More info:

Hi,

the airbox flap is controlled by

KFLUKL [load/RPM] at hex 1A906 "Kennfeld zur Steuerung der Luftfilterklappe"

TLUKL [sec] at hex 1A946 "Verzögerungszeit für Schließen der Luftfilterklappe"

and

VLUKL [km/h] at hex 1A947 "vfzg - Schwelle für Öffnen der Luftfilterklappe"

It is not documented in the ME7.1 Funtionsrahmen, because it is a special function only in the RS4.



I have also blocked my open airbox flap, because I want to use the implemented "intake air changeover function" to control a water methanol injection.

To do this, I will disconnect the harness connector from the N335 and plug it into a relay to switch a electrical high-pressure water pump.

The N335 is connected to pin 44 of the 551K ECU.

So I can control the pump by KFLUKL over load and RPM with a vehicle speed threshold.

I will do this in the next month, because I don't have time at the moment.

Awesome idea with the meth injection control... I thought about it myself, but it would require extra code, because if I am not mistaken that map is only "on/off".

I managed to get a used Aquamist HFS-3 kit for a lot below retail, so I am using that. Fitting it now actually - a lot of work
This controller tracks the injector duty cycle, so it delivers a truly progressive output.

I will look and see what I can use the output for though
Btw, do you know if this feature is somehow specific to 551K ecu? I don't mean the software, I mean the hardware in ECU? Or is it just a spare output on other ECU's?
I will also need to look for codewords to disable diagnosis, because I don't have it plugged in.

Thanks  

I don`t know if it is a specific port or pinout only on the 551K ECU,
but I think the 551K ECU and all very close ME7.1 ECU versions like the 551M (equal CPU ROM), have all the same hardware, but I'm not absolutely sure.