Daughter Board Communication Error

[Spunkster]

How exactly are you measuring the voltage when cranking?

[squarenix5]

I have a aftermarket gauge im not sure what it is connected to.

But also looked at what the ECU is reading as well. I also was using the KPRO to see what the ECU was seeing and it didnt drop below 11.2 last night but when i would disconnect the laptop. i would get hte error.

Also, when i was getting the CEL i couldnt do anything at all when i plugged the laptop in i had to turn the car off first then plug in the laptop cause it wouldnt let me connect to the ecu. When i did connect my laptop to it with it running and the code on it would start acting very funny like idle harsher rev kinda float in the rpms. '

Turn the car off and leave the laptop plugged in none of that would happen. I don't understand.

[Spunkster]

Have you done this?: http://www.hondata.com/techk20ground.html

You need to measure the voltage at the ECU using a multimeter to see what is actually happening when cranking.

[squarenix5]

Yes i have done that.

And when i connect to the ECU before i start it up then watch the Voltage on the ECU isnt that the same thing? if its not what good is the voltage meter on the ECU?

[Spunkster]

That is not the same thing. You need to use a multimeter and actually check the voltage when cranking. You have said that it does not get the error if you have the USB connected when cranking.

[squarenix5]

Ok, i will do that after i get off work which pin do i need to connect to?

[Spunkster]

http://www.hondata.com/help/kmanager/ecuconnectors.htm

A2 and A4

[squarenix5]

I think the daughter board is fried.

When i bought the car the kpro was already installed. Looks like something might have gotten on the board.

Ill show you a pic when i get home. This has been so frustrating!

If it is fried what has to be done?

[squarenix5]

what do you think? 2 are blackened and one is really black.

[Spunkster]

Post a picture showing the entire inside of the ECU, makign sure there is no glare and it is in focus.

[squarenix5]

alright, i will when i get off work.

The only spots that are different are the 3 that have black burnout looking Cells. everything else is normal.

I removed the daughterboard to make sure it was seated correctly and that the connectors weren't loose and everything was tight there as well.

[squarenix5]

I didnt get time to take a pic of it last night My father in law broke his ribs so i was busy with that.

Also, is the reason you are wanting a full size pic to make sure its a real kpro? cause that was the first thing i checked and
it is indeed genuine. It just appears that it was overloaded or there was a surge.

what does that r15 cell do on the daughterboard?

[Spunkster]

No I'm not checking if it is counterfeit, but anything out of the ordinary.