key MITSUBISHI MONTERO 1987 1.G User Guide

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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8-196 AUDIO SYSTEM - Service Adjustment Procedures
SERVICE ADJUSTMENT PROCEDURES
ANTkNNA TRUMMER NOBNIAA
70R0351
1.
2.
3.
1.
2.
3.
4.
5. The antenna trimmer is essential for matching the antenna
with the radio in order to obtain the maximum sensitivity of
the radio.
It must be adjusted with the antenna actually mounted on
the vehicle. If the trimmer is not adjusted properly, the
radio suffers from not only low sensitivity but also noises,
su’ch as external noise and noise from passing vehicles.
In the following cases, therefore, adjust it as described
below.
(1) When radio is installed.
(2) If antenna is replaced.
(3) If radio has low sensitivity.
(4) If radio is noisy.
AkTENNA TRIMMER ADJUSTMENT
Mgke the following preparations for adjustment:
(1)’ Turn the ignition key to the “ACC” position.
(2) Extend the antenna all the way.
(3) Tune accurately to a station near 1,400 kHz in order to
receive a broadcast in as weak an electric field as can
be barely received. If there is no station near 1,400 kHz,
tune to any high-frequency station (above 1,000 kHz)
available. If there are two or more stations near 1,400
kHz, choose the louder one.
(4) Set the volume control to the proper volume.
(5) Set the tone ccontrol to treble position.
Be sure that preparations 1 through 5 have been correctly
made.
Insert a screwdriver into the trimmer adjusting hole.
Tumrn the screwdriver clockwise or counterclockwise for
maximum sensitivity (maximum broadcast wave sound).
If the optimum sensitivity point cannot be found, check for
an antenna malfunction or a broken wire.
NOTE
The antenna trimmer of an electronic tuning radio does not
require adjustment.
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AUTOMATIC FREE-WHEELING HUB INDICATOR SYSTEM - General Information 8-209
OPERATIONAL CHARACTERISTICS OF THE SYSTEM
Time-----w
16W1548 Indication by automatic free-wheeling hub indicator light
No illumination of the indicator light when the ignition key is turned from OFF to ON,
regardless of the condition of the automatic free-wheeling hub.
The indicator light illuminates when the automatic free-wheeling hub is locked and pulse
signals are output from the pulse generator, and when, in addition, the vehicle-speed sensor
detects a vehicle speed of approximately 2.5 mph (4 km/h) or higher.
The locked condition is entered in the memory even if the vehicle is stopped (with ignition
key still at ON) while the automatic free-wheeling hub is in the locked condition, and the
indicator light illumination continues.
After the automatic free-wheeling hub is changed from the locked condition to the free
condition (the pulse signals from the pulse generator cease), the indicator light remains
illuminated until the vehicle-speed sensor detects a vehicle speed of approximately 2.5 mph
(4 km/h) or higher. Symbols used in
above diagram
A
B
C
D
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8-210 AUTOMATIC FREE-WHEELING HUB INDICATOR SYSTEM - General Information
EXPLANATION OF INDICATOR OPERATION
.
1.
2. Automatic free-wheeling hub in locked condition
The
output of the pulse generator is input to $ertninal 4 of the control unit, and the output signals from
the vehicle-speed sensor are input
to termi#al 3 of the control unit.
Only when there are pulse signals from the pulse generator, and when, moreover, the vehicle-speed
signals indicate a vehicle speed of approximatkly 2.5 mph (4 km/h) or highter does the control unit judge
that the automatic free-wheeling hub is the locked condition at the lock-discrimination circuit of the
control unit, and therefore the set signal (locked condition) is output.
This signal is entered into the memory circuit, thus causing the indicator light to illuminate.
Pulse generator Speed sensor
(Reed switch)
Pulse-detection circuit / I I
Memory circuit rp*
I
Automatic free-wheeling hub Lock-discrimin&ion circuit
indicator control unit 16W1535 Ignition switch
‘use No. 3 n
J 2
I_
Power-supply circuit
Vehicle-speed
detection circuit 1
Sub fusible link 1
Main fusible link 1
)
1
Battery
When vehicle is stopped (with ignition key still at ON) with automatic free-wheeling hub locked
Signals are not output from the pulse generator and the vehicle-speed sensor when the vehicle is
stopped.
However, because the set signal (locked condition) is entered into the memory circuit, the indicator light
shows the condition in effect when the vehicle was traveling.
Pulse generator Speed sense
Pulse-detecti: ci~uit~~I~ #
Lock-discrimination circuit
Memory circuit ‘use No. 3 Ignition switch
10~ Automatic free-
3; wheeling hub
I/\’ indicator light
Sub fusible link
Power-supply circuit
Main fusible link
detection circuit
Automatic free-wheeling hub
indicator control unit
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AUTOMATIC FREE-WHEELING HUB INDICATOR SYSTEM -Troubleshooting 8-213
TROUBLESHOOTING NOIRH-
Inspection items
Symptom
Reference page
3-21E
0 The indicator light does not illuminate
although the automatic free-wheeling
hub is in the locked condition and the
vehicle speed is approximately 2.5 mph
(4 km/h) or higher.
0 0 0
0
The indicator light does not illuminate
when the vehicle is stopped (with the
ignition key at ON) after traveling, even
though the automatic free-wheeling hub
is in the locked condition.
The indicator light remains illuminated
when the ignition key is turned from OFF
to ON.
0
0 0 0
a 0
The indicator light remains illuminated
when (after traveling with the automatic
free-wheeling hub in the locked
condition) the vehicle is stopped, the
automatic free-wheeling hub is changed
to the free condition, and the vehicle is
then driven at a speed of approximately
2.5 mph (4 km/h) or higher.
0 Cc 0
NOTE
Number in circle indicates inspection sequence.
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8-216 AUTOMATIC FREE-WHEELING HUB INDICATOR SYSTEM - Control Unit
AUTOMATIC FREE-WHEELING HUB INDICATOR CONTROL UNIT
REMOVAL AND INSTALLATION
I NOBRKAA
Removal steps 1. Glove compartment stopper /
1 16W1568 2. Automatic free-wheeling hub indicator
NOTE control unit Reverse the removal procedures to reinstall.
CHECKING OUTPUT VOLTAGE OF THE VEHICLE-
SPE$D SENSOR (REED TYPE SWITCH) I. Turn the ignition key to ON.
2. Insert a test probe from the rear side of the conncetor of
the automatic free-wheeling hub indicator control unit.
3. Measure the output voltage of the vehicle-speed sensor
when the vehicle is moved a distance of about 0.5 m (1.6
ft.).
Standard values :
Vehicle-speed sensor OFF : 4V or higher
Vehicle-speed sensor ON : OV If there is a malfunction of the vehicle-speed sensor,
replace it by replacing the speedometer assembly.
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24-46
COMPRESSOR
AIR-CONDITIONING - Compressor
DISASSEMBLY AND REASSEMBLY N24TE-
15-h Nm
11-13 ftlbs 16
a 0
I
26-26 Nm
16-20 ftlbs. Magnetic clutch disassembly steps
1. Nut
~~ Adjustment of clutch clearance
2. Clutch hub
3. Shims
4.
Snap ring
4* 5. Rotor assembly
6.
Snap ring
7.
Ground terminal
l + 8. Clutch coil
l5Dl
2QY947 Compressor front housing and service valve disas-
sembly steps
9. Oil drain guide
10.
Woodruff key
Il. Through bolt
** Refilling of compressor oil
12. Front housing
o+
13. Shaft seal
04 14.
Shaft plate
15.
Gasket
16. O-ring
NOTE
(1) Reverse the disassembly procedures to reassemble.
(2) +e : Refer to “Service Points of Disassembly”.
(3) e+ : Refer to “Service Points of Reassembly”.
(4)
q : Non-reusable parts 1 STB Revision