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Audi A8 D2 ABZ ECU Pinout

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 Post subject: Audi A8 D2 ABZ ECU Pinout
PostPosted: Thu Oct 24, 2013 1:15 am 
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Hi guys,

is it possible that I can't find ABZ or AHC ECU Pinout on the internet?!?!?

I only found this http://www.castor-troy.com/v8/ABZ%204.2V8%20Wiring.pdf

and it is totally unusable :(

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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Thu Oct 24, 2013 5:31 am 
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in what way is that abz diagram unusable? looks ok to me? unless your AHC motor is totally different wiring wise. If so, I'd suggest alldata, its where I've been getting diagrams when I need them:

http://www.alldatadiy.com

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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Thu Oct 24, 2013 5:40 am 
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Because I need to print all papers, than cut them and connect to make one page scheme. Scheme for one ECU on 7 pages, that's real BS.

Where you can see ECU power pinouts?!?!

Just look at any USA cars wiring diagram, that's made for kids to understood... :)

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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Thu Oct 24, 2013 10:54 am 
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shone190 wrote:
Because I need to print all papers, than cut them and connect to make one page scheme. Scheme for one ECU on 7 pages, that's real BS.

Where you can see ECU power pinouts?!?!


with my eyes?

trace 29, ecu pin b3 is switched 12v for instance. trace 88 ecu pin d9 is constant battery.

most audi VW diagrams are written like this one. If you do any sort of work on audi electronics you should learn to read them in this format, it wont be the least time you see it written like this.

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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Thu Oct 24, 2013 10:04 pm 
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Thanks :)

In the meantime I cut all seven papers and made one big "map". I'll take a picture and post it here for someone future projects.

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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Fri Oct 25, 2013 9:47 am 
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Why don't you just work out the function of the wires in the four connectors in the engine harness?

Far less wires so a lot less work.

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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Fri Oct 25, 2013 12:12 pm 
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What do you mean by "four connectors in the engine harness"? Connectors which goes in ECU?

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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Fri Oct 25, 2013 1:56 pm 
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The engine loom connects to the engine via the four connectors in the picture, mostly power and earths with some signals for the dashboard.


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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Fri Nov 08, 2013 11:30 am 
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I understand that, but where I can found pinout explanation for these connectors ?!?!

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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Fri Nov 08, 2013 3:05 pm 
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On the wiring diagram you already have :roll:

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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Wed Nov 19, 2014 2:57 am 
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Here are schematics that i used for someone who needs it.It's simplier than original Audi ones.
Just look on the schematics, i almost forgot how to wire it up so take this with reserve:

To start the ABZ engine on OEM ECU you need to hook up these wires and connections:

1.Big RED central connection of original cable loom (+12V MAIN)

2.Big BROWN central connection (Central ground)

3.BLACK/GREY cable (fused S115 20A) - IGNITION+Power to coilpacks +12V

4.GREEN/BLACK cable on connection A7 OBD2 connection+IMMO EMULATOR (connected together)
I used VAG IMMO EMULATOR from EBAY for 15 euro,works like charm:)

5.WHITE cable (fused S116 15A) - power +12V to injectors
(ECU is switching it's grounds to enable 'em)

6.BROWN/GEEN pin A4 - ECU control of a fuel pump (i used external one switched on battery)

Some myths busted:

1.ABZ can start without TCM or automatic transmission.
2.To start an ABZ you may need IMMO Emulator (European versions)
3.If ECU is not giving spark or injectors are dead, check crankshaft and camshaft hall sensor.
Without signal from these ECU will not fire anything.
4.For OBD2 connection, use pin A7+Ground,connect power & ignition 12V to ECU and you shall read
the stock ECU.


Attachments:
99-A8-Engine-1.pdf [56.13 KiB]
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99-A8-Engine-2.pdf [48.49 KiB]
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99-A8-Engine-3.pdf [45.9 KiB]
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 Post subject: Re: Audi A8 D2 ABZ ECU Pinout
PostPosted: Wed Nov 19, 2014 3:49 pm 
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you have responded to an old thread, but yes the proper diagrams are available in elsawin as well.. let me know if needed

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