Rover MEMS Diagnostic and Remapping

Here is a collection of information and software surrounding Rover car ECUs and control units
The ECUs are referred to and marked as "MEMS" ECUs which stands for Modular Engine Management System
Rather than building a new ECU for every car, a base ECU was used with slightly different components and software depending on the application

This applies to cars (engines) from around 1991-2000+ including Rover (Mini, Metro, 100, 200, 400, 600, 800), Land Rover, MG - F TF, Lotus Elise, Kit cars - Caterham, Morgan, Westfield etc

Choose an ECU or module from below to find out more

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MEMS 1.2 ECU

VERY early SPI cars (1991) without Catalytic Converters- 1x36 pin connector, smooth lid, X on the base/bottom, vacuum connector on the corner

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MEMS 1.3 ECU

Tend to be used on early SPI cars (1992-1993) - 3 pin round diagnostic connector - 1x36pin and 1x18pin connector - lines and screws in the lid - vacuum connector between plugs

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MEMS 1.6 ECU

Used mostly for SPI cars and some early MPI cars (1993-1999) - 3 pin round diagnostic connector - 1x36 pin connector, sometimes also 1x18 pin connector - lines in the lid, but no screws in the lid - vacuum connector next to first plug

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MEMS 1.9 ECU

Used in MPI cars - 16 pin "OBDII/OBD2" style diagnostic connector - cross on top, vacuum line next to the main connector

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MEMS 2J ECU

Uused in Mini MPIs and cars with VVC - 16 pin "OBDII/OBD2" style diagnostic connector - 2x36pin connectors, left black, right red - large X in the lid - no vacuum connector

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