\*\*\*\* BMW 318i Computer Reset Question \*\*\*\*
SCOTT WARREN ROSANDER
I think a couple of months ago I ead an article on how to reset the
service computer on a 1984 318i by shorting two wires....The only problem
is that I forgot which ones. Any advice...
--
David Draper
I don't remember the exact wires that are "shorted" to reset the
service and oil lights. You might try mailing off to the BMW list.
b...@balltown.cma.com
I seem to remember reading something about shorting wires together
will reset the lights but that there is also a chance of doing some
real damage to the SI board.
- Dave
87 325is
--
David Draper
ddr...@netcom.com
Christof A Neumann
sw...@ns1.cc.lehigh.edu (SCOTT WARREN ROSANDER) writes:
>
OK, it wasn't me who wrote the article you mentioned, but this may
help as well:
Under the hood there is a jack for diagnosing purposes. There the BMW
service tester is attached, but also a small device with which the
inspection lights are reset. This little device does only one thing:
It makes a short circuit between two ports for a specific time interval.
And this you can do perfectly by hand with a piece of wire and a clock.
And now the answers to the three questions arising:
* Which two ports to connect:
There are two kinds of diagnosing jacks used, depending on year of
manufactoring of your car:
- Small one with 15 ports, until 1987:
You have to connect port 1 (one) with port 7 (seven).
It looks something like that:
1
/------\
1 | o O o \
| o o o )
2 | o @ @ | <<--- @ = the two reset ports
| o o o )
3 | o o o /
\------/
- Large one with 19 ports, from 1988 on until now:
You have to connect port 7 (seven) with port 19 (nineteen).
* How long to connect the two ports:
That depends on what reset you want to do:
- "OILSERVICE"-reset (i.e. the parameters for inspection remain
unchanged):
2,5 - 3 sec
- "INSPECTION"-reset (i.e. full reset):
10 - 12 sec
* Which steps to do:
1. Ignition *off*
2. Connect the two ports.
3. Ignition *on*
3. Start counting the time when ignition is turned on.
4. After the obove mentioned time has elapsed, disconnect the
two ports.
Just that I don't have to buy you a new car:
*** All this comes without guarantee. Do it on your own risk. ***
Cheers
Chris
'89 535i
--
Christof A. Neumann Institut fuer Informatik
der Technischen Universitaet Muenchen
"Crede experto." D-80290 Muenchen, Germany
(Silius Italicus) Tel +49 89 450552 33 Fax +49 89 450552 22
neu...@informatik.tu-muenchen.de
neumann%informatik.tu-muenchen.de@{relay.cs.net,unido.uucp,unido.bitnet}
--
jsk...@news.delphi.com
A previous posting indicated taht on the 1989 325i, the reset pin is 7.
This is to be grounded to pin 19.
Turn on the ignition with the jumper in place and wait until the
oilservice light goes out. Then turn off the ignition. Leaving it on too
long will reset the Service lamp.
BMW changed theservice connector in the late '80's, so you should find out
when this took place.
I bought a service tool for my '85 535 for ~ $50, but I would use a piece
of wire now that I know that is all that is required.