Based on what I saw at that link, it looks like you're expected to tap the wire that goes from that sensor to the ECU rather than query it from the ECU via OBDII. You get the same data that the ECU gets, rather than have the ECU tell you. You're using the existing sensor, you're just using its raw signal rather than the data the ECU provides.
So, for the IAT, you'd find the wire coming out of the intake snorkel and tap it to run to that module.
This sig may return, some day.