Refrigerant Pressure Sensor / Switch: Testing and Inspection

A/C PRESSURE TRANSDUCER

A/C Pressure Transducer Voltage:

The A/C pressure transducer is tested using a DRBIII(R) scan tool. Refer to Body Diagnostic Procedures. Before testing the A/C pressure transducer, be certain that the transducer wire harness connections are clean of corrosion and properly connected. For the air conditioning system to operate, an A/C pressure transducer voltage reading between 0.7 and 4.56 volts is required. Voltage outside this range indicate a low or high refrigerant system pressure condition to the ATC control module. The control module is programmed to respond to a low or high refrigerant system pressure by suppressing operation of the compressor. Refer to the A/C Pressure Transducer Voltage chart for the possible condition indicated by the transducer voltage readings.