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Ron Stygar
Carl Buckland
Dale Beuning
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From: Ron Stygar <RonStygar_at_aol.com>
Date: Sat, 28 Feb 1998 22:56:11 EST
To: 318ti-compact-list_at_lists.tvfcanada.com
Cc: dale_at_unofficialbmw.com, pineypl_at_ibm.net
Subject: Re: Reset Tool
Years ago on my E30, I was one of the first persons to realize that
grounding pin 7 of the diagnostic connector would reset the service lights. I
found that grounding pin 7 for ~3 seconds applied to an oil reset and that ~9
seconds applied to the inspection reset.
I made up a wire jumper using a copper Mueler alligator clip and banana
plug (male pin) that would accommodate the diagnostic female pin. Rather then
short the two pins within the diagnostic connector, I decided to attach the
alligator clip to engine ground and connect the male pin to diagnostic pin 7
(less chance for error). I also embbeded a 500 ohm resistor in series within
the banana plug. This limited the current to ~25 ma. in case you went to the
wrong pin. As a side note, the reset on an F100 jet engine diagnostic unit is
defined as 50 ohms or less to ground. I made a bunch of these for people that
didn't want to be bothered making their own. I still use one to reset the
lights on my Sweethearts '84 528e.
I'm two lights away from a BMW oil service on my ti. I plan on designing a
similar (in concept) item for it and my 328. On the newer cars it appears that
you have to provide the short and then remove it, after some time, to reset
the lights. Looking in to this, is on my things to do list. Will write up a
how to, when I'm done.
RonStygar_at_aol.com FLI BMW
http://www.unofficialbmw.com/ronstygar.html
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