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.