DSC pump fault (solved?)

R

rich48848

Member
Had the dreaded tripple dash lights and on further inspection found the 5DF0 - Pumpenmotor defekt code.

After a quick google session, I tried the "Tappy tap tap" method and hey presto, no more warning lights!

Got to love the design of that pump not using a brushless motor....

Is likely to be a temporary fix or just down to lack of use over Winter?
 
Yep, it is the carbon brushes sticking which causes an intermittent connection to the stator. It's not so much down to a lack of use, more a lack of using the ABS / DSC as the pump only runs when locked up or losing traction so it's a good idea to exercise either / or every month or so. This video will show you exactly what the problem is...

https://www.youtube.com/watch?v=CmCe98MZ-Yw&feature=youtu.be

..and here is how to remove the pump:

https://www.instructables.com/id/BMW-Z4-E86-DSC-ABS-pumpmodule-removal/

tappy tap tap.... is only a temporary fix unfortunately, but will work several times if you are lucky.
 
kunta said:
tappy tap tap?????
Click to expand...

Sorry, AvE reference!

A brisk tap on the DSC motor cover will aparently losen a stuck motor brush...

Its amazing how big corporations strive to make things awkward to repair. Maybe they've never heard of the internet! £1500 is a pretty big incentive to crack open the 'sealed for life' module and get stuck in...
 
ph001 said:
Yep, it is the carbon brushes sticking which causes an intermittent connection to the stator. It's not so much down to a lack of use, more a lack of using the ABS / DSC as the pump only runs when locked up or losing traction so it's a good idea to exercise either / or every month or so. This video will show you exactly what the problem is...

https://www.youtube.com/watch?v=CmCe98MZ-Yw&feature=youtu.be

..and here is how to remove the pump:

https://www.instructables.com/id/BMW-Z4-E86-DSC-ABS-pumpmodule-removal/

tappy tap tap.... is only a temporary fix unfortunately, but will work several times if you are lucky.
Click to expand...

Good guides :thumbsup:

Bookmarked for future reference, it's bound to go one day.
 
ph001 said:
Yep, it is the carbon brushes sticking which causes an intermittent connection to the stator. It's not so much down to a lack of use, more a lack of using the ABS / DSC as the pump only runs when locked up or losing traction so it's a good idea to exercise either / or every month or so. This video will show you exactly what the problem is...

https://www.youtube.com/watch?v=CmCe98MZ-Yw&feature=youtu.be

..and here is how to remove the pump:

https://www.instructables.com/id/BMW-Z4-E86-DSC-ABS-pumpmodule-removal/

tappy tap tap.... is only a temporary fix unfortunately, but will work several times if you are lucky.
Click to expand...

The guy doing the video defo needs to get a tripod! Unfortunately he skips the difficult bits: Getting the motor casing apart and getting it all secured back again. The repair appears to be loads of epoxy all over, a few holes drilled and tapped and then he paints it silver!

Another vid I found talks about drilling holes into the motor casing and breaking off tabs...

It sounds like it would be a lot easier to just cut an access hole in the side of the motor instead of taking it off.
 
rich48848 said:
It sounds like it would be a lot easier to just cut an access hole in the side of the motor instead of taking it off.
Click to expand...

You may well be right, although the swarf might be a concern. I bet the likes of ECUtesting have got it down to a fine art and can do one in minutes. If you do get creative with it, be sure to take pics and share on here.
 
[youtube]https://www.youtube.com/watch?v=6m2H-nC0CqE[/youtube]

some of the pumps also seem to be bolted so would be easier
 
biojo said:
[youtube]https://www.youtube.com/watch?v=6m2H-nC0CqE[/youtube]

some of the pumps also seem to be bolted so would be easier
Click to expand...

Yes I saw that vid. Seems every BMW car and bike suffers this fault.

This german vid shows the dual hole drilling and C clip device used to get the motor case apart. (turn off sound before watching!)

[youtube]https://www.youtube.com/watch?v=43ymjewInd4[/youtube]
 
ph001 said:
rich48848 said:
It sounds like it would be a lot easier to just cut an access hole in the side of the motor instead of taking it off.
Click to expand...

You may well be right, although the swarf might be a concern. I bet the likes of ECUtesting have got it down to a fine art and can do one in minutes. If you do get creative with it, be sure to take pics and share on here.
Click to expand...


You're not wrong :)

http://www.ecutesting.com/catalogue/bmw_eculist.html?category=4047&model=658
 
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