Evaporator Core: Testing and Inspection

REAR A/C EVAPORATOR

ON-VEHICLE INSPECTION

1. CHECK QUANTITY OF GAS DURING REFRIGERATION CYCLE
2. SET MANIFOLD GAUGE SET
3. RUN ENGINE
a. Rear blower speed set at "HI" position b. A/C switch ON
c. Rear temperature control set at 18.5°C (65°F)
d. Run the engine at 1,500 rpm for at least 5 minutes.
Then check that the high pressure reading is 1.9 to 2.1 MPa (19 to 21 kgf/sq.cm, 270 to 300 psi).

4. CHECK EXPANSION VALVE
If the expansion valve is faulty, the low pressure reading will drop to 0 kPa (0 kgf/sq.cm, 0 psi).