Corolla Sedan 4-Door L4-1587cc 1.6L DOHC MFI (1997)
Refrigerant Pressure Sensor / Switch: Testing and Inspection
ON-VEHICLE INSPECTION
1. Install Manifold Gauge Set
See: Service and Repair/Manifold Gauge Installation/Removal
2. Disconnect Connector From Pressure Switch.
3. Run Engine At Approx. 2,000 RPM.
4. Inspect Pressure Switch Operation.
Magnetic Clutch Control:
a. Connect the positive (+) lead from the ohmmeter to terminal 2 and negative (-) lead to terminal 1.
b. Check continuity between terminals when refrigerant pressure is changed. as shown in the illustration. If operation is not as specified, replace
the pressure switch.
Cooling Fan Control:
a. Connect the positive (+) lead from the ohmmeter to terminal 4 and negative (-) lead to terminal 3.
b. Check continuity between terminals when refrigerant pressure is changed. as shown in the illustration. If operation is not as specified, replace
the pressure switch.
5. Stop Engine And Remove Manifold Gauge Set.
6. Connect Connector To Pressure Switch.
