Even though didn't get a code from ASD test, I continued troubleshooting with factory process for testing module connectors ... found something weird very quickly ... the front wheel speed sensors are supposed to read zero V at the module interface block (read with meter between the specific points) when not turning, and 4V when you spin the wheel by hand. I got zero on left front and then 4V when spun, but on right front, I got 8.15V both stopped and spinning.

Again, I have no codes from the ASD module - is this something it would not recognize? Is the 4V signal developed by the ABS for the ASD system or do both ABS and ASD simply get the signals in parallel with one another? If in parallel would the ABS see this difference as a fault?

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George Stephenson
1991 350 SDL (200K and she ain't bent, yet)
former 2002 E320 4Matic Wagon - good car
former 1985 300 CD - great car
former 1981 300 TD - good car
former 1972 280 SEL - not so good car
a couple of those diesel Rabbits ...40-45 mpg