Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

Reply
 
Thread Tools Display Modes
  #1  
Old 02-23-2012, 10:49 PM
kingbob kingbob is offline
Registered User
Location: UK
 
Join Date: Feb 2012
Posts: 10
Mein Auto: BMW 540 Individual
E39 540 DSC Light On NOT ABS!

Hi all

My e39 540 DSC light is permanently on. All the searches refer to the ABS and DSC light on, but mine is just the DSC light on. The car has recently had new front discs/pads/pad sensor, brake fluid, battery, climate resistor, but the light was on before that anyway.

A few other searches suggest various wheel/speed sensors, but the speedo works fine as does the cruise control and all other functions/features on the car.

Other searches suggest ABS module, but then surely ABS light would be on as well? ABS 100 % works, no other warning lights on, just getting a little annoying every time I put my foot down hard I chirp the tyres, not too bad in the dry, not great in the wet though lol. I had a mate pop round with a laptop & data cable plugged it in somewhere under the dash, no faults found! I'm baffled! Anybody with any ideas before I have to take car to the garage?

Thanks in advance
Reply With Quote
Ads by Google
  #2  
Old 02-23-2012, 11:21 PM
bobdmac bobdmac is offline
Officially Welcomed to the 'Fest
Location: Back in Oaktown, Yay Area
 
Join Date: Feb 2011
Posts: 2,466
Mein Auto: 2001 540i/6, '90 BMW k75s
Is it possible you accidentally disabled it by pushing the DSC button on your MID panel?
__________________
BMW--giving new meaning to the phrase "disposable income."
Reply With Quote
  #3  
Old 02-23-2012, 11:31 PM
kingbob kingbob is offline
Registered User
Location: UK
 
Join Date: Feb 2012
Posts: 10
Mein Auto: BMW 540 Individual
Quote:
Originally Posted by bobdmac View Post
Is it possible you accidentally disabled it by pushing the DSC button on your MID panel?
I've pressed the DSC button several times but the DSC light is still on. Also reading the manual when the car is switched off, if working properly the system the DSC will be 'on' by default so the DSC light would be out when starting the car. Thanks for your help anyway.
Reply With Quote
  #4  
Old 02-23-2012, 11:33 PM
bobdmac bobdmac is offline
Officially Welcomed to the 'Fest
Location: Back in Oaktown, Yay Area
 
Join Date: Feb 2011
Posts: 2,466
Mein Auto: 2001 540i/6, '90 BMW k75s
Maybe it's a problem with the switch. I guess I'm hung up on this because it's hard to imagine the DSC function failing in isolation, without any other apparent issues.
__________________
BMW--giving new meaning to the phrase "disposable income."
Reply With Quote
  #5  
Old 02-24-2012, 04:41 AM
pshovest pshovest is online now
Officially Welcomed to the 'Fest
Location: DE
 
Join Date: Dec 2009
Posts: 516
Mein Auto: '10 535iA, '00 528iTM
There are at least 2 sensors that only affect DSC......steering angle and yaw rate accelerometer. The steering angle sensor error sometimes occurs after a front end alignment is performed.
Was your mate able to read the DSC module with his laptop connected? Do you know what software he was using? If your e39 has the underhood diagnostic plug you must use it, not the underdash connector, to read all modules.
The DSC light is also characteristic of having a used but uncoded DSC module installed.

http://forums.bimmerforums.com/forum...+code+used+dsc

Paul S
BMW CCA 69606
Reply With Quote
  #6  
Old 02-24-2012, 05:16 AM
kingbob kingbob is offline
Registered User
Location: UK
 
Join Date: Feb 2012
Posts: 10
Mein Auto: BMW 540 Individual
Quote:
Originally Posted by pshovest View Post
There are at least 2 sensors that only affect DSC......steering angle and yaw rate accelerometer. The steering angle sensor error sometimes occurs after a front end alignment is performed.
Was your mate able to read the DSC module with his laptop connected? Do you know what software he was using? If your e39 has the underhood diagnostic plug you must use it, not the underdash connector, to read all modules.
The DSC light is also characteristic of having a used but uncoded DSC module installed.

http://forums.bimmerforums.com/forum...+code+used+dsc

Paul S
BMW CCA 69606
Sounds like it could be the steering angle or yaw rate accelerometer. I wasn't aware there was an underhood diagnostic plug under the hood as well. Looks like it's a trip to the garage. Most garages where I live in the UK are quoting 60 just to read the codes, looks like I will have to pay up!
Reply With Quote
  #7  
Old 02-24-2012, 05:51 AM
pshovest pshovest is online now
Officially Welcomed to the 'Fest
Location: DE
 
Join Date: Dec 2009
Posts: 516
Mein Auto: '10 535iA, '00 528iTM
There are very likely other reasons also, my point was there are indeed reasons for only the DSC light to be lit, rather the the more common DSC/ABS/BRAKE light trio. Only e39's built before ~7/2000 have both the underhood and underdash connectors. Later US cars only have the underdash connector, not sure if these dates apply to the rest of the world.

Paul S
BMW CCA 69606
Reply With Quote
  #8  
Old 02-24-2012, 07:05 AM
bobdmac bobdmac is offline
Officially Welcomed to the 'Fest
Location: Back in Oaktown, Yay Area
 
Join Date: Feb 2011
Posts: 2,466
Mein Auto: 2001 540i/6, '90 BMW k75s
Good info, Paul.
__________________
BMW--giving new meaning to the phrase "disposable income."
Reply With Quote
  #9  
Old 02-24-2012, 07:26 AM
kingbob kingbob is offline
Registered User
Location: UK
 
Join Date: Feb 2012
Posts: 10
Mein Auto: BMW 540 Individual
Quote:
Originally Posted by pshovest View Post
There are very likely other reasons also, my point was there are indeed reasons for only the DSC light to be lit, rather the the more common DSC/ABS/BRAKE light trio. Only e39's built before ~7/2000 have both the underhood and underdash connectors. Later US cars only have the underdash connector, not sure if these dates apply to the rest of the world.

Paul S
BMW CCA 69606
My production date is 2000-04-07, so I assume I have both? Do you have an image of what the underhood connector looks like?
Reply With Quote
  #10  
Old 02-24-2012, 07:49 AM
pshovest pshovest is online now
Officially Welcomed to the 'Fest
Location: DE
 
Join Date: Dec 2009
Posts: 516
Mein Auto: '10 535iA, '00 528iTM
Look at posts #11 & 13

http://forums.bimmerforums.com/forum...d.php?t=907448


Paul S
BMW CCA 69606
Reply With Quote
  #11  
Old 02-24-2012, 09:26 AM
kingbob kingbob is offline
Registered User
Location: UK
 
Join Date: Feb 2012
Posts: 10
Mein Auto: BMW 540 Individual
Quote:
Originally Posted by pshovest View Post
Look at posts #11 & 13

http://forums.bimmerforums.com/forum...d.php?t=907448


Paul S
BMW CCA 69606
Cheers, nice and clear!
Reply With Quote
  #12  
Old 10-29-2012, 03:14 PM
kingbob kingbob is offline
Registered User
Location: UK
 
Join Date: Feb 2012
Posts: 10
Mein Auto: BMW 540 Individual
Took the car to the garage, the issue was the steering angle sensor. Garage reset it car now driving fine
Reply With Quote
  #13  
Old 10-29-2012, 03:59 PM
pshovest pshovest is online now
Officially Welcomed to the 'Fest
Location: DE
 
Join Date: Dec 2009
Posts: 516
Mein Auto: '10 535iA, '00 528iTM
Thanks for the feedback.
Can you tell us what garage charged you to fix?


Quote:
Originally Posted by kingbob View Post
Took the car to the garage, the issue was the steering angle sensor. Garage reset it car now driving fine
Reply With Quote
  #14  
Old 10-30-2012, 12:35 PM
kingbob kingbob is offline
Registered User
Location: UK
 
Join Date: Feb 2012
Posts: 10
Mein Auto: BMW 540 Individual
Quote:
Originally Posted by pshovest View Post
Thanks for the feedback.
Can you tell us what garage charged you to fix?
The diagnostic and labour to reset the sensor came to 79
Reply With Quote
  #15  
Old 12-08-2012, 05:19 PM
kingbob kingbob is offline
Registered User
Location: UK
 
Join Date: Feb 2012
Posts: 10
Mein Auto: BMW 540 Individual
*Update DSC light on again, ABS & Brake pad light on in yellow, car booked in garage for Saturday
Reply With Quote
  #16  
Old 12-08-2012, 06:20 PM
4given 4given is offline
Officially Welcomed to the 'Fest
Location: Carlisle,PA.
 
Join Date: Jul 2012
Posts: 185
Mein Auto: 1999 BMW 540i auto
I just went through the same crap and it ended up being my alternator.
Reply With Quote
  #17  
Old 12-15-2012, 04:34 AM
kingbob kingbob is offline
Registered User
Location: UK
 
Join Date: Feb 2012
Posts: 10
Mein Auto: BMW 540 Individual
*Update, turned out to be the offside rear ABS sensor 143 diagnose supply and fit
Reply With Quote
  #18  
Old 12-15-2012, 12:15 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 20,512
Mein Auto: 02 BMW 525i M54 auto 130K
Thanks for the update. It would be nice to know what the ohms reading is for the four wheel speed sensors:
- How to diagnose the BMW ABS BRAKE DSC/ASC trifecta (1)

Here's mine, for example:
__________________
Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
Reply With Quote
Reply

Bookmarks

Tags
540i, abs, dsc


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 02:45 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms