intelligent ISUZU AXIOM 2002 Service Repair Manual

SECTION TABLE OF CONTENTS
GENERAL INFORMATION
0AGeneral Information
0BMaintenance and Lubrication
WORKSHOP MANUAL
HEATING, VENTILATION AND AIR
CONDITIONING
1AHVAC System
STEERING
2APower-Assisted System
AXIOM
(UPR/S)SUSPENSION
3CFront Suspension
3DRear Suspension
3EWheel and Tire System
3FIntelligent Suspension System
DRIVELINE/AXLE
4A1Differential (Front)
4A2Differential (Rear)
4B1Driveline Control System
4B2Driveline Control System (TOD)
4CDrive Shaft System
4D2Transfer Case (TOD)
FOREWORD
This manual includes special notes, impor tant points, service data,
precautions, etc. That are needed for the maintenance, adjustments,
service, removal and installation of vehicle components.
All information, illustrations and specifications contained in this manual
are based on the latest product information available at the time of
publication.
All rights are reserved to make changes at any time without notice.
Arrangement of the material is shown in the table of contents on the
right-hand side of this page. A black spot on the first page of each
section can be seen on the edge of the book below each section title.
These point to a more detailed table of contents preceding each
section.BRAKE
5ABrake Control System
5BAnti-Lock Brake System
5CPower-Assisted Brake System
5D1Parking Brake System (4´4 model)
5D2Parking Brake System (4´2 model)
ENGINE
6AEngine Mechanical
6BEngine Cooling
6CEngine Fuel
6D1Engine Electrical
6D2Ignition System
6D3Starting and Charging System
6EDriveability and Emissions
6FEngine Exhaust
6GEngine Lubrication
6HEngine Speed Control System
6JInduction
TRANSMISSION
7AAutomatic Transmission
7A1Transmission Control System
BODY AND ACCESSORIES
8ALighting System
8BWiper/Washer System
This manual applies to 2002 models.8CEnter tainment
8DWiring System
8EMeter and Gauge
8FBody Structure
8GSeats
8HSecurity and Locks
8ISun Roof/Convertible Top
8JExterior/Interior Trim
RESTRAINTS
9ASeat Belt System
9JSupplemental Restraint System (Air Bag System)
9J1Restraint Control System
CONTROL SYSTEM
10ACruise Control System

FRONT SUSPENSION3C±1
AXIOM
SUSPENSION
CONTENTS
Front Suspension 3C±1. . . . . . . . . . . . . . . . . . . . . . .
Rear Suspension 3D±1. . . . . . . . . . . . . . . . . . . . . . . .
Wheel and Tire System 3E±1. . . . . . . . . . . . . . . . . . Intelligent Suspension Control 3F±1. . . . . . . . . . . .
FRONT SUSPENSION
CONTENTS
Service Precaution 3C±1. . . . . . . . . . . . . . . . . . . . . .
General Description 3C±2. . . . . . . . . . . . . . . . . . . . .
Diagnosis 3C±2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shock Absorber 3C±5. . . . . . . . . . . . . . . . . . . . . . . . .
Shock Absorber and Associated Parts 3C±5. . . .
Removal 3C±5. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3C±5. . . . . . . . . . . . . . . . . .
Installation 3C±5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stabilizer Bar 3C±6. . . . . . . . . . . . . . . . . . . . . . . . . . .
Stabilizer Bar and Associated Parts 3C±6. . . . . .
Removal 3C±6. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3C±6. . . . . . . . . . . . . . . . . .
Installation 3C±6. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torsion Bar 3C±7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Torsion Bar and Associated Parts 3C±7. . . . . . . .
Removal 3C±7. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3C±8. . . . . . . . . . . . . . . . . .
Installation 3C±8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Knuckle 3C±10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Knuckle and Associated Parts 3C±10. . . . . . . . . . .
Removal 3C±10. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3C±11. . . . . . . . . . . . . . . . . .
Installation 3C±11. . . . . . . . . . . . . . . . . . . . . . . . . . . . Upper Control Arm 3C±13. . . . . . . . . . . . . . . . . . . . . .
Upper Control Arm and Associated Parts 3C±13.
Removal 3C±13. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3C±14. . . . . . . . . . . . . . . . . .
Installation 3C±14. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lower Control Arm 3C±16. . . . . . . . . . . . . . . . . . . . . .
Lower Control Arm and Associated Parts 3C±16.
Removal 3C±16. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3C±17. . . . . . . . . . . . . . . . . .
Installation 3C±18. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Upper Ball Joint 3C±19. . . . . . . . . . . . . . . . . . . . . . . . .
Upper Ball Joint and Associated Parts 3C±19. . . .
Removal 3C±19. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3C±20. . . . . . . . . . . . . . . . . .
Installation 3C±20. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lower Ball Joint 3C±21. . . . . . . . . . . . . . . . . . . . . . . . .
Lower Ball Joint and Associated Parts 3C±21. . . .
Removal 3C±21. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3C±22. . . . . . . . . . . . . . . . . .
Installation 3C±22. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Main Data and Specifications 3C±23. . . . . . . . . . . . .
Special Tools 3C±25. . . . . . . . . . . . . . . . . . . . . . . . . . .
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.

FRONT SUSPENSION3C±5
Shock Absorber
Shock Absorber and Associated Parts
450R200001
Legend
(1) Nut
(2) Rubber Bushing and Washer
(3) Bolt and Nut
(4) Shock Absorber(5) Rubber Bushing and Washer
(6) Actuator Bracket
(7) Actuator
(8) Screw
Removal
1. Raise the vehicle and support it with suitable safety
stands.
2. Remove wheel and tire assembly. Refer to
Wheel
Replacement in this section.
3. Remove bolt and nut.
4. Remove ISC Actuator and Bracket. Refer to
Intelligent Suspension.
5. Remove nut.
6. Remove rubber bushing and washer.
7. Remove shock absorber.
8. Remove rubber bushing and washer.
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition are
found through inspection.
Check the following parts :
Shock absorber

Rubber bushing
Installation
1. Install rubber bushing and washer.
2. Install shock absorber.
3. Install rubber bushing and washer.
4. Install nut, then tighten it to the specified torque.
Torque: 20 N´m (14 lb ft)
5. Install ISC Actuator and Bracket. Refer to
Intelligent
Suspension.
6. Install bolt and nut, then tighten to the specified
torque.
Torque: 93 N´m (69 lb ft)

3D±6REAR SUSPENSION
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition are
found through inspection.
Check the following parts:

Coil spring

Insulator
Installation
1. Install coil spring and make sure that the coil spring is
installed in the proper position. Paint mark(1) should
be downward.
460RW001
2. Fit the end of the coil spring to the coil spring seat and
mount the coil spring on the rear axle case.
460RW004
3. Install the insulator on the coil spring. Jack up the axle
case gently with the top of the coil spring set to the
spring seat on the frame side.
460RW013
4. Install shock absorber and make sure that installed in
the proper position. (Refer to
Intelligent Suspension)
Tighten the nut lightly, then retighten it to the specified
torque after the vehicle is at curb height.
NOTE: When mounting shock absorber, be sure not to
use grease on bushings or any other nearby part.
Torque: 78 N´m (58 lb ft)
5. Install stabilizer bar.
Torque: 31 N´m (23 lb ft)
6. Install upper link with rubber plate and tighten fixing
bolt.
Torque: 137 N´m (101 lb ft)
7. Install breather hose.
8. Connect brake hose and bleed the brake system.
Refer to
Bleeding the Brake Hydraulic System in
Brake section.

REAR SUSPENSION3D±7
Shock Absorber
Shock Absorber and Associated Parts
461R200001
Legend
(1) Nut, Bush and Washer(2) Shock Absorber
(3) Nut and Washer
Removal
1. Remove shock absorber fixing nut, bush and washer
(upper side).
2. Remove shock absorber fixing nut and washer (lower
side).
3. Remove shock absorber.
Inspection and Repair
Make necessary correction or parts replacement if wear,
damage, corrosion or any other abnormal condition are
found through inspection.
Check the following parts:

Shock absorber

Rubber bushing
NOTE: When mounting rubber bushings, be sure not to
use grease on bushings or any other nearby part.
Installation
1. Install shock absorber. When mounting shock
absorber, make sure to be installed in the proper
position and not to use grease on bushings or any
other nearby part. (Refer to
Intelligent Suspension)
2. Install nut and washer (lower side), then tighten the
nut lightly. Retighten to the bolt and nut specified
torque after the vehicle is at curb height.
Torque: 78 N´m (58 lb ft)
3. Install nut, bush and washer (upper side), then tighten
the nut lightly. Retighten to the nut specified torque
after the vehicle is at curb height.
Torque: 20 N´m (14 lb ft)

INTELLIGENT SUSPENSION3F±1
AXIOM
SUSPENSION
INTELLIGENT SUSPENSION CONTROL
CONTENTS
Service Precaution 3F±2. . . . . . . . . . . . . . . . . . . . . .
General Description 3F±2. . . . . . . . . . . . . . . . . . . . .
PIN ASSIGNMENT TABLE 3F±4. . . . . . . . . . . . .
System Components 3F±4. . . . . . . . . . . . . . . . . . .
Control Unit 3F±4. . . . . . . . . . . . . . . . . . . . . . . . . . .
Actuator 3F±4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustable Damping Force Shock Absorber 3F±4
Warning Lamp 3F±4. . . . . . . . . . . . . . . . . . . . . . . .
Vertical G-Sensor 3F±5. . . . . . . . . . . . . . . . . . . . . .
Lateral G-Sensor 3F±5. . . . . . . . . . . . . . . . . . . . . .
Acronyms and Abbreviations 3F±5. . . . . . . . . . . .
General Diagnosis 3F±5. . . . . . . . . . . . . . . . . . . . . . .
General Information 3F±5. . . . . . . . . . . . . . . . . . . .
Service Precautions 3F±5. . . . . . . . . . . . . . . . . . .
Computer System Service Precautions 3F±5. . .
General Service Precautions 3F±5. . . . . . . . . . . .
Parts Handling 3F±5. . . . . . . . . . . . . . . . . . . . . . . .
FLASHING CODES 3F±6. . . . . . . . . . . . . . . . . . . .
CLEAR DTC 3F±7. . . . . . . . . . . . . . . . . . . . . . . . . .
INTERMITTENT CONDITIONS 3F±8. . . . . . . . .
BULB CHECK 3F±8. . . . . . . . . . . . . . . . . . . . . . . . .
DTC CHECK 3F±8. . . . . . . . . . . . . . . . . . . . . . . . . .
Connector List 3F±14. . . . . . . . . . . . . . . . . . . . . . . .
Diagnostic Trouble Code (DTC)
Identification 3F±16. . . . . . . . . . . . . . . . . . . . . . . . .
DTC2 Actuator Coil Over Current 3F±17. . . . . . . . . .
Circuit Description 3F±17. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 3F±17. . . . . . . . . . . . . . . . . . . . . . . .
DTC3 Actuator Coil/Position Sensor Open
Circuit or Short 3F±19. . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Description 3F±19. . . . . . . . . . . . . . . . . . . . . Diagnostic Aids 3F±19. . . . . . . . . . . . . . . . . . . . . . . .
DTC4 G-Sensor Open Circuit or Short 3F±22. . . . .
Circuit Description 3F±22. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 3F±22. . . . . . . . . . . . . . . . . . . . . . . .
DTC5 Vehicle Speed Sensor Open Circuit
or Short 3F±23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Description 3F±23. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 3F±23. . . . . . . . . . . . . . . . . . . . . . . .
DTC6 Stop Lamp Switch Open Circuit
or Short 3F±25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Description 3F±25. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 3F±25. . . . . . . . . . . . . . . . . . . . . . . .
DTC7 Engine Speed Signal Open Circuit
or Short 3F±27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Circuit Description 3F±27. . . . . . . . . . . . . . . . . . . . .
Diagnostic Aids 3F±27. . . . . . . . . . . . . . . . . . . . . . . .
DTC9 Control Unit Abnormality 3F±28. . . . . . . . . . . .
Control Unit 3F±32. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 3F±33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation 3F±33. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Actuator 3F±34. . . . . . . . . . . . . . . . . . . . . . . . . .
Removal 3F±35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3F±35. . . . . . . . . . . . . . . . . . . .
Installation 3F±35. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Shock Absorber 3F±36. . . . . . . . . . . . . . . . . . . .
Removal 3F±37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inspection and Repair 3F±37. . . . . . . . . . . . . . . . . . . .
Installation 3F±37. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3F±2INTELLIGENT SUSPENSION
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.
General Description
Intellignet suspension control uses a microcomputer as a
control unit to judge running conditions including engine
revolution from Powertrain Control Module, vehicle speed
from vehicle speed sensor, a brake switch signal, and
vertical and lateral G-sensor signal, then sets optimum
damping force so that best running stability can be
achieved.

INTELLIGENT SUSPENSION3F±3
826R200007

3F±4INTELLIGENT SUSPENSION
PIN ASSIGNMENT TABLE
PIN
No.NAMEPIN
No.NAMEPIN
No.NAMEPIN
No.NAME
1GND17KI-FR B33KI-RR PSW49STOP
2NC18KI-FR D34KI-RL Vcc50T-SW
3Vdd19KI-FL B35KI-FR GND51M-SW
4KI-FR A20KI-FL D36KI-FR Vs52Txd
5KI-FR C21KI-RR B37KI-FL PSW53Vig
6KI-FL A22KI-RR D38KI-FL Vs54NC
7KI-FL C23KI-RL B39KI-FL GND55G3 GND
8KI-RR A24KI-RL D40KI-RR GND56G3 Vs
9KI-RR C25Vig41KI-RL PSW57NC
10KI-RL A26GND42KI-RL GND58NC
11KI-RL C27KI-FR Vcc43M.L59E/G
12Vbat28KI-FR Vout44G3 Vcc60W. L
13GND29KI-FR PSW45G3 Vout61GND
14GND30KI-FL Vout46NC62GND
15NC31KI-FL Vcc47NC63Rxd
16Vdd32KI-RR Vcc48VSP64GND
NC: NO CONNECTION
System Components
Control Unit, 3 Vertical G-sensors, Lateral G-sensor, 4
Actuators, 4 Adjustable Damping Force Shock
Absorbers, and Warning Lamp.
Control Unit
The Control Unit consists of Adjustable Damping Force
Shock Absorber control circuits, fault detector, and a
fail-safe. It drives the actuator according to the signal
from each sensor.
The Control Unit has a self-diagnosing function which can
indicate faulty circuits during diagnosis.
The Control Unit is mounted in the center of the
instrument panel.
Actuator
Front actuators installed on front shock absorbers and
rear actuator installed inside rear shock absorbers control
damping force of shock absorber by the Control Unit
signal.
Adjustable Damping Force Shock
Absorber
This type shock absorber is used in front and rear
intelligent suspension. According to running condition the
Control Unit changes shock absorber damping force and
obtains good running stability.
Warning Lamp
821R200011Vehicles equipped with the Intelligent Suspension Control
have an amber warning lamp in the instrument panel. The
warning lamp will illuminate if a malfunction in the
Intelligent Suspension Control is detected by the Control
Unit. In case of an important electronic malfunction, the
Control Unit will turnªONº the warning lamp.

INTELLIGENT SUSPENSION3F±5
Vertical G-Sensor
Front G-sensors installed inside front actuators and the
rear G-sensor installed on the rear left frame side detect
the vehicle vertical gravity and send a signal to the Control
Unit.
Lateral G-Sensor
The G-sensor installed inside the Control Unit detects the
vehicle turning speed and sends a signal to the Control
Unit.
Acronyms and Abbreviations
Several acronyms and abbreviations are commonly used
throughout this section:
BATT
Battery
DLC
Data Link Connector
DTC
Diagnostic Trouble Code
FL
Front Left
FR
Front Right
GND
Ground
HARN
Harness
IG
Ignition
PCM
Powertrain Control Module
RL
Rear Left
RR
Rear Right
SW
Switch
W/L
Warning Lamp
Vout
Voltage output
General Diagnosis
General Information
Intelligent Suspension Control troubles can be classified
into two types, those which can be detected by the
warning lamp and those which can be detected as a
vehicle abnormality by the driver.
In either case, locate the fault in accordance with
theªBASIC DIAGNOSTIC FLOWCHARTº and repair.
Please refer to
Section 3 for the diagnosis of mechanical
troubles such as abnormal noise, vehicle pulls, excessive
tire wear, wheel hop and shimmy, shake or vibration.
Service Precautions
Required Tools and Items:

Box Wrench

Special Tool
Some diagnosis procedures in this section require the
installation of a special tool.
J-39200 High Impedance Multimeter
When circuit measurements are requested, use a
circuit tester with high impedance.
Computer System Service Precautions
The Intelligent Suspension Control interfaces directly
with the Control Unit which is a control computer that is
similar in some regards to the Powertrain Control Module.
These modules are designed to withstand normal current
draws associated with vehicle operation. However care
must be taken to avoid overloading any of the Control Unit
circuits. In testing for opens or shorts, do not ground or
apply voltage to any of the circuits unless instructed to do
so by the appropriate diagnostic procedure. These
circuits should only be tested with a high impedance
multimeter (J-39200) or special tools as described in this
section. Power should never be removed or applied to
any control module with the ignition in the ªONº
position.Before removing or connecting battery cables,
fuses or connectors, always turn the ignition switch to
theªOFFº position.
General Service Precautions
The following are general precautions which should be
observed when servicing and diagnosing the Intelligent
Suspension Control and/or other vehicle systems. Failure
to observe these precautions may result in Intelligent
Suspension Control damage.

If welding work is to be performed on the vehicle using
an electric arc welder, the Control Unit connectors
should be disconnected before the welding operation
begins.

The Control Unit connectors should never be
connected or disconnected with the ignitionªONº.
Parts Handling
Be careful when handling the actuator, control unit, or
G-sensor. They should not be dropped or thrown,
because the semi-conductor G-sensor tip damage may
result.