Transmission boxes - TR-60SN

[X543]

Whilst I'm chasing down a few faults, I have come across an issue which can't be answered by me and/or few others...

Transmission box in all 955 (Q7/Touareg and maybe 957) are an Aisin TR-60SN. There also appears to be 3 different types albeit all are under the same code of TR-60SN, one type is known as 2-port, other 3-port and last one doesn't appear to have a name as far as I can see so lets call it X-port. The Valve Body of these looks as below (understood and extracted from an older post here - https://rennlist.com/forums/cayenne-...erences.html):

 

''X-port''

 

3-port

 

2-port

As you can see above, the ''X-port'' version has 2 two gold colour ***** which are the pressure sensors however the other two do not. another photo of what I'm assuming is another X-port below and diagram from Aisin indicating where the pressure sensors/switches are:

 

''X-port''

 

 

Diagram from Aisin

My problem begins here... I am trying to fix a code 17225/P0841 Oil Pressure Switch 1 Transmission open circuit/short circuit to B+. I have carried out the following:

- Inspection of all wires running in the footwell both sides
- Making good any corroded connections
- Inspection of connectors on the body of the transmission box
- Changing the fluid and filter of the transmission box
- Ensuring enough ATF is in the box

All above were suggestions by other users on here and different places. However the problem remains. I have now ordered the pressure sensor to change this HOWEVER having looked at the photos of the valve body I took when I did the ATF flush and filter change, it appears I have a X-port transmission which does not have the gold pressure sensors/switches, basing it on earlier photos above I have a 2-port TR-60SN but the location of the pressure sensors/switches are unknown. To add to this, if looking at the diagram from Aisin it reads ''some models only'' underneath the pressure sensors/switches.

What I'm trying to figure out is:

A) Are there any actual pressure sensors/switches in a 2-port TR-60SN box? I'd expect so as I always thought an auto-box needs to know pressure to switch gears etc. (although I can be wrong)
B) Where are these pressure sensors/switches?

Any help/ideas will be appreciated.

P.S. - the car is a Oct 2005 build, however the code on the transmission box itself reads 230806 which can mean the transmission box has been changed at some point in the last 20 years. Photos from my valve body and transmission box's plaque below: