Keep your Rover
connected.

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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3 pin diagnostic cable

3-pin Cable - Available to purchase at shop.jmpe.co.uk

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Diagnostic applications
The most up to date diagnostic application is here for Windows/Linux
Diagnostic Web/agent application

Here is a web based diagnostic application that works in Windows/Mac/Linux computers or laptops
Web application

To use an Android device (phone or tablet) then you will likely need to buy an "OTG" adaptor that fits between your device and the main USB cable.
Check which one your specific device needs, and check that it supports "OTG".
Rover MEMS Diagnostic Android application download

There is another Android application here which I have heard mixed results about (this is not mine, don't ask me about it):
Alternative Android app - Rover MEMS Lite

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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3 pin diagnostic cable

3-pin Cable - Available to purchase at shop.jmpe.co.uk

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Diagnostic applications
The most up to date diagnostic application is here for Windows/Linux
Diagnostic Web/agent application

Here is a web based diagnostic application that works in Windows/Mac/Linux computers or laptops
Web application

To use an Android device (phone or tablet) then you will likely need to buy an "OTG" adaptor that fits between your device and the main USB cable.
Check which one your specific device needs, and check that it supports "OTG".
Rover MEMS Diagnostic Android application download

There is another Android application here which I have heard mixed results about (this is not mine, don't ask me about it):
Alternative Android app - Rover MEMS Lite

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Remapping
There is an online editor for ECU maps here: ROM Editor

These ECUs can be modified to allow remaps.
A chip socket is installed into the ECU so that a rewritable chip can be installed.
At the moment it is not possible to use an OBD cable for programming, the chip must be physically removed from the ECU each time and written by using a USB chip programmer.
This takes a good amount of time and should only be done by someone very experienced with soldering and PCB repair work.
1.3 ECU modified ROM chip board and socket:

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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3 pin diagnostic cable

3-pin Cable - Available to purchase at shop.jmpe.co.uk

---

Diagnostic applications
The most up to date diagnostic application is here for Windows/Linux
Diagnostic Web/agent application

Here is a web based diagnostic application that works in Windows/Mac/Linux computers or laptops
Web application

To use an Android device (phone or tablet) then you will likely need to buy an "OTG" adaptor that fits between your device and the main USB cable.
Check which one your specific device needs, and check that it supports "OTG".
Rover MEMS Diagnostic Android application download

There is another Android application here which I have heard mixed results about (this is not mine, don't ask me about it):
Alternative Android app - Rover MEMS Lite

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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16 pin OBD/OBDII/OBD2 style cable

16-pin Cable - Available to purchase at shop.jmpe.co.uk

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Diagnostic applications
The most up to date application is here for Windows/Linux
Web/agent application

This is a web based application that works in Windows/Mac/Linux computers or laptops
Web application

MEMS 2J ECU
Used 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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16 pin OBD/OBDII/OBD2 style cable

16-pin Cable - Available to purchase at shop.jmpe.co.uk

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Diagnostic applications
The most up to date application is here for Windows/Linux
Web/agent application

This is a web based application that works in Windows/Mac/Linux computers or laptops
Web application

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Remapping
There is an online editor for ECU maps here: ROM Editor

It is possible to modify 2J ECUs to allow them to be remapped.
Either a simple version where the chip must be removed for each set of mapping changes, then reintalled,
or a more advanced version where the ECU can be mapped with the chip still installed.
The best place to look for 2J mods is here; https://andrewrevill.co.uk/

MEMS 3 ECU
Used in newer MPI cars with/without VVC - 16 pin "OBD" style diagnostic connector - no vacuum connector

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16 pin OBD/OBDII/OBD2 style cable

16-pin Cable - Available to purchase at shop.jmpe.co.uk

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Remapping
Remapping the MEMS 3 ECUs is possible without modification
Andrew Revill has done an awful lot of work already for these ECUs, you can find his website page about MEMS 3 mapping here which includes all applications needed to start remapping:
https://andrewrevill.co.uk/MEMS3Mapper.htm

General link to the his main website: https://andrewrevill.co.uk/

There is also an online editor for ECU maps on my website here: ROM Editor

RC5 Airbag/SRS Module
Used in MPI and JDM Minis as well as other Rovers

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16 pin OBD/OBDII/OBD2 style RC5 cable
16-pin RC5 Cable - Available to purchase at shop.jmpe.co.uk

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Diagnostic applications
The most up to date application is here for Windows/Linux
Web/agent application

This is also a web based application that works in Windows/Mac/Linux computers or laptops
Web application

There is also an Android application, you will likely need to buy an "OTG" adaptor that fits between your device and the USB cable.
Rover MEMS Diagnostic Android application download

5AS Immobiliser
Used in many Rovers including SPI and MPI Mini

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Check Andrew Revills website for support

Bosch 5.3 ABS
Used in MGF and other cars

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16 pin OBD/OBDII/OBD2 style ABS cable

Bosch ABS 5.3, 16-pin cable - Available to purchase at shop.jmpe.co.uk

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Diagnostic applications
This is a web based application that works in Windows/Mac/Linux computers or laptops
Web application