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 2002 Ford Pickup, 2002 Ford F550 Super Duty, 2002 Ford F450 Super Duty, 2002 Ford Excursion, and 2002 Ford Cab & Chassis. 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.