Test N: Left Side Crash Sensor Communication Fault (DTC U2017): Description
WARNING: This page is about a different car, the 2002 Lincoln Blackwood. However, it is still accessible from the selected car via links, so may be relevant.
RCM monitors left side crash sensor circuit loop for signal that is out of range. If RCM detects signal that is out of range, indicating communication fault, it will store Diagnostic Trouble Code (DTC) U2017 in memory and flash Code 44 on AIR BAG warning light.