Do a google search. You should find a pin out diagram that shows what each individual pin is for. But that is worthless information for what you are looking for. There is absolutely nothing you can do with that information because you can't take any readings of any sort without using a proper break out box. A break out box is a fantastic tool if you are skilled in the use of digital meters and O scopes. But in this day and age of automotive diagnostics, you can probably find everything you need with a good scan tool. Not only can you pull codes, but you should be able to access the offending system and take your readings right from the scan tool.
There is a thread here about an IAC motor that was constantly running. It looks like it was the PCM, but if it had been a wiring short, then knowing the proper pin for the ground to the PCM was helpful in that it would allow him to just cut out the ground wire from the IAC to the PCM and replace it with a new wire.
