2002 ISUZU AXIOM Service Repair Manual

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

1A±104
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Inspection of the Mix Actuator System
D08R200032
ConditionPossible causeCorrection
Does not work at allÐRefer to Chart A
Control failureÐRefer to Chart B

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±105
Chart A: Does Not work At All
StepActionValue(s)Ye sNo
11. Turn on the ignition switch (the engine is run).
2. Disconnect the mix actuator connector (C±43).
3. Short-circuit the chassis harness side connector
terminal No.C43±3 and No.C43±7.
4. Using the temperature control switch, select 18
C
(65
F) for the temperature.
Is the battery voltage applied on a regular interval basis
between the harness side connector terminal
No.C43±6 (-) and No.C43±8 (+)?
ÐGo to Step 3Go to Step 2
2Replace the auto air conditioner control unit.
ÐVarify repairÐ
3Using the temperature control switch, select 32
C
(90
F) for the temperature.
Is the battery voltage applied on a regular interval basis
between the harness side connector terminal
No.C43±6 (+) and No.C43±8 (-)?
ÐGo to Step 5Go to Step 4
4Replace the auto air conditioner control unit.
ÐVerify repairÐ
5Is there continuity between the harness side connector
terminal No.I19±6 and No.C43±6?
ÐGo to Step 7Go to Step 6
6Repair an open circuit between terminal No.I19±6 and
No.C43±6.
Is the action complete?
ÐGo to Step 5Ð
7
Is there continuity between the harness side connector
terminal No.I19±5 and No.C43±8?
ÐGo to Step 9Go to Step 8
8Repair an open circuit between terminal No.I19±5 and
No.C43±8.
Is the action complete?
ÐVerify repairÐ
9Replace the mix actuator.
Is the action complete?
ÐVerify repairÐ

1A±106
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart B: Mix Actuator Control Failure
StepActionValue(s)Ye sNo
1Turn the ignition switch (the engine is run).
Dose the mix actuator fully stroke when 32
C (90
F)
and 18
C (65
F) of the temperature control switch?
ÐGo to Step 3Go to Step 2
2Repair or replace the air mix door or the link unit.
Is the action complete?
ÐVarify repairÐ
3Is there continuity between the harness side connector
terminal No.C43±3 and No.I20±11?
ÐGo to Step 5Go to Step 4
4Repair an open circuit between terminal No.C43±3 and
No.I20±11.
Is the action complete?
ÐGo to Step 3Ð
5Is there continuity between harness side connector
terminal No.C43±7 and No.I20±5?
ÐGo to Step 7Go to Step 6
6Repair an open circuit between terminal No.C43±7 and
No.I20±5.
Is the action complete?
ÐGo to Step 5Ð
7Is there continuity between the harness side connector
terminal No.C43±2 and No.I20±15?
ÐGo to Step 9Go to Step 8
8Repair an open circuit between terminal No.C43±2 and
No.I20±15.
Is the action complete?
ÐGo to Step 7Ð
9Is sum of the voltage between the following chassis
harness side connector terminals approximately 5V?
No.I20±15 and No.I20±5, No.I20±5 and No.I20±11
ÐGo to Step 11Go to Step 10
10Replace the actuator.
Is the action complete?
ÐVerify repairÐ
11Replace the auto air conditioner control unit.
Is the action complete?
ÐVerify repairÐ

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±107
Inspection of the Mode Actuator System
D08R200035
ConditionPossible causeCorrection
Does not work at allÐRefer to Chart A
Control failureÐRefer to Chart B

1A±108
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart A: Does Not Work At All
StepActionValue(s)Ye sNo
11. Turn on the ignition switch (the engine is run).
2. Disconnect the mode actuator connector (C±42)
3. Select VENT pressing the mode actuator.
Is the battery voltage provided on a regular interval
between the harness side connector terminal
No.C42±1 (+) and No.C42±5 (-)?
ÐGo to Step 3Go to Step 2
2Replace the auto air conditioner control unit.
Is the action complete?
ÐVarify repairÐ
3Turn on the DEF mode switch.
Is the battery voltage provided on a regular interval
between the chassis side connector terminal
No.C42±5 (+) and No.C42±1 (-)?
ÐGo to Step 5Go to Step 4
4Replace the auto air conditioner control unit.
ÐVarify repairÐ
5Is there continuity between the harness side connector
terminal No.C42±1 and No.I19±4?
ÐGo to Step 7Go to Step 6
6Repair an open circuit between terminal No.C42±1 and
No.I19±4.
Is the action complete?
ÐGo to Step 5Ð
7Is there continuity between the harness side connector
terminal No.C42±5 and No.I19±3?
ÐGo to Step 9Go to Step 8
8Repair an open circuit between terminal No.C42±5 and
No.I19±3.
Is the action complete?
ÐVerify repairÐ
9Replace the mode actuator.
ÐVerify repairÐ

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±109
Chart B: Mode Actuator Control Failure
StepActionValue(s)Ye sNo
1Turn on the ignition switch (the engine is run).
Dose the mode actuator fully stroke when the defrost
mode and the vent mode are selected?
ÐGo to Step 3Go to Step 2
2Repair or replace the mode door or the link unit.
Is the action complete?
ÐGo to Step 1Ð
3Is there continuity between the harness side connector
terminal No.C42±9 and No.I20±11?
ÐGo to Step 5Go to Step 4
4Repair an open circuit between terminal No.C42±9 and
No.I20±11.
Is the action complete?
ÐGo to Step 3Ð
5Is there continuity between the harness side connector
terminal No.C42±3 and No.I20±10?
ÐGo to Step 7Go to Step 6
6Repair an open circuit between terminal No.C42±3 and
No.I20±10.
Is the action complete?
ÐGo to Step 5Ð
7Is there continuity between harness side connector
terminal No.C42±4 and No.I20±8?
ÐGo to Step 9Go to Step 8
8Repair an open circuit between terminal No.C42±4 and
No.I20±8.
Is the action complete?
ÐGo to Step 7Ð
9Is sum of the voltage between the following harness
side connector terminal approximately 5V? Voltage
between No.I20±8 and No.I20±10 plus voltage
between No.I20±8 and No.I20±11
5VGo to Step 11Go to Step 10
10Replace the actuator.
Is the action complete?
ÐVerify repairÐ
11Dose the mode actuator work normally through manual
operation?
ÐGo to Step 13Go to Step 12
12Replace the sensor.
Is the action complete?
ÐVerify repairÐ
13Replace the auto air conditioner control unit.
Is the action complete?
ÐVerify repairÐ

1A±110
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Inspection of the Fan Motor System
D08R200058