1.8T Wiring Help (POS Pinouts)

**waad_uk** · 6 September 2007, 12:00

This the Motronic Manual I Have......

Attached Files

Manual1.JPG (30.5 KB, 111 views)

**waad_uk** · 6 September 2007, 12:01

And this is the pinout table it gives for the POS connectors.....

Attached Files

Manual2.JPG (27.0 KB, 112 views)

**UrS4boy** · 6 September 2007, 14:49

First of all, good on you for doing the 1.8t conversion on your own. Its pretty easy if you have any wiring skills at all. Try to be as neat as possible so the wiring loom is fairly compact. (You might want to bundle wires using zap-straps).

But on the question at hand:

First of all, I cannot guarantee that an ABY is different that an AAN. However, Corey has been selling 034 1.8t conversion kits and harnesses that were built for AANs to ABY owners for some time now. Since nobody has complained about misfiring from the get-go, I assume that, deep down the ABY wiring is the same as the AAN (even if wire colours are different). Also you should note that the Bentley (my guide at the time) has errors in it, of the type you mention (cylinders swapped on paper that are not that way in reality). That confused the h*LL out of me for awhile when I was developing the conversion.

What you need to do is check the wiring from the POSs to the cylinders. On my AAN the leads to the coils from the POS were labeled (1,2,...5). If not you can trace the wires back from the coils to the three pin end of the POSs (two pin on one POS). Then you need to realise (I had the benefit of an X-ray view of a POS to help me with this) that Pin 2 (the ground on the 4 pin side of the POS) is connected to an internal "bus bar" that provides the ground to all three POS channels. The next thing to realise is the transistors/chips inside are flow through, i.e. the one on the left outputs on the left, straight through, the one on the right out puts on the right. See for yourself by going to this webpage:

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http://www.urq20v.com/S6/POS/S6POS.htm

(NOTE: where the poster says "This x-ray of the POS doesn't really show us anything" I was like, "NO! It shows EVERYTHING", then the photo below that where the opened up the POS to show the wires outputting from the transistors/chips to the three pin side of the POS confirmed the rest.)

Once you are confident of the input and output wiring to the OE POS, then you can ignore my guide if its confusing because you can now follow the input wires through your POSs to the cylinder in question. The only thing left is to wire the Volvo four pin connectors accordingly.

Hope this helps. If not, ask away and I will attempt to answer your question(s).

Dave (UrS4boy) F.

**waad_uk** · 6 September 2007, 20:41

Great, I was hoping the POS units were simply in one side out the other... That makes things a bit easier to follow through and double check.

I am sure the diagram you have in your guide is correct and its simply the motronic manual at fault.

Cheers

Ed

**UrS4boy** · 7 September 2007, 04:44

Originally posted by waad_uk

Great, I was hoping the POS units were simply in one side out the other... That makes things a bit easier to follow through and double check.

I am sure the diagram you have in your guide is correct and its simply the motronic manual at fault.

Cheers

Ed

I hope (and presume) that I am correct. Nevertheless, check the "Flow through" wiring as per the X-ray of the POS to confirm that I am correct. Good luck. It will all go smoothly.

**waad_uk** · 7 September 2007, 21:14

Looks like the audi manual is incorrect. Checked the current wiring, and Daves conversion does match up with my car.

Taking the OEM coil cover off again today was the final straw for the oem wiring which has now developed serveral shorts. Pulled the sleeving off and all the insulation has cracked in several places.... looks like I am replacing the coils at just the right time!

**UrS4boy** · 8 September 2007, 05:05

Originally posted by waad_uk

Looks like the audi manual is incorrect. Checked the current wiring, and Daves conversion does match up with my car.

Taking the OEM coil cover off again today was the final straw for the oem wiring which has now developed serveral shorts. Pulled the sleeving off and all the insulation has cracked in several places.... looks like I am replacing the coils at just the right time!

Well that's good to know on both counts. Remember that the 1.8t conversion is NOT an upgrade. Its a cost effective replacement that is good up to about 370 hp with minimal tracking (heat is still the killer of the 115 "X" coil packs (although the 115R's seem to be a bit more heat resistant). The upgrade is the 034 high output coils. If I could figure out what the original application of those coils was, I would build another conversion around them.

**merlin's S4** · 8 September 2007, 09:09

Originally posted by UrS4boy

Well that's good to know on both counts. Remember that the 1.8t conversion is NOT an upgrade. Its a cost effective replacement that is good up to about 370 hp with minimal tracking (heat is still the killer of the 115 "X" coil packs (although the 115R's seem to be a bit more heat resistant). The upgrade is the 034 high output coils. If I could figure out what the original application of those coils was, I would build another conversion around them.

Do it Dave, Find those coils!!!

**Jas11n** · 8 September 2007, 09:15

I know what they are (make), and what motor they were fitted too

Not sure if I should say though as I'm an OEM coilpack supporter

**UrS4boy** · 8 September 2007, 15:30

Originally posted by Jas11n

I know what they are (make), and what motor they were fitted too

Not sure if I should say though as I'm an OEM coilpack supporter

I am also a OE coil pack supporter - As long as they are working. If you read (or have read) my 1.8t coil pack conversion instructions, the back story was I wanted to develop an alternative to the OE coil packs (and POSs) in case, at some point, the OE system was no longer being made. The 1.8t coil packs are not an upgrade, just an alternative.

Having said that, the 034 high output coil system, using single coils with built-in POSs is an upgrade in the sense of higher firing voltage and getting the coils away from the heat. On that basis, I want to find out if my wiring diagram will work with those coils. I need to find out more information about the coils and, therefore, I would like to find out their original application. If you do know this, could you please post here OR send me a pm. (Thanks).

**Jas11n** · 8 September 2007, 18:54

PM sent Dave

**max_s2** · 12 May 2008, 13:21

So, has anyone tried to fit 1.8T coils on ABY? I'm planing to do this in next two weeks.. wanna be sure that everything what's writen in the guide will also aply to ABY!

Another question. Could this be true that numbers of coils are changed from 06B905115L to 06B905115R?

**UrS4boy** · 12 May 2008, 13:50

Originally posted by lv_max

So, has anyone tried to fit 1.8T coils on ABY? I'm planing to do this in next two weeks.. wanna be sure that everything what's writen in the guide will also aply to ABY!

Another question. Could this be true that numbers of coils are changed from 06B905115L to 06B905115R?

As I noted in an earlier post, I believe quite a few ABY people here have done the 1.8t coil pack conversion as a DIY. Still others have used the 034 or Apikol harnesses built for AANs on their ABYs (basically the same engine except for intake manifold differences). If you don't want to do an DIY, buy the Apikol kit that comes with 5 prepped 115R coils. If you want to do the DIY, follow this link to the up-dated DIY instructions (some new part no.s for connectors):

http://forums.audiworld.com/s4s6/msgs/195907.phtml

And yes, the 115Rs supercede the 115Ls.

Good luck.

Dave F.

**Val** · 12 May 2008, 18:31

maybe i'm wrong, but here is 1.8T->aan swap
http://www.s-cars.org/postnuke/downl...structions.pdf

1.8T Wiring Help (POS Pinouts)

1.8T Wiring Help (POS Pinouts)

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