I am trying to connect to the diagnostic port of a 97 Japanese mini using the Rover MEMS app. It will not connect. I have looked at the wiring diagrams in Haynes and it would appear from the colour of the wires that the wiring relates to a pre Oct 96 fuel injected model with the wire colours at the port being Pink/Black, White/Yellow and Black/Green. I believe that the White/Yellow carries the data from the ECU and the other two are live and ground. Is this correct? When I test the pins with a volt meter, none of them are live. I have checked all the usual, fuses, connections etc. Should the Pink/Black be live? or do I need to connect to separate Live and ground externally. I would be most grateful if someone could help.

Diagnostic Port On Japanese Mini
#1
Posted 08 April 2024 - 09:05 AM
#2
Posted 08 April 2024 - 01:24 PM
I had no end of grief trying to connect to my Japanese 94 with Windows 10. Can't say I ever looked at wiring. I eventually found some drivers online which would work once or twice, then I would have to uninstall the COM port and mess around from the start again. Eventually bought an android tablet so I could try that route, somewhat more successful, but doesn't have the same graphical interface.
Sorry, not exactly helpful, just feeling your pain.
#3
Posted 08 April 2024 - 06:14 PM
Thanks for that. I really need someone who knows the wiring on diagnostic port
#4
Posted 09 April 2024 - 11:09 AM
Am I right to assume the '97 Jap mini changed to the OBD2 connector and not the 3 pin pre '96 connector. On the ARC4 SPi lead (3 pin) there is an extra lead with a crocodile clip to connect to a positive on the car which would suggest that none on the three are positive but one is negative. I bought my MEMS lead from somebody on here and if I remember correctly it doesn't have the positive connection.
#5
Posted 09 April 2024 - 01:12 PM
Not sure but mine has the old school 3 pin connector under the bonnet. The connector lead I purchased does not have the extra lead to connect to +ve.
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