Liberty 2WD V6-3.7L (2008)
Refrigerant Pressure Sensor / Switch: Testing and Inspection
A/C PRESSURE TRANSDUCER
The A/C pressure transducer is tested using a scan tool (refer to 9 - Engine Electrical Diagnostics for more information). Before testing the A/C pressure
transducer, be certain that the transducer wire harness connection is clean of corrosion and properly connected. For the A/C to operate, an A/C pressure
transducer voltage reading between 0.451 and 4.519 volts is required. Voltages outside this range indicate a low or high refrigerant system pressure
condition to the powertrain control module (PCM). The PCM is programmed to respond to a low or high refrigerant system pressure by suppressing
operation of the A/C compressor. Refer to the A/C Pressure Transducer Voltage chart for the possible conditions indicated by the transducer voltage
reading.
