RAM 2500 Truck 2WD V8-5.7L VIN D (2004)
Refrigerant Pressure Sensor / Switch: Testing and Inspection
The A/C pressure transducer is tested using a DRBIII(R) scan tool. Refer to the appropriate diagnostic 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 air conditioning system 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) or Engine Control Module (ECM) depending on engine application. The
PCM/ECM 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 conditions indicated by the transducer voltage reading.
