Hey guys, 

Considering theres a lot of confusing wiring diagrams available for the Motogadget Mo.Unit blue but none really seemed to do the trick for me, I build and tested a wiring diagram for the BMW K1100RS 1994+, and hopefully this will make everyone's electronic struggles a bit easier. High resolution PDF can be downloaded HERE.

Please note the O2 sensor is left out in this case as we mainly deal with European bikes that do not have the O2 sensor included. If it's included, please wire it to motronic Pin #30, ground and switched 12V as per original diagram. 

Handlebar inputs are expected to give a ground to the Mo.Unit input. 

Please note that the fuel relay can NOT be eliminated. I have seen diagrams where the pump and injectors are wired to 12V ignition output of the Motogadget Mo.Unit blue, but the Mo.Unit does not have the desired output current to get the pump to deliver adequate fuel pressure this way (we tried and we broke our head over this!)

We will add a version for the 8V K100 and K1100 models in the future. 

Happy installing!

Thanks for posting!

Hi  @TimJacques thanks very much for this!

You wouldn't happen to have the 8V K100 diagram available would you?

Cheers

Great info for those who might need it! Thanks.

I have moved the topic from Troubleshooting - Electrical, to the more appropriate, How to - Article from you telling others how to do a specific job.

What a great resource to share!

TimJacques wrote:Hey guys, 

Considering theres a lot of confusing wiring diagrams available for the Motogadget Mo.Unit blue but none really seemed to do the trick for me, I build and tested a wiring diagram for the BMW K1100RS 1994+, and hopefully this will make everyone's electronic struggles a bit easier. High resolution PDF can be downloaded HERE.

Please note the O2 sensor is left out in this case as we mainly deal with European bikes that do not have the O2 sensor included. If it's included, please wire it to motronic Pin #30, ground and switched 12V as per original diagram. 

Handlebar inputs are expected to give a ground to the Mo.Unit input. 

Please note that the fuel relay can NOT be eliminated. I have seen diagrams where the pump and injectors are wired to 12V ignition output of the Motogadget Mo.Unit blue, but the Mo.Unit does not have the desired output current to get the pump to deliver adequate fuel pressure this way (we tried and we broke our head over this!)

We will add a version for the 8V K100 and K1100 models in the future. 

Happy installing!

Hi Tim,
It’s so helpful that you spent the time to prepare and test your diagram. I have bought a copy from Powerbrick and am about to have a crack at rewiring my own K1100 LT 1995 following your diagram. 

My completed bike will be modified from standard and minus the ABS. I will be using Motogadget push buttons, LED lighting etc so fairly well modified compared to original which is why I decided to use mo.unit.

Apologies if I am asking a dumb question or two, but could you please tell me how to identify the terminals within the motronic unit? I guess it must pull apart to give access to the wiring terminals, but before committing to that, I wonder how to identify the terminals that you call up as ‘15’ and ‘33’ in particular. I have compared your diagram with the factory wiring diagram and wire colours / functions, but these two terminals don’t seem to match up. Are the terminals numbered inside the housing, or is there a pinout diagram that provides the key?

Hoping you can shed some light here. Thanks for your time. David.