The fact that it says "No BUS" probably answers the question - there is a fault on the CAN BUS network. All the little computers in the jeep (about 20) communicate with each other via a serial BUS network called Controller Area Network BUS (CAN BUS). If, for example, the 2 wires were pulled out of the ignition/key module, then the engine module would not get the command to shutdown. The CAN BUS has one master (the TIPM) and everything else is a slave. So, could be a faulty TIPM. If you're not getting dash lights, headlight not working? windows don't work? things like this, that would indicate that the entire network is down and that the problem is with the master.
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