2002 ISUZU AXIOM battery

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.

INTELLIGENT SUSPENSION3F±25
DTC6 Stop Lamp Switch Open Circuit or Short
Circuit Description
The brake switch is used to indicate brake pedal status.
The normally opened brake switch signal voltage circuit is
opened.
Brake switch supplies a B+ signal on circuit RED to the
control unit when the brakes are applied. The control unit
uses this signal to work dive control when the brakes are
applied.
Diagnostic Aids

Inspect the wiring for poor electrical connections at
the control unit and brake switch. Look for possible
bent, backed out, deformed or damaged terminals.
Check for weak terminal tension as well. Also check
for a chafed wire that could short to bare metal or
other wiring. Inspect for a broken wire inside the
insulation.

When diagnosing for a possible intermittent short or
open condition, move the wiring harness while
observing test equipment for a change.

Check customer driving habits and/or unusual driving
conditions (i.e. stop and go, highway).

Check brake switch for proper mounting and
adjustment.
DTC6 Stop Lamp Switch Open Circuit or Short
StepActionValue(s)Ye sNo
11. With the engine ªoffº, turn the ignition switch ªonº. If
ABS code is set, check applicable fuse.
2. Apply then release the brake pedal.
Does the brake lamp come on when the brake pedal is
applied and does it come off when the brake pedal is
released?
Ð
Go to
Diagnostic
Aids
Go to Step 2
21. Connect the test light to ground.
2. Back probe ignition feed circuit terminal I±31
terminal 1 at the brake switch.
Is the test light ªonº?
ÐGo to Step 3Go to Step 4
31. Connect the test light to ground.
2. Back probe circuit terminal I±31 terminal 4 at the
brake switch.
Is the test light ªoffº?
ÐGo to Step 7Go to Step 5
4Repair the open in battery feed circuit terminal I±31
terminal 1 to the brake switch.
If fuse is open, check circuit terminal I±31 terminal 4 for
a short to ground.
Is the replacement complete?
ÐGo to Step 13Ð
5Disconnect brake switch connector I±31 and ignition
switch ªonº.
Is the test light ªonº?
ÐGo to Step 8Go to Step 6
6Check the brake switch short (I±31 terminal 1 and I±31
terminal 4).
Was a problem found?
ÐGo to Step 9Go to Step 10
7Check circuit terminal I±31 terminal 4 for a short to
voltage.
Ignition switch ªonº.
Is the test light ªonº?
ÐGo to Step 8Go to Step 10
81. Disconnect the control unit connector C±44.
2. Check circuit terminal I±31 terminal 4 for a short to
voltage.
Was a problem found?
ÐGo to Step 13Go to Step 10

INTELLIGENT SUSPENSION3F±33
Removal
1. Disconnect the battery ground cable.
2. Remove the front console assembly.
Refer to
Consoles in Body and Accessories section.
3. Disconnect the connector from the control unit.
View A
828RY00002
Legend
(1) Nut
(2) Screw(3) Control Unit
(4) Bracket
4. Remove 4 nuts.
5. Disconnect the control unit with brackets.
6. Remove 4 screws.
7. Disconnect the control unit from brackets.
Installation
To install, follow the removal steps in the reverse order,
noting the following points.
Torque:
Nut (1) 8N´m (69 lb in)

INTELLIGENT SUSPENSION3F±35
Removal
1. Disconnect the battery ground cable.
2. Disconnect the connector from the harness and
remove the connector from the bracket.
3. Remove the clip.
View B
450RY00005
Legend
(1) Screw
(2) Actuator
(3) Nut
(4) Bracket
(5) Nut
(6) Washer
(7) Shock Absorber
1. Remove 2 screws.
2. Remove the actuator.
3. Remove the nut (3).
4. Disconnect bracket.
5. Remove the nut (5).
6. Disconnect the washer.
7. Remove the shock absorber.
Refer to
Shock Absorber in this section.
Inspection and Repair
Refer to shock Abosorber in this section.
Installation
1. Install the shock absorber.
Refer to
Shock Absorber in this section.
2. Install the washer and nut (5), then tighten it to the
specified torque.
Torque: 15 N´m (11 lb ft)
3. Install the bracket and nut (3), then tighten it to the
specified torque.
Torque: 39 N´m (29 lb ft)
NOTE: Fix the lower nut with wrench not to turn and
tighten upper nut.
4. Fit the top of the shock absorber rod in the connection
part of the actuator.
NOTE:
The mating section is width fitting across flats.
If these normally fit, the distance between the
actuator lower face and the bracket upper face is
about 1 mm.
5. Install 2 screws then tighten it to the specified torque.
3 N´m (26 lb in)
6. Connect the connector to the harness and insert the
connector to the bracket.
7. Connect the actuator harness with the clip.
8. Connect the battery ground cable.

INTELLIGENT SUSPENSION3F±37
Removal
1. Disconnect the battery ground cable.
2. Disconnect the connector (1) from the harness and
remove the connector (1) from the bracket (4).
3. Remove the clip (2).
4. Remove the rear shock absorber (3).
Refer to
Shock Absorber in this section.
5. Disconnect the connector (10) from the harness and
remove the connector (10) from the gusset (11).
6. Remove the 2 bolts (5).
7. Disconnect the G-sensor (6).
Inspection and Repair
Refer to Shock Absorber in this section.
Installation
1. Set the G-sensor on the gusset (11).
2. Install 2 bolts (5) then tighten it to the specified torque.
Torque: 7 N´m (61 lb in)
3. Connect the connector (10) to the harness and insert
the connector (10) to the gusset (11).
4. Install the rear shock absorber (3).
Refer to
Shock Absorber in this section.
5. Connect the connector (1) to the harness and insert
the connector (1) to the bracket (4).
6. Insert the clip (2) to the bracket (4).
7. Connect the battery ground cable.

4B1±7
DRIVELINE CONTROL SYSTEM
Shift On The Fly Controller
Shift On The Fly Controller and Associated Parts
828RY00003
Legend
(1) Nut(2) SOF Controller
(3) Connector
Removal
1. Disconnect the battery ground cable.
2. Remove the front console assembly.
Refer to
Consoles in Body and Accessories section.
3. Disconnect the connector from the controller.
4. Remove the nut.
5. Remove the controller.
Installation
To install, follow the removal steps in the reverse order,
noting the following points.
Torque: Nut (1) 8 N´m (69 Ib in)

4B2±3
DRIVE LINE CONTROL SYSTEM (TOD)
TOD Control
The TOD position usually drives the rear wheels, and
transmits the torque to the front wheels with the help of
electronically controlled torque split mechanism
according to running conditions encountered. The driving
force is directly transmitted to the rear wheels. This force
is split by the transfer and delivered to the front wheels.
The magnitude of the torque transmitted to the front
wheels is controlled by changing the pressing force of the
multi plate disk clutch built in the transfer unit. The
pressing force of the clutch is controlled by changing the
duty ratio to the electromagnetic coil mounted to the rear
of the clutch. When the clutch is completely disengaged,
the rear wheels are driven. When the clutch is completely
engaged, a rigid four wheel drive mode is obtained. The
torque split status is controlled continuously between the
rear wheel and four wheel drive modes. This system
includes front and rear speed sensors, and receives
throttle position sensor and engine speed information
from the PCM, ABS control unit signal, brake switch
signal, and shift motor position information.
The control unit receives signals sent from these sensors
and changes the pressing force of the multi-plate disk
clutch to determine the torque distribution on the front and
rear wheels. Therefore, when the slip of the rear wheels is
increased against the current torque level in the normal
rear wheel drive mode, the control unit detects the slip
condition, determines the optimum torque based on the
feedback control logic, and increases the torque to the
front wheels.
The control unit uses the signal from the throttle position
sensor to predict the future vehicle condition and the
intention of the driver with respect to acceleration and
deceleration, and determines the initial torque distribution
using these data and the information from the speed
sensors.
In case of small circle turning in the parking lot, for
example, the control unit minimizes the clutch pressing
force to restrict a braking phenomenon. When the ABS
becomes active, the control unit optimizes the clutch
pressing force to ensure stable braking.
TOD Indicator Control
The TOD indicator on the instrument panel informs the
driver of the current working status of the transfer unit.
The information is the drive mode (2H, TOD, 4L,
transition). The indicator can display occasional errors
and corresponding error codes.
Abbreviations
ABS Anti-lock Brake System
ADC Axle Disconnect
(Shift on the fly system)
VB Battery Voltage
VIGN Ignition Voltage

4B2±31
DRIVE LINE CONTROL SYSTEM (TOD)
Check
Pin
No.Note Standard Value Measure
between
Pin No. Unit
Scale/
Range Engine
State Ignition
Switch
Position Circuit to be
tested
364WD
OUTOFFSTOP
36, 477 ~12 k
Disconnect battery GND terminal
11EMC(+)OFFSTOP
11, 221.0 ~5.0
Disconnect battery GND terminal
30TOD SW
AONSTOPDCV30 (+), 47
(±)SW: TOD, 4L: 0
V
SW:2H:8.0 ~
14.5 V
43TOD
SWBONSTOPDCV43 (+), 47
(±)SW: 2H,
TOD:0V
SW: 4L: 8.0 ~
14.5V
40LIGHTONSTOPDCV40 (+), 47
(±)SW OFF : 0 V
SW ON : 8.0 ~
14.5 V
19IND BONSTOPDCV19 (+), 47
(±)8.0 ~14.5 VWhen the indicator lamp is turned
off
8IND CONSTOPDCV8 (+), 47
(±)8.0 ~ 14.5 VWhen the indicator lamp is turned
off
27AT POSCONSTOPDCV27 (+), 47
(±)ON:D, 3, 2, 1
OFF:PRNON:8.0 ~ 14.5 V
OFF:0V
41AT POSBONSTOPDCV41 (+), 47
(±)ON:R, N, D, 3
OFF:P, 2, 1ON:8.0 ~ 14.5 V
OFF:0V
28AT POSAONSTOPDCV28 (+), 47
(±)ON:P, R, 3, 2
OFF:N, D, 1ON:8.0 ~ 14.5 V
OFF:0V
2ENG REVONRUNms2, 47Waveform
(PWM)50 ms (1000 rpm)