Transducer, A/C Pressure: Operation

WARNING: This page is about a different variant/trim than selected.

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 Electric Vehicle Control Unit (EVCU) 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 EVCU 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. Refer to DIAGNOSIS AND TESTING .

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