Hello, a short update. I fitted the EDC16U1 with the number 03G906016FF but just reflashed it with a flash from a DSG car so that in the VCDS i could code it to DSG.

The car is working and in the moment i have a couple of things to sort out. First, my AC is not working, as in not starting at all, when i switch on the climatronic the fans are not spinning and the clutch is not engaged as there is no cold air. In the ECU connectors there are no wires in the place where the Klimaanforderung is (E_S_AC technical description) and in my EDC15 there is a wire.

Second i have also a wire for Motorluftrelais (A_T_MLR) but on EDC16 there is Kuhlerventilator (A_T_LUES1). When i connect those wires the fans start spinning with ACC on, and after the key is removed they keep spinning for about 5 s.

Third problem is, the ECU is reporting a fault for brake switch, although the DSG and the ABS can see the brake switch and it is operating normal in abs and DSG measuring blocks.

And the last issue that i have is the ASV. On EDC16 it is electronically operated but mine is vacuum operated. I found the wires on the connector and tried to use just the wires for the motor but as soon as i start the car the ASV shuts and the engine dies. I guess hier i will have to feed the ECU a signal so that it thinks the ASV is open. I should have somewhere on the ECU a 5V free pin which i could short with the input pin for the ASV but is this correct, is the voltage 5V for an open ASV on golf mk5.

Is there someone who has done something similar or is willing to help.

Hello, a bit of a late reply. I managed to get all working. Yes the issue was the climatronic not seeing RPM. The solution was cramping the pins inside the ecu connector, they were a bit loose, that also solved the brake switch issue. There were a couple of pins that were too loose.

Now everything works but one minor issue. When starting the car if I turn the key to ACC and then wait a bit, the car is cranking for 2 s before starting but if i turn the key from off position all the way into cranking in one turn the car starts immediately.