I struggled servicing tpms in my shop for the past few years, I was at SEMA a few weeks back and found this company called TPMS Manager. Its a tpms information database...has troubleshooting, year/make/model lookup, relearns, replacement sensors, service kits, and a bunch of other cool stuff. I signed up for the free trial and I have to say its the best place to look for all the TPMS information you need. They have different versions available too; Powered by TIA with all their training content included, and another Powered by Bartec (TPMS HUB) for any tire shops that use bartec scan tools. Software is rally going to help make tpms a profit center for me.
www.tpmsmanager.com