Test U: Right PRETENSIONER Circuit Resistance Low Or High (DTC B1881/B1886): Description
WARNING: This page is about a different car, the 2002 Mazda B4000, 2002 Mazda B3000, and 2002 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.
Restraints Control Module (RCM) monitors resistance on right seat belt pretensioner circuits. If RCM detects resistance that is out of expected range, it will store Diagnostic Trouble Code (DTC) B1881 or 1886 in memory and flash Code 47 on AIR BAG warning light.