Checking Power Steering Fluid Level

Position the vehicle on a level surface.
Start the engine. With the vehicle kept stationary, turn the steering wheel several times continuously to raise the fluid temperature to 50-60°C (122-140°F).
With the engine at idle, turn the steering wheel fully clockwise and counter-clockwise several times.
Make sure that there is no foaming or cloudiness in the reservoir fluid.
Stop the engine and check for any difference in fluid level between a stationary and a running engine.
NOTE:
1. If the fluid level varies 5 mm (0.2 in) or more, bleed the system again.
2. If the fluid level suddenly rises after stopping the engine, further bleeding is required.
3. Incomplete bleeding will produce a chattering sound in the pump and noise in the flow control valve, and lead to decreased durability of the pump.
Fig 1: Identifying Fluid Level
Courtesy of KIA MOTORS AMERICA, INC.