I'd like to share my solution for aircon with VEMS.
Used MiscOut with conditions RPM > 700 and <5000, TPS < 80%, MAP < 80 kPa (N/A engine). That's gnd trigger for relay. 12V for relay used from A/C unit.
Relay 85 and 86 solved. 30 connected to chassis ground, 87 is "output"..
Since I had a/c pressure sensor before VEMS, i needed to change it, and used pressure switch from Fiat Punto (green, 5 pins) with small adapter made on lathe. Two pins are "input" pins. One is used for compressor, the other one for fan I and fan II.
Wired ground from relay 87 to pin that powers compressor if pressure is not too low or too high, and permanent ground to pin that turns fans. Output pins for fans I wired in parallel with two P259 channels used to drive fans.
Compressor can be powered only if satisfies all conditions above (MiscOut, A/C unit, pressure), and fans are turned on by p259 (clt) or pressure switch (it turns on first speed on 14 bar, and second at approx. 19 bar)
