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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

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  #1  
Old 02-25-2011, 12:27 PM
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Troubles in River City, ABS? Battery?

Hi all,

Not sure if this is all related, but for the past 6 months my ABS light has been on, Its on my bucket list….....So I did a brake job last week Pads/Rotors, and the ABS light comes and goes off now, The first time it went OUT was when the battery went down, do to me working on the inside, and also doing some tests with key in #2 Pos. I charged it up and after a few miles Its back on, and now the car will not shift to 3rd or 4th. Today I cleaned the RF sensor (was bad) and clean some other stuff related to the ABS wires, also tested the Sensor, and came out good..…..... OK, so now I have no ABS light on, but when I step on the brakes it sounds awful, kinda like the ABS wants to work, and weird braking too. I turned off the ABS and brakes work fine now, but still will not up-shift to 3rd/4th. Any Ideas??? Could this be a Battery issue?? FYI, this morning all was ok, no problems, just when I went back out it would not shift.

Thanks to all…......

UPDATE: I did a transmission reset for the adapitve values that are stored in it. To do this, turn the key to position 2 (all the way without starting) and then push the pedal to the accelerator to the floor for 2min... This seem'd to correct my shifting problems, but now ABS lights are on. (no brake light)

"thank gawd for Scotch"
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Last edited by Rustyzipper; 02-25-2011 at 01:46 PM.
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  #2  
Old 02-25-2011, 02:34 PM
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UPDATE 2:

back to square one, The ABS lights are out, but my Braking Problem is back, and not shifting to 4th. GRRRRRRRRRRRR!!!!!!!!
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  #3  
Old 02-25-2011, 04:13 PM
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try disconnecting the batt. for a bit, and then hook it back up. see what happens. as for your abs, either you need new brake sensor wires or the abs module is going out.
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Old 02-25-2011, 05:43 PM
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Thanks for feedback,

But brake sensor wires ??.. like in Brake Sensor??.. why that??, or did you mean ABS sensor??

Thanks.
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  #5  
Old 02-25-2011, 05:55 PM
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my bad rusty, i miss read, it's possible that your abs module is on it's way out, maybe want to check out the best links, i know it's rebuildable, it could be that the ligh comes on and the car may be tring to go into a fail safe mode.
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Old 02-25-2011, 06:03 PM
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Thanks lild,

Just replaced the Battery, and left it un-connected for 30 mins, still Braking is bad, like I'm on ice or something, also, the dang thing will not shift up past 3rd gear....
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Old 02-25-2011, 06:17 PM
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deff. sounds like your abs module is acting up. as for the upshift, either the car thinks it needs to be in fail safe, or you may have a selinod going bad on the tranny. i remeber some folks haveing this problem a while back, it's a simple fix, i think it is located on the outside of the tranny, i just can't remember the details.
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Old 02-25-2011, 06:24 PM
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Quote:
Originally Posted by Rustyzipper View Post

UPDATE: I did a transmission reset for the adapitve values that are stored in it. To do this, turn the key to position 2 (all the way without starting) and then push the pedal to the accelerator to the floor for 2min... (sorry, this is a FALSE rumor that seems to persist...see FYI below for explanation)
As far as your ABS (not sure how you were "turning it off") light being illuminated...and it seems as if you're driving on ice...have you checked your rear wheel speed sensor? If this is going bad...it can affect the ABS & EGS (tranny) systems...or as other's mentioned...your ABS module could be toast. You can see in the info below...how the rear wheel speed sensor's data is used by other control modules/systems.

Good luck.



FYI:
the "reset" you mention is NOT true (as you found out as the problem came back). This is a misguided false rumor that seems to "get" owners that run across it in old threads. The only thing you are doing by following this "false" procedure is...you're tricking AGS/ATC (adaptive transmission control) to think that you are driving "agressively"...so ATC will engage the sport mode (where upshifts occur at higher RPM to take advantage of the engine"s power). These driver influenced adaptations are NOT STORED...and when the car is restarted...the driver influence is also restarted. The car wouldn't be "adaptive" if it stored an agressive driver's pattern, then if you're grandma got behind the wheel and was a very timid driver...the car would be jumping out of it's skin...but it adapts within seconds by adjusting to the way the accelerator pedal is being used & the steering wheel.





(the "FALSE" adaptive reset that many think they are doing...is actually only tricking ATC into the "sport mode" mentioned below)

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Last edited by QSilver7; 02-25-2011 at 06:35 PM.
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  #9  
Old 02-25-2011, 06:33 PM
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Thanks Silver,

.....I just un-pluged the ABS under the hood, and Now it brakes ok, but still not up-shifting to 4th. GRRR....Thinking it is not the ABS module at this point.

Also mine was born on 4/96 so not sure if that is the same.....heck my ABS module is under the glove box.

Back to the drawing board... and on to the rear wheel speed sensor.

THANKS!!
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  #10  
Old 02-25-2011, 06:45 PM
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it would be the module, if you pluged it back up and got the same brakeing problem. what you describe earlier is the anti lock brakes acting funny.
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Old 02-25-2011, 07:30 PM
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Quote:
Originally Posted by Rustyzipper View Post
mine was born on 4/96 so not sure if that is the same.....heck my ABS module is under the glove box
For the life of us, we just can't get ANYONE to annotate the photos below of the older-style ABS control module connectors showing WHICH PINS are the ones to test for each of the four wheel speed sensors!

Do you think, when you're done, you'll be able to provide that information for the next person who needs to test their sensors on the older E39s?
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  #12  
Old 02-25-2011, 09:57 PM
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Sure Blue, be glad to help... That is my set up to a "T"...and thanks for all your help, in many ways on here.

... you would think a code or two would be popping up with all of this... but none.
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Last edited by Rustyzipper; 02-25-2011 at 10:01 PM.
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  #13  
Old 02-25-2011, 11:03 PM
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Quote:
Originally Posted by Rustyzipper View Post
That is my set up to a "T"...
I don't know how good it is, but I tried to list the pinouts for the older E39s in that thread if you don't already have the pinout for the connector.
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  #14  
Old 02-26-2011, 07:41 AM
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Going to swap around the front wheel sensors today, at least that may tell me something.

... I see that my voltage on the frot right sensor is only about 1.3 volts.
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Old 02-26-2011, 10:10 AM
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Ok, so I have the front sensors out, The FR tests 1.000 volts, and the FL is at OL both ways, Meaning its a goner..... MY question, would the LF sensor make all the problems??? no shifting, and bad braking???, or am I looking at something else??.

going to order 2 new ones and go from there....

...now on to the back Sensor, see what we find there.

Any thoughts???

Thanks all.....
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Last edited by Rustyzipper; 02-26-2011 at 10:19 AM.
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  #16  
Old 02-26-2011, 11:23 AM
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UPDATE:

LR sensor reads 0.826 one way and 0.677 the other??? are they toast???

FYI, a real B@8ch to get out, not like the front.


Thanks

UPDATE: 10,023

OK, all sensors are back in, everything works fine, just the ABS light on, do to the bad sensor....only drove it for 15 mins, so we will see.

UPDATE: 10,024

Just took her for a spin and will not get out of 1st gear, and horrific braking.....

GRRRRRRRR!...... do the BMW gods test us???
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Last edited by Rustyzipper; 02-26-2011 at 01:32 PM.
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  #17  
Old 02-26-2011, 03:32 PM
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Quote:
Originally Posted by bluebee View Post
For the life of us, we just can't get ANYONE to annotate the photos below of the older-style ABS control module connectors showing WHICH PINS are the ones to test for each of the four wheel speed sensors!

Do you think, when you're done, you'll be able to provide that information for the next person who needs to test their sensors on the older E39s?

Not sure if this will help, but its pretty detailed.

http://ww2.justanswer.com/uploads/bm...2-53-22_pm.png
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  #18  
Old 02-26-2011, 04:19 PM
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Quote:
Originally Posted by Rustyzipper View Post
Not sure if this will help, but its pretty detailed.
Well, I could easily annotate & describe the procedure for the older E39 if I only knew these things:
  1. Which connector (of the two shown) is the one to test?
  2. Where is that connector located (under the glovebox or in the engine bay)?
  3. What is the numbering scheme of that connector?
  4. What are the numbers for each wheel speed sensor, forward and reverse biased?
According to the picture you posted, the connector is an "88 pin" connector "X1171". If that's correct, I'm guessing that is the lower of the two connectors in the photo (because the upper connector can't have 88 pins).

I'm also guessing that this connector is the one under the glovebox and not the one in the engine bay. Is that right?

For the numbering scheme, can someone with the older E39's see if there are any numbers stamped on the connector itself? Which pin is #1 and which is #88?

Once we have that, all we need to know is that the sensors are at:
  • Left front wheel speed sensor (pins #35 & #10)
  • Right front wheel speed sensor (pins #14 & #15)
  • Left rear wheel speed sensor (pins #12 & #13)
  • Right rear wheel speed sensor (pins #18 & #11)
In summary, I could annotate the procedure for the older E39s if I only knew:
  1. Which connector?
  2. Where is that connector?
  3. Where is pin #1 and where is pin #88 on that connector?
  4. Then, I could label pins #10, #11, #12, #13, #14, #15, #18, & #35.
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  #19  
Old 02-26-2011, 04:51 PM
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[QUOTE=bluebee;5878537]Well, I could easily annotate & describe the procedure for the older E39 if I only knew these things:

/QUOTE]

Yep, Its from the older 5.0V
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  #20  
Old 02-27-2011, 01:35 AM
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Well, putting it all together, I think, for the older E39s, here's the relevant pinout for checking the voltage drop and resistance across the four wheel speed sensors.

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  #21  
Old 02-27-2011, 07:53 AM
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That is great blue, good job... Nice info too QSilver.

Live and learn, at this rate my head is going to explode.
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Last edited by Rustyzipper; 02-27-2011 at 07:56 AM.
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  #22  
Old 02-28-2011, 11:59 AM
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Quote:
Originally Posted by Rustyzipper View Post
at this rate my head is going to explode.
It's painstaking work, especially since I don't have the older E39 ABS control module setup, but working together, we came up with this helpful picture for others to test the four wheel speed sensors from under the glove box.

Note that I added what appears to be the power and ground pins because lots and lots (and lots) of people say they get no readings at all.

For example, see this post today:
- ABS light came on and now speedo is doing weird stuff.

Is it reasonable, in those cases where the user gets no readings, to ask them to test continuity between the ground pin and body metal?

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