ISUZU AXIOM 2002 Service Repair Manual

WHEEL AND TIRE SYSTEM3E±9
Localized tread wear.
480RW004
1. Once spotty wear develops in tread due to hard
braking or abrupt starting, localized wear tends to be
promoted.
Shoulder wear (generally wear develops in outer shoul-
der):
480RW005
1. Camber or toe-in incorrect.
2. Shoulder wear caused by repeated hard-cornering.Wear in shoulders at points opposed to each other.
480RW006
1. Tire or wheel out of round or distorted.
2. Play in bearings or ball joint.
Premature wear in shoulders.
480RW007
1. Flexing of tire excessive due to under-inflation.

3E±10WHEEL AND TIRE SYSTEM
One sided feather edging.
480RW008
1. Wear caused by repeated hard cornering.
2. Camber or toe-in incorrect.

WHEEL AND TIRE SYSTEM3E±11
Wheel
Wheel and Associated Parts
480R200004
Legend
(1) Wheel Lug Nut
(2) Alumi Wheel and Tire
Removal
1. Loosen wheel lug nut by approximately 180
(half a
rotation), then raise the vehicle and remove the nuts.
2. Remove wheel and tire.
NOTE: Never use heat to loosen a tight wheel lug nut.
The application of heat to the hub can shorten the life of
the wheel and may cause damage to wheel bearings.
Installation
1. Install wheel and tire.
2. Install wheel lug nut, and lower the vehicle. Tighten
the wheel lug nuts to the specified torque in numerical
order.
Torque: 118 N´m (87 lb ft)
CAUTION: Before installing wheels, remove any
build-up of corrosion on the wheel mounting surface
and brake disc mounting surface by scraping and
wire brushing. Installing wheels without good
metal-to-metal contact at mounting surfaces can
cause wheel nuts to loosen, which can later allow a
wheel to come off while the vehicle is moving.NOTE: Valve caps should be on the valve stems to keep
dust and water out.
480R200003

3E±12WHEEL AND TIRE SYSTEM
Tire
Tire Replacement
When replacement is necessary, the original metric tire
size should be used. Most metric tire sizes do not have
exact corresponding alphanumeric tire sizes. It is
recommended that new tires be installed in pairs on the
same axle. If necessary to replace only one tire, it should
be paired with tire having the most tread, to equalize
braking traction.
CAUTION: Do not mix different types of tires such
as radial, bias and bias-belted tires except in
emergencies, because vehicle handling may be
seriously affected and may result in loss of control.
Tire Dismounting
Remove valve cap on valve step and deflate the tire. Then
use a tire changing machine to mount or dismount tires.
Follow the equipment manufacturer's instruction. Do not
use hand tools or tire lever alone to change tires as they
may damage the tire beads or wheel rim.
Tire Mounting
Rim bead seats should be cleaned with a wire brush or
coarse steel wool to remove lubricants, and light rust.
Before mounting a tire, the bead area should be well
lubricated with an approved tire lubricant.
After mounting, inflate the tire to 196kPa (28 psi) so that
beads are completely seated. Inflate the air to specified
pressure and install valve cap to the stem.
WARNING: NEVER STAND OVER TIRE WHEN
INFLATING. BEAD MAY BREAK WHEN BEAD SNAPS
OVER RIM'S SAFETY HUMP AND CAUSE SERIOUS
PERSONAL INJURY.
NEVER EXCEED 240 KPA (35 PSI) PRESSURE WHEN
INFLATING. IF 240 KPA (35 PSI) PRESSURE WILL
NOT SEAT BEADS, DEFLATE, RE-LUBRICATE AND
RE-INFLATE. OVER INFLATION MAY CAUSE THE
BEAD TO BREAK AND CAUSE SERIOUS PERSONAL
INJURY.
Tire Repair
There are many different materials on the market used to
repair tires.
Manufacturers have published detailed instructions on
how and when to repair tires. These instructions can be
obtained from the tire manufacturer if they are not
included with the repair kit.
Wheel Inspection
Damaged wheels and wheels with excessive run-out
must be replaced.
Wheel run out at rim (Base on hub Bore):
Aluminum
1± Vertical play: Less than 0.55 mm (0.022 in)
2± Horizontal play: Less than 0.55 mm (0.022 in)
480RS012
General Balance Procedure
Deposits of mud, etc. must be cleaned from the inside of
the rim.
The tire should be inspected for the following: match
mount paint marks, bent rims, bulges, irregular tire wear,
proper wheel size and inflation pressure. Then balance
according to the equipment manufacturer's
recommendations.
There are two types of wheel and tire balance.
Static balance is the equal distribution of weight around
the wheel.
Assemblies that are statically unbalanced cause a
bouncing action called tramp. This condition will
eventually cause uneven tire wear.

WHEEL AND TIRE SYSTEM3E±13
480RS013
Legend
(1) Heavy Spot Wheel Shimmy
(2) Add Balance Weights Here
Dynamic balance is the equal distribution of weight on
each side of the wheel center-line so that when the tire
spins there is no tendency for the assembly to move from
side to side. Assemblies that are dynamically unbalanced
may cause shimmy.
480RS014
Legend
(1) Heavy Spot Wheel Hop
(2) Add Balance Weights Here
WARNING: STONES SHOULD BE REMOVED FROM
THE TREAD TO AVOID OPERATOR INJURY DURING
SPIN BALANCING AND TO OBTAIN A GOOD
BALANCE.
Balancing Wheel and Tire
On-vehicle Balancing
On-Vehicle balancing methods vary with equipment and
tool manufacturers. Be sure to follow each
manufacturer's instructions during balancing operation.
Off-vehicle Balancing
Most electronic off-vehicle balancers are more accurate
than the on-vehicle spin balancers. They are easy to use
and give a dynamic balance. Although they do not correct
for drum or disc unbalance (as on- vehicle spin balancing
does), they are very accurate.
480RS015

3E±14WHEEL AND TIRE SYSTEM
Main Data and Specifications
General Specifications
WheelsSize17 y 7JJ
Offset38.0 mm (1.50 in)
P.C.D., wheel studs139.7 mm (5.50 in)
Standard tireSizeP235/65R17
Pressure(Front)180 kPa (26 psi)
Pressure(Rear)180 kPa (26 psi)
Torque Specifications
480R200005

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.