Test D: Passenger Air Bag Circuit Failure (DTC B1920): Description
WARNING: This page is about a different car, the 2003 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
Electronic Crash Sensor (ECS) module monitors voltage on ECS module connector terminals No. 14 (circuit No. 607, Light Blue/Orange wire) and No. 28 (circuit No. 616, Pink/Black wire). If ECS module detects short to ground or battery at either terminal, it will store Diagnostic Trouble Code (DTC) B1920 in memory and flash Code 16 on AIR BAG warning light.