Test G: Left PRETENSIONER Circuit Short To Ground (DTC B1879): Description
WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
Restraints Control Module (RCM) monitors circuits to left seat belt pretensioner. When RCM detects a circuit short to ground, it will store Diagnostic Trouble Code (DTC) B1879 in memory and flash Code 17 on AIR BAG warning light.