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LLY Ficm
Ok have the basic pulse pattern for Crank / Cam reluctors at least looking like a OEM Duramax part now. Next to go pull cam and crank sensors on my partially assembled engine, and count teeth on crank reluctor, from big gap, to piston TDC. Open for guesses ?? While we might get lucky and this... -
LLY Ficm
Ok, who has a Cam wheel wheel laying around in a box of parts? I could use a measurement, or an alignment conformation of these edges to center hole. Can check it with a straight edge of on gear, or draw an X on piece of paper, and lay the ring over it. I was messing with the crank / cam... -
LLY Ficm
You're making me feel old now. Pretty sure I recall your your bench harness also. And the Beez helped me out back in the early days. I got lucky, and first duramax I ever owned, was a stand alone lly. Which I soon rewired to engine mounted ecm. But that boat taught me the basic 5v signaling... -
LLY Ficm
Has a VIN and SN, so 2X better looking than mine already. :) Would need to disable VATS, but should work for what we are trying to accomplish. I'd totally forgotten about the whole give us your vin, name of first born, picture with vehicle while holding up today's newspaper approach to a... -
LLY Ficm
In my experience, I've only hard bricked 2 ECU's. A E38 by loading the wrong OS. Still works today, just can't ever be reflashed. And the second was this same ECU in the gasser version. Modified a TPS minimum value to close throttle blade, and I may as well shot it from a cannon... It completed... -
LLY Ficm
So far have only seen the 0537 code when attempting to read config with V3. Along with the NVM Failed message under State04 pid. Guess I could fire up that GM MDI and see if it knows anything of value. Unless GM offers a money back satisfaction guarantee on TISweb flash updates, probably going... -
LLY Ficm
I'm leaning heavily towards the 🔨 Show RPM, injector timing, and pulse width values. Along with several questionable status messages. Has zero voltage or pulses on all 8 control wires. Shows a constant 5V on the crank signal to the FICM, no pulses. However as a last ditch effort, I grabbed... -
LLY Ficm
I might have cooked it's brain. Been dropped, kicked, powered up wrong, and is about to be beaten with an MDI or a Hammer :eek: Did notice a NVRAM Status "Invalid" msg when data logging pids yesterday. Just ignored it. But now thinking, just maybe, there could be something to it? -
LLY Ficm
I'd certainly be down with a second LB7 unit for comparison, or even reflashing this one. Have an MDI on my bench I keep moving out of the way.. Right after I yank this tune file, then search for my old post in 11-12 when I sorted similar APPS issue out on the LLY boat. Am certain it's a been... -
LLY Ficm
@2004LB7 that 90deg offset / delay confirmed by 3rd party. Has actually been manipulated on the ECM side previously for racing use. So we are gonna need to build that it into FUCM design specs if adhering to a direct plug-N-play replacement model. As for the LB7 to LLY mod. Odds improving on a... -
LLY Ficm
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... -
LLY Ficm
I'm beginning to wonder the same. Need to pull up the Ignition Switch schematics and work backwards from there. All models had J1939, but 2500-3500 never ran it inside the cab. Standard J1939 diagnostics uses a 6 or 9 pin round connector. Distinctly different from a DLC16. Have things hotwired... -
LLY Ficm
Dang that scaling does look way off. When I was sorting the wires, I noted a couple of the 5v and Lo Ref lines listed in pinout for the APP circuits, were actually going to the engine bail connector for MAP or Baro sensors. Reason I left those out of the loop for first test. But that doesn't... -
LLY Ficm
Could use a hand verifying some throttle pedal values on a running truck. While these look reasonable to me, and they sweep fine, the ECM has codes set for all 3 APP signals showing Out Of Range errors. Cleared codes, but they keep coming back. Pinout looks correct, wire colors all matched... -
LLY Ficm
IT'S ALIVE !! Still need to add a POTs to the Baro and Map lines, but I did get ECM firing on all cylinders with no FICM attached. Now to tidy up this mess and get rest of the tools attached so we can bring the FICM up on the lines.. BTW. Still haven't figured out how these Kodiak power up...