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X5 E53 (1999 - 2006)
The X5 SAV Forum

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  #1  
Old 11-27-2013, 12:51 AM
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AJR1982 AJR1982 is offline
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Mein Auto: 525i 2002 & x5 2002
DIY Brake, DSC, ABS Amber Lights "Trifecta"

I've got the answer for what I believe will cover all AWD BMW models. If you like the information below and would like to donate $5 for my time please click here, and if you have questions please don't hesitate to ask.







Problem: While Bluebee, 540iman and others resolved the practical test for car series 5 and 3, similar methods have not been successful on X5. For test procedure click here

Hypothesis: Rear wheel drive vehicles do not use the same Module as the AWD BMW's. Resistance testing at all wheels resulted in very similar results (984-1013) with two higher resistances in the rear in one direction and (672-687) in the others. (I used a craftsman DMM set to 2MegaOhms.) If same results could be found in any 4 combinations, then those would be the wheel sensors. Disconnecting the sensors at the wheel and retesting at the module should reveal which circuits are for what wheels.

Test: (BMW X5 2002 126xxx) Resistance testing at both, wheels and Female adapter for control module had SIX probable continuity links. According to this picture the following was found to have possible circuit: (13-14 / 28-12 / 30-31 / 15-16 / 36-19 / 42-25). Then I tested those circuits with a single wheel sensor off at a time and gathered the following.
Results:



Please test the following circuits and advise if it worked for you. I will point out that "Diode" mode did not work for me, only resistance.

************************************************** *

Open the hood and remove the air box from the driver side. You will find the ABS Module

Disconnect the ABS Harness Module

And with A DMM test the following circuits (Picture Above)

Test = Resistance = Speculated Location
13-14 = 700-1027 = Left Rear
28-12 = 704-1007 = Left Front
30-14 = 697-1033 = Right Rear
36-19 = 683-979 = Right Front


If any of them fail go to THAT wheel sensor and test it at the wheel sensor harness. If it fails then replace that sensor. ($100)

If none of them fail remove the ABS Module and send it in for an overhaul (About $320) I sent mine to BBA Reman. It's a little more expensive but people have said it is better.

Recently I got my ABS Module back from BBA and all is well. They did a great job.

Last edited by AJR1982; 11-27-2013 at 12:53 AM.
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  #2  
Old 03-06-2014, 08:51 PM
`tito `tito is offline
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Location: Paraguay
 
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i have the trifecta christmast light on mine and just did this test,
here are my result
13-14 = 700-1027 = Left Rear <---- 1
28-12 = 704-1007 = Left Front <---- 1
30-14 = 697-1033 = Right Rear <---- 1
36-19 = 683-979 = Right Front <---- turns my multimeter off

please help :S
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  #3  
Old 03-06-2014, 10:18 PM
`tito `tito is offline
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just tested each sensor at each wheel only got signal from Rear Left, whats the odds that 3/4 of those sensors go bad lol
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  #4  
Old 03-07-2014, 12:48 AM
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AJR1982 AJR1982 is offline
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Mein Auto: 525i 2002 & x5 2002
1 in a billion. How is your test set up? Are you using DIY leads to test or the ones from your dmm?

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  #5  
Old 03-07-2014, 12:52 PM
`tito `tito is offline
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i used this and here are the symptoms and test i have done before

1) "trifecta light" came on after i done alighment service, first only the light were on, speedo and mpg and cruise control works until next day
2) have done the the turn left and turn right to reset it, the light went out and everything works for 2~3 blocks then everything came on again and speedo stop works
3) have done the OHM resistant test (13-14) (28-12) (30-14) <--- shows infinite (36-19) this last one when i plug my tester it simple turn off till i remove it from one of the pin
4) my simple actron autoscanner i bought from the us from my last trip for 115$ shows P0500 A
5) professional scanners can't even start reading from the OBDII port when selected ABS, it keep on reading and nothing happens till get error ( tried with 3 local mechanical of my city )
6) sending the ABS MODULATOR to the US for rebuild is sadly not an option for me, and no one in my country do this kind of job

so my question is, is my modulator dead or not? since i can get almost everything works for a moment only, ( now the turn left and turn right method only enable the speedo and mpg gauge, but the trifecta lights are permanently on always)

many thanks in advance
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  #6  
Old 03-07-2014, 09:18 PM
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AJR1982 AJR1982 is offline
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If any one of your sensors would have gone out the trifecta would have gone on. So it's likely that you are not testing it correctly. However it is impossible to tell you how to fix it without being there with you.
As far as 4) & 5) do not trust your OBDII SCANNER.

What country are you from?

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  #7  
Old 03-08-2014, 03:40 AM
`tito `tito is offline
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Quote:
Originally Posted by AJR1982 View Post
What country are you from?
Paraguay in the middle of South America, about the multimeter should i use diode or not ?
its a 2001 X5 3.0i

Last edited by `tito; 03-08-2014 at 03:43 AM.
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  #8  
Old 03-08-2014, 06:54 AM
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AJR1982 AJR1982 is offline
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I'm in Peru right now so welcome neighbor.

The Diode function never worked for me on my 2002 X5 3.0i.
How long have you owned the car?

I would test your wheel sensors again very carefully. I still think you weren't testing it correctly.

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  #9  
Old 03-08-2014, 08:29 PM
bdubb1977 bdubb1977 is offline
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Mine turned out to be the alternator. I had the trifecta with intermittent speedometer. Battery alternator wheel speed sensor dsc control box. Found out an old Army buddy worked at a BMW dealer. He had told me he thought the alternator was bad. The one i had replaced my failed alternator with was producing high voltage. I took mine (kept it cause i dont trust mail order alternators) to be rebuilt. Installed my original rebuilt alternator and everything went back to normal.

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  #10  
Old 03-09-2014, 06:44 AM
`tito `tito is offline
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Quote:
Originally Posted by AJR1982 View Post
I'm in Peru right now so welcome neighbor.

The Diode function never worked for me on my 2002 X5 3.0i.
How long have you owned the car?

I would test your wheel sensors again very carefully. I still think you weren't testing it correctly.

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about a year or so i own the x, whats the scale of the resistance should i use to test it ?
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  #11  
Old 03-09-2014, 02:11 PM
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AJR1982 AJR1982 is offline
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Mein Auto: 525i 2002 & x5 2002
I used a 2 mega ohm setting, 1mo is good as well. Look for anomalies. If one wheel is different that's your suspect. If none are different is your module

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  #12  
Old 03-11-2014, 05:48 PM
`tito `tito is offline
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no chance, my only hope is ordering another one from the us
thx for your help
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  #13  
Old 03-11-2014, 06:28 PM
`tito `tito is offline
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can you tell me that if this will fit mine?
http://www.ebay.com/itm/2000-2001-BM...9f1f49&vxp=mtr

im in doubts if it will fit because in the Notes Important part details says "To 08/2001" and i dont really know which month mine was manufactured.
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  #14  
Old 03-11-2014, 10:41 PM
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AJR1982 AJR1982 is offline
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Mein Auto: 525i 2002 & x5 2002
If you buy a new module you will have to have your computer recoded. Do you have a bmw dealer there?

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  #15  
Old 01-25-2017, 06:50 AM
DIY Mechanic DIY Mechanic is offline
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Mein Auto: 2005 x5 3.0 E53
Call the dealer Parts department give your vin # and they can tell you when it was made.

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