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1995 John Deere 490E PVC and EC Not Communicating

Price

Well-Known Member
Joined
Jul 30, 2015
Messages
81
Location
Mississippi
I have replaced both the EC and PVC within 1 month of each other. The only codes I have are 27 coming from EC, which I don’t see in my manual, and code 20 from PVC which shows the two are not communicating. I checked the harness between the EC and PVC and it checked good. Nothing has been plugged or unplugged while key is on.

The only other problem I know of is the engine control motor is not working and the lights on the switch panel for the motor are not selectable. The “P” mode light is on but I can not select any of the other three.

If I just need to ignore these codes and move on that’s fine but I would like to hear that from someone with experience on these machines vs me just ignoring it when there is a fix.

Thanks
 
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