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Know Where To Get ECU Circuit Schematics?

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Old Apr 23, 2011 | 11:18 AM
  #1  
VegasInvasion's Avatar
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Default Know Where To Get ECU Circuit Schematics?

The old ECUs are obsolete, so I see no reason there shouldn't be a complete circuit schematic available. If anyone knows where to get one or who to talk to, please PM me.
I've repaired nearly 100 of them, but I have another 25 or so that I can't diagnose. They're a commodity, I'd really rather not throw them away.
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Old Apr 23, 2011 | 01:14 PM
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Default Re: Know Where To Get ECU Circuit Schematics?

I bought mine from Bomarc.

http://www.bomarc.org/
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Old Aug 31, 2011 | 06:47 PM
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Default Re: Know Where To Get ECU Circuit Schematics?

I'm not finding any evidence that Bomarc is still in business. Any other suggestions?
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Old Sep 1, 2011 | 06:12 AM
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Default Re: Know Where To Get ECU Circuit Schematics?

That's what I thought, but they were nice enough to sell a copy anyway. You're right, though, it appears their site is down.
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Old Nov 6, 2011 | 09:15 PM
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Default Re: Know Where To Get ECU Circuit Schematics?

sooo how much are you selling copies for
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Old Nov 6, 2011 | 09:32 PM
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Default Re: Know Where To Get ECU Circuit Schematics?

I was just wondering about this the other day, out of purely wanting to learn.

It might come in helpful for me here soon too since I think I might have a bad PM8 and I'd really rather not buy another ECU for an engine I'll only be using a couple more weeks (if it ran right!).
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Old Nov 18, 2011 | 05:33 PM
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Default Re: Know Where To Get ECU Circuit Schematics?

I already repair ECUs to some extent. I've replaced circuits for crank sensors, injectors, O2, A/T, IAT, and IACV using spare OEM parts. But It would be nice to have the actual schematics.
NOFX, I believe the P08 uses a different manufacturer for the circuit board than the P28, the circuit functions are relatively the same but the layout is different. Nonetheless if you PM me some details about what happened and/or what it's doing I may be able to repair it or guide you through a repair.

Last edited by VegasInvasion; Nov 18, 2011 at 05:34 PM. Reason: not my baby, not my problem.
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Old Nov 18, 2011 | 05:40 PM
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Default Re: Know Where To Get ECU Circuit Schematics?

Originally Posted by VegasInvasion
I already repair ECUs to some extent. I've replaced circuits for crank sensors, injectors, O2, A/T, IAT, and IACV using spare OEM parts. But It would be nice to have the actual schematics.
NOFX, I believe the P08 uses a different manufacturer for the circuit board than the P28, the circuit functions are relatively the same but the layout is different. Nonetheless if you PM me some details about what happened and/or what it's doing I may be able to repair it or guide you through a repair.
Well, this problem might be left unsolved for me because today we started my engine swap.

The ECU is a PM8 btw, an '88 CRX HF ECU.

If you're curious about the problem, I was trying to solve it at least in case it might help other people. I posted a bunch of pages from the service manual and did several tests and even swapped some parts but the behavior never improved.

https://honda-tech.com/forums/tech-misc-15/tps-problem-cant-seem-solve-2999085/
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Old Apr 24, 2021 | 06:19 PM
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Default Re: Know Where To Get ECU Circuit Schematics?

Originally Posted by VegasInvasion
I already repair ECUs to some extent. I've replaced circuits for crank sensors, injectors, O2, A/T, IAT, and IACV using spare OEM parts. But It would be nice to have the actual schematics.
NOFX, I believe the P08 uses a different manufacturer for the circuit board than the P28, the circuit functions are relatively the same but the layout is different. Nonetheless if you PM me some details about what happened and/or what it's doing I may be able to repair it or guide you through a repair.
good day
is this offer still open?
j have PO8 with burnt C32 including part of board.im not sure if the copper lines are still ok and to what part it goes to


. Thanks in advance
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