On Mar 14, 5:05 pm, Tegger <teg...@tegger.c0m> wrote:
> d...@charter.net wrote innews:1173894665.784296.162890@b75g2000hsg.google groups.com:
>
>
>
> > Did they do away with the blinking LED from 90 to 91? I had to
> > troubleshoot the "S" on my 91 for the VSS, and actually had to jumper
> > the clip behind the passenger kick panel. I was just wondering.
>
> From my experiences and the documentation I have, Honda put an LED on the
> face of the ECU and TCM up to 1991. This LED was activated whenever the
> ignition switch was turned to "II".
>
> For 1992 Honda did an across-the-board revision of all their ECUs and of
> error-reading procedures. From that point on, you had to jump the Service
> Check connector to read codes from lights on the dashboard. Prior to that,
> the Service Check connector was only jumped when you were setting base
> ignition timing.
>
> I could be wrong on the above, but I can't find evidence of that.
>
> --
> Tegger
>
> The Unofficial Honda/Acura FAQwww.tegger.com/hondafaq/

I do remember the ECU having an LED but I know for sure my TCU didn't.
I had to jumper it to get the code. Thanks for the feedback.