Normal Operation
WARNING: This page is about a different car, the 2005 Ford RV Cutaway, 2005 Ford Econoline, 2005 Ford E450 Super Duty, and 2005 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
The restraints control module (RCM) monitors the resistance for the driver air bag ignitor by measuring the resistance at RCM C310a pins 1 and 2. If the RCM detects high resistance between these pins, it will store a diagnostic trouble code (DTC) B1932 in memory and flash lamp fault code (LFC) 19 (or higher priority code if one exist) on the air bag indicator.