Ng2951,
I posted a question on the Tacoma forum and will let you know what comes back regarding your Scangauge. By the way, in case you want to follow that fourm it is ToyotaNation at this address:
http://www.toyotanation.com/forum/forumdisplay.php?f=61
Their is a tremendous amount of info for the 2005+ Tacoma, BUT just a warning though, these are (mostly) pretty young guys and, how should I put this, can get overzealous in their responses....
Mike