I'm the same boat. I have a 04 EX-L RES. After going in to the dealership to replace the 4th pressure switch (causing a flashing "D") at 113,648 miles, I picked up the Pilot late in the afternoon (Friday) only to notice the SRS light on the dash illuminated. I turned right back around and had them check it out. After having to bring it back 5 days later and be told it will be $811.96 to be repaired.
The Pilot has never been in an accident and the air bags have never been deployed but the sensor now thinks they have been and the fix as noted in post above is to replace the control unit.
I need to go back to the dealership and see what they and American Honda can do for me either under a recall or something else as the failure happened under their watch not mine.
I've thought about trying to replace the unit myself but I think this goes beyond DIY.
-Mike