Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Manual — part 569
POWER ASSISTED SYSTEM
2A–5
Steering Column
WARNING: TO AVOID DEPLOYMENT WHEN
TROUBLE-SHOOTING THE SRS SYSTEM, DO NOT
USE ELECTRICAL TEST EQUIPMENT, SUCH AS
BATTERY-POWERED OR A/C-POWERED
VOLT-METER, OHMMETER, ETC., OR ANY TYPE OF
ELECTRICAL EQUIPMENT OTHER THAN
SPECIFIED IN THIS MANUAL. DO NOT USE A
NON-POWERED PROBE-TYPE TESTER.
INSTRUCTION IN THIS MANUAL MUST BE FOL-
LOWED CAREFULLY, OTHERWISE PERSONAL IN-
JURY MAY RESULT.
When servicing a vehicle equipped with Supplemental
Restraint System, pay close attention to all WARNINGS
and CAUTIONS.
For detailed explanation about SRS, refer to Restraints
section.
The steering column has three important features in
addition to the steering function:
1. The column is energy absorbing, designed to
compress in a front-end collision to minimize the
possibility of injury to the driver of the vehicle.
2. The ignition switch and lock are mounted
conveniently on the column.
3. With the column mounted lock, the ignition and
steering operation can be locked to prevent theft of
the vehicle.
The column can be disassembled and reassembled.
However, to ensure the energy absorbing action, use only
the specified screws, bolts and nuts as designated, and
tighten them to the specified torque.
Handle the column with care when it is removed from the
vehicle. A sharp blow on the end of steering shaft or shift
lever, or dropping the assembly could shear or loosen the
fasteners that maintain column rigidity.
Diagnosis
Since the problems in steering, suspension, wheels and
tires involve several systems, they must all be considered
when diagnosing a complaint. To identify the symptom,
always road test the vehicle first. Proceed with the follow-
ing preliminary inspections and correct any defects which
are found.
1. Inspect tires for proper pressure and uneven wear.
2. Raise vehicle on a hoist, then inspect front and rear
suspension and steering linkage for loose or
damaged parts.
3. Spin the front wheels. Inspect for out-of-round tires,
out-of-balance tires, loose and/or rough wheel
bearings.
General Diagnosis
Condition
Possible cause
Correction
Vehicle Pulls
Mismatched or uneven tires.
Replace tire.
Tires not adequately inflated.
Adjust tire pressure.
Broken or sagging springs.
Replace spring.
Radial tire lateral force.
Replace tire.
Improper wheel alignment.
Adjust wheel alignment.
Brake dragging in one wheel.
Repair brake.
Loose, bent or broken front or rear
suspension parts.
Tighten or replace the appropriate
suspension part(s).
Faulty shock absorbers.
Replace shock absorber.
Abnormal or Excessive Tire Wear
Sagging or broken spring.
Replace spring.
Tire out of balance.
Balance or replace tire.
Improper wheel alignment.
Check front end alignment.
Faulty shock absorber.
Replace shock absorber.
Hard driving.
Replace tire.
Overloaded vehicle.
Replace tire and reduce load.
Tires not rotated periodically.
Replace or rotate tire.
Worn or loose road wheel bearings.
Replace wheel bearing.
Wobbly wheel or tires.
Replace wheel or tire.
Tires not adequately inflated.
Adjust the pressure.
Wheel Hop
Blister or bump on tire.
Replace tire.
Improper shock absorber operation.
Replace shock absorber.
2A–6
POWER ASSISTED SYSTEM
Condition
Correction
Possible cause
Shimmy, Shake or Vibration
Tire or wheel out of balance.
Balance wheels or replace tire/or
wheel.
Loose wheel bearings.
Replace wheel bearing.
Worn steering linkage ball joints.
Replace ball joints.
Worn upper or lower ball joints.
Replace ball joints
Excessive wheel runout.
Repair or replace wheel and/or tire.
Blister or bump on tire.
Replace tire.
Excessive loaded radial runout of
tire/wheel assembly.
Replace tire or wheel.
Improper wheel alignment.
Check wheel alignment.
Loose or worn steering linkage.
Tighten or replace steering linkage.
Loose steering gear.
Tighten housing bolts.
Tires not adequately inflated.
Adjust tire pressure.
Loose, bent or broken front or rear
suspension parts.
Tighten or replace the appropriate
suspension parts.
Faulty shock absorber.
Replace shock absorber.
Hub bearing preload misadjustment.
Adjust preload.
Hard Steering
Bind in steering linkage ball studs,
upper or lower ball joint.
Replace ball joint.
Improper wheel alignment.
Check wheel alignment.
Steering gear misadjustment.
Check and adjust pinion torque.
Tire not adequately inflated.
Inflate tires to proper pressure.
Bind in steering column or shaft.
Repair or replace.
Improper power steering system
operation.
Repair or replace.
Refer to “Power steering system
diagnosis”
Too Much Play In Steering
Wheel bearings worn.
Replace wheel bearings.
Loose steering gear or linkage.
Retighten or repair.
Steering gear misadjustment.
Inspect and adjust steering gear
preload.
Worn or loose steering shaft
universal joint.
Retighten or replace steering shaft.
Worn steering linkage ball joints.
Replace ball joints.
Worn upper or lower ball joints.
Replace ball joints.
Poor Steering Wheel Returnability
Bind in steering linkage ball joints.
Replace ball joints.
Bind in upper or lower ball joints.
Replace ball joints.
Bind in steering column and shaft.
Repair or replace.
Bind in steering gear.
Check and repair steering gear.
Improper wheel alignment.
Adjust wheel alignment.
Tires not adequately inflated.
Adjust tire pressure.
Loose steering wheel nut.
Retighten.
Worn wheel bearing.
Replace.
POWER ASSISTED SYSTEM
2A–7
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 gear.
Retighten mounting bolt.
Faulty steering gear.
Check and adjust steering gear.
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).
Steering gear misadjustment.
Check or adjust steering gear.
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.
2A–8
POWER ASSISTED SYSTEM
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
between this noise and steering performance. Do not
replace the valve unless the “hissing” noise is extremely
objectionable. 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 gear mounting.
Tighten steering gear mounting.
Steering gear misadjustment.
Check and adjust steering gear
preload.
Poor Return of Steering Wheel to
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.
Steering gear misadjustment.
Adjust the steering gear.
Sticky or plugged steering gear
valve.
Repair or replace steering gear
valve.
Entry of air in the power steering
system.
Bleed the system.
Momentary Increase In Effort When
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
Insufficient pump pressure.
Repair pump assembly.
When Turning Especially During
Parking
Sticky steering gear valve.
Repair or replace steering gear.
Parking
Power steering fluid level low.
Replenish fluid.
Excessive Wheel Kick Back or Loose
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 of Power
Assist
Sticky steering gear valve.
Repair or replace steering gear
valve.
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.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст