ECU Downloads and Interpretation

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It looks like you have a loose connection in the CAN BUS wiring.
Engine OFF; you should measure 60 OHMS across the two CAN wires.

The eTPU Synchronization Errors relate to the Crankshaft Position Sensor. ( Enhanced Time Processing Unit)

Both of these signals connect to the ECU on the same connector.
Check that the large connectors on the ECU module are secure.

Thanks, Bill.  I've looked through the Heavy Maintenance Manual, which is where I would expect to find a pin out for the HIC connectors, but no luck.  Can you point me to the correct reference document to find this?

Thanks again.

Bob

The User end of the HIC Connector is in the Installation Manual. (Chapter 24-00-00, Page 22)  (CAN Bus)
The ECU ends (A1,A2,B) are not documented anywhere that I know of. (Crank Position Sensor). Sucks!
You can check the CAN BUS on the HIC Connector but the problem is more likely on the ECU Connector End.
Be sure to have a look at the Crank Sensor connections before you get too far into it.

This looks like a Reverse Engineering Job.
A little tedious, but if you work a plan, it should be doable in a few hours. (<100 wires)

Thanks, Bill.  Looks like I’ve got more research to do.  Any value in clearing the faults and seeing how the log looks after another flight?