Originally Posted by
shogun
ABS, ASC, AND ASC+T MALFUNCTION
MODELS AFFECTED: All models equipped with ABS,ASC OR ASC+T
FAULT: Any of the ABS ASC and ASC+T systems inoperative, intermittently inoperative, or illuminating the warning lamp.
CAUSE: All BMW'S with slip control systems use 4 wheel speed sensors which monitor each wheels speed of rotation with a high accuracy. The system control unit uses this information to calculate a vehicle speed. In this way it detects wheel speed variation. If the inputs vary from each other by a certain amount, the control unit is not able to do the calculation reliably (plausibility fault) and takes its self off-line as a safety precaution(fail-safe).This can be because the wheels and tires are non-approved partsand therefore do not agree with the system.
^This. Working on the same type of problem on a 95 540. This vehicle made it to limp mode and wont recover on it's own. Pull each wheel and be sure to clean the speed sensors of all metallic dust. That alone will cause the ABS error which will trip the other errors.
95 E34 530I V2.37
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