What to do with Immo and power - 3B to multi coil

[Jonas_R]

Well on my way to convert my 3B to multi coil setup using an AAN ECU.

To simple questions:

1. If the AAN ECU has an immobilizer, how can that be removed or disabled? Can it be done via VAGCOM or do I need a new chip?

2. I need to power the 5 coils, right now I only have one power wire going to the old single coil.
I was thinking of simple using this wire to power all 5 coils? or should I install 4 extra wires with power from the battery?

Think I have the rest covered

[UrS4boy]

Well on my way to convert my 3B to multi coil setup using an AAN ECU. 2. I need to power the 5 coils, right now I only have one power wire going to the old single coil. I was thinking of simple using this wire to power all 5 coils? or should I install 4 extra wires with power from the battery?
Think I have the rest covered

You don't say whether or not you are using an AAN engine bay harness or not. The AAN (and presumably ABY) harnesses have two 3 pin coil power connectors that end up on the firewall connector rack (the white connectors in the photo in this post about Power Output Stages):

Link to POS info with photo showing coil power connectors

Note that one coil power connector has 2 wires coming out and the other 3 wires. The white connectors both have 3. This power comes from switch power circuit (No. 30 for an AAN). So you would need to get your power from a switched (ignition on) source, NOT all the way from the battery. Note: the AAN has a circuit breaker between the No. 30 power source and the coils (and the ECU via pin 27).

AAN pin-out info with wire colours

[Jonas_R]

I'm not using a AAN harness, and I'm not using the POS units since I'm running the 034motorsport high output coil setup.

However this does really not answer my question So I will try to write it again.
Can I use the +12V signal to my single coil and use this for all 5 coils used in the multi coil setup? Or do I for some odd readson need 5 individual +12v signals for the coils?

[UrS4boy]

However this does really not answer my question So I will try to write it again.
Can I use the +12V signal to my single coil and use this for all 5 coils used in the multi coil setup? Or do I for some odd readson need 5 individual +12v signals for the coils?

If you read my answer again, I did give you what you needed: The power to the AAN coils comes from a single switched power source which also powers the ECU via pin T27/55.

Therefore (the big mental leap), in theory, you should be able to use your single point 3B switched coil power source to feed the 034 coils. Create some kind of 1 into 5 splitter harness and you *should* be fine.

Okay?

[Jonas_R]

Why dont just write that in the first post then?

"In theory, you should be able to use your single point 3B switched coil power source to feed the 034 coils. Create some kind of 1 into 5 splitter harness and you *should* be fine."

I actually asked about this, instead I get a couple of links and a very non definitive answer. This made me more confused actually

[UrS4boy]

I gave you the extra links so you would understand how the AAN system works and why a single power point should be fine. You should have a look at an AAN wiring diagram, e.g. Bentley Audi 100/S4/A6/S6 manual page X51, to confirm what I suggested.

I strongly suggest that you include a circuit breaker or a fuse between the switched power and the 034 HO coils. In fact, one way to do the split would be run power to a power bar and then have it spilt to five fuses, each leading to one coil. That would ensure that a coil problem doesn't take your ignition system totally out. This has been done by a few people running OE AAN coils because of previous problems.

[Jonas_R]

Thanks - great idea with the fuses