Test N: Passenger-Side Air Bag Deactivation (Pad) Warning Light Short To Battery (DTC B1890): 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) has ability to deactivate passenger-side air bag under certain conditions. When passenger-side air bag is deactivated, PAD switch warning light will be illuminated.
RCM monitors PAD switch warning light for short to battery conditions. If RCM detects a short to battery in PAD switch warning light circuit, it will store Diagnostic Trouble Code (DTC) B1890 in memory and flash Code 27 on AIR BAG warning light.