Re: bmw-digest V9 #2171

["Tarun - bmwmarketplace.com" <tarun@xxxxxxxxxxxxxxxxxx>]

Eugene.

The OBC (On Board Computer) has nothing to do with the idle.  It does have a
code feature that will prevent the car from starting, but that's it.
Disrupting power from it may result in lost setting like language and avg
speed, avg. mpg, etc...  I believe you are confusing the OBC w/ the ECU
(Engine Control Unit) sometimes referred as DME.

I don't think the ECUs are adaptive on M20 motors.  Therefore this should
not have any effect on your idle.  Check your battery connections. Otherwise
something else is causing the problem.  Or maybe you remember the idle being
smoother than it actual was.

t.


>
> Date: Tue, 2 Jul 2002 12:39:49 +0800
> From: "Eugene Hoe" <eugene@domain.elided>
> Subject: E34 525i OBC Relearning settings
>
> I recently disconnected my battery to have it replaced with a new one. As
> such the OBC lost all its optimal
> settings so the idle is rough now. I understand that the OBC is a self
> learning system and will learn back the
> optimal settings, we just need to leave the car running with the A/C
> running. Is there any faster way to get the
> OBC to learn the settings once again, I notice that it takes quite a long
> time for the OBC to learn the settings.
> Can we drive the car as per normal or does it have to be at idle in order
> for the OBC to relearn the settings?.
>
> Appreciate any advice. Tks.
>
> Cheers,
> Eugene
> E34 525i M20

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