4 Runner Limited 2WD V6-3.4L (5VZ-FE) (1997)
Refrigerant Pressure Sensor / Switch: Testing and Inspection
1. CONNECT MANIFOLD GAUGE SET
See: Service and Repair/Manifold Gauge Installation/Removal
2. DISCONNECT CONNECTOR
3. 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
4. INSPECT PRESSURE SWITCH OPERATION
a. Connect the positive (+) lead from the ohmmeter to terminal 1 and negative (-) lead to terminal 2.
b. Check continuity between terminals when refrigerant pressure is changed.
If operation is not as specified, replace the pressure switch.