Impreza Coupe FWD F4-1820cc 1.8L SOHC (1995)
4. F.I.C.D.
The F.I.C.D. increases engine idle speed when the compressor is turned ON.
The Engine Control unit activates the by-pass air control solenoid valve in advance to control the amount of by-pass air flowing through the
throttle body in relation to the signal emitted from the A/C switch so that the proper idle speed specified for each engine load is achieved.
5. FAN CONTROL
The main fan and sub fan are switched between two stages, Hi and Low, according to the operating modes shown in the table.
