Section 2 (Power Steering System): Pump: Operation
WARNING: This page is about a different car, the 2002 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Power steering pumps have different pressure rates and are not interchangeable with other pumps.
The power steering pump is a constant flow rate and displacement, vane-type pump. The pump internal parts operate submerged in fluid. The flow control orifice is part of the high pressure line fitting. The pressure relief valve inside the flow control valve limits the pump pressure.