Test U: Left Side Air Bag Circuit Short To Battery Or Ignition (DTC B1992): Description
WARNING: This page is about a different car, the 2004 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
Restraints Control Module (RCM) checks left side air bag module circuit for shorts to battery or ignition by monitoring voltage at RCM harness connector C2041B, terminals No. 2 (White/Light Blue wire) and No. 3 (Brown/Light Blue wire). If RCM detects battery or ignition voltage, it will store Diagnostic Trouble Code (DTC) B1992 in memory and flash Code 36 on AIR BAG warning light.