Connection is via a proprietary 10 pin socket above the radiator on the
RHS side of the machine.
Communication is 3 wire OBDII K-Line adhering to ISO 9141-2 physical layer and protocol ISO 14230 KWP2000 (Keyword Protocol 2000).OBDII Specification BMS and Socket Information
Software for the GS is the only component yet to be resolved and documented. While the physical and protocol layers are as per OBDII with extensions, the addresses for each component are different. Open source software should be able to be modified easily to perform fault code read out and clearing of fault codes. See the software page for further information on this subject.
Some BMW factory and dealer software is discussed in enthusiast forums on-line but use of the software
be questionable & perhaps not recommended. The factory software would enable complete reprogramming of modules & could result in inoperable ECU's so caution would be advisable.
There are two commercial products for diagnostics on the 650GS. They are the GS911 and the MT1
The GS911 has been under development for many years and provides access to diagnostics information while on the road via bluetooth to a mobile phone and a PC system back in the workshop.
This tool is all most owners would need and is reasonably priced
Chinese clones are being offered on ebay so be wary of cheap prices
The MT1 has been developed by a C1 enthusiast in the UK, it has an inbuilt display. Little is known about the capabilities of the device with regard to the 650GS and other BMW models beyond the C1.