Pressure Transducer
WARNING: This page is about a different car, the 2002 Dodge Grand Caravan, 2002 Dodge Caravan, 2002 Chrysler Voyager, and 2002 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
The A/C pressure transducer is tested using a DRBIII® Scan Tool. See SELF-DIAGNOSTIC SYSTEM . 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 indicates 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 compressor. See A/C PRESSURE TRANSDUCER VOLTAGE table for the possible condition indicated by the transducer voltage.
A/C PRESSURE TRANSDUCER VOLTAGE
| Voltage | Possible Indication |
|---|---|
| 0.0 | No Sensor Supply Voltage From PCM, Shorted Sensor Circuit or Faulty Transducer. |
| 0.150 To 0.450 | Ambient Temperature Below 50° F (10° C) Or Low Refrigerant Temperature. |
| 0.451 To 4.519 | Normal Refrigerant System Pressure. |
| 4.520 To 4.580 | High Refrigerant System Pressure. |
| 5.0 | Open Sensor Circuit Or Faulty Transducer. |