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Kevin, Technician
Category: Agriculture and Farm Equipment
Satisfied Customers: 732
Experience:  Over ten years of expirence in Ag Electronics and Hydraulics
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I have jd8400t well jump forward and reverse put instantly

Customer Question

I have jd8400t well jump forward and reverse put instantly jumps back in to neutral code 50 when lever is engaged f or r
Submitted: 1 year ago.
Category: Agriculture and Farm Equipment
Customer: replied 1 year ago.
I have already replaced g speed sensor p#re295936 no change checked wires
Expert:  Kevin replied 1 year ago.

Hello, my name is ***** ***** I would like you help you with your questions.

Could you tell me if it is a PCU or CCU 50 code?



Customer: replied 1 year ago.
PCU 50
Customer: replied 1 year ago.
Get back to me asap thanks
Customer: replied 1 year ago.
Hello any body out there
Expert:  Kevin replied 1 year ago.

My apologies for the delayed response.

PCU 50 indicates that the transmission controller commanded to be put in gear with the engine off. Generally this code indicates that one of two items have failed, either the engine crank position sensor or one or the V1 or V2 diodes. The engine speed sensor is the easiest to rule out, if engine speed is displayed on the corner post then the speed sensor is not the problem. If the corner post reads zero then replace the crank position sensor.

The V1 and V2 diodes are located below the fuse panel behind the upholstery with the relays. Original V1 and V2 diodes will be slightly taller black boxes similar to the relays. If the diodes have been replaced already they will be shorter in profile with removal handles on top. You can swap the diodes, most of the time you will gain one function but loose another. This will allow you to diagnose if the diodes have failed.

If you are still having trouble please let me know.