Audi a4 1,8tq 1996 with 2,2 aan engine.

[Ruben israelsen]

Hello, Im New on this forum. I have a wish on getting help With Our Project. It is a a4 1,8tq 1996 that we put a 2,2 aan engine from 1994 s4 c4. I have the electrical from the c4 and wanted to put it together With the electrical from a4. I have cuttet of the old Connections from the 1,8 engine and hoping to find out wich wires that i should put togheter With the 1,8 Connections to get the engine running and With sensors working.

Some Pictures.

[UrS4boy]

AAN Engine Harness - ECU and Passenger compartment

Hello, Im New on this forum. I have a wish on getting help With Our Project. It is a a4 1,8tq 1996 that we put a 2,2 aan engine from 1994 s4 c4. I have the electrical from the c4 and wanted to put it together With the electrical from a4. I have cuttet of the old Connections from the 1,8 engine and hoping to find out wich wires that i should put together With the 1,8 Connections to get the engine running and With sensors working.

Some Pictures.

Your photo links don't work. Vacn won't allow links to attachments. (Apparently).

Regarding wiring, have you seen this:

AAN ECU pin-out with wire colours and hyperlinks:

http://forums.quattroworld.com/s4s6/msgs/21009.phtml

Passenger side engine harness:

http://12v.org/urs/AANEngineHarnessPassengerSideV2.pdf

[Ruben israelsen]

Hei, Been looking at this, and googlet alot more but i can't really understand everything. Can someone pleas help me a little more? I need to know what cables from the motronic should be put to the
contact pieces where the brain is put original on the a4. I need power 12v to the engine, power to fuelpump relay, speedometer, rpm, and every signal the brain need, so every sensor know what to do.

I know a guy did this on this forum, and it is a person in norway that did this, but he don't have the papers anymore, and i can't really understand that i have now..

[UrS4boy]

Hei, Been looking at this, and googlet alot more but i can't really understand everything. Can someone pleas help me a little more? I need to know what cables from the motronic should be put to the contact pieces where the brain is put original on the a4. I need power 12v to the engine, power to fuelpump relay, speedometer, rpm, and every signal the brain need, so every sensor know what to do. ..

Those two links that I provided you with previously have 99.9% of the info you need for the AAN side of this swap. You need somebody with A4 wiring diagrams to help you with the connections to the A4 harness. I think you need more help than this forum can provide over the internet. You need in-person help by someone who understands automotive wiring and can read Audi wiring diagrams.

Here is a link to the C4 UrS4/S6 wiring diagram: http://12v.org/urs/audi_c4_wiring_diagram.pdf (10 Mb so download, save and then open)

For sure you need the G4, G28 and G40 connected to the AAN ECU and the AAN ECU needs constant power to pin T55/18 and switched power to pin T55/27 and then coil power connections from the A4 harness.

One thing that I can tell from your photo is you have the harness going the wrong way. All than mess at the front of the car needs to be inside the car through a big rubber grommet, probably on the right side of the firewall (passenger side LHD).

This is all wrong (And you probably should have put the harness in properly *BEFORE* you installed the engine - would have been way easier than what you face now):