fuse ISUZU AXIOM 2002 Service Repair Manual

1A±30
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart ªAº Condenser Fan Does Not Run
StepActionYe sNo
1Are 30A fuse normal?Go to Step 2Replace
2Is relay (X-16) normal?Go to Step 3Replace
3Is pressure switch normal?
Go to Step 4
Switch defective
or insufficient
refrigerant.
4Is fan motor normal?Go to Step 5Replace
51. Disconnect condenser fan relay (X-16).
2. Check to see if battery voltage is present at the chassis side
relay terminal NO. X16-5.
Is there a battery voltage?
Go to Step 6
Repair open
circuit between
Condenser Fan
fuse (30A) and
No.X16-5.
61. Reconnect condenser fan relay (X-16).
2. Check to see if battery voltage is present at chassis side
connector terminal No.C21-3.
Is there a battery voltage?
Go to Step 7
Repair open
circuit between
fuse (10A) and
C21-3.
7Check to see if continuity between chassis side relay terminal
No.X16-2 and the chassis side connector terminal No.C21-4.
Is there a continuity?
Go to Step 8
Repair open
circuit.
8Check to see if continuity between chassis side connector
terminal No. C16-1 and chassis side relay terminal No.X16-1.
Is there a continuity?Poor ground or
open circuit
between chassis
side connector
terminal
No.X16-4 (or
No.C16-2) and
body ground
(No.C10).
Repair open
circuit.
Chart ªBº Condenser Fan Does Not Stop
StepActionYe sNo
11. Disconnect the triple pressure connector.
Does condenser fan stop?
Replace the triple
pressure switch.
Replace the
condenser fan
relay.

1A±88
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart ªAº: Check of Auto Amplifier Power Supply System
StepActionValue(s)Ye sNo
1Is the fuse C±5 normal?
ÐGo to Step 2
Replace the
fuse
2Is the fuse F±7 normal?
ÐGo to Step 3
Replace the
fuse
3Disconnect the auto A/C control unit connector I±19.
Is the battery voltage applied between the harness side
connector terminal No.I32±8 and the ground?
Approx. 12VGo to Step 5Go to Step 4
4Repair an open circuit between the fuse C±5 and
terminal No.I19±8.
Is the action complete?
ÐGo to Step 4Ð
5Is there continuity between the harness side connector
terminal No.I19±16 and the ground?
ÐGo to Step 7 Go to Step 6
6Repair an open circuit between terminal No.I19±16 and
the ground No.B±9.
Is the action complete?
ÐGo to Step 5Ð
7Turn the lighting switch on.
Is the battery voltage applied between the harness side
connector terminal No.I19±12 and the ground?
Approx. 12VGo to Step 9Go to Step 8
8Repair an open circuit between the lighting switch and
terminal No.I19±12.
Is the action complete?
ÐGo to Step 7Ð
9Turn the starter switch on.
Is the battery voltage applied between the harness side
connector terminal No.I19±7 and the ground?
Approx. 12VÐGo to Step 10
10Repair an open circuit between the fuse F±7 and
terminal No.I19±7.
Is the action complete?
ÐVerify repairÐ

1A±102
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
ConditionPossible causeCorrection
Does not work at allÐRefer to Chart A
Control failureÐRefer to Chart B
Chart A: Does Not Work At All
StepActionValue(s)Ye sNo
1Is the fuse FL±1 normal?
ÐGo to Step 2
Replace the
fuse
2Is the fuse F±7 normal?
ÐGo to Step 3
Replace the
fuse
3Is the relay X±1 normal?
ÐGo to Step 4
Replace the
relay
4Turn on the ignition switch. (the engine is run.)
Is the battery voltage applied between the harness side
connector terminal No.C33±3 and ground?
Approx 12VGo to Step 6Go to Step 5
5Repair an open circuit between terminal No.C33±3 and
No.X1±1.
Is the action complete?
ÐGo to Step 4Ð
6Is the battery voltage applied between the harness side
connector terminal No.C33±4 and ground?
Approx 12VGo to Step 8Go to Step 7
7Replace the intake actuator motor.
Is the action complete?
ÐGo to Step 6Ð
8Is there continuity between the harness side connector
terminal No.I19±11 and No.C33±4?
ÐGo to Step 10Go to Step 9
9Repair an open circuit between No.I19±11 and C33±4.
Is the action complete?
ÐVerify repairÐ
10Replace the auto air conditioner control unit.
Is the action complete?
ÐVerify repairÐ

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±103
Chart B: Failure on the Intake Control
StepActionValue(s)Ye sNo
1Is the fuse No.F±7 normal?
ÐGo to Step 2
Replace the
fuse
2Is the relay No.X±1 normal?
ÐGo to Step 3
Replace the
relay
3Turn on the ignition switch. (the engine is run.)
Is the intake actuator stopped?
ÐGo to Step 5Go to Step 4
4Replace or repair the auto air conditioner control unit.
Is the action complete?
ÐVerify repairÐ
5Is there continuity between the harness side connector
terminal No.C33±5 and No.I20±11?
ÐGo to Step 7Go to Step 6
6Repair an open circuit between terminal No.C33±5 and
No.I20±11.
Is the action complete?
ÐGo to Step 5Ð
7Is there continuity between the harness side connector
terminal No.C33±6 and No.I20±12?
ÐGo to Step 9Go to Step 8
8Repair an open circuit between terminal No.C33±6 and
No.I20±12.
Is the action complete?
ÐGo to Step 7Ð
9Is there continuity between the harness side connector
terminal No.C33±1 and No.I20±13?
ÐGo to Step 11Go to Step 10
10Repair an open circuit between terminal No.C33±1 and
I20-13.
Is the action complete?
ÐGo to Step 9Ð
11Is there continuity between the harness side connector
terminal No.C33±2 and No.I20±14?
ÐGo to Step 13Go to Step 12
12Repair an open circuit between harness No.C33±2 and
No.I20±14.
Is the action complete?
ÐGo to Step 11Ð
131. Disconnect the intake actuator connector No.C33.
2. Is the battery voltage applied between harness side
connector terminal
No.C33±6 and ground?
No.C33±2 and ground?
No.C33±1 and ground?
ÐGo to Step 14Go to Step 15
14Replace or repair the intake actuator.
Is the action complete?
ÐVerify repairÐ
15Replace or repair the air conditioner control unit.
Is the action complete?
ÐVerify repairÐ

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±111
ConditionPossible causeCorrection
The fan dose not rotate at allÐRefer to Chart A
The fan dose not rotate in the
MAX±HI modeÐRefer to Chart B
The fan dose not rotate in any mode
other than MAX±HIÐRefer to Chart C
The fan dose not stopÐRefer to Chart D
Chart A: Fan Does Not Rotate At All
StepActionValue(s)Ye sNo
1Are the fuse No.F±5, F±6 and No.F±7 normal?
ÐGo to Step 2
Replace the
fuse
2Are the relay No.X±1 and No.C±35 normal?
ÐGo to Step 3
Replace the
relay
3Turn on the ignition switch (the engine is run).
Is the battery voltage applied between the harness side
connector terminal No.C36±1 and ground?
ÐGo to Step 5Go to Step 4
4Repair an open circuit between terminal No.C36±1 and
No.F±5 and F±6 fuse.
Is the action complete?
ÐGo to Step 3Ð
5Is there continuity between the harness side connector
terminal No.C36±2 and ground (No.C±10)?
ÐGo to Step 7Go to Step 6
6Repair an open circuit between terminal No.C36±2 and
ground.
Is the action complete?
ÐÐÐ
7Is the battery voltage applied between the harness side
connector terminal No.C36±2 and No.C36±1?
ÐGo to Step 8Go to Step 9
8Replace the blower motor.
Is the action complete?
ÐVerify repairÐ
9Refer to chart B and C.
Is the action complete?
ÐVerify repairÐ

1A±112
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart B: Fan Does Not Rotate in MAX HI Mode
StepActionValue(s)Ye sNo
1Is the MAX-HI relay (C±35) normal?
ÐGo to Step 2
Replace the
relay
21. Turn on the ignition switch (the engine is run).
2. Set the fan switch to the MAX-HI.
Is there continuity between the harness side connector
terminal No.C36±2 and No.C35±5?
ÐGo to Step 4Go to Step 3
3Repair an open circuit between terminal No.C36±2 and
No.C35±5.
Is the action complete?
ÐGo to Step 3Ð
4Is there continuity between the harness side connector
terminal No.C35±1 and ground (No.C±10)?
ÐGo to Step 6Go to Step 5
5Repair an open circuit between terminal No.C35±1 and
ground (No.C±10).
Is the action complete?
ÐGo to Step 4Ð
6Is the battery voltage applied between the harness side
connector terminal No.C35±2 and ground?
ÐGo to Step 8Go to Step 7
7Repair an open circuit between terminal No.C35±2 and
No.F±7 fuse.
Is the action complete?
ÐGo to Step 6Ð
8Is the battery voltage applied between the harness side
connector terminal No.I19±2 and ground?
ÐGo to Step 10Go to Step 9
9Repair an open circuit between terminal No.C35±4 and
No.I19±2.
Is the action complete?
ÐVerify repairÐ
10Replace the auto air conditioner control unit.
Is the action complete?
ÐVerify repairÐ

1A±116
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
ConditionPossible causeCorrection
Magnetic clutch does not workÐRefer to Chart A
Chart A: Magnetic Clutch Does Not work
StepActionValue(s)Ye sNo
1Is the fuse No.F±7 normal?
ÐGo to Step 2
Replace the
fuse
2Is the relay No.X±2 (compressor relay) No.X±8 (A/C
thermo relay) and No.X±1 (heater relay) normal?
ÐGo to Step 3
Replace the
relay
3Is there continuity between the pressure switch side
connector terminal No.C21±1 and No.C21±2?
ÐGo to Step 5Go to Step 4
4Pressure switch defective or refrigerant pressure
improper.
Pressure switch replaced or refrigerant pressure
adjusted?
ÐGo to Step 3Ð
51. Turn the ignition switch on. (the engine is run.)
2. Turn the air conditioner switch on.
Is the battery voltage applied between the harness side
connector terminal No.E2±1 and the ground?
ÐGo to Step 7Go to Step 6
6Magnetic clutch defective or earth defective.
Magnetic clutch replaced or earth replaced?
ÐGo to Step 5Ð
7Is there continuity between the harness side connector
terminal No.X2±1 and No.E2±1?
ÐGo to Step 9Go to Step 8
8Repair an open circuit between terminal No.X2±1 and
No.E2±1.
Is the action complete?
ÐGo to Step 7Ð
9Is the battery voltage applied between the harness side
connector terminal No.X2±5 and ground, No.X2±2 and
ground?
ÐGo to Step 11Go to Step 10
10Repair an open circuit between terminal No.X2±5 and
fuse No.F±7, No.X2±2 and fuse No.F±7.
Is the action complete?
ÐGo to Step 9Ð
11Is the battery voltage applied between the harness side
connector terminal No.I20±18 and ground?
ÐGo to Step 13Go to Step 12
12Repair an open circuit between terminal No.I20±18 and
No.X2±4.
Is the action complete?
ÐGo to Step 11Ð
13Is the battery voltage applied between the harness side
connector terminal No.C21±2 and ground?
ÐGo to Step 15Go to Step 14
14Repair an open circuit between terminal No.C21±2 and
fuse No.F±7.
Is the action complete?
ÐGo to Step 13Ð
15Is the battery voltage applied between the harness side
connector terminal No.X8±5 and ground, No.X8±2 and
ground?
ÐGo to Step 17Go to Step 16
16Repair an open circuit between terminal No.X8±5 and
No.C21±1, No.X8±2 and fuse No.F±7.
Is the action complete?
ÐGo to Step 15Ð

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

3F±28INTELLIGENT SUSPENSION
DTC9 Control Unit Abnormality
Replace the control unit.
DTC9±1 Control Unit Blown Fuse for FR Actuator
StepActionValue(s)Ye sNo
11. Turn off the starter switch.
2. Disconnect the actuator connector C±9.
3. Measure the resistance between the actuator side
connector C±9 terminals 1 and 2.
Is the resistance within the specified value?
6.4± 7.2
Go to Step 2Go to Step 3
21. Measure the resistance between the actuator side
connector C±9 terminals 3 and 4.
Is the resistance within the specified value?
6.4± 7.2
Go to Step 4Go to Step 3
3Replace the actuator FR.
ÐGo to Step 7Ð
41. If all steps are correct, check the continuity between
the control unit connector C±46 terminal 1 and
connector-terminal C46±4, C46±17, C46±5,
C46±18.
Is there continuity?
ÐGo to Step 5Go to Step 6
5Repair the circuit.
ÐGo to Step 7Ð
6Replace the control unit.
ÐGo to Step 7Ð
71. Reconnect all components, ensure all components
are properly mounted.
2. Clear the DTC.
Was this step finished?
Ð
Go to ªBasic
Diagnosis
FLowº.
Go to Step 7