air condition MITSUBISHI MONTERO 1987 1.G User Guide

8-84 CHARGING SYSTEM - Alternator
REMOVAL AND INSTALLATION (Vehicles with Air Conditioner)
30-35 Nm
20-22 Nm
14-16 ft.lbs. D Draining of Refrigerant (Refer to
CONDITIONING - Service Adjust-
1 ‘ost-installation Operation
1 Charging of Refrigerant (Refer to
GROUP 24 HEATERS AND AIR
CONDITIONING - Service Adjust-
ment Procedures)
D Adjustment of Drive Belt Tension
(Refer to GROUP 7 COOLING and
GROUP 24 HEATERS AND AIR
CONDITIONING ~ Service Adjust-
ment Procedures)
:emoval steps
1. Connection of high pressure hose
2. Connection of low pressure hose
3. Connection of compressor connector
4. Compressor
5. Connection of alternator connector
~~ 6. Alternator
OTE
) Reverse the removal procedures to reinstall.
I) e+ : Refer to “Service Points of installation” 16W1566
/ STB Revision

IGNITION SYSTEM - Service Adjustment Procedures 8-111
SERVICE ADJUSTMENT PROCEDURES
CHECKING IGNITION TIMING NOEGIBA
IGNITION TIMING ADJUSTMENT
Adjustment conditions:
Coolant temperature: 80-90°C (170-I 90°F)
Lights and all accessories: Off
Transmission: N (Neutral)
1. Connect tachometer and timing light.
2. Start eng.ine and run at curb idle speed.
I
Curb idle speed rpm
First 500 km
(300 mile)
After 500 km
(300 mile)
725';;;
800 ?I00 3. To make adjustment at high altitude, disconnect pressure
sensor connector before stopping engine. Then restart
engine and run it at curb idle speed.
4. Check basic ignition timing and adjust if necessary.
Basic ignition timing: 7” + 2”BTDC 5. To adjust ignition timing, loosen distributor mounting nut
and turn distributor housing.
6. After adjustment, securely tighten mounting nut.
7. Reconnect pressure sensor connector disconnected in
Step 3. Then run engine at curb idle speed to make sure
that actual ignition timing is obtained.
. .
CHECKING IGNITION SYSTEM NOBDIDB
CHECKING CENTRIFUGAL ADVANCE EQUIPMENT 1.
Set the tachometer and timing light.
2. Start the engine and allow it to idle.
3. Pull out vacuum hose from vacuum controller.
4. Check the advance while slowly raising RPM. If the advance is
smooth when accompanying the increasing RPM, this is
normal.
Symptom Assumed causes
Excessive advance
Weakness of the governor spring
Sudden advance rise
Broken spring
Insufficient advance or large
Impaired movement of the gover-
hysteresis
nor weight or cam.
5. If the malfunction indicators above are confirmed, dismantle
and check the distributor.
6. After checking, let the engine idle and then turn the ignition
switch to OFF.
7. Remove the tachometer and timing light.‘.
1 STB Revision

8-194 AUDIO SYSTEM - Circuit Diagram
CIRCUIT DIAGRAM
I
RADIO/CASSETTE DECK CIRC,UIT
LW
033 w
Ignition switch
Battery A-02 IL-
Sub fusible link
0 1.25-B A-23 0.5-G 2 w
1 5-w 5-w ll5-w m -
u
Main fusible
link
N To light control
relav Z-RW 3 4
[Refer to P.8-461
Z-RW,,:
To air conditioner,LW
[Refer to P.8-561
To combination
By meter 4
[Refer to P.8-521
DIN Cable
I
/
J
I Y
=z
I
c- 45 -
It, /II
1 L
Radio Tape player
[ STB Revision

24-1
AIR-CO IONING
CONTENTS
AIR-CONDITIONING
AIR CONDITIONER SWITCH ......................... 42
CIRCUIT DIAGRAM ...................................... . . 26
COMPRESSOR ............................................... 46
EVAPORATOR ............................................ . ... 43
GENERAL INFORMATION .............. . ....... . . . .... 19
RECEIVER DRIER, CONDENSER,
COMPRESSOR CLUTCH ASSEMBLY .......... 45
SAFETY PRECAUTIONS ................................ 28
SERVICE ADJUSTMENT PROCEDURES ...... 29
Compressor Drive Belt Adjustment ...........
40
Compressor Noise ..................................... 41
Handling Tubing and Fittings ..................... 39
Manifold Gauge Set Installation ................ 29
Performance Test ...................................... 34
Refrigerant Leak Repair Procedure ........... 34
Test Procedures ......................................... 29
Testing System for Leaks .......................... 33
SPECIAL TOOLS ............................................ 22
SPECIFICATIONS ...... . .
.. . ................................ 21
General Specifications ...............................
21
Service Specifications ................................
21
Torque Specifications ................................
21
TROUBLESHOOTING .................................... 22 Air is Emitted but Is Not Cool
Cool Air Flow Is Intermittent
Insufficient Air Flow
Insufficient Cooling
HEATERS
BLOWER ASSEMBLY . . . . . . . . . . . . . . . . . . ..a............... 14
CIRCUIT DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
GENERAL INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
HEATER CONTROL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
HEATER UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
SERVICE ADJUSTMENT PROCEDURES . . . . . . 5
Temperature Control System
Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Water Valve Replacement . . . . . . . . . . . . . . . . . . . . . . . 8
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Blower Motor Inoperative
Blower Motor Operates on High
Speed Only
Improper Heat
No Ventilation Even When Mode
Selection Lever Is Operated
VENTILATORS . . . . . . . . . . . . . . . . . . . . . . . . . . . ..a..... . . . . . . . . . . . .
16

24-16 HEATER? - Ventilators
VENTILATORS
REMOVAL AND INSTALLATON (Ventilators of instrument panel) N24MA-
‘16
zowaa I4
Removal steps
1. Demister grill
2. Lap heater garnish
3. Lap heater duct (B)
4. Lap heater duct (C)
5. Defroster duct (L.H.)
6. Lap heater duct (A)
7. Defroster duct (R.H.)
8. Air duct (R.H.) (Only vehicles with air
conditioner)
9. Lap heater duct (A)
10. Air duct (L.H.) (Only vehicles with air
conditioner) 11. Instrument panel
12. Defroster duct
13. Center ventilator duct
14. Center air outlet
15. Knob
16. Air duct
17. Side air outlet
NOTE
(1) Reverse the removal procedures to reinstall.
(2) +e : Refer to “Service Points of Removal”
SERVICE POINTS OF REMOVAL N24MBAG
1. REMOVAL OF DEMISTER GRILL
While using a screwdriver to pry the lock of the demister
grill, use another screwdriver to pry the end of the
demister grill to remove it.
levision

AIR-CONDITIONING-General Information 24-19
GENERAL INFORMATION N2400AC
The air conditioner blows out cooled air by driving the compressor when the air conditioner switch installed
on the heater control papnel is pressed ON and the position of the blower switch is out of OFF position.
The temperature in the cabin is adjusted by the position of the temperature control lever which determines the
opening of the blend air damper and adjusts the mixing ratio of the cooled air and warm air.
The blowout made is ‘z , and the cooled air is blown out from four directions, and the blowout can be adjusted
by the blower switch changes the blowout in four stages by the cabin condition.
The air selector is set on P&J during cooling, and can be changed to & according to the offensive smell and
pollution.
$;e;election
I Mode selection
lever
I
Blower sditch Air-cdnditioner
switch Temberature
control lever
58W539
Mode selection
damper (VENT)
Heater core
Fresh air
Mode selkction
damper
(FOOT/DEF) Evapdrator Blower! motor
2OW830
selection damper STB Revision
1

24-20 AIR-CONDITION!NG-General Information
I
AIR-CONDITIONING SYSTEM COMPO
N24BBBB
Condenser MDuct, joint (Blower side)
oint (Heater unit
Condenser
2OWB31
Suction Pipe Receiver bracket side)
COMPRESSOR - The prime purpose of the compressor is to compress the low pressure refrigerant vapor
from the evaporator into a high pressure, high temperature vapor. The 6 cylinder 6P148 compressor is used.
MAGNETIC CLUTCH is mounted on the compressor providing a convenient way to drive and disengage
compressor in accordance to the cooling needs. CONDENSER is located in front of the radiator. Its function
is to cool the hot, high pressure refrigerant gas causing it to condense into high pressure liquid refrigerant.
RECEIVER DRIER is used to remove any traces of moisture from the refrigerant system. This component
incorporates the sight glass and fusible plug. SIGHT GLASS at the top of the receiver drier is provided as a
diagnostic tool to observe refrigerant flow and observe refrigerant level. THE FUSIBLE PLUG is located on
the receiver drier. Its function is to prevent damage to the air conditioning system in the event that
excessive pressure develops due to condenser air flow being restricted by, for example, leaves, newspaper,
an overcharge of refrigerant, or air in the system. LOW PRESSURE SWITCH prevents damage to the
compressor in case of system loss of refrigerant charge. EXPANSION VALVE - The expansion valve is used
for all applications. Its function is to meter refrigerant into the evaporator in accordance with cooling
requirements. EVAPORATOR COIL is located in the unit and its function is to cool and dehumidify the air
before it enters the vehicle. FREEZE UP CONTROL FIN THERMOSTAT SENSOR is installed at the heater
side of evaporator. The main function of a freeze control is to keep condensate water on the face of the
evaporator coil from freezing and restricting air flow. WATER TEMPERATURE SWITCH - When the
temperature of the radiator coolant became high, this switch functions to stop the compressor and prevent
engine overheating. SERVICE VALVE at the compressor and the discharge line. The valves are used to test
and service the refrigerant system. REFRIGERANT R-12 is used maximum amount 907 g (32 oz.) R-12.
COMPRESSOR OIL is used DENS0 oil 6 maximum amount 110 cc (3.7 U.S.fl.oz., 3.9 Imp.fl.oz.).
/ STB Revision