Circuit Operation

Air Conditioning Refrigerant Pressure Sensor

The A/C refrigerant pressure sensor attached to the air conditioning evaporator liquid line, senses refrigerant pressure on the air conditioning system high-side. The refrigerant pressure status is sent to the PCM. The purpose of this sensor is to inform the PCM of high-side pressure status so the PCM can:

^ Control cooling fan operation.
^ Prevent compressor operation if ambient temperatures are too cold.
^ Disable the compressor before high-side pressure becomes too high.
^ Diagnosis of compressor controls.