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Here in lies the problem. i had to replasce the ecu. kubota has discontinued the ECU that came with the tractor and they want $2400 + for a new one . So i bought one off ebay for $1700 . 30 day guarantee . in order to check the wiring , looks like i need to pull the exaust system , fuel tank...

regaurdless of the garage kept, seriously well maintaind , washed and waxed care ive taken of this L 3901, it continued to be the biggest piece of shit i have ever owned. Kubota discontinued the ecu for this model. I wonder why? $2400.00 later, this piece of shit haqs 0202 code for no reasion...

I understand and you are right. I dont have a way to load it right now. Ill need another tractor to do so.

Right. Ok will do tomorrow and thank you for your help.

Does anyone have a pin diagram for the ecu?

The ECU is not providing a ground to the relay. I jumped a ground to it and the fuel pump came on . i tried to crank it but it will not fire. Does the ECu send its signal to the injectors individually?

As far as the safety switches< hst,pto, clutch , brajke, ect, seem to be working because it will spin over or not depending on the switch on or off and i checked them individually. I am trying to be as precise as possible as wiring is a nightmare to me. i understand it mostly but i can never be...

The ecu is not trying to trigger the relay. i checked all the connections from the ecu ect,. I'm pretty sure it is in the ecu. would this be a programming issue? how can this be fixed? is the ecu bad and need replaced or fixed? I was told that the ecu has to be reprogrammed while on the...

Ok my new Orange friends, I tested the relays and found that I was not getting a ground signal from the ECU to the the relay for pressure pump and fuel switch solenoid. So i jumped the ground to the relay and the pump came on and the solenoid had power. Unfortunately, it would not start...

How do I check for the ground from the ecu?

So if I manually jumped the shutoff solenoid and the fuel pump should it start?

I am only getting the letter A and it is 2017 HST with 900 hrs

I followed the instructions exactly and I get back the letter [A] I know that the problem is most likely operator error . What does this mean?

LOL, Thanks for the spell check! At this point i am so frustrated with this machine.

i have no power to the fuel pump. nor the the fuel shut off solenoid . or what i think is the fuel shutoff. it seems that some kind of switch somewhere is not allowing power to the fuel system. if that makes any sense. i need a wiring diagram of fuel system. is there some kind of sensor that...

Kabeta l 3901 won't start . the ignition was screwed up when it was almost stolen. the key still worked somewhat for a while then it started to throw codes . i replaced the ignition switch and cleared all codes except 2. i removed the ecu for about 60 days and then re installed it happily to...