Test B: Air Bag Warning Light Circuit Open Or Short To Ground (DTC B1869): Description
WARNING: This page is about a different car, the 2003 Mercury Sable and 2003 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
AIR BAG warning light is designed to illuminate for 6 seconds when ignition switch is turned to RUN position. The initial 6 second illumination is normal and is called prove-out. AIR BAG warning light is then used to warn that there is a fault in the air bag system.
Restraints Control Module (RCM) monitors AIR BAG warning light for open and short to ground conditions. If RCM detects open or short to ground in AIR BAG warning light circuit, it will store DTC B1869 in memory. If RCM detects AIR BAG warning light failure in addition to another air bag system failure, the secondary air bag warning system will be activated.