Hey guys;

I have some issues with my Mini that I suspect may be due to erroneous wheel spin information being sent to the ECU. During my search for answers I stumbled across a YouTube video of a guy who was using wheel spin sensor software that reports wheel spin in real time. This was for a BMW. Does anybody know which software this is?


Wheels speed sensor software

The screenshot is from this video:

My symptoms...

I hear a "crushing" sound when turning and accelerating at the same time. For example, leaving a parking space. This symptom happens both forward and backward. If you've ever driven a vehicle on asphalt with locking differentials, it kind of feels like that. It also sounds like ABS brakes when you slam them on ice - that kind of "crushing" sound that comes from the rear wheels. Assuming my 2011 Mini Cooper Countryman S All4 does NOT have a rear locking diff, I'm looking at erroneous ABS activity.

Points worth mentioning:

* Unplugging the multipin connector from the rear diff stops the problem.
* Removing the ABS fuse stops the problem.
* Disabling DTS (long press of DTS button) does NOT stop the problem. BUT, I get a Trouble Code A3B9 which is "CAN ID 19E ERROR Failure Message Status DSC." This ambiguous error message leads me to believe that MAYBE my long press of the DTS button is malfunctioning?? Searches for this code have lead nowhere.
* Disabling DTS (short press of DTS button) does NOT stop the problem.

Car information...

* Car battery is new (less than a year old)
* Voltage is good; 14.1VDC
* Rear driver side CV axle was replaced within the month of getting the car. The symptoms existed BEFORE replacing the axle. The other axles look good. So it's not a CV axle issue.
* I discovered that the driver-side rear tire was different from the other 3. It was about 1/2" taller.



Maddening that some idiot would install a wrong-size tire on a 4WD vehicle. Even more maddening that I didn't notice it. So I'm considering that the tire size difference may have possibly caused damage to the rear differential.

After about a year of modifying my driving to never accelerate while turning, I'm finally ready to take this problem on head on.

My new theories:

* I'm thinking that one or both of the rear brakes is locking up in some kind of erroneous attempt to control a traction situation that doesn't exist. So I think it makes sense to start at the wheel sensors.
* I'm exploring the possibility that this may be the traction ECU, but I want to start by monitoring wheel spin (Hence this post).

Here's another guy who experienced the same exact symptoms, but never solved them. It's a super crappy video, but you get the point:


Thanx for any help anybody can give.

D