Refrigerant Pressure Sensor / Switch: Testing and Inspection

ON-VEHICLE INSPECTION

1. SET ON MANIFOLD GAUGE SET

2. REMOVE GLOVE COMPARTMENT PARTS

3. DISCONNECT CONNECTOR FROM COOLING UNIT

4. SET VEHICLE IN THESE CONDITIONS:
a. Running engine at 2,000 rpm
b. Blower speed control switch at HI
c. Temperature control lever MAX. COOL
d. A/C switch ON

5. INSPECT PRESSURE SWITCH OPERATION




a. Disconnect the pressure switch connector.
b. Using an ohmmeter, check that there is continuity between the terminals.




c. When refrigerant pressure is changed, as shown in the illustration.

If operation is not as specified, replace the pressure switch.