GenBoard/Manual/VanosOutput (2023-02-28 10:09:24)

See

Normally variable timing (VVTI or Vanos) solenoids are powered by constant +12V on one pin and controlled by low-side outputs as sane engineering practice applied generally. (For example BMW M50 Vanos is sane).

In VEMS ECUs there are plenty N-FET type low-side driver outputs anyway, eg. free injector output or IGBT ignoutput, the ECU switches GND as usual), so the extra NFET-outputs are optional (useful if 8 cylinders consume many outputs, or other special relays or actuators are planned to be connected).


Some Vanos solenoids require Hi-side PFET outputs

If the Vanos solenoid is driven by high-side output

So please check the Vanos solenoids and measure diode polarity (and determine power direction)

BMW usually requires 2 outputs per Vanos solenoid. See [camshaft angle control in VemsTune help]