Isuzu Rodeo UE. Manual - part 27

2A–4 POWER–ASSISTED STEERING SYSTEM

Condition

Correction

Possible cause

Abnormal Noise

Worn, sticky or loose upper or lower
ball joint, steering linkage ball joints
or drive axle joints.

Replace.

Faulty shock absorbers.

Replace.

Worn upper or lower control arm
bushing.

Replace.

Loose stabilizer bar.

Retighten bolts or replace bushings.

Loose wheel nuts.

Tighten nuts. Check for elongated

wheel nut holes.

Replace wheel if required.

Loose suspension bolts or nuts.

Retighten suspension bolts or nuts.

Broken or otherwise damaged wheel
bearings.

Replace wheel bearing.

Broken suspension springs. 

Replace spring.

Loose steering unit. 

Retighten mounting bolt.

Faulty steering unit.

Replace steering unit.

Wandering or Poor Steering Stability

Mismatched or unevenly worn tires.

Replace tire or inflate tires to proper
pressure.

Loose steering linkage ball joints.

Replace ball joints.

Faulty shock absorbers.

Replace shock absorber.

Loose stabilizer bar.

Tighten or replace stabilizer bar or
bushings.

Broken or sagging springs.

Replace spring (pairs).

Improper wheel alignment.

Adjust wheel alignment.

Erratic Steering When Braking

Worn wheel bearings.

Replace wheel bearings.

Broken or sagging springs.

Replace spring (pairs).

Leaking caliper.

Repair or replace caliper.

Warped discs.

Replace brake disc.

Badly worn brake pads.

Replace brake pads.

Tires are inflated unequally.

Inflate tires to proper pressure.

POWER–ASSISTED STEERING SYSTEM

2A–5

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-

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.

Condition

Possible cause

Correction

Rattle or Chucking Noise

Pressure hose touching other parts
of vehicle.

Adjust hose position. Do not bend
tubing by hand.

Tie rod ends loose.

Tighten or replace tie rod end.

Loose steering unit mounting.

Tighten steering unit mounting.

Poor Return of Steering Wheel to
Center

Improper front wheel alignment.

Adjust front wheel alignment.

Center

Wheel bearing worn.

Replace front wheel bearing.

Tie rod end binding.

Replace tie rod end.

Ball joint binding.

Replace ball joint.

Tight or frozen steering shaft
bearing.

Replace steering assembly.

Sticky or plugged steering unit valve.

Flush or replace steering unit.

Entry of air in the power steering
system.

Bleed the system.

Momentary Increase In Effort When
Turning Wheel Fast To Right or Left

High internal leakage.

Repair steering gear.

Turning Wheel Fast To Right or Left

Power steering fluid level low.

Replenish fluid.

Steering Wheel Surges or Jerks
When Turning Especially During

Insufficient pump pressure.

Repair pump assembly.

When  Turning  Especially  During
Parking

Sticky steering unit valve.

Flush or replace steering unit.

Parking

Power steering fluid level low.

Replenish fluid.

Excessive Wheel Kick Back or Loose
Steering

Air in system.

Bleed hydraulic system.

Steering

Tie rod end loose.

Tighten tie rod end.

Wheel bearing worn.

Replace wheel bearing.

Hard Steering or Lack or Power
Assist

Sticky steering unit valve.

Flush or replace steering unit.

Assist

Insufficient pump pressure.

Repair pump assembly.

Excessive internal pump leakage.

Repair pump assembly.

Excessive internal steering gear
leakage.

Repair steering gear.

Power steering fluid level low.

Replenish fluid.

Unstable Engine Idling or Stalling
When Turning

Pressure switch of the power
steering pump or its harness is faulty.

Repair or replace.

2A–6 POWER–ASSISTED STEERING SYSTEM

Power Steering Pump

Foaming milky power steering fluid, low fluid level, and
possible low pressure can be caused by air in the fluid, or
loss of fluid due to internal pump leakage. Check for leak
and correct.  Bleed the system. Extremely cold tempera-
tures will cause air bubbles in the system if the fluid level

is low.  If the fluid level is correct and the pump still foams,
remove the pump from the vehicle and check housing for
cracks.  If the housing is cracked, replace the pump hous-
ing.

Condition

Possible cause

Correction

Low Pressure Due to Steering Pump

Relief valve sticking or inoperative.

Replace relief valve.

Side plate not flat against cam ring.

Replace side plate.

Extreme wear of cam ring.

Replace cam ring.

Scored side plate or rotor.

Replace side plate or rotor.

Vanes sticking in rotor slots.

Repair or replace vanes and rotor.

Cracked or broken side plate.

Replace side plate.

High internal leakage.

Repair internal leakage.

Low Pressure Due to Steering Gear

Scored housing bore.

Replace housing.

Growling Noise In Steering Pump

Excessive back pressure in hoses or
steering unit caused by restriction.

Repair steering unit or pump.

Scored side plate or rotor.

Replace side plate or rotor.

Worn cam ring.

Replace cam ring.

Groaning Noise In Steering Pump

Air in the fluid.

Bleed hydraulic system.

Low fluid level.

Replenish fluid.

Pump mounting loose.

Tighten mounting bolt.

Rattling Noise In Steering Pump

Vanes sticking in rotor slots.

Repair or replace vanes and rotor.

Vane improperly installed.

Repair rotor and vane.

Swishing Noise In Steering Pump

Damaged relief valve.

Replace relief valve.

Whining Noise In Steering Pump

Scored side plate and vanes.

Replace side plate and vanes.

Steering Column Lock System

Condition

Possible cause

Correction

Will Not Unlock

Damaged lock cylinder.

Replace lock cylinder.

Damaged park lock cable.

Replace park lock cable.

Will Not Lock

Lock spring broken or worn.

Replace lock cylinder.

Damaged lock cylinder.

Replace lock cylinder.

Ignition switch stuck.

Repair or replace ignition switch.

Park lock cable damaged.

Replace park lock cable.

Key Cannot be Removed in
“OFF LOCK”

Ignition switch is not set correctly.

Correct ignition switch.

“OFF-LOCK”

Damaged lock cylinder.

Replace lock cylinder.

Faulty shift lock mechanism.

Repair or replace the shift lock
mechanism.

Column

Condition

Possible cause

Correction

Noise in Column

Universal joint loose.

Tighten joint.

Shaft lock snap ring not seated.

Place snap ring in proper position.

POWER–ASSISTED STEERING SYSTEM

2A–7

Turn Signal Switch

This diagnosis covers mechanical problems only. Refer
to Turn Signal Switch in Electrical section for electrical
diagnosis.

Condition

Possible cause

Correction

Turn Signal Will Not Stay In Turn
Position

Foreign material or loose parts
preventing movement of yoke.

Repair or replace signal switch.

Broken or missing detent or
canceling spring.

Replace signal switch.

Turn Signal Will Not Cancel

Loose switch mounting screws.

Tighten mounting screws.

Switch or anchor bosses broken.

Replace turn signal switch.

Broken, missing or out of position
detent, return or canceling spring.

Replace turn signal switch.

Worn canceling cam.

Replace turn signal switch.

Turn Signal Difficult To Operate

Turn signal switch arm loose.

Tighten arm screw.

Broken or distorted yoke.

Replace turn signal switch.

Loose or misplaced springs.

Replace turn signal switch.

Foreign parts and/or material.

Repair turn signal switch.

Loose turn signal switch mounting
screws.

Tighten mounting screws.

Turn Signal Will Not Indicate Lane
Change

Broken lane change pressure pad or
spring hanger.

Replace turn signal switch.

Broken, missing or misplaced lane
change spring.

Replace turn signal switch.

Base of wire damaged.

Replace turn signal switch.

Hazard Switch Cannot Be Turned Off

Foreign material between hazard
switch to turn signal switch body.

Repair or replace hazard switch.

No Turn Signal Lights

Electrical failure in chassis harness.

Refer to Electrical section.

Inoperative turn signal flasher unit.

Replace flasher unit.

Loose chassis harness connector.

Repair loose connector.

Front or Rear Turn Signal Lights Not
Flashing

Burned-out or damaged turn signal
bulb.

Replace bulb.

High resistance connection to
ground at bulb socket.

Repair bulb socket.

Loose chassis harness connector.

Repair loose connector.