Impreza Coupe FWD F4-1820cc 1.8L SOHC (1995)
Control Assembly: Description and Operation
Switch Operation
Switch Operation
1. FUNCTION
1. When MODE selector switch is set to "MAX A/C", "A/C", "DEF/HEAT" or "DEF", air conditioning system relay activates to enter a signal
into engine control unit. This turns on both compressor clutch and F.I.C.D. (Fast Idle Control Device). At this point, the main and sub fans also
operate.
Blower relay operates to direct the air flow rate determined by FAN switch position.
2. Thermostat activates to stop compressor clutch, F.I.C.D., and main and sub fans.
3. When "High-Low" pressure switch operates, compressor clutch and F.I.C.D. stop but main and sub fans are operating.
4. When fan control switch operates, both main and sub fans operate.
2. OPERATION OF MAJOR COMPONENTS (MODE SWITCH "ON")