Refrigerant Pressure Sensor / Switch: Testing and Inspection
A/C Refrigerant Pressure Switch InspectionReference: A/C Refrigerant Pressure Switch Removal and Installation:Manual Type
A/C Control Pressure Switch
1. Run engine and A/C switch ON.
2. Check continuity between "a" and "b" terminals of A/C refrigerant pressure switch (1) in normal A/C operating condition.
If no continuity, replace A/C refrigerant pressure switch.
Radiator Cooling Fan and A/C Condenser Cooling Fan Control
Pressure Switch
1. Connect manifold gauge set to charging valves.
2. Run engine and A/C switch ON.
3. Check continuity between "c" and "d" terminals of A/C refrigerant pressure switch (1) when A/C refrigerant pressure is changed, as shown in figure.
If operation is not as specified, replace A/C refrigerant pressure switch.
A/C refrigerant pressure switch specifications
"A": Approx. 200 kPa (2.0 kg/sq.cm, 28.5 psi)
"B": Approx. 230 kPa (2.3 kg/sq.cm, 32.5 psi)
"C": Approx. 2600 kPa (26 kg/sq.cm, 370 psi)
"D": Approx. 3200 kPa (32 kg/sq.cm, 455 psi)
"E": Approx. 1100 kPa (11 kg/sq.cm, 156 psi)
"F": Approx. 1500 kPa (15 kg/sq.cm, 213 psi)