Are you seeing the DSC kicking on when you are breaking and experiencing this issue?

Also, it is very common to have the module fail (I had mine repaired a couple years ago) so it could be time to send it out and see if that fixes your issue.


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The light is always on so I don't see it kick on or off. I'm wondering if its possible for the DSC and/or the ABS could be causing my issue. It seems to come and go erratically.

 

Could be. There have been a couple of cases where the DSC was applying brakes when it should not have.

 

Is there a DSC fuse I can pull to totally disable the system until I can get a more permanent fix?


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Not sure what to tell you the first time I tried to help someone I got them to unplug the DSC/ABS module. So there was no change which convinced me that it was a brake issue so I took him through the steps and none worked. Basically I wasting his time because I was wrong. He sent out his module for repair and that was in fact the issue. I have no idea how it could still happen with the module unplugged. The guy who rebuilt it said(second hand so don't quote me) that they are like mechanical switches and if the switch is on when you unplug it stays on.

Sorry really have no idea I have never seen one of these in person and it all sort of baffles me. Even though this did not work I would unplug the module it is the same as pulling fuses.

 

Just note you can't pull 31 because it is also the fuel pump.

 

After ruling out the brakes, it is almost certain your issue is in the ABS/DSC. The electrical part of the module controls a bunch of solenoids in the back half of the module which open/close valves that control brake pressure to each wheel. So an electrical problem in the module can result in a valve being stuck open and sending too much pressure to a wheel.
You can pull off the electrical part of the module, cover the mechanical part to keep it dry, and send your module off for refurb. OK to drive with the module out, you just won't have ABS/DSC function of course and you will get trifecta lights and an SES light.

 

Think you might have mentioned the key to diag. Since we do know that removing the whole module will leave the brakes in working order where as unplugging does not seem too.
I think if I was suspicious of the module, the first step would be to remove it and drive the car. That is a good bit easier than even getting the car up and the wheel off to start checking the brakes functionality. Of coarse if there is nothing wrong with the caliper etc checking functionality is even more tedious.

 

As of now I only have the unit unplugged, assuming from sailors post the mechanical switch seems to be in the off or open position as I haven't had an issue since. But I think for good measure I'll go ahead and just remove the module all together this weekend. It's strange that I never got any sort of ABS or BRAKE light when this problem came up, just the DSC light which at the time I thought affected traction control only. I never realized it tied into the ABS. The more you know.....


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Where are people having DSC modules repaired?

 

I searched and found modulemaster.com. Think they have a 5yr warranty. $300


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I used BBA Repair. Check eBay for their service. You can pick it up for ~$100 or so


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From Bluebee's comprehensive thread (2009):

PRICE REBUILDING OF YOUR ABS MODULE:
- Module Masters ($105) http://www.modulemaster.com/en/abs/ate_bmw_asc.php
- BBA Remanufacturing (8 days, $225) Home (GB) | BBA Reman
- Auto & Truck Electronics ($105) EBAY seller's ID ATE1234, lifetime warranty, free shipping, quick turnaround
- Note: A rebuild of your ABS unit won't require VIN coding, activation, or steering angle calibration

 

Are you sure about the coding etc? I thought I read somewhere if you don't get the exact part number you took off you'll have issues...?


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BBA Reman on ebay

Bosch 5.7 DSC Module ABS Module Repair Service | eBay

Confirmed that no coding is required. Just sent in my unit, they repaired in a day and mailed it back.

 

Good deal, did you have actual ABS or BRAKE lights on the dash I assume?



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