looking for abit of help from the wizards. Im working on a 850j john deer dozer and it got a fault im chasing in circles!!! previously it had a lot of fault codes and canbus related fault codes that turned out to be a failed ECU due to corrsion, fitted a new ECU and programmed it to the machine and all thos fault codes resolved themselves. But now after 20 hours of running it has fault code 190.9 CAN comm No engine speed, its intermitted and everthing seems to test okay, all canbus terminating resisters are testing okay and from what i can see the wires seem to be intact. i do have a trans pressure bypass fault to the TCU but thats the solenoid im waiting for, but this 190.9 code dissables the machine. Any help appreciated or even a wiring diagram would be helpful
And the first thing that the JD experts will want to know is - Serial Number..........