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Hacking up Honda's ECU
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PostPosted: Mon Jun 22, 2020 11:22 am 
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Location: Puerto Rico
Has anyone been able to troublehoot these and fix them? I have a good collection of bad boards with ignition codes and would like to repair them.

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PostPosted: Wed Jun 24, 2020 7:51 am 
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18 views and no response? What happened to the great contributors that were on this forum?


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PostPosted: Thu Jun 25, 2020 1:22 am 
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Simply connect all supply and ground pinout.. Inject 5-12v pwm signal to pin ckp, cyp and tdc. Then just test with oscilloscope the output signal. Common problem is the ic problem or any short or open circuit.

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PostPosted: Sat Jul 25, 2020 8:58 pm 
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Theres a aftermarket board you can replace it with that Honda Rulez made.


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PostPosted: Sun Jul 26, 2020 7:00 am 
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bmgjet wrote:
Theres a aftermarket board you can replace it with that Honda Rulez made.


Are you sure it replaces H1C1 & H1C2?

I know there is a Coil on Plug board which I sell and it looks similar but I have not seen a product that replaces these boards.


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PostPosted: Wed Oct 07, 2020 10:17 pm 
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I hope these help


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PostPosted: Sun Oct 18, 2020 11:46 pm 
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Would these boards throw a icm signal loss code?


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PostPosted: Wed Oct 21, 2020 5:45 pm 
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projectteg wrote:
Would these boards throw a icm signal loss code?


Most definitely will be part of it.


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PostPosted: Sat Mar 06, 2021 4:17 am 
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I repair a lot of them major times the problem are the op amp but I find some problems with caps too.

The right way to test is with a oscilloscope


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PostPosted: Sat Mar 06, 2021 8:59 am 
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How would a person just starting with an oscilloscope troubleshoot these boards?


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PostPosted: Sun May 23, 2021 11:21 pm 
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i connect the ECU in my engine simulator and test the 3 signals input and follow trow the h1c2 sub-board the 90% off the times the problem its the op amp.

and some times the caps or resistors


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PostPosted: Fri May 28, 2021 2:07 pm 
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crisaguilar wrote:
i connect the ECU in my engine simulator and test the 3 signals input and follow trow the h1c2 sub-board the 90% off the times the problem its the op amp.

and some times the caps or resistors


Is the op-amp replaceable? ... are there any replacement part numbers etc that you know of?


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PostPosted: Fri May 28, 2021 2:30 pm 
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shiftyjonno wrote:
crisaguilar wrote:
i connect the ECU in my engine simulator and test the 3 signals input and follow trow the h1c2 sub-board the 90% off the times the problem its the op amp.

and some times the caps or resistors


Is the op-amp replaceable? ... are there any replacement part numbers etc that you know of?



LM393D


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PostPosted: Fri May 28, 2021 2:34 pm 
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majdi wrote:
shiftyjonno wrote:
crisaguilar wrote:
i connect the ECU in my engine simulator and test the 3 signals input and follow trow the h1c2 sub-board the 90% off the times the problem its the op amp.

and some times the caps or resistors


Is the op-amp replaceable? ... are there any replacement part numbers etc that you know of?



LM393D


Legend! ... thank you


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