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Old 30 Nov 2004, 08:45 pm
Roy and Rosa
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Default Re: how to test ECU on Honda Civic '89

Yes. I have 12 volts to ground on hot side of fuse and no volts on load
side. ( with fuse pulled)
volts on both sides with fuse in.
I have checked all the simple stuff. I'm into the hard stuff now.
thats why I need a diagram or pinout at ecu.

should ecu flash anything on powerup ,or ignition on, even if ecu is good?
see earlier post "89 civic HB, no spark, not main relay or ignitor"
Roy

"Michael Pardee" <michaeltnull@cybertrails.com> wrote in message
news:LbCdnYdz8unYiTDcRVn-uQ@sedona.net...
> "Roy and Rosa" <rbeaty@grandecom.net> wrote in message
> news:10qnm4b1ts97857@corp.supernews.com...
> > How can I check that the computer is working? Check engine light is on
> > while ignition is on and while cranking, but no flashing led on ecu.
> > I have no spark. all the distributor parts check out ok. Main relay

too.
> > No pulse from ECU.
> > Fuse to ECU has no current draw on it. I pulled fuse and put an ammeter
> > across terminals, no current draw!
> > Anyone have a wiring diagram or a pinout of the ECU?
> > Thanks Roy
> >
> >

> Try checking for voltage on the fuse (or the fuse socket, if that is
> easier). I'd suspect loss of voltage first.
>
> Mike
>
>



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