AC/Air Conditioning — Expansion Valve On–vehicle Inspection, page 98

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Expansion Valve On–vehicle Inspection — MK4 Supra Air Conditioning, page 98
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Page text (OCR transcript)
AC–98
AIR CONDITIONING SYSTEM  –  EXPANSION VALVE

EXPANSION VALVE
ON–VEHICLE INSPECTION

1.  CHECK QUANTITY OF GAS DURING REFRIGERATION CYCLE
2.  INSTALL MANIFOLD GAUGE SET
3.  RUN ENGINE
Run the engine at 1,500 rpm for at least 5 minutes. Then check that the high pressure reading is 1.371.57 MPa (14–16 kgf/cm2, 199–228 psi).
4.  CHECK EXPANSION VALVE
If the expansion valve is faulty, the low pressure reading will drop to 0 kPa (0 kgf/cm2, 0 psi).
HINT: When the low pressure drops to 0 kPa (0 kgf/cm2, 0 psi), feel the receiver's IN and OUT sides for zero temperature difference.

Expansion valve

EXPANSION VALVE REMOVAL

1.  REMOVE EVAPORATOR
(See page AC–82)
2.  REMOVE EXPANSION VALVE
Using a hexagon wrench, remove the 2 bolts and separate the evaporator and expansion valve.
Torque: 5.4 N·m (55 kgf·cm, 48 in.·lbf)
INSTALLATION HINT: Lubricate the new O–ring with compressor oil and install the tubes.

EXPANSION VALVE INSTALLATION

Installation is in the reverse order of removal.