I have a 1996 Camry with the airbag light on. This site helped me figure out how to reset the light.

But it wouldn't reset - got a code 15 - front impact sensor problem.

This problem started about the time the timing belt was changed and some other work was done on the front of the engine so I am thinking maybe something happened to the wiring or the connector got unplugged then. Where are the sensors? I looked around the fender areas, the radiator, around the lights, and didn't see anything that looked like them although I don't really know what I am looking for. Are they up in the fenders and I have to take the lower plastic panels around the wheels?
Thanks,
Jim