John Deere 6620 electric problem

[Yazzie]

I wonder if anyone could help wth engine that now derates to idle after a couple of minutes from start. This started after connection on battery that goes to 80 amp fuses came apart.
Got engine speed derate and and set-up error in BCU trouble codes.
Thanks in advance for any help.

 

[Tractortech]

Now Then..
Are there any codes in the ECU?? Pop all codes on here, I'll look later or tomorrow, eh..

 

[Yazzie]

Thanks, I will look tomorrow morning and post what I can find.

 

[Timbo]

Until we get more info, im not going to say much, but so far, it appears that the bcu firmware is corrupt

 

[Yazzie]

Hi
The codes we can find now are
Ecu 000189.00 engine speed derate
Ecu 002000.13 set-up error in BCU
BCU 302123.31 switch signal from foreword or reverse travel does not match
These are all I can find
Thanks

 

[Yazzie]

Forgot to add tractor is very early 02 model with vp44 pump

 

[Tractortech]

Now Then..
Looking through the tech manual there are some settings to check within the control units.. Does the engine speed register on the rev counter?? You may also have a CAN Bus issue....

 

[Yazzie]

Yes rev counter works perfectly.

 

[Tractortech]

Do you have an actual JD dealer to hand??

 

[Yazzie]

Had mechanic out today and turns out to be Ecu problem. Security breech of some kind.

 

[Timbo]

Did mechanic make any mention of reflashing the ecu & bcu ???

 

[Yazzie]

Jd dealer coming tomorrow to try that. Fingers crossed.