Impreza L Sedan F4-2.2L SOHC (1997)
D:I.S.C. (2200 cc MODEL)
The I.S.C. increases engine idle speed when the compressor is turned ON.
The Engine Control module activates the idle speed 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.
E: F.I.C.D. (1800 cc MODEL)
The F.I.C.D. increases engine idle speed when the compressor is turned ON.
The Engine Control module 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.