ES 350 V6-3.5L (2GR-FE) (2007)
3. INSPECT FLOW CONTROL VALVE ASSEMBLY
(a)
Coat the flow control valve assembly with power steering fluid and check that it falls smoothly into the flow control valve due to its own
weight.
If the control valve does not fall into the hole smoothly, replace the vane pump assembly.
(b) Check the flow control valve assembly for leakage. Close one of the holes and apply compressed air, 392 to 490 kPa (4 to 5 kgf/cm2, 57 to
71 psi), into the opposite side hole, and confirm that air does not come out from the end holes.
If air leaks, replace the vane pump assembly.
4. INSPECT FLOW CONTROL VALVE COMPRESSION SPRING
(a)
Using vernier calipers, measure the free length of the flow control valve compression spring.
Minimum free length: 29.2 mm (1.150 in.)
If the length is less than the minimum, replace the vane pump assembly.
5. INSPECT PRESSURE PORT UNION
If the union seat in the pressure port union is damaged, it may cause fluid leakage. In this case, replace the vane pump assembly.