Usually the non communication problem is because one or more of the computers are not powering up. They is several relays that must activate to achieve this. Here are some guides and the complete engine and battery wiring so you can do some testing.
Make sure you stay away from the high voltage portion of the system (large wires). If your not sure don't go any further.
Here are the complete wiring diagrams for the engine and batteries for your car (below).
As you can see there are many relays and a circuit breaker that could be causing the problem.
Please let us know what happens, we are interested to see what it is.
Images (Click to enlarge)
Thursday, June 22nd, 2017 AT 3:51 PM