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Old 09-04-2014, 12:28 PM
bamax5013.0 bamax5013.0 is offline
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Mein Auto:
Brake an ABS

I have a 2001 x5 3.0 an the brake an ABS lights are on an help on how to fix?? Brake light is yellow not red.

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Old 09-04-2014, 12:49 PM
thrillcat thrillcat is offline
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Location: Ames, IA
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Mein Auto: 2005 BMW X5 4.8is
Just had this over the weekend. The first thing two things to do are to A) test your cruise control, and B) test the voltage from all 4 Wheel Speed Sensors.

It's probably a bad Wheel Speed Sensor, and if it happens to be the wheel that communicates with your cruise control, that won't work either. Search here and for "bifecta".
2008 X5 3.0si Alpine White
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Old 09-04-2014, 12:52 PM
bamax5013.0 bamax5013.0 is offline
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Ok I will check that an see what I find thanks.

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Old 09-08-2014, 10:42 PM
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AJR1982 AJR1982 is offline
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Mein Auto: 525i 2002 & x5 2002
I've got the answer for what I believe will cover all AWD BMW models. I've spent two days troubleshooting to get this information so please read it before asking me any questions. If you like the information below and would like to donate $5 for my time please click here

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.

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.

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 $300) I sent mine to BBA Reman. It's a little more expensive but people have said it is better.
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