ECU for AHY/AXG Engine: Find the Right One

Hello.

"I'm planning to convert my ACV engine to AHY/AXG technology and am looking for a suitable engine control unit (ECU). Currently, I have one with an internal boost pressure sensor and without a CAN bus. I'm looking for one with an external boost pressure sensor and also without a CAN bus, specifically from an AHY/AXG engine. My question is: does this combination even exist? If so, what is the part number? According to my information, the following versions are available:"

Part number ------ Software version

074 906 018 AJ ---- SW: 3223 & 3908
074 906 018 AN --- SW: 2547
074 906 018 D ----- SW: 2531
074 906 018 N ----- SW: 2529

What is the part number for the ACV STG, specifically the plastic housing (MSA12) or the aluminum housing (MSA15.5)?
If MSA15 is likely 074 906 021 L, then a different dataset (021 M) is sufficient.
It's only connected to the housing with soldering, but it saves the cost of a new wiring harness.
The MSA12 can also be replaced with a 021M. In this case, you will need the appropriate control unit for the data set.

Best regards,
Micha

I have an MSA15. I would like to upgrade it to use an external pressure sensor.

TDI-GTI-4-Motion wrote:

I have an MSA15.

I would like to upgrade it to use an external pressure sensor. }
What do you hope to achieve with this?

It's technically easier to implement. I want to install a large, universal liquid-cooled head. Of course, this doesn't have any mounting points for sensors, etc., so I'll need to have some custom mounting points machined and welded on. The mounting for the combined pressure/temperature sensor is much simpler than the mounting for the individual temperature sensor. That's why I'd like to switch to the universal head.

I just checked what's currently installed.

Part number: 074 906 021 A.
Software version: 1909

And are you sure that incorporating the sensor saves enough effort to justify it?
Is it worth installing a new wiring harness?
Next suggestion: use the combination sensor, but only utilize the temperature sensor.
(I'd need to check the specifications, but either they're compatible or they can be adjusted in the software.)

Wiesel wrote:

And you are sure that incorporating the sensor saves so much effort that it... Is it worth it to install a new wiring harness?

I enjoy building wiring harnesses. However, I also think that regardless of whether I do a combination sensor conversion or not, something will probably need to be changed in the wiring harness. Therefore, it doesn't really matter.