Test B: RCM Internal Fault (DTC B1342): Description
WARNING: This page is about a different car, the 2003 Mazda Tribute. However, it is still accessible from the selected car via links, so may be relevant.
Restraints Control Module (RCM) monitors back-up power supply, accelerometer operation and memory. If RCM detects a failure in these components, it will store Diagnostic Trouble Code (DTC) B1342 in memory and flash Code 24 on AIR BAG warning light.