"Don B." <meetoo@pinballhobbyist.com> wrote in message news:eIuRg.104159$QM6.1210@bgtnsc05-news.ops.worldnet.att.net...
> I've Googled and scanned this newsgroup. Excuse me
> for asking this simple question, but how does one safely
> replace an ECU? Here us what I presume:
>
> 1. Disconnect car battery

If you want to disconnect the car battery be my guest. There's virtually no
damage that I can see. There's more damage if you fumble with the battery
terminal causing all those spikes.

Plus, where did you get step #1 from?

> 2. Remove old ECU
> 3. Install "new" ECU
> 4. Reconnect car battery
> 5. Start car
>
> I am guessing that this is simple, like above, and that is
> why I can't find instructions on how o do it. I just wanted
> to check to make sure.
>
> My son just bought a 1998 Civic in nice condition. The ECU
> will not produce any codes and the check engine light is
> always on. My searching on this indicates the ECU is probably
> bad. So, I want to try replacing it and I do not want to
> do it incorrectly and cause problems instead of solve them.
> Thanks,
> Don

The correct way to replace the ECU (that is dead) is to unplug the
ECU and probe the harness for a massive short.


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