MX-6 L4-1991cc 2.0L DOHC (1993)
Compressor Clutch: Description and Operation
Compressor/Magnetic Clutch FS Engine
System Operation
1. Signals from the blower switch and ACS are sent to the NC amplifier.
2. The evaporator temperature sensor resistance changes as the evaporator's temperature changes.
3. The NC amplifier monitors the evaporator thermistor's resistance changes.
4. The NC amplifier signals the PCME to turn on or off the magnetic clutch based on the evaporator's temperature. This protects the evaporator from
freezing.
5. The PCME controls the magnetic clutch by turning ON and OFF the NC relay.
6. To help liquefy refrigerant, the condenser fan rotates to increase airflow through the condenser when the NC compressor is on.
7. If the refrigerant pressure switch is broken or there is abnormal pressure in the refrigerant system, the pressure will remain open and not allow
current to flow to the magnetic clutch and condenser fan.
