Hello, after changing the ECU from 018N (APY) to 018H (BAM) and adding VVT and Lambda, I'm experiencing a lack of communication with the AWD system. When attempting to connect with the ignition on, there are no issues. However, when I start the car, the communication immediately cuts off. I've also noticed that the Haldex isn't functioning during driving, and when it's wet, the car slips as if it's operating only as front-wheel drive (FWD)
Is there a possibility to make this work, or do I need to revert back to 018N?

Thanks!!

No relationship between ECU - Haldex.
At least not something signifiant.