obd2 wiring info

[NC325iC]

I have some info and some questions about obd2 wiring changes. Previously I have made a thread like this about c101 wiring for mixed year engine swaps.

X20
Pin Color Function
1
2
3 gr/vi exhaust flap activate
4 bk/bl AC Compressor control relay +12?
5 bk/gr AC Pressure switch
6 vi/gn AC on signal(climate control)
7 gn EWS signal
8 rd/wi exhaust gas flap valve+carbon cannister valve(+12) +12@run
9 br/rd speed signal right rear (ACS/ABS)
10
11 br/yl coolant temp cluster
12 br/vi coolant temp cluster
13 gn/vi fuel pump relay +12@start/run
14
15 bk/gn starter(signal to other things)
16 wt/yl data link pin 15
17 wt/vi data link pin 20
18 bk/yl start +12@start
19 wt/gn data link pin 7
20 bk crankshaft rpm speed
21 gn unloader relay +12@start/on
22 gn/wt data link pin 16, reverse switch +12?
23 br/gn oil pres signal
24 wt/bl fuel consumption
25 bl alternator,data link pin 12 12

X6031
Pin Color Function
1 gr Check Engine
2 gn/bl carbon canister valve activate
3 gn/rd fuel consumption
4 wt/vi/yl pin 7 obd2 data link pin 2
5 yl/rd fuel tank pres
6 rd/gn +5v to TPS/fueltankpres
7 br/bk gnd (rpm/fuel tank pres)
8 bk/vi/yl data link pin 4 fuse 46
9
10
11
12

Ok so first question that comes up for me. Fuel economy gauge. x6031-3 goes to x6000-46 and is labeled TI blah blah fuel consumption. x20-24 goes to x6000-9 and is labeled TI blah blah fuel consumption. Is there any way in hell that BMW put in redundant fuel consumption signals? There is some speculation that x6031-3 is the vehicle speed wire, can anyone confirm this?

Next question, x20-9 (x6000-15)is an ABS level speed signal. Does this wire require signal to keep codes from popping up? Is it another wire on the x6000?

any other tips?

[Northern]

Kadunza posted this a while back on facebook:


I'm running my VSS per that diagram, not through the X6031. I'm not up and running yet, but hoping for a first start today.

[NC325iC]

Next question. X20-21 unloader relay, looks like it needs 12v at run and start. Should I give it c104-2 which is main relay power in e30.

[NC325iC]

Bump

[NC325iC]

Bump, I know someone in here has worked this stuff up.

[Northern]

X20-21 per the diagram and the pinout I used should be +12v for ignition switch.
In my 1990 325is, that's C101-7

[NC325iC]

C101-7 provides 12v for the ignition coil

[NC325iC]

https://onedrive.live.com/redir?resid=B10A98BDC1B966D2!76402&authkey=!AEqVCXlQeU7fYRA&ithint=file%2cpdf

Here is my wiring breakdown so far for an early model e30 with c101 and c104.

Where are people hooking up their AC wiring, x20-6?
anybody hooked up a charcoal canister?

From the looks of it I'm going to have an abundance of +12v wires.