A/C pressure transducer consists of piezoelectric element and it detects A/C refrigerant pressure. Piezoeletric 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 4.7V - 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.
Item | Detecting Condition | Possible Cause | ||
DTC Strategy | ● Voltage monitoring | ● A/C pressure transducer circuit ● A/C pressure transducer component | ||
Enable Conditions | ● IG KEY "ON" | |||
Threshold Value | ● When output signal is above the maximum value ( above 4.7V ) | |||
Diagnostic Time | ● 0.6 sec. | |||
Fail Safe | Fuel Cut | NO | ● A/C pressure fixed at 100 hPa | |
EGR Off | NO | |||
Fuel Limit | NO | |||
MIL | OFF | |||
Output signal(voltage) changes in accordance with the amount of refrigerant and the change of weather. Check if normal pressure change occurs in accordance with aircon compressor operation at normal pressure range shown in "Specification".
