A/C Pressure Transducer - Operation

OPERATION

The internal resistance in the A/C pressure transducer changes in response to the pressures in the high side of the A/C refrigerant system. The Powertrain Control Module (PCM) provides a five volt reference signal and a sensor ground to the A/C pressure transducer, and uses the output voltage of the transducer to determine refrigerant high-side pressure. The PCM is programmed to respond to this and other sensor inputs by controlling the operation of the A/C clutch and the radiator cooling fan to help optimize A/C system performance and to protect refrigerant system components from damage.

The A/C pressure transducer is diagnosed using a scan tool A L L Diagnostic Trouble Codes ( DTC ).

The A/C pressure transducer cannot be adjusted or repaired and must be replaced if inoperative or damaged.