Isuzu 1999 RODEO Workshop Manual page 107

Power Steering System
There is some noise in all power steering systems. One
of the most common is a hissing sound when the steering
wheel is fully turned and the car is not moving. This noise
will be most evident when the steering wheel is operated
while the brakes are applied. There is no relationship be-
Condition
Rattle or Chucking Noise
Poor Return of Steering Wheel to
Center Center
Momentary Increase In Effort When
Turning Wheel Fast To Right or Left
Turning Wheel Fast To Right or Left
Steering Wheel Surges or Jerks
When Turning Especially During When Turning Especially During
Parking Parking
Excessive Wheel Kick Back or Loose
Steering Steering
Hard Steering or Lack or Power
Assist Assist
Unstable Engine Idling or Stalling
When Turning
POWER–ASSISTED STEERING SYSTEM
tween this noise and steering performance. Do not re-
place the valve unless the "hissing" noise is extremely ob-
jectionable. A replacement valve will also have a slight
noise, and is not always a cure for the condition.
Possible cause
Pressure hose touching other parts
of vehicle.
Tie rod ends loose.
Loose steering unit mounting.
Improper front wheel alignment.
Wheel bearing worn.
Tie rod end binding.
Ball joint binding.
Tight or frozen steering
bearing.
Sticky or plugged steering unit valve.
Entry of air in the power steering
system.
High internal leakage.
Power steering fluid level low.
Insufficient pump pressure.
Sticky steering unit valve.
Power steering fluid level low.
Air in system.
Tie rod end loose.
Wheel bearing worn.
Sticky steering unit valve.
Insufficient pump pressure.
Excessive internal pump leakage.
Excessive internal steering gear
leakage.
Power steering fluid level low.
Pressure switch of the
steering pump or its harness is faulty.
Correction
Adjust hose position. Do not bend
tubing by hand.
Tighten or replace tie rod end.
Tighten steering unit mounting.
Adjust front wheel alignment.
Replace front wheel bearing.
Replace tie rod end.
Replace ball joint.
shaft Replace steering assembly.
Flush or replace steering unit.
Bleed the system.
Repair steering gear.
Replenish fluid.
Repair pump assembly.
Flush or replace steering unit.
Replenish fluid.
Bleed hydraulic system.
Tighten tie rod end.
Replace wheel bearing.
Flush or replace steering unit.
Repair pump assembly.
Repair pump assembly.
Repair steering gear.
Replenish fluid.
power Repair or replace.
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