ISUZU AXIOM 2002 Service Repair Manual

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±95
STEP 3: Sensor Output Check
865R200035

1A±96
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
STEP 4: Operation Check
865R200032

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±97
Inspection By Failed Location
Inspection of the Sensors
When the self-diagnosis function has determined that
trouble is present on the sensors, check them according
to the following flow chart.
F01RY00005

1A±98
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart 1: In Car Sensor
D08R200029
StepActionValue(s)Ye sNo
1Disconnect the in car sensor connector. (No.I-17)
Is performance of the sensor normal? (Refer to the
later section on ªIndividual Inspectionº)ÐGo to Step 2
Replace the
in car sensor
2Is there continuity between the harness side connector
No.I20±1 and No.I17±3?
ÐGo to Step 4Go to Step 3
3Repair an open circuit between terminal No.I20±1 and
No.I17±3.
Is the action complete?
ÐGo to Step 2Ð
4Is there continuity between the harness side connector
No.I20±11 and No.I17±4?
ÐGo to Step 6Go to Step 5
5Repair an open circuit between terminal No.I20±11 and
No.I17±4.
Is the action complete?
ÐGo to Step 4Ð
6Replace the auto air conditioner control unit.
Is the action complete?
ÐVerify repairÐ

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±99
Chart 2: Ambient Sensor
D08R200030
StepActionValue(s)Ye sNo
1Disconnect ambient sensor connector. (No.C±19)
Is performance of the ambient sensor normal? (Refer
to the
later section on ªIndividual inspectionº)ÐGo to Step 2
Replace the
ambient
sensor
2Connect the ambient sensor connector.
Is resistance between the harness side connector
No.I20±2 and No.I20±11 normal?Refer to the
later section
on ªIndividual
inspectionº
Go to Step 4Go to Step 3
3Repair an open circuit between terminal No.I20±2 and
No.C19±1 or No.I20±11 and No.C19±2.
Is the action complete?
ÐVerify repairÐ
4Replace the auto air conditioner control unit.
Is the action complete?
ÐVerify repairÐ

1A±100
HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
Chart 3: Sun Sensor
D08R200059
StepActionValue(s)Ye sNo
1Disconnect the sun sensor connector. (No.I±15)
Is performance of the sun sensor normal? (Refer to the
later section on individual inspection)ÐGo to Step 2
Replace the
sun sensor.
2Is there continuity between the harness side connector
terminal No.I20±3 and No.I15±2?
ÐGo to Step 4Go to Step 4
3Repair an open circuit between terminal No.I20±3 and
No.I15±2.
Is the action complete?
ÐGo to Step 2Ð
4Is there continuity between the harness side connector
terminal No.I20±11 and No.I15±1?
ÐGo to Step 6Go to Step 5
5Repair an open circuit between terminal No.I20±11 and
I15±1.
Is the action complete?
ÐGo to Step 4Ð
6Replace the auto air conditioner control unit.
Is the action complete?
ÐVerify repairÐ

HEATING, VENTILATION AND AIR CONDITIONING (HVAC)
1A±101
Inspection of the Intake Actuator System
D08R200060

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

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