Motronic error states / limp home mode

[Jason_Leone at amat.com]

<<does anyone know a simple way to prevent the ecu from going into limp home
without re-programming the eproms, maybe from the diagnostic port ?it is a '93
Audi S4 motronic,>>

You need to talk to Garrett Lim. He knows those Bosch Motronic ECUs better than
anybody, and tweaks them better than anybody.

There should be two data link connectors somewhere in the car (check under the
shift boot). They can be jumpered to make the ECU spit out the OBD I DTC
(Diagnostic Trouble Codes), via the check engine light. You can also clear any
stored codes using the jumper method. It beats paying for a VAG 1551 scan. I
don't think the "limp mode" can be reset that way, and I don't think the codes
are stored in the EPROM either (if you wanted to do a chip swap to clear codes).

Again, Garrett can answer all your questions, and can solve your code problems
once and for all.

http://www.giacusa.com/welcome.html

Check out his sight, and drop him a line.

Jason
'93 SLC