Mx5200 elec issues

[tgarber22]

Came out to start the tractor and dash boars lights started flashing weird and won't start. Hydrostatic. Batter shows green indicator(good). Lots of voltage.
Battery leads tested for connection ground no resistance. See if I can post a video here to show my issue. Any help would be appreciated. Link below is Google photo s video showing the dash flickering. Have a WSM now thx to this forum and trying to work through those but if anyone has seen this before that would be a good start

New video by james AC

photos.app.goo.gl

 

[Dave_eng]

What is the noise in the background in your video.
When you say wont start you need to be more specific such as wont crank, cranks but wont fire.
Do you know how to jump your starter?
Dave

 

[tgarber22]

The noise is the leaf blower.
Tried jumping but with screw driver between battery terminal and starter engager thing (wrong name). No luck
Now p0605 error and is cranking but won't start. Reading some p0605 threads and sounds like I may be in deep trouble.
Thx for reply

 

[tgarber22]

The noise is the leaf blower.
Tried jumping but with screw driver between battery terminal and starter engager thing (wrong name). No luck
Now p0605 error and is cranking but won't start. Reading some p0605 threads and sounds like I may be in deep trouble.
Thx for reply

Oh I did replace battery as that was the first problem. No longer getting this wonky lights on the dash

 

[tgarber22]

Update. Took the tractor into a dealer that plugged in and ECU that was good But still had the P605 Error. He pulled out his multimedia and did a few checks said I wasn't getting power to the ECU and suggested if I'm finding it myself to just replace the harness. I brought it back home and dug in a little deeper and found a mouse nest on top of the engine. Taking everything apart though I found no issues where mice had been eating into the wire harness. I do have pwr to pin 50 on the ecu connector pin. Another thread here talks about getting power to the 4 and 6 pin but I do not measure power there with the ECU disconnected and key switch on. Starter and engine relays are good. Any ideas on next thing to look for?

 

[North Idaho Wolfman]

Update. Took the tractor into a dealer that plugged in and ECU that was good But still had the P605 Error. He pulled out his multimedia and did a few checks said I wasn't getting power to the ECU and suggested if I'm finding it myself to just replace the harness. I brought it back home and dug in a little deeper and found a mouse nest on top of the engine. Taking everything apart though I found no issues where mice had been eating into the wire harness. I do have pwr to pin 50 on the ecu connector pin. Another thread here talks about getting power to the 4 and 6 pin but I do not measure power there with the ECU disconnected and key switch on. Starter and engine relays are good. Any ideas on next thing to look for?

One note on not getting power:
Everyone always focuses on the + Positive connections and forgets to test -Negative connections.
Don't know if it applies or not but thought I would bring it up.

 

[tgarber22]

One note on not getting power:
Everyone always focuses on the + Positive connections and forgets to test -Negative connections.
Don't know if it applies or not but thought I would bring it up.

Thanks for the reply. I did check resistance to battery neg on the connector and got no resistance

 

[North Idaho Wolfman]

Thanks for the reply. I did check resistance to battery neg on the connector and got no resistance

No resistance or Infinite resistance?
Just for clarity, use a volt meter or test light go from hot on the battery to the the -Neg connection on the connector.
I've seen several connections that OHM out at 0 resistance then under any load they fail to connect.

 

[tgarber22]

No resistance or Infinite resistance?
Just for clarity, use a volt meter or test light go from hot on the battery to the the -Neg connection on the connector.
I've seen several connections that OHM out at 0 resistance then under any load they fail to connect.

Test light illuminates on both.

 

[JerryMT]

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[JerryMT]

Is the fuel solenoid working to allow fuel flow to the IP? If it isn't, then all the cranking in the world won't start it.

 

[tgarber22]

In getting fuel moving through the pump. Spilled everywhere when I turned key on a the tank was off and recirc. Line was open...

On another note this test failed. Now I need to find out why. Any ideas? Wire harness?

 

[North Idaho Wolfman]

Your going to have to study the wiring diagram and figure out where it's getting it's power from and find out if that part is getting power to it, most likely a relay.

 

[tgarber22]

Your going to have to study the wiring diagram and figure out where it's getting it's power from and find out if that part is getting power to it, most likely a relay.

Relay checked out and I realized I had my cpu not connected. Might need to try again tomorrow when my head is a little clearer.

 

[North Idaho Wolfman]

Relay checked out and I realized I had my cpu not connected. Might need to try again tomorrow when my head is a little clearer.

That will do it!

 

[JerryMT]

In getting fuel moving through the pump. Spilled everywhere when I turned key on a the tank was off and recirc. Line was open...

On another note this test failed. Now I need to find out why. Any ideas? Wire harness?

Check the chasis ground. If the ground is missing, you won't measure any voltage.

 

[tgarber22]

Well it turned out to be a replacement of the wire harness and the ECU. And my pocket book is$3,700 lighter. I did do it all my self though and had a great dealership that tested a known good ecu on my trailered tractor before I put down the big money for the ECU. Hopefully kubota will figure out what's causing this and remedy it. Based on my experience and the stories I've read there seems to be a correlation to the battery dying or the battery swap. Hope this helps someone

 

[ntses.ya]

Well it turned out to be a replacement of the wire harness and the ECU. And my pocket book is$3,700 lighter. I did do it all my self though and had a great dealership that tested a known good ecu on my trailered tractor before I put down the big money for the ECU. Hopefully kubota will figure out what's causing this and remedy it. Based on my experience and the stories I've read there seems to be a correlation to the battery dying or the battery swap. Hope this helps someone

Hello. When you said you did it yourself, did you replace the ECU and harness by yourself? If so, is it just taking the bad ECU out and putting in the new one?