Tundra Regular Cab SR5 4WD V8-4.7L (2UZ-FE) (2000)
Expansion Valve: Testing and Inspection
Expansion Valve
INSPECT EXPANSION VALVE
a. Check quantity of gas during refrigeration cycle.
b. Set on manifold gauge set.
c. Run engine.
1. Run the engine at 1,500 rpm for at least 5 minutes.
2. Then check that the high pressure reading is 1.37 - 1.57 Mpa (14 - 16 kg/sq.cm, 199 - 288 psi).
d. Check expansion valve.
If the expansion valve is faulty, the low pressure reading will drop to 0 kPa (0 kg/sq.cm, 0 psi).
HINT: When the lower pressure drop to 0 kPa (0 kg/sq.cm, 0 psi), feel the receiver's IN and OUT sides for no temperature difference.