Bosch ECU Schematics

[Orin Harding]

I don't know if this will be what you're looking for, but there is a company 
in the UK that makes what they call an "implant" for the BOSCH Motronic.  This 
allows complete user programming of the Motronic ECU.  The company is:
General Engine Management Systems Limited
Unit A1/D, Thorpe Techno Park
Crabtree Road, Egham, Surrey, TW2 8RN, England
Phone: +44 (0) 784 470525  Fax: +44 (0) 784 470527
Contact name: Richard Armitage

Hope this helps
Orin

Primary e-mail address: orin at deltacp.com
Secondary e-mail address: NAMGBR at msn.net
Check our WEB site:  www.deltacp.com
Phone/Fax: (910) 854-3232
Mobil Phone: (910) 601-8418

----------
From: 	owner-diy_efi at coulomb.eng.ohio-state.edu on behalf of John Dammeyer
Sent: 	Thursday, July 11, 1996 7:33 AM
To: 	diy_efi at coulomb.eng.ohio-state.edu
Subject: 	Re: Bosch ECU Schematics

At 06:09 PM 10/07/1996 -0400, you wrote:
>At 02:31 PM 6/11/96 +0000, you wrote:
>>I am looking for Bosch ECU Schematics for the following cars:
>>
>>BMW 530i, 1978
>>Datsun 280Z, 1975-1978
>>Datsun/Nissan 280ZX, 1979-1983 (incl. turbo).
>>
>>If anyone has any schematics for the ECUs for these cars, any or all 
>>of them, in any format, please let me know.  Also, if anyone knows of 
>>any good source of information on these systems, I'd love to see it.
>>

As I understand it the Bosch uses the CAN bus for communications.  Your
first step in reverse engineering or even monitoring the system would be to
determine which two wires make up RT+ and RT-.  Then attach a suitable CAN
card monitor and eavesdrop.  Coupled with logging other real time info such
as engine RPM there is a likelyhood that you would be able to determine
which messages say what.  But.... other than reporting some sort of status
or replacing completely a particular module I'm not sure what you'd do with 
it.

John.

Pioneers are the ones, face down in the mud,
with arrows in their backs.
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