From: Brett Anderson [bretta@bestweb.net]
Sent: Montag, 21. Dezember 1998 20:05
To: Horst Apfelthaler
Subject: Re: E30 C101 connector

Black and green goes to the starter motor, from the K5 unloader relay.
It is used to shut off the unloader relay's while cranking.  There is a
second tab on the E30 starter to allow this. Not the same tab as the
black/yellow trigger wire. I am not sure if the E28 has this connection,
I don't have any E28 ETM's handy.

TD is engine rpm.  It goes to the tachometer.  Check the E28 wiring,
probably this wire is in a small 3 connector plug on the side of the E28
DME connector.

Same with TI, this is fuel injector opening time and is used by the
cluster and OBC to determine fuel consumption. In the E28, this probably
goes through the same 3 pin connector as TI

ECU pin 29 is the vehicle speed input, it comes from the instrument
cluster and tells the DME what the vehicle speed is.


Brett Anderson
BMW and ASE master technician
http://frontpage.bestweb.net/~bretta

Please include all correspondence when replying
to avoid confusion - Thank you


>
>I'm currently planning to do a '86 528e e to i uprade and have already
all
>parts (complete '88 325i
>with 1.1 ECU) available. I also have some copies of the ETM's
available, but
>it seems that I have not
>all necessary pages.
>The problem is to figure out a adapter cable to connect the round E30
>connector to the rectangular type of
>the E28.
>I already had a look do the drawing circuits of the E30 C101 connector
and
>figured out that
>there are 3-4 pins I don't have any information about:
>
>pin 8  goes to ECU pin 32 (german short description TI)
>pin 9  goes to ECU pin 6  (german short description TD)
>pin 14 goes to ECU pin 29 (german description TACH)
>pin 15 goes to starter terminal 30h color is black/green
>
>Question: what are these pins used for?
>
>Regards
>
>Horst from Austria
>
>email: horst.apfelthaler@compaq.com
>'80 323i project car with eta power, soon be e to i upgraded
>'89 320iC
>'95 A4tdi
>
>
>