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Home >> Lexus >> 2000 >> LS 400 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic A/C-Heater Systems >> Component Tests >> Expansion Valve

Expansion Valve

Install A/C system manifold gauge set. Start engine and operate a 1500 RPM for at least 5 minutes. If high-side pressure is 199-228 psi (14-16 kg/cm2 ) and low-side pressure is 21-36 psi (1.5-2.5 kg/cm2 ), expansion valve is operating normally. If expansion valve is faulty, low-side pressure will decrease to zero psi (zero kg/cm2 ). Ensure temperature sensing tube is correctly installed. Replace expansion valve as necessary.

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