L5460 goes to max RPM & no throttle control after error 20 fuse replacement

[PPCAV8R]

I have a Kubota L5460 and was working some brush when the engine died suddenly and I got an error code 20. The transmission controller fuse was blown so I replaced it and got the tractor to start, but now I have no throttle control and the engine goes to max RPM upon starting and stays there. I think the likely cause is that I took a limb hit on a wire plug somewhere underneath, but I can't seem to locate it (it's REALLY tight quarters under there!). Does anyone happen to know which connector may be involved and where it is located?

Update: Fired up the tractor and repositioned it for easier access and now on later starts I'm back to the error 20 again.

Many thanks in advance.

 

[RjCorazza]

The WSM says error code 20 is "Communication error between ECU and IntelliPanel".
The diagram shows 2 wires (Brown and Brown & white) between the ECU and panel.
I would start looking for a separated connector where brush may have caused damage.
In the clipped image, 9 is the ECU and 3 is the intellipanel.
Hope this helps. I have a vague recollection of a very similar topic here on tbn recently... A thorough search may find something.

 

[PPCAV8R]

The WSM says error code 20 is "Communication error between ECU and IntelliPanel".
The diagram shows 2 wires (Brown and Brown & white) between the ECU and panel.
I would start looking for a separated connector where brush may have caused damage.
In the clipped image, 9 is the ECU and 3 is the intellipanel.
Hope this helps. I have a vague recollection of a very similar topic here on tbn recently... A thorough search may find something.

Thanks a lot, I've been under there digging and haven't found anything yet. I'll try again tomorrow.

 

[RjCorazza]

Thanks a lot, I've been under there digging and haven't found anything yet. I'll try again tomorrow.

The topic I recall included where the connector was on the tractor, and I'm pretty sure it was an L60 series with the same error code.
Definitely try searching here for the topic.

 

[RjCorazza]

Here's the thread I saw, but it was about the L40 series.
Worth the read...
Error 20 ?

 

[PPCAV8R]

The topic I recall included where the connector was on the tractor, and I'm pretty sure it was an L60 series with the same error code.
Definitely try searching here for the topic.

Thanks, yep, I did search the topic and found the thread you mentioned. I was hoping to see a very specific location or photo for the connector in question, but didn't see that in the thread which is why I asked here.

Back to crawling under the tractor now LOL!

 

[PPCAV8R]

Checked 4 electrical plugs that I could see on the right side of the transmission housing and all looked good. No obvious broken wires or plugs.

 

[PPCAV8R]

Anyone know where the ECU is located on an L5460?

 

[RjCorazza]

Main ECU is inside the squared off plastic coming out of the floor board under the steering wheel. I can't see my own attachment.
The Engine ECU (not mentioned for error 20) is under the seat. I got confused with the two when searching.

View attachment 691347

 

[RjCorazza]

Deleted.

 

[PPCAV8R]

I did manage to download a shop manual and now can see where everything is located. I have searched far and wide and don't see any signs of any connector damage anywhere. I did replace the transmission controller battery a bit ago and it did run long enough to at least let me raise the loader in case I have to transport it for service. Same symptoms as before when it started....goes to full throttle and there is no throttle control. Wondering if I have a bad ECU at this point.

 

[jonsstihl]

perhaps your dealer would let you crawl around under one of theirs so you could maybe spot some differences. sometimes nothing looks out of place until you realise thats not where the sensor goes. I would also check under the hood since you mention no throttle control. does the 60 series still have a throttle cable??