One quick check of the CAN BUS is to back probe the C4 connector on the PCM at pins 1 and 11 - if you measure 60 ohms, your CAN BUS C is okay. Here's a link to a no crank issue caused by a CAN BUS failure
-Jerry
no crank, black rectangel/square in the IC - CrossfireForum - The Chrysler Crossfire and SRT6 Resource