1987 MITSUBISHI MONTERO light

AUDIO SYSTEM - Specifications 8-193
NOISE SOURCES
Source of Electrical System Noise
Ignition system
(1) Spark plug
(2) High tension cable
(3) Distributor Power generation system
(1) Ripple at contact between alternator
armature and carbon brush
(2) Spark from voltage regulator contact
!
Other electrical device
(1) Armature of wiper, blower and other
motors.
(2) Starter and switch when starting engine
(3) Spark from changeover switch
(4) Horn
(5) Contact of turn signal
(6) Loose contact of wiring harness
(7) Static electricity generated by tire or
generator drive-belt
(8) Voltage stability unit for instrument
Noise Sourse of Vehicle Equipment
Kind of noise
Whistling sound Equipment
Alternator Symptom of noise generation
Noise increases when accelerator pedal is
depressed and it subsides soon after engine
is stopped.
Scratching sound
Water temperature gauge unit Noise is produced while engine is running
and it persists for a while after engine
shutdown.
Fuel gauge unit Noise is produced at sudden acceleration,
driving on rough road or when ignition key is
placed to ON.
Jarring
Wish-wash,
wish-wash
Buzz, click Oil pressure switch
Flasher relay
Horn
Wiper motor
Washer motor Noise is produced with engine operation
and no noise is made when engine is idling.
Noise is produced with operation of turn
signal light
Noise is made when horn button is pressed
or released.
Whinning Noise is generated with the wiper speed.
Noise is made when washer is operated.
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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
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AUDIO SYSTEM - Circuit Diagram 8-195
(L.H.)
C-65 Front speaker
YL B-03
Gr,=: (L.H.)
B-04
B-29
YR c
GrRC+
(R.H.)
B-2?’
Remarks
(1) For information concerning the ground points (exam-
ple: 0 ), refer to P.8-7.
(2) The symbols 0, 0, etc. indicate that the wiring is
connected (using the same numerical symbol) to the
facing page.
(in other words, 0 on the right page is connected to 0 on
the left page.)
Wiring color code
B: Black Br: Brown G: Green Gr: Gray L: Blue
LI: Light blue 0: Orange P: Pink R: Red Y: Yellow Rear speaker
Lg: Light green
W: White
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AUDIO SYSTEM - Noise Suppression 8-201
NOISE SUPPRESSION CHART
Symptom
Unusual noise related to
engine speed. ’ Remedy
Securely ground the engine, frame and/or body and engine
hood.
- Ground wire
16E71C
“Clatter” noise related to the
Turn signals
flashing of turn signal lights Connect a 0.5 FF noise-suppression capacitor to the 6 terminal
of the flasher unit.
Abnormal noise when
the horn is operated. Horn ?L - 0.5pF noise suppression
capacitor
16E71:
1. Connect a 0.5 FF noise-suppression capacitor to the + B
terminal of the horn.
2. For an FM radio, connect an LC filter to the horn terminals.
Noise when the wind-
shield washer oprates. Washer motor Horn LC filter
16E71:
1. Connect a 0.5 PF noise-suppression capacitor between
the terminal of the washer motor and the power source
wire.
2. For an FM radio, connect an LC filter between the terminal
of the washer motor and the power source wire.
Unusual noise when the
engine is started. Water tempera-
ture gauge unit Connect a 0.1 p,F noise-suppression capacitor to the terminal o
the water temperature gauge unit.
0.1 PF noise suppression
capacrtor
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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.
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~-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.
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8-208 AUTO
ATIC FREE-WHEELING HUB INDICAUOR SYSTEM - General Information
GENERAL INFORMATION ’ N08RAAA
This system is composed of the automatic free-wheeling hub indicator light, the vehicle-speed sensor (reed
type switch), the automaic free-wheeling hub itidicator control unit, and the pulse generator.
The pulse
generator is located at the rear part of the front output shaft of the transfer; the vehicle-speed
sensor is incorporated within the combination meter.
Based upon the output signals from the pulse generator and from the vehicle-speed sensor (reed type
switch), the automatic free-wheeling hub indicator control unit judges whether the automatic free-wheeling
hub is in the locked condition or the free condition.
When it is in the locked condition, the indicatok light
illuminates; when it is in the free condition, the
indicator light does not illuminate.
This is, therefore, a system which makes it easy to see, from the driver’s seat, whether the automatic free-
wheeling hub is in the locked condition or the free condition.
I j
21 1
Automatic free-wheeling hub
hub indicator
16W1506 16W1567
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