1987 MITSUBISHI MONTERO window

8-204 I BACK DOOR WINDOW DEFOGGER-Troubleshooting
TROUBLESHOOTING NOBPH-B
Neither the back door window defogger nor the indicator function.
0 0 0 @
The indicator functions, but the back door window defogger does not
function.
0 0 0
.---
Number in circle indicates inspection sequence.
/ STB Rqvision

BACK DOOR WINDOW DEFOGGER - Circuit Diagram 8-205
CIRCUIT DUAGRAM
DEFOGGER CIRCUIT -t IDI L
m
- H-UL Ll&J Sub fusible link
5-w A-23 0.5-G 1 5-w"5'w m
z-w ,
u
fusible ignition switch
Main
link
To light control
relay w zmR~
[Refer to P.8-461
q--l-
2 @fuse
i
Multi-purpose m
E
c:
t
To column switch
[Refer to P.8-461
1.25-B
a
c!
Rheostat
Defogger switch a
cl
31 W02:
Remarks
For information concerning the ground points (example:D).
refer to P.8-7.
Wiring color code
B: Black Br: Brown G: Green Gr: Gray L: Blue Lg: Light green
LI: Light blue 0: Orange P: Pink R: Red Y: Yellow W: White STB Revision

DEFOGGER SWITCH
1
REMOVAL AND INSTALLATION
8-206 BACK DOOR WINDOW OEFOGGER - Defogger Switch
I
NOEPJAB
1. Defogger switch
NOTE
+* : Refer.to “Service Points . ^
I_ A w
ot Kernoval” 16W932
I
16W976 J
SERVICE POINTS OF REMOVAL
1. REMOVAL OF DEFOGGER SWITCH
lr@rt the special tool into the switch and pry the switch to
remove it from the instrument panel.
INSPECTION
DEFOGGER SWITCH
(1) Remove the defogger switch from the instrument panel
and connect an ohmmeter to the switch side connector.
(2) Operate the switch and check the continuity between the
terminals. * : Indicator light
** : Illumination light
NOTE
0-C indicates that there is continuity between the terminals.
1 STB Revision
~-E

BACK DOOR WINDOW DEFOGGER - Printed Heater Lines B-207
Normal characteristic curve
Voltage
I;\
Positive
terminal Printed heater line Negative
terminal
Abnormal characteristic curve
Voltage
IZV
6V
ov :-
Tf I Open-circuit
I point
I
i
!
Positive Printed heater line Negative
terminal terminal
161332
Alignme.nt holes
Masking tape
16FfiSCl
PRINTED HEATER LINES
INSPECTION N08PKAA
1. The printed heater lines should be tested while the engine
is running at 2,000 rpm and the battery is being charged.
2. Turn the defogger switch to the “ON” position, and use
voltmeter to measure the voltage of each printed heater
line at the back door window glass center point “A”.
3. If all of the heater lines indicate approximately 6V, the back
door window printed heater lines are functioning properly.
4. If a voltage of 12V is indicated at point “A”, the heater line
is broken between point “A” and the negative (-) terminal.
Move the test probe gradually toward the negative (-)
terminal, and search for the place where there is a sudden
change in the voltage (to 0 V).
5. This place where the voltage suddenly changes indicates
the location of the broken heater line.
6. If OV is indicated at point “A”, the heater line is broken
between point “A” and the positive (+) terminal. Find the
point where there is a sudden change in the voltage (to
12V). as described in step 4. above.
REPAIR
I. Prepare the following items:
e Conductive paint
@ Paint thinner
e Masking tape, decal, etc.
a, Unleaded gasoline
@ Thin brush
Wipe the glass adjacent to the broken heater line, clean
with unleaded gasoline, and bond a decal or masking tape
as shown.
2. Shake the electroconductive paint container well, and
remove the amount of paint needed. Dilute it with a small
quantity of paint thinner, and apply three coats with the
brush at intervals of about 15 minutes.
3. Remove the tape or decal and leave the repaired defogger
unused for a while before supplying power.
4. For a better finish, scrape away excess deposits with a
knife after drying is complete (one day later).
Caution
After repair, clean the glass with a soft dry shop towel
or wipe along the printed heater line with a slightly
moistened shop towel.
1 STB Revision

24-34 AIR-CONDITIONING-Service Adiustment Procedures
r---- :
:ES
Dry bulb therr&neter
2OW825
PEAFORMANCE TEST
TESI N24FWAB NOTE
Air temperature in test room must be 21°C (70°F) minimum for this
test.
(1) Connect a tachometer and manifold gauge set.
(2) Set air conditioner controls to Max air conditioner, tempera-
ture lever on full cool, and blower on high.
(3) Turn engine on 1000 rpm with air conditioner clutch engaged.
(4) Engine should be warmed up with doors, windows, and hood
open.
(5) Insert a thermometer in the left center air conditioner outlet
and operate the engine for 5 minutes.
(6) Note the discharge air temperature.
NOTE
If the clutch cycles, take the reading before the clutch disen-
gages.
Performance Temperature Chart Garage ambient
temperature
21 “C 26.5 “C 32 “C 37.5 “C 40.6 “C (70 “F) (80 “F) (90 “F) (100 “F) (I 05 “F)
Discharge air
temperature
Compressor
discharge pressure
Evaporator suction
pressure
1.7-4.4 “C 1.7-5.0 “C 1.7-5.6 “C 1.7-6.1 “C 1.7-6.7 “C (35-40 “F) (35-41 “F) (35-42 “F) (35-43 “F) (35-44 “F)
928- 1,322 kPa 1.069-1.547 kPa 1,209-1,772 kPa 1,336-1,969 kPa 1,406-2,109 kPa
(132-188 psi) (152-220 psi) (172-252 psi) (190-280 psi) (200-300 psi)
127-148 kPa
131-162 kPa 134-176 kPa 135- 188 kPa 136-194 kPa
(18-21 psi) (18.6-23 psi) (19-25 psi) (19.2-26.8 psi) (19.4-27.6 psi)
REFRIGERANT LEAK REPAIR PROCEDURE N24FnAB
LOST CHARGE If the system has lost all charge due to a leak:
(1) Evacuate the system. (See the procedure).
(2) Charge the system with approximately one pound of refriger-
ant.
(3) Check for leaks.
(4) Discharge the system.
(5) Repair leaks.
(6) Replace receiver drier.
Caution
Refrigerant
leak tester
Replacement filter-drier units must be sealed while in stor-
age. The drier used in these units will saturate water quickly
upon exposure to the atmosphere. When installing a drier,
have all tools and supplies ready for quick reassembly to
avoid keeping the system open any longer than necessary. (7) Evacuate and charge the system.
LOW CHARGE If the system has not lost all of its refrigerant charge; locate and
tester repair all leaks. If it is necessary to increase the system pressure
up to find the leak (because of an especially low charge) add refrig-
erant. If it is possible to repair the leak without discharging the
refrigerant system, use the procedure for correcting low refriger-
2OUO316 ant level.
1 STB Revision

AIR-CONDITIONING-Service Adiustment Procedures 24-35
CORRECTING LOW REFRIGERANT LEVEL Suction
Discharge gauge
gauge
I \- a/
gauge valve
II II Discharge gauge
Ho water
52°C i 125°F)
2OUO325
Since the refrigeration system is completely sealed, refrigerant level will not be low unless there is a leak in the
system.
Before adding refrigerant when the cause of low level is not known, the system should be tested for leaks.
Assuming that leaks have been corrected without discharging the system, proceed with partial charge.
Install and connect manifold gauge set.
(I) Close both gauge set manifold valves.
(2) Connect the suction gauge test hose to the suction port of the compressor. Connect the discharge gauge test
hose to the discharge port.
(3) Connect one end of long test hose to center manifold outlet, other end to refrigerant dispensing manifold.
(4) Close two dispensing manifold valves and open remaining dispensing manifold valve. Remove protective cap
from opened valve.
(5) Screw a can of R-12 to the opened manifold valve. Be sure gasket is in place and in good condition. Tighten
refrigerant can and manifold locking nut to insure a good seal. Do not overtighten. 8 to 11 Nm (6 to 8 ft.lbs.) is
sufficient if gasket is in good condition.
(6) Turn manifold valve (above the refrigerant can) completely clockwise to puncture the can. This closes the valve
and seals the refrigerant in the can. Caution
Never heat small cans of refrigerant over 52°C (125’F) as they may explode.
(7) Place the refrigerant in a large pan of water heated to 52°C (125°F). Place pan of water containing the refrigerant
can on an accurate scale so the amount of refrigerant added can be weighed. Open the refrigerant manifold
valve. (8) Purge all air from test hoses.
Air in the system will be trapped in the condenser causing abnormally high
discharge pressures and interfering with condensing of the refrigerant.
(9) Slightly loosen both test hoses at the gauge set manifold. Tighten the hoses as soon as the air is purged.
(10)Slightly loosen charging hose connection at gauge set manifold. This will purge air from the charging hose.
Tighten connection as soon as air is purged.
(1l)With vehicle windows open and hood up, operate engine at 1,500 rpm and jump the switch terminals located
on so the clutch will remain engaged.
(12)Place air conditioner control on air conditioner and place the blower switch on high.
(13)lf necessary, block the condenser to maintain a discharge pressure of 1,422 to 1,520 kPa (206 to 220 psi.).
System must be charged through the evaporator suction service ports as follows:
(a) Slowly open the suction service gauge valve.
Meter flow of refrigerant by adjusting the suction service
gauge valve so that pressure registered at the suction service gauge does not exceed 345 kPa (50 psi). Keep refrigerant container upright.
(b) Add refrigerant gas until there is no foam visible at the sight glass.
(c) Close the suction gauge valve. Caution
Too much refrigerant in the system can cause abnormally high discharge pressures. Care must be
used so that the exact recommended amount of refrigerant is added after foam clears in the sight
glass.
(d) Close dispensing manifold valve. Remove test hoses and adapters from the service ports of compressor,
install protective caps at service ports and reconnect wiring. / STB Revision