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 12-02-2012, 01:28 PM
poolman poolman is online now
Officially Welcomed to the 'Fest
Location: martinsville va
 
Join Date: Nov 2005
Posts: 3,866
Mein Auto: 525i station wagon
Wheel sensors

Took some time today to go after the lights coming on the dash--Trifecta--The back sensors were worked on this afternoon and they were really crudded up. The one on the drivers side had light scratch marks across it --I saw the scratches after I had given it a good cleaning. I replaced that one with a new one I had on hand. Test drove and the lights stay off--drove all over the place and no lights--got home and parked the car and they came on again--Went for another test drive and No lights again.
Here's my question--I cleaned one sensor and replaced the other--the crud was bad on both so I spray some brake cleaner down the sensor wells to try and clean up in there--question should I have turned the rotor's while doing this to make sure I cleaned all around the hub where the sensor gets it's info--of course I should but how do you do this with only one wheel off the ground--?
Reply With Quote
Ads by Google
  #2  
Old 12-02-2012, 04:40 PM
JimLev JimLev is offline
Officially Welcomed to the 'Fest
Location: MA
 
Join Date: Dec 2003
Posts: 3,641
Mein Auto: 540/6, S60 Volvo, Tribeca
You should be able to turn either rear wheel with the other one the ground as long as the tranny is in neutral or you don't have an LSD diff.
__________________

2000 540/6 Slightly tweeked...everywhere
Reply With Quote
  #3  
Old 12-02-2012, 06:12 PM
poolman poolman is online now
Officially Welcomed to the 'Fest
Location: martinsville va
 
Join Date: Nov 2005
Posts: 3,866
Mein Auto: 525i station wagon
Thanks Jim--I thought about this later after I had cleaned up and all--still hitting myself in the head for not thinking it out while I was in it--Oh well--At least the lights are out most of the time now instead of being on all the time--was getting ready to ship out the ABS control for the work to be done on it--I'll drive to work this week and try to redo what I missed next weekend.
Reply With Quote
  #4  
Old 12-03-2012, 09:25 AM
540iman's Avatar
540iman 540iman is offline
resident, old fart
Location: N.W. Indiana
 
Join Date: Sep 2008
Posts: 1,504
Mein Auto: 2002 540i sport
Hope you let contact cleaner dry well before driving. No need to rotate wheel at all to clean sensor. I would remove and clean tip and dry. Scratches are not good. Not necessarily killer either. I wouold tell you to do multi-meter test, but it is in here many times and do if you believe what I say or do your own thing. Error after driving short distance points more to module getting even a little heat. Solder connections go bad and slightest temp change can make them good and bad. Your good candidate for BBa re-build. Do not replace any more speed sensors till you can remove yours, clean with dry, soft town on end and contact cleaner inside boxes where they have pigtails connecting with blue connector to cable. That box will be full of **** you can clean out and spray your contact cleaner here.
Reply With Quote
  #5  
Old 12-03-2012, 12:26 PM
bluebee's Avatar
bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,112
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by poolman View Post
I thought about this later
Makes me remember that I always wanted four jack stands (I only have two serviceable ones) so I can work on all four wheels at once!

I know you know about the ABS test procedures from 540iman, but, for others, they're outlined in detail here:
- How to diagnose the BMW ABS BRAKE DSC/ASC trifecta (1) & why the 5-minute ABS DIY quick test doesn't always work, especially on brand new non-OEM wheel speed sensors, by Quick99Si (1)

Quote:
Originally Posted by poolman View Post
was getting ready to ship out the ABS control for the work to be done on it.
I know you've been on a long time so I might be preaching to the choir but, as Bill noted below, you don't mention wheel speed sensor DMM test results - so I'm curious whether you've run that test. Also, there 'are' six other tests of the wheel speed sensors - but again - I know you know about them so I'm just curious.

And, you probably know that BBA is best and that they run $98 Ebay specials (apparently including two-way shipping), so, if the module does go out for a fix, that's the way to go.

Lastly, if/when you do send it out for repair, my suggestion is to mark the unit's two black boxes (on the back) to see if they replace them, and, to ask, while your unit is on the test jig, what they find and what they fixed (we all want to live vicariously through you and others).

Quote:
Originally Posted by 540iman View Post
I would tell you to do multi-meter test, but it is in here many times and do if you believe what I say or do your own thing.
I'm curious about the results too. Mine are below. I think consistency is the key thing to look for in good sensors.


Quote:
Originally Posted by 540iman View Post
Error after driving short distance points more to module getting even a little heat.
I realize I'm not adding much value here - as everyone on this thread is a regular - but I wonder if there is a "cold" freeze spray that Poolman can shoot onto the ABS control module when the trifecta lights up. Most people go the other way (hair dryer) to make the lights turn on - but it would be diagnostically useful if Poolman could cool his ABS control module when the lights do go on.
__________________
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
  #6  
Old 12-03-2012, 02:49 PM
540iman's Avatar
540iman 540iman is offline
resident, old fart
Location: N.W. Indiana
 
Join Date: Sep 2008
Posts: 1,504
Mein Auto: 2002 540i sport
Don't use brake cleaner to clean electrics! Much too harsh. Use contact cleaner for electronics and use brake cleaner to take grease off anything as it is potent.
Reply With Quote
  #7  
Old 12-04-2012, 08:27 AM
doru's Avatar
doru doru is offline
Officially Welcomed to the 'Fest
Location: Calgary
 
Join Date: Sep 2007
Posts: 4,461
Mein Auto: 2003 530iA
Poolman, when I cleaned my speed sensors, I used Q-tips for the receptacles, and the surroundings. Mine were also crudded up, but no trifecta.
I believe that while contact cleaner is a recommended solution for contact cleaning, the wheel sensors are OK with brake cleaner. They are encapsulated, and also they get crudded up by brake dust, rotor particles and road debris. I believe they are sturdy enough to take the brake cleaner. There is no "outside" sensor per se you clean/touch. The sensitive stuff is well protected. Brake dust and rotor shavings that get stuck on to the outside of the sensor might be magnetized, throwing the sensor reading off.
__________________
Looking for a DIY? Parts? Check this out, it might be your ticket
TMS underdrive pullies - Stewart WP - PSS9 - Beisan Vanos seals - Zimmerman cross-drilled & Akebono Euro - Deka 649 MF - 55w HID headlights - 35w HID foglights - Hualigan double din - ACS (rep) alu pedals - Euro central storage console - Breyton Magic Racing staggered wheels - M5 bumper - M5 steering wheel - Tint
Stable: e39, e53, e46 & Tribby
Reply With Quote
Reply

Bookmarks


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 05:12 PM.


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