1998 ISUZU TROOPER sensor

AIR CONDITIONING 1BÐ109
Chart B: Mix Actuator Control Failure
NOReplace the actuator.
NOThe harness is disconnected.
NO
NOMix actuator control failure due to the
failed sensor.
YES YES
YES
YES
Turn on the ignition switch (the engine is
started).
Replace the automatic heater/air conditioner
control unit.
Is conduction provided between the
following chassis harness side
connector terminals?
No.3 and No.11 .
No.7 and No.5 .
No.2 and No.15 .
I-33I-45
I-33I-45
I-33I-45
Is sum of the voltages between the
following chassis harness side connector
terminals approximately 5V?
Voltage between No.15 and No.5
plus voltage between No.5
and No.11 .
I-33
I-33I-33
I-33
Does the self-diagnosis function (the
current trouble display) indicate failure
on the mix actuator potentiometer?
Is full stroke of the air mix door available
when you selected FH or FC using the
temperature control lever?Failure on the air mix door or the link
unit.

1BÐ112 AIR CONDITIONING
Chart B: Mode Actuator Control Failure
NOThe harness is disconnected.
NOReplace the actuator.
NOFailure on the mode door or the link unit.
YESMode control failure due to the failed
sensor.
NO YES
YES
YES
Turn on the ignition switch (the engine is
started).
Replace the automatic heater/air conditioner
control unit.
Is conduction provided between the
following chassis harness side
connector terminals?
No.9 and No.11 .
No.3 and No.10 .
No.4 and No.8 .
I-33B-69
I-33B-69
I-33B-69
Is sum of the voltages between the
following chassis harness side connector
terminals approximately 5V?
Voltage between No.15 and No.1
plus voltage between No.15
and No.11 .
I-33
I-32I-32
I-32
Does the mode work normally through
manual operation?
Is full stroke available from the mode
door when the defrost mode and vent
mode are selected?

1BÐ118 AIR CONDITIONING
Inspection of the Magnet Clutch System
6VE1 Engine
I-32
C-1C-3I-33
E-3E-19
12345678
9 10111213141516
1
112
123
134
145
156
167
178
189
1910
20
B-19C-25
A 2
B-361
H-14
C-19
25A
BLOWER
MOTOR
C-20
10A
A/C FL-1
80A
MAIN
Heater
Relay
1B-3610
H-13
0.3
B 0.85
W/G0.85
W/R
3.0
W
3.0
L/R
0.5
BR
1.25
B
B-19
BODY-LH3
B-36
4B-36
BATT.(+)
Blower
MotorIntake
Actuator STARTER
RELAY(1)
0.5
LG 0.5
BR0.5
BR
0.5
G/W
0.5
P/G0.5
P/G0.5
G/O
0.5
G/O
PCM
(C3-E15)
31 13
COMP-F/B 70.5
BR
0.5
BR/Y 0.3
G/B0.5
G/B0.5
BR/Y 0.5
BR
Triple
Pressure
Switch
0.5
BR
A
A/C
Thermo Relay
Auto A/C Control Unit
3X-5
16
H-1617H-16
14
I-3218I-33
1X-5
13H-24
12
H-41
2 1
C-25
C-25
4X-5X-5 2
X-57
H-16
A/C
Compressor
Relay
Magnetic
clutch
1X-7
3X-74X-72
X-7
PCM
(C-1-B14)
E-39
1
H-67
H-41
5
H-41
Engine
Coolant
Temperature
Sensor
ENGINE COOLANT
TEMPERATURE GAUGE
0.5
Y/B
0.5
Y/B
0.5
Y/B
E-1911
1
H-61
H-24
I-334
B-36X-5X-7
H-14
1
2
1
2
H-16
H-24
H-13
H-6H-41
12
3412111
362
51
4 123
45 610987654321
22212019181514131211171612345111213141567891018192021221617
6H-41
4321
8765
12 11 10 9
16 15 14 13123 4
567 8
9101112
13 14 15 16
17 18 16 15 1478 6 5
12 13 11 10 94 132
5 6 7 8
15 16 17 18 142 3 41
10 11 12 13 9A1 A2 A3 A4 A5 A6 A7 A8 A9A10 A11 A12 A13 A14 A15 A16B1 B2 B3 B4 B5 B6 B7 B8 B9B10 B11 B12 B13 B14 B15 B16E1 E2 E3 E4 E5 E6 E7 E8 E9E10 E11 E12 E13 E14 E15 E16F1 F2 F3 F4 F5 F6 F7 F8 F9F10 F11 F12 F13 F14 F15 F16
D08RY00182

AIR CONDITIONING 1BÐ123
Inspection of the Air Conditioner Room Temperature Setup System
¥ Conflicts Between the Set Temperature and Actual Room Temperature
NOReplace the failed sensor.
NO
NO
Failure on the automatic heater/air
conditioner control unit.
YES YESYES
Is the in car sensor intaking the room
air? (Refer to the later section on "Check
Up".)
Is the air mix link properly attached?
(Make sure that selecting FH or FC using
the lever respectively sets the mix door
to the full hot or full cool.)
Are the interior temperature sensor and
the outside air temperature sensor
functioning normally?
Failure on the in car sensor.
Failure on the air mix link or the actuator.

1BÐ124 AIR CONDITIONING
INDIVIDUAL INSPECTION
In Car Sensor
1. Disconnect the in car sensor connector (I-34).
2. Measure resistance between the in car sensor
side terminal No.3 and No.4 .Sun Sensor
1. Disconnect the sun sensor connector (I-35).
2. Measure the current value on the sun sensor
when placed it approximately 15 cm away from
60W incandescent lamp.
Ambient Sensor
1. Disconnect the connector (C-86) on the ambient
sensor.
2. Measure resistance between the ambient
sensor side terminals. I-34
I-34
Temperature on the Sensor
Temperature Detector(¡C)
Sensor Resistance
Value(k½)














"650
4321
-20 0 5 10 15 20
25 30
-10 0 10 20 30 40
17.09
9.93
3.75
2.24
6.0
1.6 30.69
865RX007
½
0
10 0 -10 -20 30 4020 5 10 15 20 25 30
Temperature on the Sensor
Temperature Detector(¡C)
Sensor Resistance
Value(k½)
17.09 30.69
9.93
6.0
3.75
2.24
1.6
C01RX012
Ð Testing rod12
A
Current
value
40µA or more
+
12
21
D06RY00001

AIR CONDITIONING 1BÐ125
Power Transistor
1. Remove the power transistor connector (I-47)
from the evaporator assembly.
2. Check the conduction between the power
transistor side terminals.
MAX HI Relay
1. Remove the MAX HI relay connector (B-64) from
the blower assembly.
2. Check the conduction between the MAX HI relay
side terminals.In Car Sensor
1. Turn on the ignition switch (the engine is
started). Start the air conditioner in "Full Auto".
2. Make sure that the in car sensor suctions
cigarette smokes and such.
3. Dismount the in car sensor from the automatic
heater/air conditioner control unit. Connect (+)
end and (-) end of the battery to the aspirator
motor side terminals No.1 and No.2
, respectively, then
check if the motor runs normally.I-34
I-34














"650
4321
C01RW020
43
3 41
2 21
No continuity between terminals (2) and (4).
Continuity between terminal (2) and (4) when battery
voltage is applied between (1) and (3).
C01RY00003
1
2
3
Terminal
No.Conduction
Conducted (50½ maximum)
Conducted (100½ maximum)
Conducted (220½ maximum) Not conducted
Not conducted 1
µ23
Testing
rod
µ
µ
µ
µ
´
´
´
´
´
1 23
C01RY00002

AIR CONDITIONING 1BÐ127
In Car Sensor
Legend
(1) In Car Sensor
(2) Automatic Heater / Air Conditioner Control
Unit
Removal
1. Disconnect the battery ground cable.
2. Remove the automatic heater / air conditioner
control unit.
·Refer to the automatic heater / air conditioner
control unit section.
3. Remove in car sensor.
Installation
To install, follow the removal step in the reverse
order.
Ambient Sensor
Legend
(1) Ambient Sensor
(2) Sensor Connector
(3) Radiator Grill
Removal
1. Disconnect the battery ground cable.
2. Remove radiator grille.
·Refer to Radiator Grille in Body Structure
section.
3. Disconnect the ambient sensor connector.
4. Remove the ambient sensor.
Installation
To install, follow the removal step in the reverse
order.


;&9&-
"650
"$0''"
650-0)*
21
865RY00006
12
3
875RY00001

1BÐ128 AIR CONDITIONING
Sun Sensor
Legend
(1) Sun Sensor
Removal
1. Disconnect the battery ground cable.
2. Remove the sun sensor.
3. Disconnect the sun sensor connector.
Installation
To install, follow the removal step in the reverse
order.
Electronic Thermostat
Legend
(1) Duct Sensor
(2) Thermostat Assembly
(3) Evaporator Assembly
Removal
1. Disconnect the battery ground cable.
2. Remove evaporator assembly.
·Refer to Evaporator Assembly section.
3. Remove electronic thermostat.
Installation
To install, follow the removal step in the reverse
order.
1
826RY00001
1
3
2
874RY00002
This illustration is based on RHD This illustration is based on RHD