This is information that I can get from the Toyota technical guys. I don't believe this info is available in any factory service manuals. This info is available buy using the Vetronix MasterTech diagnostic scan tool to either the diagnostic port on the OBD cars or the OBD-II port under dash and inspecting the data from user selected data list.
Even though this tool is for inspection of the ECM, you really need to know what you are doing with this tool.
Joe.