relay ISUZU TROOPER 1998 Service Owner's Guide

AIR CONDITIONING 1B Ð 7
EVAPORATOR
The evaporator cools and dehumidifies the air
before the air enters the vehicle. High-pressure
liquid refrigerant flows through the expansion valve
(1) into the low-pressure area of the evaporator (2).
The heat in the air passing through the evaporator
core is lost to the cooler surface of the core, thereby
cooling the air.
As heat is lost between the air and the evaporator
core surface, moisture in the vehicle condenses on
the outside surface of the evaporator core and is
drained off as water.
When the evaporator malfunctions, the trouble will
show up as inadequate supply of cool air. The
cause is typically a partially plugged core due to
dirt, or a malfunctioning blower motor.
The evaporator core with a laminate louver fin is a
single-sided tank type where only one tank is
provided under the core.
ELECTRONIC THERMOSTAT
The thermostat consists of the thermosensor (1)
and thermostat unit (4) which functions electrically
to reduce the noises being generated while the
system is in operation.
The electronic thermosensor (1) is mounted at the
evaporator core (2) outlet and senses the
temperature of the cool air from the evaporator (3).
Temperature signals are input to the thermostat
unit. This information is compared by the thermo
unit and the results in output to operate the A/C
Thermostat relay and turn the magnetic clutch
ÒONÓ or ÒOFFÓ to prevent evaporator freeze-up.
A characteristic of the sensor is that the resistance
decreases as the temperature increases and the
resistance increases as the temperature decreases.
REFRIGERANT LINE
Restrictions in the refrigerant line will be indicated by:
1. Suction line; A restricted suction line will cause
low suction pressure at the compressor, low
discharge pressure and little or not cooling.
2. Discharge line; A restriction in the discharge line
generally will cause the discharge line to leak.
3. Liquid line; A liquid line restriction will be
evidenced by low discharge and suction
pressure and insufficient cooling.
Refrigerant flexible hoses that have a low
permeability to refrigerant and moisture are used.
These low permeability hoses have a special nylon
layer on the inside.
SERVICE CHARGE VALVES
The charging hoses have a quick-joint type fitting,
to reduce refrigerant loss during removal and
installation.
12
3
4
Reinforcement layer(Polyester) Resin layer(Nylon)
Internal rubber layer
External rubber layer
1
2
874RY00003874RX022

AIR CONDITIONING 1B Ð 9
852RY00008
This illustration is based on RHD
A/C switch
Drain hose
Suction line (Low-pressure hose)
Discharge line (High-pressure hose)Compressor bracket
Pressure
switch
Receiver/drier
Compressor
Relay
Condenser assembly Drive belt O-ring Suction line
(Low-pressure pipe) Evaporator assembly
Liquid line(High-pressure pipe)
Liquid line
(High-pressure pipe)
4JG2 (R/LHD)

1B Ð 12 AIR CONDITIONING
Legend
(1) Liquid Line (High-Pressure Pipe)
(2) O-ring
(3) Compressor
(4) Discharge line (High-Pressure Hose)
(5) Pressure Switch
(6) Receiver Drier(7) Condenser Assembly
(8) Serpentine Belt
(9) Relay
(10) Drain Hose
(11) Suction Line (Low-pressure Hose)
(12) Evaporator Assembly
(13) A/C Switch
12
13
4
2
3
5
6
7
8
911
10
1
Delphi Harrison (LHDáV6)
852RW009

1BÐ60 AIR CONDITIONING




















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"650
"$0
'
'"650-0)
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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

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

1BÐ66 AIR CONDITIONING
6VE1 (LHD)
0.5R/G
ILLUMINATION
CONTROLLER
12
I-32
157
I-32
16 I-3229
P-2
0.85W/R5W
3L 2L/B 2L/BBATT.
5W 0.5R/W
0.3B0.5R/W 0.3R/W
TAIL REAY(4) 0.5G/R 0.85R/W
1.25B
1.25B
0.5B
9 I-3236 5W 3W FL-1
80A
MAIN4
B-36
33L/RC-20 10A
AIR CON
C-19 25A
BLOWER
BLOWER
MOTOR
B-36 2
B-36H-14
1
B-36HEATER A/C RELAY
STARTER SW (ACC)
H-141
I-328
H-265
10 C-16 10A
CLOCK ROOM
C-11 10A
AUDIO
F-12 10A
TAIL-RH
BODY-LHB-19
BODY-RHB-22BH-481.25B 15
H-2614
I-50 2
AUTO A/C CONTORL UNIT AUTO A/C CONTORL UNIT
I-32
6
H-16
0.5BR 2B 2B0.3GR/W0.5L/B
0.3BR 0.3BR
19
I-33
33
22 21 3512
H-48
0.3GR/L
MAX HI
RELAY POWER
TRANSISTOR
I-51
3
H-4811
I-51
4I-50
3
I-512I-501
H-4815
I-511
B-51
B-5
2
H-484
M
17
I-33
14
D08RY00121

AIR CONDITIONING 1BÐ67
A/C THERMO
RELAY THERMO
SENSORPURESSURE
SW
I-3214I-334I-3318I-3211
ATUO A/C CONTROL UNIT
H-1621
H-91
H-1611
E-19
H-1619H-416
0.5P/G 0.5Y/B 0.5Y/B 0.5Y/B
0.5P/G
0.5G/O 0.5G/O
0.5G/B
0.5G/B
0.5BR/Y 0.5BR/Y 0.5BR/Y 0.3G/B
0.5L/O
0.3L/W
0.3L/R
0.3L/Y
0.3BR/B 1.25B0.3G/B0.5G/W 0.5G/W
0.5G/W0.5BR 0.5LG 0.5BR
0.5BR 0.5BR
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-1617
H-919
H-514
X - 52
A/C
COMPRESSOR
RELAY
MAGNETIC
CLUTCHINTAKE
ACTUATOR
X - 7
4X -7
3
X -71X - 72
H-417
H-69
E-31
1
2C-25
C-25
H-411
H-51
I-493
I-494 612
M
IN CAR
SENSOR
I-341I-344
M
I-495
I-49I-49I-49
2I-34
3I-34
I-3312I-3313I-331I-33
31 71334
1.25B19 18 101714
H-415
D08RY00122

1BÐ70 AIR CONDITIONING
4JX1 (RHD)
X-2124
13X-21
X-21THERMO SW RELAY
0.5BR 0.5BR
0.5G/Y
QWS THERMO SW 0.5G/BX-21
B-19
B-18
BODY-RH
BODY-RH
I-32 I-33I-32 I-32 I-33 I-3384I-329I-32107111213
12
B-36 B-36
B-36 B-3634
9
H-26
5W 3W
5W
3L/R
C-16
CLOCK, ROOM
BODY ENG. FRAME10A
0.5Y/B 0.5Y/B 0.5Y/B
0.5R/G
0.5G/R 0.5G/RILLUMINATION
CONTROLLER
TAIL RELAY (4) 0.5R/W 0.3R/W0.5R/W 0.5R/W
0.5BR 0.5BR
0.5BR
HEATER
& A/C RELAY CHARGE
RELAY(1)
P-1
P-5
P-2
P-7P-10P-6
5B30B8B
8B/R
FL-1
80A MAIN
+
”
AUTO A/C CONTROL UNIT
I-32
H-271.25B
0.5B
20
1.25B
I-3314
I-49
4612
M
I-49 I-49 I-49
I-493
5
I-49
16
0.5L/O
0.5L/W
0.3L/R
0.3L/Y
0.3B/L
1.25B0.3B
0.5BR
C-25C-25
2 1
H-26160.5G/W 0.5LGPRESSURE SW
INTAKE
ACTUATOR
H-141
H-1310
0.85W/G 0.85W/G
5W
0.5B
0.5BR
H-167
3
H-40.5Y/B 0.5Y/B
12
H-17
1
H-24
0.5BR
3W/LFL-3
40A C/HEAT
2H-410.5G/Y
ECM(J1-23)
H-2413
5
H-41
E-23THERMO UNIT
12
I-32
3L
2L/B 2L/B
C-19 25A
BLOWER
BLOWER
MOTOR C-20 10A
A/C
I-50 2
2B 2B
0.3GR/W0.5L/B
0.3BR 0.3BR 2L/B 2B
19
I-33
33 22 34 19 18 17 12
0.3GR/LMAX HI RELAY
POWER
TRANSISTOR
I-51
3
H-26
10
I-51
4I-50
3
I-512I-501I-511
B-52
B-5
1
H-20
2
17
I-33
14 35 36 7 21
29
H-201
M
B-1
D08RY00114

AIR CONDITIONING 1BÐ71
AUTO A/C CONTROL UNIT 0.3B/L
0.3G/W 0.3G/W
I-34
2
10 9 8 11 23 24 16 6 25 26 1 2 3 4 32 31 20 133 I-34
M
I-3414
I-34
2
1 C-86
H-24
0.3LG/B
1
2C-86
9
H-24
I-33
1 I-35
3
I-33
0.3BR/B0.5B
0.3LG/B
8I-3520.3LG/W0.3B/L
0.3B/L
20
0.3LG/W
I-33
0.3B/L
M
6
6
I-32 I-45
H-674
I-453
H-678
2
15
I-33
H-676
8
5
I-32
H-675
7
5
I-33
H-677
I-45 I-45 I-45
0.3V/W
0.3V/R
0.3V/G
0.3V 0.3V/W
0.3V/R
0.3V/G
0.3V
M
1
4 B-69
H-2511
9
45
3
H-2512
3
10
H-2618
0.3Y/BR
0.3Y/G
0.3GR
I-32 I-32I-33
0.3Y/BR
0.3Y/G
0.3GR
B-69 B-69 B-69B-69
VENT FOOT DEFB/L D/F
4
H-26
1118
I-33 I-33 1
X-1224
13X-12
X-12
X-524
13 X-5
X-5 X-5
0.5BR
11
H-410.5G/W
0.5G/O
0.5P/G
2 7
H-6H-414
H-17E-27 0.5G/O 0.5G/O
A/C THERMO
RELAY
0.5G/O ECM(J1-31)
INCAR SENSOR
AMBIENT SENSOR
SUN SENSOR
DUCT SENSOR
MIX
ACTUATORMODE
ACTUATOR
I-33
8 B-692 76 B-69 B-69 B-69
14
I-32
MAGNETIC
CLUTCH
I-401 I-40
9
H-2619
0.3GR/R
I-33
0.3GR/R
8
H-255
0.3GR/G
I-33
0.3GR/G
7
H-261
0.3GR/L
I-33
0.3GR/L
0.3GR/R
0.3B/L 0.3B/L 0.3B/L
0.3G/B0.3GR/G
0.5P/G
0.5P/G16
H-16
CERAMIC
HEATER RELAYCERAMIC
HEATER
DIODE
13
I-32
B-1 3W/L
0.5G/B
1
B-442
B-44 0.5Y/G 0.5Y/G11
H-150.3G/W
1
B-482
B-48 3W/G15
H-133W/G 2B
BODY-LH
X-12
2
6
H-16
H-1617
H-254
D08RY00115