DSC, ABS, and brake light on highway

[Ricky Bobby]

Originally Posted by RickWI

Does anyone know a way to check the speed sensors, and where they connect on the ABS Unit? I have a 2002 X5 3.0 that I have been trying to repair for 2 months. I have seen 2-3 different pinouts for the sensors, and am getting confused. Does the Bosch 5.7 use different pins for different models? Did they change the module during the 2002 model year?

Rick, read this thread and follow the diagnostic procedures listed, including testing the sensors at the module which is shown in this thread. 2002 Should still be Bosch 5.7 if I'm not mistaken.

Bimmerfest - BMW Forums - View Single Post - 2002 E39 ASC BRAKE ABS lights on => Diagnostic Procedure & Parts Location

Let us know how you do!

[haueri]

Originally Posted by Ricky Bobby

Rick, read this thread and follow the diagnostic procedures listed, including testing the sensors at the module which is shown in this thread. 2002 Should still be Bosch 5.7 if I'm not mistaken.

Bimmerfest - BMW Forums - View Single Post - 2002 E39 ASC BRAKE ABS lights on => Diagnostic Procedure & Parts Location

Let us know how you do!

Hi, great thread. Before working through this I have a few questions:
After changing brake lines to the rear of my 2003 X5, I got the "trifeca lights" after 10 minutes driving. I initially believed it could be due to air in the system, and I have three times for the last two weeks been bleeding at every brake caliper, and also out from every line of the ABS module.
The ABS is working normal(tried at slippery gravel) after every start for around 10 minutes driving, then the lights come On. Any ideas why this happens? If there is a faulty wheel sensor, I would expect the lights to appear immediately? Thank's for any replies !

UPDATE : After changing a couple of wheel sensors, working my way around all wheels, still no improvement. Finally I tried to loosen the Brake Press sensor at the Abs module area, with my son pressing the brake. Bled out trapped air, and voila trifeca solved.