Before taking measurements, turn on the air conditioning system for 10 minutes.
Thermoswitch valve IACV-FICD (SR20DE engines for Europe from 04.96)
With the air conditioner on and the switch contacts closed (contacts close at ambient temperature above 22-25°С) the IACV-FICD solenoid valve is open, through which additional air is supplied to the engine.
With open circuit breaker contacts (air temperature below 19-22°С) idle speed is controlled by the IACV-AAC valve only.