What do the 28 pin connectors house?

[Bonburner]

So I found a link to a post for the electrical diagram.

I don't know what these acronyms stands for and I had some difficulties finding out what they are online.



Thanks guys!

Edit:
Did more digging .. the diagram seems to be numbered
14 --- 1
28 --- 15

2 Pin = REV = Reverse
4 Pin = MACC = Microphone ACC (ignition)
5 Pin = MIN+ = Microphone +
6 Pin = SNS2 = Ground (Not sure what SNS2 stands for)
11 Pin = AGND = Aux Ground (for Aux Pins 26, 27, 28)
17 Pin = SPD = Speed Sense
18 Pin = SGND = Shield Ground (for the Mic Pins 4, 5, 19)
19 Pin = MIN- = Microphone -
25 Pin = ADPG = AUX I (Are there 2 Aux connectors?)
26 Pin = VAR+ = Aux (R) +
27 Pin = VA- = Aux (L & R) -
28 Pin = VAL+ = Aux (L) +



I have a serious suspicion that TX1+, TX-, SW1, SW2, and SWG (switch ground) are steering wheel controls .. which the FR-S does not have. But no confirmation.

[ChrisW]

Speed sensor signal, reverse switch signal, bluetooth microphone, aux in, camera video and camera power, probably some other things but those are the major ones

[Bonburner]

I was hoping if someone knew what each acronym meant .. I'd like to utilize all the relevant pins when possible ~