Matrix XRS 2WD L4-1.8L (2ZZ-GE) (2003)
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a. Coat the flow control valve with power steering fluid and check that it falls smoothly into the flow control valve hole by its own weight.
b. Check the flow control valve for leakage. Close one of the holes and apply compressed air of 392 - 490 kPa (4 - 5 kgf/cm2, 57 - 71 psi) into
the opposite side hole, and confirm that air does not come out from the end holes.
If necessary, replace the vane pump assy.
23. INSPECT FLOW CONTROL VALVE COMPRESSION SPRING
a. Using vernier calipers, measure the free length of the spring.
Minimum free length: 36.9 mm (1.453 inch)
If it is not within the specification, replace the vane pump assy.
24. INSPECT PRESSURE PORT UNION
a. If the union seat in the pressure port union is remarkably damaged and it may cause fluid leakage, replace the vane pump assy.
