lock ISUZU TROOPER 1998 Service Owner's Manual

AIR CONDITIONING 1B Ð 19
·Direct charging with a manifold gauge charging station
method
Handling the charging valve handle when installing
refrigerant container.
1) Before attaching the charge valve to the refrigerant
container, turn the charge valve handle
counterclockwise until the needle is fully retracted.
2) Turn the plate nut counterclockwise until it reaches its
highest position relative to the charge valve.
3) Install the charge valve onto the refrigerant container.
4) Turn the plate nut clockwise and connect the center
hose of the manifold gauge to the charge valve.
5) Tighten the plate nut sufficiently by hand. Then turn
the charge valve handle clockwise to lower the needle
and bore a hole in the refrigerant container.
6) Turn the charge valve handle counterclockwise to
raise the needle. The refrigerant in the refrigerant
container is charged into the air conditioning system
by the operation of the manifold gauge.
·Be absolutely sure not to reuse the emptied
refrigerant container.Charge valve handle
Plate nut
Needle Connection

Refrigerant container
Charging hose Manifold gauge
Vacuum pump
Refrigerant container
Charge valve handle
(Low side) (High side)

1B Ð 20 AIR CONDITIONING
1) Make sure the evacuation process is correctly
completed.
2) Connect the center-hose of the manifold gauge to the
refrigerant container.
·Turn the charge valve handle counterclockwise to
purge the charging line and purge any air existing
in the center-hose of the manifold gauge.
3) Open the low-pressure hand valve and charge the
refrigerant about 200 g(0.44 lbs.).
·Make sure the high-pressure hand valve is closed.
·Avoid charging the refrigerant by turning the
refrigerant container upside down.
4) Close the low-pressure hand valve of the manifold
gauge.
·Check to ensure that the degree of pressure does
not charge.
5) Check the refrigerant leaks by using a HFC-134a leak
detector.
·If a leak occurs, repair the leak connection, and
start all over again from the first step of
evacuation.
6) If no leaks are found, open the low-pressure hand
valve of the manifold gauge.Then continue charging
refrigerant to the system.
·When charging the system becomes difficult:
(1) Run the engine at Idling and close the all
vehicle doors.
(2) A/C switch is ÒONÓ.
(3) Set the fan control knob (fan switch) to its
highest position.
WARNING
BE ABSOLUTELY SURE NOT TO OPEN THE HIGH-
PRESSURE HAND VALVE. SHOULD THE HIGH-
PRESSURE HAND VALVE BE OPENED, THE HIGH-
PRESSURE REFRIGERANT GAS WOULD FLOW
BACKWARD, AND THIS MAY CAUSE THE
REFRIGERANT CONTAINER TO BURST.
7) When the refrigerant container is emptied, use the
following procedure to replace it with a new
refrigerant container.
(1) Close the low pressure hand valve.
(2) Raise the needle upward and remove the charge
valve.
(3) Reinstall the charge valve to the new refrigerant
container.
(4) Purge any air existing in the center hose of the
manifold gauge.

1B Ð 48 AIR CONDITIONING
1
2
3
Removal Steps
1. Control lever assembly
2. A/C switch
3. Illumination bulb
Installation Steps
To install, follow the removal steps in the
reverse order.
A/C SWITCH AND ILLUMINATION BULB
REMOVAL
Preparation:
Disconnect the battery ground cable
1. Control Lever Assembly
Refer to Section 1A ÒCONTROL LEVER ASSEMBLYÓ
removal procedure.
2. A/C Switch
Raise up the catch portion of the switch and remove
the switch while pushing it toward the outside.
3. Illumination Bulb
Turn the illumination bulb counterclockwise to
remove.
Catch portion
End of switch A/C switch
INSTALLATION
To install, follow the removal steps in the reverse order.

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

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

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

1BÐ72 AIR CONDITIONING
4JX1 (LHD)
X-2124
13X-21
X-21 THERMO SW RELAY
0.5BR 0.5BR
0.5G/Y
QWS
5)&3.0
48 0.5G/BX-21
B-2BODY-RH
B-19 BODY-LH
I-32 I-33I-32 I-32 I-33 I-33847111213
12
B-36 B-36
B-36 B-3634
7
H-26
5W 3W
5W
3L/R
C-16
CLOCK, ROOM
10AC-19
25A
BLOWERC-20
10A A/C
0.5Y/B 0.5Y/B 0.5Y/B0.5R/W 0.3R/W0.5R/W 0.5R/W
0.5BR
0.5BR0.5L/B
0.3GR/W
2B
0.3GR/L
0.5BR
HEATER AND
A/C RELAY STARTER
SW (ACC)
P-1
P-5
P-2
P-7P-10P-6
5B
2L/B30B8B
8B/R
FL-1
80A MAIN
+
”
I-32
H-481.25B
0.5B
151.25B
I-33
7 21 14 12 2233 34 19 18 1714
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-25
I-3317I-3319
H-9
3L 2L/B
0.3BR 0.3BR
0.5BR
0.5BR
C-25
2 1 19
0.5G/W 0.5LGPRESSURE SW
INTAKE
ACTUATOR
MAX
HI
RELAY ELECTRONIC
THERMOSTAT
THERMO UNIT
H-141
I-502 0.5O/G
5W
0.3B
BODY ENG FRAME
H-167
3
H-4
E-23
1
H-9
ENGINE
0.5BR
3W/LFL-3
40A C/HEATER
2H-420.5G/Y
ECM(J1-23)
12
H-17
B-51
H-2614
I-501
B-5
2
I-50
3
15
H-48
4
H-48
MBLOWER
MOTOR
I-51
2
I-511
43I-51
I-51
AUTO A/C CONTROL UNIT
I-3212
11
H-48
D08RY00116

AIR CONDITIONING 1BÐ75
FULL AUTO display
INTAKE indication
(LED)
(switching between
fresh and interior air)
MODE indication
(LED) (Blow port)
AC display (LED)
FAN indication (LED)
FAN KNOB
AUTO SET
REC FRESH SWITCH
TEMP LEVER
(temperature control)
MODE SWITCH
(blow port selection)
AC SWITCH
IN CAR SENSOR
AMBIENT SENSOR
SUN SENSOR
DUCT SENSOR
MIX ACTUATOR
POTENTIOMETER
MODE ACTUATOR
POTENTIOMETER
AIR MIX DOOR
MODE DOOR
INTAKE ACTUATOR
RECINTAKE DOOR
FAN MOTORPOWER
TRANSISTOR
AUTOMATIC HEATER/AIR CONDITIONER CONTROL UNIT (with the built-in micro-computer)
MAX HI RELAY
PRESSURE
SWITCHAIR CONDITIONER
THERMO RELAY
COMPRESSOR
SWITCH MAGNET
CLUTCH
PCM
PRESSURE
SWITCHAIR CONDITIONER
THERMO RELAYMAGNET
CLUTCH
(4JX1engine)
MIX FRESH
FULL AUTOMATIC AIR CONDITIONER BLOCK DIAGRAM
F01RY00009

AIR CONDITIONING 1BÐ83

¥ The Auto LED maintains unaffected.
¥ Currently selected intake port is
indicated.
5. Fan Switch
(1) Sets the fan to the specified mode.
(2) Even when the fan switch is turned off, status display for the Model and Intake is maintained.
6. Temperature Control Knob
(1) This knob is operable only when the fan is turned on. It may be used for the MAX control of each
block except the fan.
(2) When the manual mode is selected for the fan control, this manual mode is maintained.

*1: In the A/C: OFF mode, FRESH shall be selected.
*2: The ON mode is available only when ON is selected for the fan as well as for the cold outside air
ON/OFF selection.
*3: When the MAX control is selected from the DEF mode, this DEF mode shall be maintained.
Example 1:
Example 2:

¥ As long as the MAX control is selected, the immediately preceding indication shall be maintained for
the AUTO.
¥ Status display is provided for others.
7. Air Conditioning Switch
Pressing this switch turns on or off the A/C (air conditioning) control. (The compressor remains turned
off if the fan is turned off and also the compressor has been turned off because of the given outside air
temperature level.)

(1) The A/C LED remains turned on even if the compressor has been turned off because of the given
outside air temperature level. In this case, however, the AUTO or DEF switch must be turned on and
the A/C ON mode must also be turned on (by the MAX/C mode).
(2) Pressing the A/C switch from the above state (1) turns off the A/C LED.

REC
MIX
FRE

On
Off
Selects MAX/COOL(1): Mode
Manual B/LVENT
Resets MAX/COOLReturns to (1) status.
Mode: Manual B/L
Selects MAX/COOL(1): Mode
Manual B/LVENT
Resets MAX/COOLReturns to (1) status.
Mode: Manual B/L
Mix Fan Mode Intake A/C
MAX/COOL Full cool MAX/HI VENT REC*1 ON mode*2
MAX/HEAT Full hot AUTO/HI FOOT*3 FRESHCurrent status
is maintained

AIR CONDITIONING 1BÐ85
Legend
(1) Duct Sensor
(2) Evaporator Assembly
(3) Amplifierblock
In Car Sensor
It is a photodiode used for detecting quantity of
solar radiation. This sensor converts the offset
signal generated by changes in the interior
temperature (which results from fluctuations in
solar radiation) into photoelectric current to enter
into the automatic heater/air conditioner control
unit.
This sensor is provided at top of the defroster grill.
Legend
(1) Sun SensorActuator
The actuators are power driven type containing a
small motor. Receiving output current from the
automatic heater/air conditioner control unit,
actuators drive the heater and blower unit mode
doors.
Actuators consist of the mode actuator used for
switching the mode (blow port selection), the mix
actuator used for changing aperture of the air mix
door, the intake actuator used for switching the
intake mode(fresh air/interior air).
Legend
(1) Mix Actuator
(2) Heater Unit
(3) Mode Actuator
(4) Blower Unit
(5) Intake Actuator
The actuator changes the motor speed using the
gear and drives each door rotating the output axis
united with the sliding contact.
2 31
860RX013
1
826RY00001
This illustration is based on RHD
2
5
431
860RX012
This illustration is based on RHD