Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual — part 1713

POWER-ASSISTED STEERING SYSTEM

2A–1

RODEO SPORT

STEERING

POWER-ASSISTED STEERING SYSTEM

CONTENTS

Service Precaution. . . . . . . . . . . . . . . . . . . . .

2A–2

Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–2

General Description . . . . . . . . . . . . . . . . . .

2A–8

Power Steering System Test . . . . . . . . . . .

2A–10

Maintenance . . . . . . . . . . . . . . . . . . . . . . . .

2A–11

Fluid Level . . . . . . . . . . . . . . . . . . . . . . . . .

2A–11

Bleeding The Power Steering System . . . .

2A–11

Bleeding Procedure . . . . . . . . . . . . . . . . . .

2A–11

Flushing The Power Steering System . . . .

2A–11

Steering Wheel Free Play Inspection . . . . .

2A–12

Front End Alignment Inspection and
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . .

2A–12

Main Data and Specifications . . . . . . . . . . .

2A–16

Special Tools . . . . . . . . . . . . . . . . . . . . . . .

2A–17

Power Steering Unit. . . . . . . . . . . . . . . . . . . .

2A–18

Power Steering Unit and Associated Parts .

2A–18

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–18

Installation (4

´2 Model) . . . . . . . . . . . . . . .

2A–19

Installation (4

´4 Model) . . . . . . . . . . . . . . .

2A–19

Power Steering Unit Disassembled View . .

2A–20

Disassembly . . . . . . . . . . . . . . . . . . . . . . . .

2A–20

Inspection and Repair. . . . . . . . . . . . . . . . .

2A–21

Reassembly . . . . . . . . . . . . . . . . . . . . . . . .

2A–21

Main Data and Specifications . . . . . . . . . . .

2A–21

Special Tools . . . . . . . . . . . . . . . . . . . . . . .

2A–22

Power Steering Pump . . . . . . . . . . . . . . . . . .

2A–23

Power Steering Pump and Associated Parts

2A–23

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–23

Installation . . . . . . . . . . . . . . . . . . . . . . . . .

2A–23

Power Steering Pump Disassembled View

2A–24

Disassembly . . . . . . . . . . . . . . . . . . . . . . . .

2A–24

Inspection and Repair. . . . . . . . . . . . . . . . .

2A–25

Reassembly . . . . . . . . . . . . . . . . . . . . . . . .

2A–25

Main Data and Specifications . . . . . . . . . . .

2A–27

Transfer Gear Assembly . . . . . . . . . . . . . . . .

2A–28

Transfer Gear Assembly and Associated
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–28

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–28

Inspection and Repair. . . . . . . . . . . . . . . . .

2A–28

Installation. . . . . . . . . . . . . . . . . . . . . . . . . .

2A–28

Supplemental Restraint System Steering

Wheel & Column . . . . . . . . . . . . . . . . . . . . .

2A–29

Service Precaution . . . . . . . . . . . . . . . . . . .

2A–29

SRS Connectors . . . . . . . . . . . . . . . . . . . . .

2A–29

Inflator Module . . . . . . . . . . . . . . . . . . . . . . . .

2A–31

Inflator Module and Associated Parts . . . . .

2A–31

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–31

Inspection and Repair. . . . . . . . . . . . . . . . .

2A–32

Installation. . . . . . . . . . . . . . . . . . . . . . . . . .

2A–32

Steering Wheel . . . . . . . . . . . . . . . . . . . . . . .

2A–33

Steering Wheel and Associated Parts . . . .

2A–33

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–33

Installation. . . . . . . . . . . . . . . . . . . . . . . . . .

2A–35

Combination Switch . . . . . . . . . . . . . . . . . . . .

2A–36

Combination Switch and Associated Parts .

2A–36

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–36

Installation. . . . . . . . . . . . . . . . . . . . . . . . . .

2A–38

Lock Cylinder . . . . . . . . . . . . . . . . . . . . . . . . .

2A–40

Lock Cylinder and Associated Parts . . . . . .

2A–40

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–40

Installation. . . . . . . . . . . . . . . . . . . . . . . . . .

2A–42

System Inspection . . . . . . . . . . . . . . . . . . .

2A–43

Steering Column . . . . . . . . . . . . . . . . . . . . . .

2A–44

Steering Column and Associated Parts . . .

2A–44

Removal . . . . . . . . . . . . . . . . . . . . . . . . . . .

2A–44

Installation. . . . . . . . . . . . . . . . . . . . . . . . . .

2A–46

System Inspection . . . . . . . . . . . . . . . . . . .

2A–47

Supplemental Restraint System Steering

Wheel & Column and Associated Parts . . .

2A–48

Main Data and Specifications . . . . . . . . . . . .

2A–48

Special Tools . . . . . . . . . . . . . . . . . . . . . . .

2A–48

SECTION

2A–2

POWER-ASSISTED STEERING SYSTEM

Service Precaution

WARNING: THIS VEHICLE HAS A SUPPLEMENTAL
RESTRAINT SYSTEM (SRS). REFER TO

THE SRS

COMPONENT AND WIRING LOCATION VIEW IN

ORDER TO DETERMINE WHETHER YOU ARE
PERFORMING SERVICE ON OR NEAR THE SRS
COMPONENTS OR THE SRS WIRING. WHEN YOU
ARE PERFORMING SERVICE ON OR NEAR THE
SRS COMPONENTS OR THE SRS WIRING, REFER
TO

THE SRS SERVICE INFORMATION. FAILURE TO

FOLLOW WARNINGS COULD RESULT IN POSSIBLE
AIR BAG DEPLOYMENT, PERSONAL INJURY, OR
OTHERWISE UNNEEDED SRS SYSTEM REPAIRS.

CAUTION: Always use the correct fastener in the
proper location. When you replace a fastener, use
ONLY the exact part number for that application.
ISUZU will call out those fasteners that require a
replacement after removal. ISUZU will also call out
the fasteners that require thread lockers or thread
sealant. UNLESS OTHERWISE SPECIFIED, do not
use supplemental coatings (Paints, greases, or
other corrosion inhibitors) on threaded fasteners or
fastener joint interfaces. Generally, such coatings
adversely affect the fastener torque and the joint
clamping force, and may damage the fastener.
When you install fasteners, use the correct
tightening sequence and specifications. Following
these instructions can help you avoid damage to
parts and systems.

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
Condition, always road test the vehicle first. Proceed
with the following 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 hub unit
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.

Parts in power steering valve
defective.

Replace power steering unit.

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 Hub unit bearings.

Replace Hub unit bearing.

Wobbly wheel or tires.

Replace wheel or tire.

Tires not adequately inflated.

Adjust the pressure.

POWER-ASSISTED STEERING SYSTEM

2A–3

Wheel Hop

Blister or bump on tire.

Replace tire.

Improper shock absorber operation.

Replace shock absorber.

Shimmy, Shake or Vibration

Tire or wheel out of balance.

Balance wheels or replace tire/or
wheel.

Worn steering linkage ball joints.

Replace ball joints.

Worn upper or lower end ball joints.

Replace ball joints.

Excessive wheel run–out.

Repair or replace wheel and/or tire.

Blister or bump on tire.

Replace tire.

Excessive loaded radial run–out 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 unit.

Tighten steering unit.

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.

Parts in power steering valve
defective.

Replace power steering unit.

Hard Steering

Bind in steering linkage ball studs,
upper or lower end ball joint.

Replace ball joint.

Improper wheel alignment.

Check wheel alignment.

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 unit or linkage.

Retighten or repair.

Worn or loose steering shaft
universal joint.

Retighten or replace steering shaft.

Worn steering linkage ball joints.

Replace ball joints.

Worn upper or lower end ball joints.

Replace ball joints.

Poor Steering Wheel Returnability

Bind in steering linkage ball joints.

Replace ball joints.

Bind in upper or lower end 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.

Condition

Possible Cause

Correction

2A–4

POWER-ASSISTED STEERING SYSTEM

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.

Condition

Possible Cause

Correction