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While many sources repeat this “requirement”, I can assure you that it is really not necessary to activate the ABS/PSM/PASM systems during a bleed unless a substantial amount of air has gotten into the system, or components in the ABS/PSM/PASM have been changed out. We probably flush the hydraulics system on a couple hundred cars a year, and we normally do not activate the system unless there has been other work done to the system that requires it. I have watched local dealer techs doing cars and they don't do it either, and they have the PIWIS unit sitting right next to them.
In order to do the system activation during a bleed, you would need access to a PST II, a PIWIS unit, or the Durametric software.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
Last edited by JFP in PA; 02-17-2012 at 05:31 AM.
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