BTW, the air bag system passenger seat occupant simulator is located right next to the power amplifier in the foot well. Water in that location could get into the module connectors and corrode them or even damage the module. That could be causing your problem. You should check to see if there is any corrosion damage. As far as modules go they are pretty cheap on ebay. Diagnostic testing procedures are in the service manual. The document section of the forum has a link to download it if required.