Sit Rep: Still Stuck

[Samarath]

Originally Posted by headdownlow0624

Isn't yours a 2006? That book is not accurate for 2006. Reference EGES295-2. But yes, your thumbnail posts are visible.

I have the 295, but it says to refer to the 240 for diagnosis. The 295 tells me how to install and uninstall parts/sensors/etc, but gives me no actual diagnostic procedures nor electrical circuit diagrams. I'll double check, but even my operator's manual says to reference the eges-240 for diagnosis and 295 for service.. I feel like there must be a more up to date revision of the same book, but I can't find it online. I am calling the dealership today.

[Samarath]

Would it harm anything to unplug x1 from the ecm and turn the key on? I am curious to see if the duty cycle for the turbo changes. As it is, unplugging the turbo solenoid doesn't effect the duty cycle reading on ServiceMaxx.

[headdownlow0624]

If you unplug the X1 connector and turn the key on, I do not know what will happen. It's possible the ECM won't wake up, if it gets power through the same connector. I don't understand what unplugging it will gain you. The duty cycle % reading from ServiceMaxx is getting the information from the ECM itself, because it is the ECM which is controlling your VGT actuator. You're seeing the "output" from the ECM to the actuator. If you unplug anything on the circuit and recheck, then you may to see a difference, due to the self-diagnostics of the ECM realizing there is not a complete circuit anymore.

[headdownlow0624]

If you suspect a short to B+, (with the key off) unplug the VGT actuator and check for voltage between the pin (in the connector, on the harness) and ground. May as well check both pins. Then switch over to resistance and check both pins to ground.

[headdownlow0624]

I think it's ridiculous that the book allows 5ohms of resistance for a circuit. Most automotive manufacturers specify half an ohm of resistance in any circuit as maximum.

[Samarath]

Bought a gas powered generator to put a charger on the bus batteries and our electronics. The International dealership wasn't very helpful with the diagnostic manual info. Most of their stuff is digital now I guess. I've retested the EBP and MAP sensor wiring and will continue when the bus batteries have a better charge. Also with key off, there was no voltage at any pin of the vgt solenoid.

[Samarath]

It was so windy that I didn't get much done under the hood today. Has anyone used Navistar OnCommand Service info USB flash drive? Is it a subscription, or is 583$ the lifetime total? It is crazy to think of spending so much, but I am not doing so well shooting from the hip.

[headdownlow0624]

Originally Posted by Samarath

Also with key off, there was no voltage at any pin of the vgt solenoid.

Good. Sounds to me like the circuit is good.

I have no experience with that flash drive.

[cadillackid]

I have an OnCommand set from 2014 and it seems to be a full-ingrained WIndows solution.. it uses an image displayer ive not heard of.. i find it cumbersome to use unless im on a 36 inch monitor.. some ofthe info is good and complete.. others not.. there are some PDF's, I can see if the PDF you need is in it.. are you looking for EGES-295-2?



if you want the whole thing I can probably put it up on MEga or something but its way too long to email or attach to a forum post.. maybe I can share it through one of my cloud storages like icloud, onedrive, google, etc?


so im a bit lost in this thread. but one wuestion i had was does the engine run correctly and make boost when its cold? until the oil temp gets real high? if it does, is it possible that a clogged oil cooler is causing the whole issue? as soon as oil temp reaches a point i know the computer de-rates.. this was done on the later ECM's after people incurred "melt-downs" of the oil filter standpipe on earlier units..

[Samarath]

Originally Posted by cadillackid

I have an OnCommand set from 2014 and it seems to be a full-ingrained WIndows solution.. it uses an image displayer ive not heard of.. i find it cumbersome to use unless im on a 36 inch monitor.. some ofthe info is good and complete.. others not.. there are some PDF's, I can see if the PDF you need is in it.. are you looking for EGES-295-2?



if you want the whole thing I can probably put it up on MEga or something but its way too long to email or attach to a forum post.. maybe I can share it through one of my cloud storages like icloud, onedrive, google, etc?


so im a bit lost in this thread. but one wuestion i had was does the engine run correctly and make boost when its cold? until the oil temp gets real high? if it does, is it possible that a clogged oil cooler is causing the whole issue? as soon as oil temp reaches a point i know the computer de-rates.. this was done on the later ECM's after people incurred "melt-downs" of the oil filter standpipe on earlier units..

The eges-240 that I have is for 2002, and it seems as though there is an edition that covers up to 06. EGES-240 Engine Diagnostic Manual. I would also benefit from any wiring diagrams that maybe available.

Vin# 4DRBUAFP07B427163

I have the eges-295-2 which is the service manual. I truly appreciate anything pertinent that you can find. Also, maybe ELECTRONIC CONTROL SYSTEM DIAGNOSTICS
– EGED 255

The engine seems to run fine. At lower speeds/load, it does well, but the turbo not opening to accommodate anything above that gives me excessive EBP before I get through second gear. I know this is hard on the engine and I imagine that I need to service/bulletproof the trouble areas, but my turbo Duty Cycle is stuck from KOEO through all ranges of operation, and I think that it is a separate issue. Did I mention that with the KOEO standard test, I get DTC 224 SPN 254 FMI 2 FLASH MEM FAULT? That lead me to cutting out the 3 prong plug in the battery box and splicing it with butt connectors and heat shrink. Maybe it all stems from that.

[Samarath]

There I was back probing x3-3 when the alligator clip touched a heat shield. Now there is no communication with the ECM. I guess it's pretty easy to diagnose the fried ECM based on my observations....lol

Thanks for all the help and we'll let you know how things turn out.

[joeblack5]

Sorry to hear about all your trouble. Do you know what wire you shorted out? Specifically a 5 volt line for a sensor or a control ( output ) line to an actuator.
If it is a 5 volt line then check if other 5 volt locations have gone down as well.. in that case you can try to replace the regulator inside the ecm.

On the otherhand,...I might have access to a vt365 ecm at the local scrapyard, haven't been there for a while so I would have to check if it has not been cut out yet

[Samarath]

Originally Posted by joeblack5

Sorry to hear about all your trouble. Do you know what wire you shorted out? Specifically a 5 volt line for a sensor or a control ( output ) line to an actuator.
If it is a 5 volt line then check if other 5 volt locations have gone down as well.. in that case you can try to replace the regulator inside the ecm.

On the otherhand,...I might have access to a vt365 ecm at the local scrapyard, haven't been there for a while so I would have to check if it has not been cut out yet

Thanks so much for your attention. I shorted the B+ feed from the relay to the ecm. I had the alligator clip on a sewing needle out the back of the ECM harness and while I was climbing up, the clip rotated down into a bracket holding a line from the air compressor. Servicemaxx doesn't see an engine now. I am certainly interested in the salvaged ECM. It is kind of a confusing situation to make sure I am getting the right part. 1839368c2 is the part# on my ECM. There looks to have been a programming code, but it is mostly faded. Up until now, I have been able to limp down the road when someone complains, but now I guess we have to deal with whatever comes. There is a lesson here about preparation, research, and realistic views. I am too tired and cold to appreciate them at the moment, but one day.....

verifysuccess@gmail.com is the way to reach me, and I truly appreciate your helpfulness.

[joeblack5]

I should be there Thursday and will let you know, good luck in the mean time.. you can try disconnecting the batteries for 10 minutes and see if something gets reset.
What kind of transmission is in your bus?

[headdownlow0624]

Originally Posted by cadillackid

is it possible that a clogged oil cooler is causing the whole issue?

This is what I suspect. The possible ECM damage is just insult to injury.

[Samarath]

Originally Posted by joeblack5

I should be there Thursday and will let you know, good luck in the mean time.. you can try disconnecting the batteries for 10 minutes and see if something gets reset.
What kind of transmission is in your bus?

ServiceMaxx says Allison MD, but...

I just looked up the serial number on Allison's website.
SN 6310646729
ATA CODE 027
Model 2500 PTS

That make sense?
Engine sn: 2y0336580
Rating A215

Gear ratio 5:57

[Samarath]

Originally Posted by headdownlow0624

This is what I suspect. The possible ECM damage is just insult to injury.

Would the oil cooler cause the vanes to close even at KOEO?

[Samarath]

Originally Posted by joeblack5

I should be there Thursday and will let you know, good luck in the mean time.. you can try disconnecting the batteries for 10 minutes and see if something gets reset.
What kind of transmission is in your bus?

We ordered a used IDM/ECM from eBay and had it shipped to the nearest dealership in Reading. I saw your message and I guess maybe I jumped the gun. If you happen across one, I guess we still maybe interested for the sake of a speedy solution. If there is a ray of light shining down on a matching bus, definitely price it for me....lol

[Samarath]

So I am at the dealership and they were able to get the old ECM booted up. Further investigation reveals a 5amp fuse for "engine electronics". I guess I didn't fry the old ECM, but since they're already into programming the new one, I guess I will see if anything changes with it plugged in. If not, I guess I have a spare. What a humbling experience.

[joeblack5]

Having a spare and knowledge and experience is what you have gained.
Was that fuse inside the ecm?

Good luck,
Johan