Previa Van LE 4WD L4-2438cc 2.4L DOHC SC MFI (1997)
Expansion Valve: Testing and Inspection
Front A/C Expansion Valve
FRONT EXPANSION VALVE
1. CHECK QUANTITY OF GAS DURING REFRIGERATION CYCLE
2. INSTALL MANIFOLD GAUGE SET
See: Service and Repair/Manifold Gauge Installation/Removal
3. RUN ENGINE
Run the engine at 1,500 rpm for at least 5 minutes. Then check that the high pressure reading is 1.37 - 1.57 MPa (14 - 16 kgf/Sq.cm, 199 - 228
psi).
4. CHECK EXPANSION VALVE
If the expansion valve is faulty, the low pressure reading will drop to 0 kPa (0 kgf/Sq.cm, 0 psi).
HINT: When the low pressure drops to 0 kPa (0 kgf/Sq.cm, 0 psi). feel the receiver's IN and OUT sides for zero temperature difference.
