LLY Ficm

715Hunter

715Hunter

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Jul 28, 2022
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Guys, my heartfelt thanks to all of you who are working on this. We have a hard-used LLY work truck that we plan to keep running for a very long time, and it toasted it's second FICM about a month ago. I looked at prices and about shat myself, and though I haven't sent it for repair yet I'm not very hopeful about that being successful.
Like @TheBac I'm not nearly smart enough to understand all this but the entire thread has been a fascinating read. I actually came on looking for something for my LBZ and stumbled onto this.
Any, even very foggy, idea of what it might cost for the future "FUCM"? 😄 Looks like components aren't too pricey but a few (@kidturbo @1FastBrick @Cougar281 @2004LB7 ) of you have invested tons of time into this.
 
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715Hunter

715Hunter

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Jul 28, 2022
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Also, these module pin-outs are awesome!! I have looked for some of them extensively with no luck. Guess I have mediocre google-fu.
 
2004LB7

2004LB7

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Dec 15, 2010
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715Hunter said:
Guys, my heartfelt thanks to all of you who are working on this. We have a hard-used LLY work truck that we plan to keep running for a very long time, and it toasted it's second FICM about a month ago. I looked at prices and about shat myself, and though I haven't sent it for repair yet I'm not very hopeful about that being successful.
Like @TheBac I'm not nearly smart enough to understand all this but the entire thread has been a fascinating read. I actually came on looking for something for my LBZ and stumbled onto this.
Any, even very foggy, idea of what it might cost for the future "FUCM"? 😄 Looks like components aren't too pricey but a few (@kidturbo @1FastBrick @Cougar281 @2004LB7 ) of you have invested tons of time into this.
Click to expand...
Before sending the FICM out, open it up and see if it looks like just a capacitor or other component is burned or if it looks like it burned the board at the bottom of the capacitor. If the board is burned then most won't even attempt a repair. Don't throw it out though. There is a chance it can still be fixed. And if nothing else can be used for testing or repairs on other units. I have one that needs a new chip. Trying to get the chip from overseas. First order got cancelled, probably because they didn't have any in stock. Crossing my fingers the second order works. But an unrepairable board with good parts on it can save another truck from being scraped
 
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715Hunter

715Hunter

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Jul 28, 2022
76
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Missouri
2004LB7 said:
Before sending the FICM out, open it up and see if it looks like just a capacitor or other component is burned or if it looks like it burned the board at the bottom of the capacitor. If the board is burned then most won't even attempt a repair. Don't throw it out though. There is a chance it can still be fixed. And if nothing else can be used for testing or repairs on other units. I have one that needs a new chip. Trying to get the chip from overseas. First order got cancelled, probably because they didn't have any in stock. Crossing my fingers the second order works. But an unrepairable board with good parts on it can save another truck from being scraped
Click to expand...
I'll check it. If it is "non-repairable" you can have it.
 
Bdsankey

Bdsankey

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Feb 1, 2018
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kidturbo said:
Here is what pops up.. This Reman ECM looks to have a slight Identity Crisis.

Description E54 LB7 Duramax ECM
VIN 00Mx00#00000F0$00
Serial Number H00000200000
Hardware Number 3730569214
Calibration ID 33556536
BCC ý½|
Security Seed $7FFF

Operating System 15189044 ($CE65)
Engine Operation 15189053 ($4382)
Engine Diagnostics 15100899 ($E6EE)
Fuel System 15076353 ($3817)
System 15076385 ($F587)
Speedometer 15076393 ($55DE)
Click to expand...
Do you need a good used E54 and FICM to borrow?
 
kidturbo

kidturbo

Piston Tester
Jul 21, 2010
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Cougar281 said:
Here are the scans.
Click to expand...
Those should work nicely. Now who on here has best CAD tools open? Go..

Hey look what showed up in the mail today. Wonder what it is.?



0bb7626b6bb7f16e5e8889a2bd6abe5f.jpg


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kidturbo

kidturbo

Piston Tester
Jul 21, 2010
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1FastBrick said:
Do you know which side of the crank reluctor ring gets the tooth removed from an LBZ?
Click to expand...
Look back on like page 9, i think.

Send a scan of the lbz ring, and we can compare holes to the lb7 in pic above. I'm betting it's one before the gap.

Don't worry about that tooth, just bolt it all together and align dots on the gears. Then we can count reluctor or gear teeth.

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Cougar281

Well-known member
Sep 11, 2006
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St Louis, MO
kidturbo said:
Look back on like page 9, i think.

Send a scan of the lbz ring, and we can compare holes to the lb7 in pic above. I'm betting it's one before the gap.

Don't worry about that tooth, just bolt it all together and align dots on the gears. Then we can count reluctor or gear teeth.

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Click to expand...
It's actually, technically, a LLY reluctor, however, as far as I know, the LB7 & LLY reluctors are the same.
 
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Cougar281

Well-known member
Sep 11, 2006
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St Louis, MO
kidturbo said:
Ok stupid question for everyone.. How we know which crank ring face is up? Or towards front of engine? LLY doesn't have key for comparison. And the holes don't match up either..
Click to expand...
This help? Probably should have scanned the other side :rolleyes:. The side that I scanned was facing forward, or pressed up to the crank gear.
fc2bf300cc7ce782662442cecf516cab.jpg


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