What are the components in a LMC5
Team Owner



Joined: May 2001
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Hank
Its probably a JK FLIP FLOP chip and supportig circuits that changes state to match the state that the BCM needs logic wise to work.
One wire is power and the other is ground. The other two are the outputs
http://commons.wikimedia.org/wiki/Fi...p_(4-NAND).PNG
Without ripping one apart, its tough to tell.
Even if you do rip one apart, it may be potted so people cant just copy the design. I know If I made and sold it, thats what I would do.
BC
Its probably a JK FLIP FLOP chip and supportig circuits that changes state to match the state that the BCM needs logic wise to work.
One wire is power and the other is ground. The other two are the outputs
http://commons.wikimedia.org/wiki/Fi...p_(4-NAND).PNG
Without ripping one apart, its tough to tell.
Even if you do rip one apart, it may be potted so people cant just copy the design. I know If I made and sold it, thats what I would do.
BC
Drifting






Joined: Oct 2011
Posts: 1,872
Likes: 333
From: Olmsted Falls Ohio
St. Jude Donor '12 thru '24
You might get a better response if you would indicate why you are asking the question.
- Do you have an LMC5, and it doesn't work?
- Are you trying to see if it will work in another vehicle?
- Is your C5 wiring modded and you want to determine if it will still work?
I would think all those issues could be answered quickly by merely calling Richard at Compliance Parts. By now, there is plenty of evidence that the product works and the support is robust. If you have doubts about using the product, then don't consider it.
I can think of no other valid reasons to ask the question. The developer will want to protect his investment and intellectual property. Curiosity is okay but the component details are 'really' none of your business. If you really want to know, buy one and break it open, and keep the findings to yourself. Good luck to you.
- Do you have an LMC5, and it doesn't work?
- Are you trying to see if it will work in another vehicle?
- Is your C5 wiring modded and you want to determine if it will still work?
I would think all those issues could be answered quickly by merely calling Richard at Compliance Parts. By now, there is plenty of evidence that the product works and the support is robust. If you have doubts about using the product, then don't consider it.
I can think of no other valid reasons to ask the question. The developer will want to protect his investment and intellectual property. Curiosity is okay but the component details are 'really' none of your business. If you really want to know, buy one and break it open, and keep the findings to yourself. Good luck to you.
Hank
Its probably a JK FLIP FLOP chip and supportig circuits that changes state to match the state that the BCM needs logic wise to work.
One wire is power and the other is ground. The other two are the outputs
http://commons.wikimedia.org/wiki/Fi...p_(4-NAND).PNG
Without ripping one apart, its tough to tell.
Even if you do rip one apart, it may be potted so people cant just copy the design. I know If I made and sold it, thats what I would do.
BC
Its probably a JK FLIP FLOP chip and supportig circuits that changes state to match the state that the BCM needs logic wise to work.
One wire is power and the other is ground. The other two are the outputs
http://commons.wikimedia.org/wiki/Fi...p_(4-NAND).PNG
Without ripping one apart, its tough to tell.
Even if you do rip one apart, it may be potted so people cant just copy the design. I know If I made and sold it, thats what I would do.
BC
To the poster who said it is none of my business (is he the guardian of technology or maybe the defender of the turbonator) inquiring minds like to know.
Someone did enough research and design to fix a problem that GM couldn't. Then he manufactured and marketed it, then he provided technical support to all who needed it. $50 bucks sounds like a deal to me, regardless of what's in it. GM had millions to invest and they couldn't fix it.
Someone did enough research and design to fix a problem that GM couldn't. Then he manufactured and marketed it, then he provided technical support to all who needed it. $50 bucks sounds like a deal to me, regardless of what's in it. GM had millions to invest and they couldn't fix it.
We need someone to do that exact same thing for the EBCMs for the pre-2001 models. I mean, come on. It would appear, whether on not the PROM can be disassembled, a working one should be able to be copied to an EEPROM. The rest of the circuit doesn't look too hard to be duplicated. From all I've read, that rest of the parts are pretty standard stuff, but the primary chip has been the hold up for such a long time. The rest is just caps, relays and resistors. I'm not an EE, just stating an opinion. I've always wondered why the primary chip couldn't be copied to an EPROM.
Team Owner



Joined: May 2001
Posts: 36,836
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From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
Tech Contributor





Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
**My apologies in advance to the OP. This wasn't meant to hijack your thread.**
We need someone to do that exact same thing for the EBCMs for the pre-2001 models. I mean, come on. It would appear, whether on not the PROM can be disassembled, a working one should be able to be copied to an EEPROM. The rest of the circuit doesn't look too hard to be duplicated. From all I've read, that rest of the parts are pretty standard stuff, but the primary chip has been the hold up for such a long time. The rest is just caps, relays and resistors. I'm not an EE, just stating an opinion. I've always wondered why the primary chip couldn't be copied to an EPROM.
We need someone to do that exact same thing for the EBCMs for the pre-2001 models. I mean, come on. It would appear, whether on not the PROM can be disassembled, a working one should be able to be copied to an EEPROM. The rest of the circuit doesn't look too hard to be duplicated. From all I've read, that rest of the parts are pretty standard stuff, but the primary chip has been the hold up for such a long time. The rest is just caps, relays and resistors. I'm not an EE, just stating an opinion. I've always wondered why the primary chip couldn't be copied to an EPROM.
There was a very in depth discussion about it and someone who does that type of repair for a living said FORGETABOUTIT!
However,, that being said, the relays and standard components are easily repaired/replaced.
There are TWO relays on the secondary board. The MAGNASTEER RELAY & the main power relay.
The microprocessor board is connected to the output pins by very small ALUMINUM WIRES and the entire assembly is surrounded in thick silicone gel. You cant solder the aluminum wires with a conventional solder iron.
Bill













You're on the right track. 