Hi everyone, I have a 2016 F55 radiator fan that is not turning on (low or high speed), so I removed it from the car to test just the fan itself. I plugged in 12V directly to the wiring harness as shown in the attached photo, but the fan did not move at all. I read that the 2nd gen Mini has a radiator fan resistor that can break and can cause the fan not to turn on. However, I can not find any information about the radiator fan resistor for 3rd gen (F55). I would appreciate if someone can point me to the right direction, so I can continue debugging. Thanks a lot.

fan harness

fan wiring harness

f55 radiator fan

 

The third pin on that connector is for the DME to send a signal to the controller that is built into the fan motor which activates the fan
The proper way to test would be to use a BMW specific diagnostic software (like INPA) where you can command the fan to turn on.

 

Thank you, Mr. Bean. For the diagnostic software, I have a $200 OBD2 scanner, but it only scans and clears codes. It does not allow me to turn on/off the radiator fan. From my research, there is a youtuber who used Autel MK908 to turn on/off the radiator fan, but that device costs $1800. Can you recommend a tool that can turn on/off the radiator fan at a more reasonable price, so I can debug my radiator fan?

 

Your cheapest option is probably to buy a cloned BMW ICOM for $150 and download INPA for free. BUT - and this is a big but - This software is notoriously finicky to set-up and get it working correctly.
There are other options but since your car is relatively new, those options are limited. I think Carly might work for you'll want to do some more homework on that (I have no experience with it).

 

hi, did you find the issue with this going through the same problem

 

Hi, did you manage to find a fix for this as i am now having the same issue.

 

hi did you manage to sort this problem as im now having the same issue