Recently my corolla AE101 gives out a sound whenever the steering wheel is being steered. It gives out a sound as if the pump is working very hard and this happens normally in the morning but after a while when it has warmed up the sound "disappears" I've checked the fluid levels it seems ok and the belt tension is not loose. Is it a sign that the pump is going to fail? What happens if it fails, can the car still be driven?
Any suggestions?
Thanks!
Richard