MTVR engine ECM

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007

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Does anyone have an engine ECM available for an MTVR with Cat C-12? Or know which one it uses?
 

simp5782

My safe word is Pork and Beans.
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Memphis, TN
Does anyone have an engine ECM available for an MTVR with Cat C-12? Or know which one it uses?
Cat 226-7469. Same 24v ecm that can be used on the c15 engine in the HET and HEMTTs.

What is your engine serial number? Should have a KRA prefix
 

simp5782

My safe word is Pork and Beans.
Supporting Vendor
8,004
487
83
Location
Memphis, TN
It looks like the SN starts with 9SM if I’m looking at the right number?
Yes. Sorry the C12s have the list of prefixes below. The ecm number i came up with is from the parts TM.

I was thinking a c15 for some reason on the prefixes ,that would make that 7ton roll then


1YN
2KS
8YF
9NS
9SM
CPD
GEP
MBL
TME
 
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Efituned

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Midland, Ga
Is your truck missing one or do you have a no start condition? I just sent my ecm off to be rebuilt or replaced. Just curious to see if you're have the same problems as me.
 

007

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Location
Michigan
Is your truck missing one or do you have a no start condition? I just sent my ecm off to be rebuilt or replaced. Just curious to see if you're have the same problems as me.
Bought as a non runner. It came with it removed in the cab. There was a piece of tape on the hood labeled “Bad ECM”.
 

MAdams

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They use a 70 pin ecm. Its s slim chance that you'll fine a ecm for the 9sm engine. You'll probably have to buy a 70 pin and have it flashed for your engine. Oerhave it repaired like Efituned did.
 
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JonM934

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A little bit off topic but what happened to all the other non runners that I assume were purchased as parts trucks? Someone should have a non runner that they could sell the parts off of.
 

007

Member
144
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Location
Michigan
A little bit off topic but what happened to all the other non runners that I assume were purchased as parts trucks? Someone should have a non runner that they could sell the parts off of.
I was wondering the same, not many parts available right now. Maybe they are still waiting on EUCs
 

Efituned

Member
89
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Location
Midland, Ga
Check goecm.com before you spend a bunch on an ecm that may be junk.
That's where I sent my ecm. I received a call from them earlier today saying that my ecm wasn't repairable, due to a bad microprocessor. They were one of the few that didn't charge a diagnostic fee.

Here's some more information I gathered. I spent almost two weeks calling a bunch of different ecm repair places. I talked to some knowledgeable folks. Basically the parts needed to repair these ecm's are unavailable. If one is being repaired they are doing so with used parts from another ecm. If, like in my case the processor is bad, they will not repair. I was told that the voltage regulator providing injector pulse will spike to ~200v arcing on the processor or things by it. So the options are to buy new or used ecm, but to skip the middle man selling a "rebuilt" ecm that is really spray painted used working unit.

Almost any 70pin ecm will work, however there are some differences. I know some of you have CAT ET, if you can make a copy of the oem MTVR program that would help some of us when buying a blank ecm. We could send them that file or the parameters needed to flash the replacement ecm.
 
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JonM934

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Efituned,

I wonder if the microprocessor is really not available. I know many places to get old outdated parts and my brother is an electrical engineer at Texas Instruments. Well, he was until he retired. I bet we could find the part.

It may be an issue of not being able to replace the processor. It is probably surface mounted and if it is tight in there, then it is very hard to get the old one out, plus resoldering a surface mount part in is VERY difficult. I have done it with 12 pin chips but processors have hundreds of pins.

I like your idea of making a copy of the firmware for the ECM. It should be saved someplace where we could download it when needed. It is not a question of if we need it but when we will need it. Each of our trucks may be good for now, but sooner or later every ECM is going to fail.

Jon
 
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