Previa Van RWD L4-148.8 2438cc 2.4L DOHC SC (2TZ-FZE) (1996)
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Expansion Valve: Testing and Inspection
Front A/C Expansion Valve
FRONT A/C EXPANSION VALVE ON-VEHICLE INSPECTION
1. INSPECT REFRIGERANT VOLUMES
2. INSTALL MANIFOLD GAUGE SET
3. FRONT A/C SWITCH ON AND BLOWER SWITCH TO HI
4. RUN ENGINE AT APPROX. 2,000 RPM
Run the engine at 2,000 rpm for at least 5 minutes.
5. INSPECT EXPANSION VALVE
If the expansion valve is clogged, the low pressure reading will drop to 0 kg-cm2 (0 psi, 0 kPa), otherwise it is OK.
HINT: If the low pressure reading is normal and only the front A/C is not cooling, check for malfunction of the expansion valve.