Refrigerant Pressure Sensor / Switch: Testing and Inspection

AIR CONDITIONING: AIR CONDITIONING PRESSURE SENSOR: ON-VEHICLE INSPECTION

1. INSPECT PRESSURE SENSOR

(a) Install the manifold gauge set Refrigerant.

(b) Connect the three 1.5 V dry cell battery's positive (+) lead to terminal 3 and the negative (-) lead to terminal 1. Then connect the voltmeter's positive (+) lead to terminal 2 and the negative (-) lead to terminal 1. Measure the voltage.





OK:

The voltage changes according to refrigerant pressure, as shown in the graph.

If the voltage is not as specified, replace the pressure sensor.