ISUZU TROOPER 1998 Service Repair Manual

AIR CONDITIONING 1B Ð 55
25 (2.5/18)
25 (2.5/18)
25 (2.5/18)
25 (2.5/18)
15 (1.5/11)
15 (1.5/11)
15 (1.5/11)
15 (1.5/11)
15 (1.5/11)
TORQUE SPECIFICATIONS (ROOF DUCT TYPE)
Nám (kgám/ibáft)
E06RY00002

1B Ð 56 AIR CONDITIONING
DIAGNOSIS
Rear Air Conditioning Cycle Diagnosis
Condition Possible Cause Correction
No cooling or insufficient cooling
Insufficient velocity of cooling airFront air conditioner not switched
on.
Other
Clogged filter
OtherSwitch front A/C switch ON.
See front air conditioner
workshop manual.
Clean or replace cooling unit filter.
See front air conditioner
workshop manual.

AIR CONDITIONING 1B Ð 57
FAN CONTROL SWITCH
Inspection
Using an electric circuit tester, check continuity between
terminals.
If not as specified, replace the switch.
1234
OFF
LOW
MEDIUM
HIGH
Fan control switch
OFF
L 0.5 LG
0.85 Y
0.85 RG 0.85 B
M
H1
2
3
4
Resistor
0.5½1.1½
Mo MH ML
0.5 LG(ML)
0.85 WR(Mo)0.85 RG(MH)
RESISTOR
Inspection
Using an electric circuit tester, check the resistance
between the terminals specified below.
If the resistances are not as specified, replace the resistor.
Terminal Resistance (½)
Mo ~ MH 0.5
Mo ~ ML 1.6
825RY00058
826RY00016

1B Ð 58 AIR CONDITIONING
COOLING UNIT
Main Components
2
3
1
Legend
(1) Evaporator Assembly
(2) Expansion Valve
(3) Fan Motor
872RY00001

AIR CONDITIONING 1B Ð 59
FAN MOTOR
Inspection
1. Disconnect the fan motor connector from the A/C
harness.
2. Connect the batteryÕs positive terminal to the No.5
terminal of the fan motor and the negative terminal to
the No.4 terminal.
3. Check that the fan motor operates correctly.
Fan motor connector
0.85 B (-) 4
0.85 R (+) 5
872RY00002

1BÐ60 AIR CONDITIONING




















;&9&-
"650
"$0
'
'"650-0)
*
1
13
10
9
7
6
5
8 11122
4 3
FULL AUTOMATIC AIR CONDITIONING SYSTEM
GENERAL DESCRIPTION
Using a variety of sensors, this full automatic heater and air conditioner accurately senses outside air
temperature, solar radiation quantity, evaporatorÕs blowing temperature, heater core coolant temperature
and interior temperature, then enters these data to the automatic heater/air conditioner control unit
(equipped with the built-in micro-computer). The data provided to the control unit enables to automatically
control blow temperature and blow air quantity, turn on or off the compressor and switch the blow port as
well as switching between the fresh air intake and interior air circulation.
Resetting the automatic function allows you to switch to the manual control mode.
The self-diagnosis function of the automatic heater and air conditioner control unit (with the built-in micro-
computer) allows the unit to access and diagnose a failed part easier and quicker.
Full Automatic Air Conditioner Parts Configuration
865RY0004
Legend
(1) Lower Center Vent Box
(2) Sun Sensor
(3) Mix Actuator
(4) Mode Actuator
(5) Heater Unit
(6) In Car Sensor(7) Pollen Filter
(8) Automatic Air Conditioner Control Unit
(9) Max-High Relay
(10) Blower Unit
(11) Intake Actuator
(12) Duct Sensor
(13) Evaporator Assembly
This illustration is based on RHD

AIR CONDITIONING 1BÐ61
MEMO

1BÐ62 AIR CONDITIONING
CIRCUIT DIAGRAM
6VE1 (RHD)
B-5
BLOWER
MOTOR2
B-5
1
I-51
3I-51
I-51I-51
MAX HI
RELAY POWER
TRANSISTORI-50
I-50
4
H-202
H-26
10
1
3
H-20
121 2L/B
0.5P/G
12
I-32
16 I-32
P-2
0.85W/G5W
5W 0.5R/W
0.3B0.5R/W 0.3R/W
TAIL RELAY(4) ILLUMINATION
CONTROLLER0.5G/R 0.85G/R
1.25B
1.25B1.25B
0.5B
9 I-32 5W 3W
BATT
FL-1
80A
MAIN4B-36
33L/R
C-19 25A
BLOWERC-20 10A
AIR CON
3L 2L/B
0.3BR
0.5BR0.3BR 2/B 0.3GR
0.3GR/L0.5L/B
2/B
B-36
20
H-27 2
B-36H-14
1
B-36HEATER & A/C RELAY
STARTER RELAY(1)
H-141
H-1310
I-328
H-269
10 C-16
10A CLOCK ROOM
BODY-RHBODY-LH
B-18
B-19
B-1
AUTO A/C CONTROL UNITAUTO A/C CONTROL UNIT
I-3217
14 35 2112 337
I-32
22
29 6I-331 H-20
14
H-16
M
192B
I-33
2I-50
D08RY00118

AIR CONDITIONING 1BÐ63
E-19
A/C TEHRMO
RELAY
THERMO
UNITPRESSURE
SW
I-3214I-334I-3318I-3211
AUTO A/C CONTROL UNIT
H-1616
H-241
H-611
H-1617
H-416
0.5P/G 0.5Y/B 0.5Y/B
0.5P/G
0.5G/O
1.25B
0.5G/O
0.5G/B
0.5G/B
0.5BR/Y 0.5BR/Y 0.5BR/Y 0.3G/B
0.5L/O
0.5L/W
0.3L/R
0.3L/Y
0.3BR/B0.5B 1.25B0.5G/B0.5G/W 0.5G/W 0.5G/W 0.5BR0.5LG 0.5BR
0.5BR 0.5RB
0.5BR
0.5BR
0.5BR
0.5BR
0.3B/L 0.3B/L PCM(E15)
PCM(B14)
X - 5
4X - 5
1
X -53 12
H-167
H-2413
X - 52A/C COMPRESSOR
RELAY
MAGNETIC
CLUTCHINTAKE
ACTUATOR
X - 7
4X -7
3
X -71X - 72
H-417
H-69
E-31
1
2 C-25
C-25
H-411
H-51
4
H-51
I-493
I-494 612
M
INCAR
SENSOR
I-341I-344
M
I-495
I-49I-49I-49
2I-34
3I-34
I-3312I-3313I-331I-3314
10 17 18 19 34 13 31 7
H-415
D08RY00293

1BÐ64 AIR CONDITIONING
3
C
HI-45
M
C-862
H-249
1C-86
6I-45
8
H-24
2
9 11 8 23 24 16 6 25 26 1 2 3 4 I-33
0.3LG/B 0.3LG/B 0.3B/L0.3B/L
AMBIENT SENSOR
3
I-336
I-32
0.3V/W0.3LG/W
0.3V/W0.3B/L 0.3B/L
0.3B/L 0.3B/L
0.3B/L
SUN SENSOR
MIX ACTUATOR
I-402I-352
H-678
1I-40
1I-35
4
H-678
I-45
5
I-32
0.3V/R0.3V/R
5H-67
2I-457I-45
15
I-33
0.3V/G0.3V/G 0.3B/L 0.3B/L
6H-67
5
I-33
0.3V0.3V
7H-67
20
I-33
0.3LG/W
DUCT SENSOR
9
VENT B/L FOOT D/F DEFB-694
H-26
M
1B-69
4
I-32
0.3Y/BR 0.3Y/BR
0.3Y/G
0.3GR/G
0.3GR
0.3GR/R 0.3Y/G
0.3GR
0.3GR/R
0.3GR/G 0.3GR/G
0.3B/L 0.3B/L0.3GR/L 0.3GR/L
0.3GR/R
5B-69
3
I-32
4B-693B-69
10
I-33
8B-69
9
I-33
7B-69
8
I-33
2
11 12 18 19 5 1B-696B-69
H-25H-25H-26H-26H-25H-268
H-25
7
I-3311
I-336
I-33
MODE ACTUATOR
AUTO A/C CONTROL UNIT
D08RY00120