John Deere 872D shutting down intermittently

[JAJ]

Hi hoping someone might be able to offer some advice. I am helping someone (over the phone at this stage) with a John Deere 872D. Serial number: DW872DX6136799.
Apparently it has been shutting its self down intermittently, some times it will re start other times not straight away. The mechanics that are looking at it said it only has one active code on the in cab monitor… ECU1348.05
Which I think is “pump control valve #2 error. Open or short in control valve 2 wiring.”
They said they have checked the wiring loom for continuity and it all seams to be good.
Would this fault code cause the machine to shut off?
I am thinking I might try and help by having a look but I am not familiar with John Deere equipment at all. I have some manuals but not sure if they are exactly the ones needed and they seem a bit harder to follow than cat ones.
Any help or advice is greatly appreciated!!!
Thanks

 

[mg2361]

They said they have checked the wiring loom for continuity and it all seams to be good.

Intermittent opens can be tricky to find sometimes.

That code is for an open circuit. it will not shut the engine down, however, if running under load, then the open occurs, it could shut the engine down because of the load, not by the ECU.

DW872DX6136799

Incorrect. Please supply the correct serial number.

 

[JAJ]

Intermittent opens can be tricky to find sometimes.

That code is for an open circuit. it will not shut the engine down, however, if running under load, then the open occurs, it could shut the engine down because of the load, not by the ECU.


Incorrect. Please supply the correct serial number.

Thank you very much for your reply.

My apologies about the serial number, I am sure that is what I wrote down when I was talking to them. They were going to send a picture of it but haven’t done so! If I can I’ll confirm that with them and find out what I got wrong. What do you think might I have got wrong… too many digits?

It sounded like it might have been doing it under load so that would make sense with the load stalling it. I wouldn’t have thought it would have been causing an ECM commanded shut down but I have never had anything to do with John Deere electric equipment before. Almost purchased a 770Gp grader a few months ago but that’s it.

They did say it had other logged codes but this was the only active one. They were going to send me the list and I haven’t seen that yet either.

I have been thinking about it while typing… they said they swapped a fuel pressure sender (I think) and the owner then operated it for three hours and no problem. If the code was “Active” and it is an open circuit it would be having issues while it was active. If it wasn’t…. I wonder if they caused it to be active when the were testing the loom and it isn’t active any more. They said they were way out of their depth on anything this computerised so who knows!!!! I’ll try and get more info and post it.

Thanks again.

 

[JAJ]

Just as a side note on the intermittent opens can be tricky to find… they said it tested good with continuity, but I did ask about and suggest they load test the wires in question with a light globe (or something else to draw some current) to see if the resistance built up. If I end up looking at it do you have any effective tricks for finding annoying intermittent opens?

 

[mg2361]

too many digits?

Yes

do you have any effective tricks for finding annoying intermittent opens?

Wiggle testing the harness with an ohm meter, or I will load test wires with a light bulb and wiggle harnesses everywhere. Pay particular attention to areas where the harness goes around corners, through "P" clamps, etc.

 

[Pickawinna]

Is it an electrical lockout when it shuts down or is the engine winding over but not firing?

 

[JAJ]

Yes


Wiggle testing the harness with an ohm meter, or I will load test wires with a light bulb and wiggle harnesses everywhere. Pay particular attention to areas where the harness goes around corners, through "P" clamps, etc.

I wonder if we drop the last digit would it be better? The last 2 digits were the same on what I wrote down, I wonder if it’s a double up.

They said they wiggle tested with an ohms meter and also couldn’t find any rubbing ect, but without checking myself it’s only really anecdotal evidence.

I have missed a couple calls from them and can’t seem to catch them on the phone so I’ll post updates when I have more.
Thanks

 

[JAJ]

Is it an electrical lockout when it shuts down or is the engine winding over but not firing?

When I started asking too many questions they weren't real sure and were going to double check with the owner. They weren’t even 100% sure if everything in the cab shut off at the same time or just the engine. So the whole issue might not even be related to the Active code.

I know the owner, he’s only one property away from us, so almost next door. I haven’t had anything to do with the mechanics before, I only got involved as a favour for the owner.
I think the mechanics were heading home this morning so I will get in contact with the owner and see what is going on.
When I get some spare time it might be a good excuse to try out a 6wheel drive grader and see for myself!