Normal Operation
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
When the ignition is in the ON position, the passenger air bag deactivation (PAD) indicator prove-out period is initiated by the RCM. The RCM briefly activates the PAD indicator to verify to the occupants proper functional operation of the PAD indicator. Refer to AIR BAG AND SAFETY BELT PRETENSIONER SUPPLEMENTAL RESTRAINT SYSTEM (SRS) .
If the restraints control module detects a short to battery on the PAD warning lamp circuit, it will store diagnostic trouble code (DTC) B1890 in memory and flash lamp fault (LFC) 18 (or higher priority code if one exists) on the air bag indicator.