Arthur Dalton, you are quite correct about the everything you have said. Thanks for clearing up for me what the actual module is looking for.

-tp

Here is a good article that is easy to understand and will help anyone who want to know these things.. it also verifies why a scope waveform is the actual way to go if you want an exact diagnosis....
The " Well, My Uncles Volvo had dat problem once and we just changed the 02 sensor" does not work anymore.....

http://www.picotech.com/auto/articles/diagnosing-abs.html

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A Dalton