Features |
Identification |
Component Locations |
How it Works
- MMS 300:
With this version, the MPI ECM was completely rewritten. This ECU was the first to incorporate
adaptive learning functions such as oxygen sensor control.
The MMS300 ECM was used from October 1992 to early 1993 production in
Audi 80/90 and 100 models. The ECM is made by Hitachi and contains a 16-bit microprocessor with
60kB system memory. The ECM has the same four connectors as the MMS200 series ECM, but
the terminal functions are different and the control module is not backwards compatible.
Engine Control Module:
Successor versions to the MMS300 ECU using OBD-I are designated MMS311. The MMS311 series ECM was
used in all 12v V6 models from 1993 to 1996, when OBD-II was introduced.
Engine Control Modules:
- 8A0 906 266 E
- 8A0 906 266 H
- 8A0 906 266 J
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