I have a coder in the Philippines working on modifying that existing emulator sketch. Hope to see a demo in a few hours.
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LLY Ficm
- Thread starter mplecha
- Start date
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Just noticed this looking at some Medium duty stuff. Check out the note on the EDU in the middle...
Note: All Injectors Delayed 90 Degrees By EDU Processing
Note: All Injectors Delayed 90 Degrees By EDU Processing
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You guys are throwing so much info out there so quickly its making my head spin.
That is Very Interesting... Will be good to know if we can verify that in real time on the bench. Would sure explain WHY that Crank signal is so darn important..
I'm almost finished with my bag of Skittles. Starting to wire up some POTs in place of sensors like MAP and Fuel Pressure. If you could share the PCM to Fuse Block diagram, that would be helpful also. I left all that in tact, but trying to get a grip on how the Key works in the Med Duty.. There seems to be a Crank Trigger wire in this ECM harness, as would be used by a 2500 with BCM.. So has me wondering..
I'm almost finished with my bag of Skittles. Starting to wire up some POTs in place of sensors like MAP and Fuel Pressure. If you could share the PCM to Fuse Block diagram, that would be helpful also. I left all that in tact, but trying to get a grip on how the Key works in the Med Duty.. There seems to be a Crank Trigger wire in this ECM harness, as would be used by a 2500 with BCM.. So has me wondering..
I would think the 90°delay would apply to both the LB7 and LLY if it applies to one, even if it's not noted in the LLY info... but what do I know? Lol.
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It doesn't show the pin out of the connector for some reason. Let me see if i can locate the connector separately.
EDIT: Added the rest of the fuse block
EDIT: Added the rest of the fuse block
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I would tend to agree. One would think that big processor chip does more than just some simple diagnostic tasks. But if I recall, isn't there a slight difference start of injection timing between the LB7 & LLY in tune files? And we have the difference in our control line structure.. Maybe the engineers figured out how to remove the processing lag by 03. Would love to pick those brains over a beer or two...
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I find it interesting that wasn't noted on anything else I have seen but just happened to be listed on that Medium Duty Schematic where they call it an EDU instead of a FICM.
All the LB7 and LLY electrical diagrams for the light duty call the FICM the EDU. Even the fuse box does
One could possibly test the 90° claim by logging the crank and the injectors and see if the firing is off that much. Should be able to see all 8 injectors over the course of two revolutions. If they are 90° delayed then it should be obvious. Of course you'd need a scope with enough channels like Ken has. Otherwise scoping just injector #1 or #3 plus the crank signal might work. Might help to set the tuning so the injection timing is all set to zero so it doesn't influence the results
I'm getting closer. Soldering wires for the last couple of hours. Gonna bring the data lines up first, then can use EFIlive to adjust the pots, and see if she will fire..
I'd forgotten how freaking long it took me to build the previous stand along harnesses...
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I'd forgotten how freaking long it took me to build the previous stand along harnesses...
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Have discovered one interesting point so far. The Crank signal from pickup, and one going to the FICM, don't share continuity.
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ECM is alive and talking on Class 2 Serial..
After all this work, I gotta find a boat in need of an LB7 swap..
Break time.
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After all this work, I gotta find a boat in need of an LB7 swap..
Break time.
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There is always the possibility that the LLY doesn't have the same lag, but just because it's not listed on circuit diagrams doesn't mean it's not there. Only testing, getting the raw code or talking to someone who designed it will tell for sure at this point.
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Same here haha.
I'm just here with my popcorn soaking up as much info as I can. I'm a ME not an EE, way over my head.
I hit every pin on that FICM with a scope searching for something resembling K line or Class 2 data. Nothing..
Nor could I find a chip that matched the K line chips on other Bosch products. I'm gonna have to concede defeat on pulling the firmware and pass that off to a professional ECU hacker. I really want to compare those OS between years. But I'm pretty certain, they never intended for those to be updated once shipped. The definition of Non-Serviceable..
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