A/C pressure transducer consists of piezoelectric element and it detects A/C refrigerant pressure. Piezoelectric type is more advantageous to obtain linear data of pressure than existing switch type. Thus, optimum control of A/C compressor and fan is realized and improved fuel efficiency follows with it.

P0533 is set when the voltage above 4.87V - maximum voltage of A/C pressure transducer signal - is detected for more than 0.6 sec.. This code is due to open or short in signal or ground circuit of A/C pressure transducer.

Fig.1) Waveform of A/C pressure transducer in accordance with A/C operation. (A/C compressor operation)

☞ Output signal(voltage) changes in accordance with the amount of refrigerant and the change of weather occurs.

Check if normal pressure change in accordance with A/C compressor operation at normal pressure range shown in "Specification".