D9t trouble shoot emissions

I bought a d9t s/n Rex 00379 wood chip dozer
Real nice tractor its had Cat certified rebuild came off lease and the owner-bank put it up for sale. Its just sat around doing nothing for 2 years it last pushed wood chips around March 2020 and parked up until it was moved to a storage facility.
They hired the Cat Dealer to see why it was having emission codes and alarms going off this was August 2020 in which it had dead batteries, Cat report say they had to jump start it back in August 2020 in order to check out what was wrong.
Under a lease and getting close to the end of the lease I'm guessing they let the emissions system Def and diesel particulate filter system run out of service the Ard was changed actually the whole emission system was removed rebuilt and new reman particulate filter installed Cat says every 5000 hrs change filter. Also in the report it says they had a rusty spliced barbed connection on the Def line from the tank to the injector where the line must broke. They changed that drained the Def tank installed new Def got everything working correctly according to the report and tractor was running well with no faults or alarms cost $13,000 for the total repair
I went ahead and bought tractor with faith in all the Cat records on it so I did not drive 1000 miles to go see it. They had to get it started in order for me to buy it, but they could not get it to jump start this time (batteries they did not want to spend any more).
It had to run and work/drive so I agreed to buy batteries, it also got a new starter they paid for that.
Probably they burnt starter up from jumping it or rusted up from sitting. They hired Cat Dealer to install batteries and starter and it started right up sent me a Video of it driving and going thru the gears moving around a bit ect. But it had a code showing they would not pay Cat to dig deeper into it. funny its never been used since the whole system was rebuilt and all codes and fault/Buzzers were gone tractor running great according to the Cat report
I received the tractor this past week its got the alarm exclamation point light buzzer sounding off and a code
here is what I see on the computer screen.
3 stars Def %
Emission Fault 1/5
e1389 v
2348-9 (2)
2466-9
Engine is in derate pretty sure now has no high rpm from de'accelerator
Is this something I can correct myself or ? the D9T has maybe 6 hrs on it since Cat repaired emission system Aug 2020

Can you post a photo of what you see on the screen. Makes things easier to visualize.

One question that always comes up is whether or not the DEF is fresh or has been in the tank for a while now.

With a TIER 4 machine the one thing you really need is an Operation & Maintenance Manual so that you know what the messages on screen are telling you.

fiat41b said:

e1389 v
2348-9 (2)
2466-9

Click to expand...

E1389 is operator warning for a regen. This code is a Level 3 inducement associated with an emissions system fault. The engine is derated 100%, limited to low idle or 1000 RPM, and can experience 5 minute rolling shutdowns.

2348-9 is a Datalink issue, not updating correctly.
2466-9 is the Aftertreament module datalink not updating correctly.

The cause of the E1389 event is directly related to both of those datalink codes. Basically the engine ECM is not seeing the aftertreatment ECM on the datalink. There was a software update in 2018 to correct the 2348-9 code though it may already be installed. As for the DEF quality, It wouldn’t cause these codes as this machine was not shipped with a DEF quality sensor in the DEF header. If your problem persists, you are going to need to follow the troubleshooting for code 2466-9 which involves checking the wiring and voltage values on the CAN B circuit. It is possible that once corrected, the machine would clear the operator inducement code on its own but it could also require intervention with Cat ET to perform an Aftertreatment System Functional test which basically proves to the ECM that you have corrected the issue and machine is repaired.

Nige said:

E1389 is operator warning for a regen. This code is a Level 3 inducement associated with an emissions system fault. The engine is derated 100%, limited to low idle or 1000 RPM, and can experience 5 minute rolling shutdowns.

2348-9 is a Datalink issue, not updating correctly.
2466-9 is the Aftertreament module datalink not updating correctly.

Click to expand...

OK as soon as i get back down to my job i will get back with photo of the screen info thank you

ahart said:

The cause of the E1389 event is directly related to both of those datalink codes. Basically the engine ECM is not seeing the aftertreatment ECM on the datalink. There was a software update in 2018 to correct the 2348-9 code though it may already be installed. As for the DEF quality, It wouldn’t cause these codes as this machine was not shipped with a DEF quality sensor in the DEF header. If your problem persists, you are going to need to follow the troubleshooting for code 2466-9 which involves checking the wiring and voltage values on the CAN B circuit. It is possible that once corrected, the machine would clear the operator inducement code on its own but it could also require intervention with Cat ET to perform an Aftertreatment System Functional test which basically proves to the ECM that you have corrected the issue and machine is repaired.

Click to expand...

OK that's some great info I'm new to this modern technology like I told Niege I will send a pic of the screen info when I return to the machine

From ahart's reply above the test for the 2466-09 (Engine Aftertreatment Control: Abnormal Update) is the CAN Data Link Test. I attach it here. You can at least do the tests of the connections. From the information that the machine was parked for 2 years it is possible there is a connection somewhere with condensation or corrosion in it.

From a brief look at the procedure, apart from the basics, it might be the case you have to get the dealer involved. Too many things that have to be tested with ET.

That’s correct nige, once you get DEF involved, there’s not much you can do without ET and very commonly factory passwords are required. Emissions systems are irritating but I’ve probably paid for my house working on them over the past 10 years.

Nige, Ahart I just notice you guys posted more info thank you very helpful
should be back at the d9t this coming week

Not familiar with CAN systems on equipment, but with automotive yes. Many times the problems can be from corroded connector terminals, or loose fitting connectors, not plugged in all the way or even bent terminals.
Automotive CAN systems have 2 terminating resistors of 120 ohms, it is sort of a quick check to see if the CAN system has continuity of sorts to check for those resistors. The correct meter reading if they are both online is 60 ohms since they are in parallel, the test is best done with no power on though some do it with the system asleep. Of course that check does not prove if the networked modules have proper power and signals from the sensors that connect to them. To help in trouble shooting those CAN systems an oscilloscope is an important tool, if the wave form is messed up, then systematically unplugging then replugging modules to find the offending module helps in diagnostics process.
So on Cat machines do they have the High and Low speed CAN at the diagnostic connector or plug that the scanner system connects to? I would think so.