Sienna AWD V6-3.3L (3MZ-FE) (2004)
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21. INSPECT VANE PUMP ROTOR AND VANE PUMP PLATES
a. Using a micrometer, measure the thickness of the vane pump plates.
Minimum thickness: 1.397 to 1.403 mm ( 0.0550 to 0.05524 inch)
b. Using a feeler gauge, measure the clearance between the vane pump rotor groove and the vane pump plate.
Maximum clearance: 0.03 mm (0.0012 inch)
If it is more than the maximum, replace the vane pump assy.
22. INSPECT FLOW CONTROL VALVE
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. If
necessary, replace the vane pump assy.
b. Check the flow control valve for leakage. Close one of the holes and apply compressed air of 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 necessary, replace the vane pump assy.
