Help...My airbag light came on this morning after a battery install.
 

The light has never been on and the only thing that I have done is take battery out and install a battery. Is there anything simple that can cause this? I called the dealer and they said something about a seat belt clip update..blah blah blah and that would cost me $800! Someone please help if possible. I do not want to give $800 to the dealership for a small problem I can fix myself. I just do not know where to begin, and I do not want to mess with the airbag system with no clue.
Thanks,
Pat