Refrigerant Pressure Sensor / Switch: Description and Operation

Fig 11 Pressure Transducer - Viewed From Beneath Vehicle:

Fig 12 Pressure Transducer:

The A/C Pressure Transducer functions as the refrigerant system pressure sensor. It supports the condenser/radiator fans and compressor functions. The pressure transducer is attached to a valve on the discharge line near the compressor.

Circuit C18 connects from the Powertrain Control Module (PCM), cavity 42, to the transducer. The PCM uses information from the transducer to control operation of the radiator fans.

Ground for the transducer is supplied on circuit K4. This circuit connects to cavity 43 of the PCM connector. The K4 circuit is spliced in with many of the sensors used in the fuel injection and ignition systems.