battery ISUZU TROOPER 1995 Owner's Manual

Continued from previous page
~ • CHECK TO SEE IF CONTINUITY BETWEEN CHASSIS SIDE
RELAY TERMINAL NO. X5-4 AND CHASSIS SIDE
CONNECTOR
TERMINAL NO. C2-C9
• CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE RELAY TERMINAL NO. XS-1
•
RECONNECT THERMOSTAT RELAY
• CHECK TO SEE IF BATTERY VOLTAGE IS PRESENT AT
CHASSIS SIDE CONNECTOR TERMINAL NO. B4-3
OPEN CIRCUIT BETWEEN
NO. 123-6 AND NO. B4-3
• CHECK TO SEE IF BATTERY VOLTAGE (APPROX. 10V)
IS PRESENT
AT CHASSIS SIDE CONNECTOR TERMINAL
NO. B4-1
• CHECK TO SEE IF CONTINUITY BETWEEN CHASSIS
SIDE CONNECTOR
TERMINAL NO. B4-2 AND NO. 118-4
OPEN CIRCUIT BETWEEN NO. B4-2 AND NO. 118-4 OR
POOR GROUND (FAN SWITCH GROUND CIRCUIT)
AIR CONDITIONING 18-17
Continued from previous page
• CHECK TO SEE IF BATTERY VOLTAGE
IS PRESENT
AT CHASSIS SIDE CON­
NECTOR TERMINAL NO.
123-2
OPEN CIRCUIT
BETWEEN NO. C-20
(10A) FUSE
AND
NO. 123-2
AND NO. B4-1
OPEN CIRCUIT
BETWEEN XS-1
AND NO. 123-6
ELECTRONIC THERMOSTAT DEFECTIVE

18-18 AIR CONDITIONING
~ INDIVIDUAL INSPECTION
FAN CONTROL KNOB (FAN SWITCH) AND
AIR CONDITIONING (A/C) SWITCH (fig. 1 B-
12)
1. Check for continuity between fan switch and
AJC switch side connector terminals.

ITill [Eill
[fill [Eill ~ 11''''''·11
'"" ~~ -
-~
i'~EHffil ILLUMI-, . cl 3 LI LJ NATION I I 4
L_ _ _j AICSW. FAN SW. 1-18 1-23
~
1
2 3 4 5 6 1 2
n
.
OFF
1 0
FAN SW. 2 [)_ -11--::=:;-
3 o-~ -n. -o
4 [)_ -o
OFF (). f--NCSW. ON [)_
Fig. 18-12
HEATER & A/C (B-36), THERMOSTAT
(X-5) AND COMPRESSOR (X-7) RELAY
(fig. 18-13)
:;,_
6
-f)
-:;::;
1. Disconnect relays and check for continuity and
resistance between
relay terminals.
•
For handling of these relays, refer to Fig.
1A-10.
@
@
®
CD
®-0 ..... No continuity
(When battery voltage is applied between CD-@)
®-0 ..... Continuity
Fig. 18-13
PRESSURE SWITCH (Fig. 18-14)
1. Disconnect pressure switch connector and
check
for continuity between pressure switch
side connector terminals.
Fig. 18-14

AIR CONDITIONING 1 B -19
ON-VEHICLE SERVICE
GENERAL REPAIR PROCEDURE
Precautions for Replacement or Repair of Air
Conditioning Parts
There are certain procedures, practices and pre­
cautions
that should be followed when servicing air
conditioning systems:
• Keep your work area clean.
•
Always wear safety goggle and protective gloves
when working on refrigerant systems.
• Beware of the danger of carbon monoxide fumes
caused by running the engine.
• Beware of discharged refrigerant in enclosed or
improperly ventilated garages.
• Always disconnect the negative battery cable and
discharge and recover the refrigerant
whenever
repairing the air conditioning system.
• When discharging and recovering the refrigerant,
do not allow refrigerant to discharge too fast; it
will draw compressor oil out of the system.
• Keep moisture and contaminants out of the sys­
tem.
When disconnecting or removing any lines
or parts, use plugs or caps to close the fittings
immediately.
Never remove the caps or plugs until the lines or
parts are reconnected or installed.
•
When disconnecting or reconnecting the lines,
use
two wrenches to support the line fitting, to
prevent from twisting or other damage.
• Always install new 0-rings whenever a connec­
tion is disassembled.
• Before connecting any hoses or lines, apply new
specified compressor oil to the 0-rings.
• When removing and replacing any parts which
require discharging the refrigerant circuit, the
operations described in
this section must be per­
formed in the following sequence:
1. Use the J-39500 (ACR4
: HFC-134a Refrigerant
Recovery/Recycling/Recharging/System)
or
equivalent to thoroughly discharge and re­
cover
the refrigerant.
2. Remove and replace the defective part.
3.
After evacuation, charge the air conditioning
system and check for leaks.
Repair of Refrigerant Leaks
Refrigerant Line Connections
Install new 0-rings, if required. When disconnecting
or connecting lines, use two wrenches to prevent the
connecting
portion from twisting or becoming
damaged. (Fig. 1 B-15) Fig.
18-15
When connecting the refrigerant
line at the block
joint, securely insert the projecting portion of the
joint portion into the connecting hole on the unit side
and secure
with a bolt.
Apply specified compressor oil to the 0-rings prior
to connecting. (Fig. 18-16)
CAUTION:
Compressor (PAGI oil to be used varies according
to compressor model. Be sure to apply oil specified
for the model of compressor.
~1;1_ ~ ' .. J '--......
Fig. 18-16
0-rings must be closely aligned with raised portion
of refrigerant line. (Fig. 18-17)
Insert nut into union. First tighten nut by hand as
much as possible. Then, tighten nut to specified
torque. (Fig. 1 8-18)

1 B -24 AIR CONDITIONING
COMPRESSOR
Compressor bracket
Idle pulley
4
3
2
Fig. 1 B-24
1••1 REMOVAL
Preparation:
Disconnect the battery ground cable
Discharge and recover refrigerant (Refer to "RE­
FRIGERANT RECOVERY"
in this section.)
1. Magnetic clutch harness connector
2. Radiator fan shroud
3. Radiator fan
• When the fan is removed, be sure to tighten
the fan fixing nuts temporarily to their orig­
inal positions.
4. Drive belt
• Loosen idle pulley center nut and tension
adjustment bolt, then remove the drive belt
(Fig. 18-25).
Center nut
Idle pulley
Compressor
To Evaporator
I
5
Removal steps 1. Magnetic clutch harness
connector
2. Radiator fan shroud
3. Radiator fan 4. Drive belt 5. Refrigerant line connector
6. Compressor
Installation steps
To
install, follow the removal steps in the reverse order.
Fig. 1 B-25
•

1 B -26 AIR CONDITIONING
CONDENSER ASSEMBLY
Removal steps 1. Radiator grille
2. Front bumper assembly 3. Engine hood front end stay
4. Pressure switch connector 5. Refrigerant line
6. Condenser assembly
Installation steps To install, follow the removal
steps in the reverse order.
4
5
Fig. 1 B-28
1••1 REMOVAL
Preparation:
Disconnect the battery ground cable.
Discharge and recover refrigerant (Refer to
"REFRIGERANT RECOVERY" in this section.)
1. Radiator grille
2. Front bumper assembly
•
Refer to Section 2B "BUMPERS".
3. Engine hood front end stay
4. Pressure switch connector
5. Refrigerant line
• When removing the line connector, the
connecting part should immediately be
plugged or capped to prevent foreign matter
from being mixed into the line.
6. Condenser assembly
!••I INSTALLATION
6. Condenser assembly
l'l::r.l • If installing a new condenser, be sure to add
30cc ( 1.0
fl. oz.) of new compressor oil to a
new one.
• Tighten the condenser fixing bolts to the
specified
torque.
~~~ Torque N·m (lb-in) 6 (52)
5. Refrigerant line
•
Tighten the inlet line connector fixing bolt to
the specified torque.
~~~ Torque N·m (lb-in) 15 (11)
• Tighten the outlet line connector fixing bolt
to the specified torque.
~~~ Torque N-m (lb-in) 6 (52)
• 0-rings cannot be reused. Always replace
with new ones.
l'l::r.l • Be sure to apply new compressor oil to the 0-
rings when connecting refrigerant line.
4. Pressure switch connector
3. Engine hood front end stay
2. Front bumper assembly
1. Radiator grille
•

RECEIVER/DRIER
2. Pressure switch
3. Refrigerant
line
1••1 REMOVAL
Preparation:
Fig. 1 B-29
1. Radiator grille
Disconnect the battery ground cable.
Discharge and recover refrigerant (Refer to
"REFRIGERANT RECOVERY" in this section.)
1. Radiator grille
2. Pressure switch connector
3. Refrigerant line
•
When removing the line connected part, the
connecting part
should immediately be
plugged or capped to prevent foreign matter
from being mixed into the line.
4. Bracket bolt
5. Receiver/drier
• Loosen the bolt, then, using care not to touch
or bend the refrigerant line, carefully pull out
the receiver/drier.
I••I•NSTALLATION
To install, follow the removal steps in the reverse
order,
noting the following points:
1. If installing a new receiver/drier, be sure to add
30 cc ( 1.0 fl. oz.) of new compressor oil to a new
one.
2. Put the receiver/drier in the bracket, and
connect
with the refrigerant line. Check that no
excessive force is imposed on the line. Fasten
the bracket
bolt to the receiver/drier.
3. Tighten the line to the specified torque.
~~~ Torque N-m (lb-in) I 6 (52)
4. 0-rings cannot be reused. Always replace with
new ones.
5. Be sure to apply new compressor oil to the 0-
rings when connecting refrigerant line.
AIR CONDITIONING 1 B -27
PRESSURE SWITCH
1••1 REMOVAL
Preparation:
Fig. 18-30
2. Pressure switch
1.
Radiator grille
Disconnect the battery ground cable.
Discharge and recover refrigerant (Refer to
"REFRIGERANT RECOVERY" in this section.)
1. Radiator grille
2. Pressure switch connector
3. Pressure switch
• When removing the switch connected part,
the connecting
part should immediately be
plugged or capped to prevent foreign matter
from being mixed into the line.
I••IINSTALLATION
To install, follow the removal steps in the reverse
order,
noting the following points:
1. 0-ring canriot be reused. Always replace with a
new one.
2. Be sure to apply new compressor oil to the 0-
ring when connecting pressure switch.
3. Tighten the pressure switch to the specified
torque.
~~~ Torque N·m (lb-in) 13 (113)

1 B-28 AIR CONDITIONING
EVAPORATOR ASSEMBLY
8
Removal steps 7. Drain hose
1. Front console assembly 8. Refrigerant line
2. Lower cluster assembly 9. Evaporator assembly
3. Glove box 4. Instrument panel passenger lower cover assembly Installation steps
5. Passenger knee bolster reinforcement assembly To install, follow the removal in the reverse order.
6. Resister and electronic thermostat connector
Fig. 18-31
EJ REMOVAL
Preparation:
1.
2.
3.
4.
5.
6.
7.
8.
Disconnect battery ground cable.
Discharge and recover refrigerant (Refer to
"REFRIGERANT RECOVERY"in this section.)
Front console assembly
Lower cluster assembly
Glove box
Instrument panel passenger lower cover
assembly
Passenger knee bolster reinforcement assembly
• Refer to Section 10 "BODY" for INSTRUMENT
PANEL ASSEMBLY removal procedure.
Resister
and electronic thermostat connector
(Fig. 1 B-32)
Drain hose
Refrigerant line
• Use back-up wrench when disconnecting and
reconnecting the refrigerant lines. •
When removing the refrigerant line con­
nected part,
the connecting part should
immediately be plugged or capped to prevent
foreign matter from being mixed into the line.
9. Evaporator assembly
Electronic thermostat
/ Resistor connector
Fig. 1 B-32
•

I••IINSTALLATION
To install, follow the removal steps in the reverse
order,
noting the following points:
1. To install a new evaporator assembly, add 50cc
(1.7 fl.oz.) of new compressor oil to a new core.
2. Tighten the refrigerant outlet line to the
specified torque.
~~~ Torque N·m (lb.ft) 25 (18)
AIR CONDITIONING 1 B-29
3. Tighten the refrigerant inlet line to the specified
torque.
~~~ Torque N·m (lb·ft) 15 (11)
4. 0-rings cannot be reused. Always replace with
new ones.
5. Be sure to apply new compressor oil to the 0-
rings when connecting lines.
ELECTRONIC THERMOSTAT, EVAPORATOR CORE AND/OR EXPANSION VALVE
1
Removal steps 1. Evaporator assembly 2. Electronic thermostat
3. Clip 4. Attaching screw
5. Upper case 6. Lower case 7. Evaporator core 8. Expansion valve
Installation
steps
To install, follow the removal steps in the reverse order.
Fig. 1B-33
1••1 REMOVAL
Preparation:
Disconnect the battery ground cable
Discharge and recover refrigerant (Refer to
"REFRIGERANT RECOVERY" in this section.)
1. Evaporator assembly
• Refer to "EVAPORATOR ASSEMBLY" re­
moval procedure in this section.
2. Electronic thermostat
• Remove the sensor fixing clip.
• Pull
the sensor from the evaporator
assembly.
3. Clip
4. Attaching screw
5. Upper case
6. Lower case
• Slit the case parting face with a knife since
the lining is separated when removing the
evaporator (Fig. 1 B-34).
• Lift to remove the upper case (Fig. 1 B-35).
7. Evaporator core (Fig. 1 B-36)
8. Expansion valve
•
Tear off the insulator carefully.
•
Remove the sensor fixing clip.
•
Use a back-up wrench when disconnecting
all refrigerant pipes.

AIR CONDITIONING SWITCH AND
ILLUMINATION BULB
i-..---3. Illumination bulb
1++1 REMOVAL
Preparation:
Fig. 18-38
A/C -Air Conditioning
Disconnect the battery ground cable
1. Control lever assembly
• Refer to Section 1A "CONTROL LEVER
ASSEMBLY" removal procedure.
2. Air conditioning switch
• Raise up the catch portion of the switch and
remove the switch while pushing it toward
the outside (Fig. 1 B-39).
3. Illumination bulb
• Turn the illumination bulb counterclockwise
to remove.
I••IINSTALLATION
To install, follow the removal steps in the reverse
order.
End of switch
Fig. 18-39
AIR CONDITIONING 1 B -31

1 B -32 AIR CONDITIONING
REFRIGERANT LINE
5
Removal steps
1. Radiator grille 2. Air cleaner
3. Clip and clamp 4. Liquid line
(High-pressure pipe)
5. Suction line (Low-pressure pipe)
6. Suction line (Low-pressure hose) 7. Discharge line (High-pressure hose)
Installation steps To install, follow the removal steps
in the reverse order.
3 3
1++1 REMOVAL
Fig. 18-40
I••IINSTALLATION
Preparation:
Disconnect the battery ground cable
Discharge and recover
refrigerant (Refer to
"REFRIGERANT RECOVERY" in this section.)
1. Radiator grille
2. Air cleaner
3. Clip and clamp
4. Liquid line (High-pressure pipe)
5. Suction line (Low-pressure pipe)
6. Suction line (low-pressure hose)
7. Discharge line (High-pressure hose)
• Use a back-up wrench when disconnecting
and reconnecting the refrigerant lines.
• When removing the refrigerant line
connecting part, the connecting part should
immediately be plugged or capped to
prevent foreign matter from being mixed
into the line. To
install,
follow the removal steps in the reverse
order,
noting the following points:
1. 0-rings cannot be reused. Always replace new
ones.
2. Be sure to apply compressor oil to the 0-rings
when connecting refrigerant lines.
3. Tighten the refrigerant line to the specified
torque.
(Refer to "MAIN DATA AND SPECIFICATION"
for TORQUE SPECIFICATIONS in this section.)
•