Daughter Board Communication Error

K-Series Programmable ECU installation questions / support issues
newpassport
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Daughter Board Communication Error

Post by newpassport »

i had set up the kpro3 in my K24 EG
all thing been check.the wring, the battery,the ground and the alternator.the voltage was 13.9v reading in kpro.the battery was 14.1v
some time the error came out when i start the car,some times not,not often.
which will cause this?thanks

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Hondata
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Re: Daughter Board Communication Error

Post by Hondata »

Low battery voltage when cranking. Check the voltage while cranking.
Hondata

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Spunkster
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Re: Daughter Board Communication Error

Post by Spunkster »

What is the battery voltage when cranking?

newpassport
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Re: Daughter Board Communication Error

Post by newpassport »

problem fixed.it was the starter wiring problem.

squarenix5
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Re: Daughter Board Communication Error

Post by squarenix5 »

I am getting this same error, i have have replaced all the required grounds that is mentioned on the website.
What do you mean by starter wiring problem? i havent checked this yet and maybe it is the culprit.

Also it usually only does it now when it is really cold out after i replaced all the major grounds. and most of the time when i turn the car off and back on it goes away.

Any help is appreciated.

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Spunkster
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Re: Daughter Board Communication Error

Post by Spunkster »

Spunkster wrote:What is the battery voltage when cranking?

squarenix5
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Re: Daughter Board Communication Error

Post by squarenix5 »

ill check when i get off work here soon. I have an aftermarket Volt Meter Gauge in the car to monitor it and i never see it drop below 13.5 but i dont know how responsive it is and it always starts up on first crank. even when its super cold outside like it was today. It also has a new battery in it.

squarenix5
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Re: Daughter Board Communication Error

Post by squarenix5 »

ok so i turned the key to prime it and so the volt meter was reading straight off the battery the voltage dropped down to 10.1. So where do i begin now on grounds. This is getting to be a nuisance.i redid the one to the timing cover the battery and the trans i will check the alternator one again but it appeared good last time.

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Spunkster
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Re: Daughter Board Communication Error

Post by Spunkster »

You either have a fault or corosion in the wiring for the batter/alternator/ECU or you have a dying battery.

squarenix5
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Re: Daughter Board Communication Error

Post by squarenix5 »

OK, so im gonna check the one for the Alternator here soon. Where is the ground pin for the ECU?

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Spunkster
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Re: Daughter Board Communication Error

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squarenix5
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Re: Daughter Board Communication Error

Post by squarenix5 »

alright i put a whole new ground on the battery and the voltage only drops to 11.1 now is that OK? what is normal for a voltage drop when cranking?

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Re: Daughter Board Communication Error

Post by Spunkster »

That sounds better, did it fix the issue?

squarenix5
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Re: Daughter Board Communication Error

Post by squarenix5 »

Unfortunately not. It was really cold this morning about probably about 20 degrees outside or colder and it took a few cranks and the error came back on. Im gonna get me some more wire i guess and run a new wire from the alt to battery and alt to chassis and see what that does for me.

squarenix5
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Re: Daughter Board Communication Error

Post by squarenix5 »

also it was really weird when i connect my laptop to K-pro to clear the code last night the whole system kinda like clicked right as i plugged the laptop in like it was gonna die then came back to life like the computer reset.

Is that normal?

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