If there is a way to do it without a scan tool, this would be worthwhile posting somewhere here for everyone. Many times there are ways to do things w/o a scan tool, but the engineer in charge of the part has not verified it and will not add it to the procedure. (Example, checking DTCs on a C5 Vette via the message center.
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As for the H3G, don't get excited, it is the designator for the Global H3 or better known as the export model from Shreveport and S.Africa.