Civic Wagon 2WD L4-1488cc 1.5L SOHC (EW1) 3V Carb (1986)
Expansion Valve: Testing and Inspection
Fig. 8 Expansion Valve Diagnosis Chart
Faulty expansion valves will be indicated by low suction and discharge pressures on the manifold gauge set. In most cases the power element fails and
the valve closes. Occasionally the inlet screen becomes clogged with contamination or desicant beads loose in the system.