The 3 steering yaw sensors seem pretty well protected from both hazards but they may need recalibration The 4 wheel sensors and wires are exposed to the elements and to shocks/vibration The E39 ABS module was mounted too close to engine heat causing solder cracks & fried electronics The warning lights will reset whenever you turn the car off (but go back on if the fault persists) Another fix is to slowly turn the steering wheel from completely left to completely right, then back again. Driving a few miles on a regular surface should fix the problem. If you recently drove on ice, a dynamometer, or on another very slippery surface, the car may just think the system has malfunctioned.
Hence, this BMW E39 ABS 3-warning light DIY will concentrate on understanding and diagnosis of the problem All the work is in correct diagnosis of the problem parts replacement is trivial (from 1 to six bolts in a few minutes) Carsoft may erroneously show a rear speed sensor failure but just replacing the speed sensor may make no difference. Sometimes the fault only appears when the engine is hot other times only at speeds over 40 mph The fault is often intermittent leading you to falsely believe you've resolved the problem (proper diagnosis is important) The 3 warning lights reset when the ignition is turned off, only to repeatedly reappear within minutes of normal driving In my 2002 BMW E39 DSC, three orange (warning) cluster display lights lit, ABS, Brake, & DSC Most of the time, the problem is the ABS module or one of the 4 wheel speed sensors (& sometimes the brake pressure sensor)
įuture: Maybe someone can put a copy of this in the DIY section after it's properly reviewed for mistakes.
BMW INPA SINGLE TEST/VALVE PUMP UPDATE
Here is my attempt at combining information for our ABS DIY repair writeup in a single post:Ĭredit: Extensive leverage from other sources as new information comes in, I will update this post as long as it will let me. DIY ABS BRAKE DSC lights on (ABS Module & Wheel Sensor Test & Replace) Thread: 2002 E39 ASC BRAKE ABS lights on => Diagnostic Procedure & Parts Location The original post is by Bluebee on bimmerfest forums View attachment ASC BRAKE ABS lights on =) Diagnostic Procedure & Parts Location.zip
Look at that it appears I can just embed it learned something new. It is HTML and I can't upload that to the forum so I zipped it.Īssuming this will work but if it does not I can convert it to PDF. I don't have the original link but I saved the page. Easier than that you could pull the plug off the ABS module and test the sensor as per
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