connector or the occupant classification ECU's connnector (the little black box under the front edge of the passenger seat) not being properly seated.