A/C pressure sensor is installed betweem receiver driver and expansion valve. Sensing refrigerants pressure, this sensor converts pressure into voltage to input the value to PCM. With this signal, PCM performs idle control, cooling fan control, aircon compresser control.
Checking output signals from A/C pressure sensor under detecting condition, if an signal below 0.25V lasts for more than 10 sec., PCM sets P0532.
Item | Detecting Condition | Possible cause |
DTC Strategy | ● Detects sensor signal short to low voltage | ● Poor connection ● Open in power circuit ● Open or short to ground in signal circuit ● Faulty A/C pressure sensor ● Faulty PCM |
Enable Conditions | ● Engine works | |
Threshold value | ● Sensor output voltage< 0.25V | |
Diagnosis Time | ● Continuous (More than 10 seconds failure for every 20 seconds test ) | |
MIL On Condition | ● DTC only (NO MIL ON) |
Pressure(psi) | 13.7 | 127.4 | 241.2 | 355.0 | 468.8 |
Voltage(V) | 0.5 | 1.5 | 2.5 | 3.5 | 4.5 |
