heater MITSUBISHI MONTERO 1987 1.G Workshop Manual

Service Manual
MONTERO
1987 : Volume 2
FOREWORD
This Service Manual has been prepared with the
latest service information available at the time of
publication. It is subdivided into various group
categories and each section contains diagnosis,
disassembly, repair, and installation procedures
along with complete specifications and tightening
references. Use of this manual will aid in properly
performing any servicing necessary to maintain or
restore the high levels of performance and reliability
designed into these outstanding vehicles.
WE SUPPORT
VOLUNTARY TECHNICIAN
CERTIFICATION THROUGH
MITSUBISHI MOTOR SALES OF AMERICA. Inc.
Mitsubishi Motors corporation reserves the right to make changes in
design or to make additions to or improvements in its products without
imposing any obligations upon itself to install them on its products
previously manufactured.
I
GROUP/SECTION INDEX ‘kme-.
INTRODUCTION ..............................
Electrical ...........................................
Electrical System Parts
Location .........................................
Relays, Control Units, Sensors,
Fuses, Groundings
Inspection of Harness
Connector ......................................
Wiring Harness .............................
Charging System ..........................
Starting System ............................
Ignition System .............................
Meters and Gauges ......................
Lighting System .............................
Wiper and Washer System ..........
Horn ...............................................
Accessory ......................................
Audio System ................................
Back Door Window Defogger ......
Automatic Free-wheeling Hub
Indicator System ..........................
Heaters and Air-conditioning .........
Heaters ..........................................
Air-conditioning ............................
**, For Engine Chassis & Body refer to
0 1986 Mitsubishi Motors Corporation Printed in Japan

8-1
ELECTRICAL
CONTENTS
NOBAA-
ACCESSORY ......................................................
188
Cigarette Lighter ............................................
,190
Clock ...............................................................
,191
AUDIO SYSTEM ................................................
.192
AUTOMATIC FREE-WHEELING HUB
INDICATOR SYSTEM ........................................
208
Automatic Free-wheeling Hub
Indicator Control Unit
..................................... ,216
Pulse Generator ..............................................
215
BACK DOOR WINDOW DEFOGGER
................ .203
Defogger switch ............................................
,206
Printed Heater Lines
...................................... ,207
CHARGING SYSTEM .........................................
71
Alternator ........................................................
83
Service Adjustment Procedures
..................... 77
Battery Charging ........................................
82
Inspection of Battery ..................................
81
Output Current Test ...................................
78
Regulated Voltage Test ..............................
79
Voltage Drop Test of Alternator Output
Wire ............................................................
77
ELECTRICAL SYSTEM PARTS LOCATION
...... 2
Diode ...............................................................
5
Fusible Link and Fuse
..................................... 6
Grounding .......................................................
7
Relay and Control Unit ....................................
2
Sensor .............................................................
4
HORN ..................................................................
184
Horn Switch
.................................................... 187
IGNITION SYSTEM ............................................
105
Ignition Switch
................................................ 122
Ignition System ...............................................
1 14
Service Adjustment Procedures
.................... .l 1 1
Checking Ignition System
..........................
11 1
Checking Ignition Timing
...........................
11 1
Spark Plug Cable Test
................................
1 12
Spark Plug Test
.......................................... 1 12 INSPECTION OF HARNESS CONNECTOR ...... 9
Check for Improper Engagement of
Terminal .......................................................... 9
Continuity and Voltage Test for Connector .... 9
Engaging and Disengaging of Connector
Terminal ..........................................................
9
LIGHTING SYSTEM ........................................... 143
Column Switch
................................ .
.............. .I59
Dimmer Control Switch
................................. .I62
Hazard Warning Switch
................................. .I61
Headlight ........................................................ ,158
Service Adjustment Procedures
.................... .I57
Headlight Aiming .......................................
157
METERS AND GAUGES .................................... 123
Service Adjustment Procedures
.................... .I30
Fuel Gauge Simple Test ................................. .I31
Fuel Gauge Unit Inspection ........................... .I31
Oil Pressure Gauge Simple Test
.................... .I32
Oil Pressure Gauge Unit Simple Test
............ ,132
Speedometer Inspection
............................... .I30
Tachometer Inspection .................................. ,130
Voltage Meter Simple Test
............................ .I33
Water Temperature Gauge Simple Test
....... ..I3 1
Water Temperature Gauge Unit Inspection
. ..I3 2
STARTING SYSTEM .......................................... 91
Starter Motor ............ ....................................... 97
WIPER AND WASHER SYSTEM
....................... .163
WIRING HARNESS ............................................ 13
Centralized Junction ....................................... 69
Circuit Diagram ............................................... 34
Configuration Diagram .................................... 27
How to Read Wiring Diagrams ....................... 20
Troubleshooting .............................................. 13

8-2 ELECTRICAL SYSTEM PARTS LOCATION - Relay and Control Unit
ELECTRICAL SYSTEM IPARTS LOCATION NOIBAB-A
RELAY AND CONTROL UNIT
16W722
n 17
hub indicator control unit A A Automatic free-wheeling 2
Blower
assembiy& x v/i 16W152B Items Symbol
--
Air conditioner relay D
--
Auto choke relay G
--
Automatic free-wheeling hub indicator control
A
unit
Condenser blower motor relay H
Feed back carburetor control unit C
Hazard warning flasher unit F
Headlight washer relay F
Heater relay E
Intermittent wiper relay F
~___
Light control relay I
~___
Over drive relay F
Power window relay F
Seat belt warning timer B
Turn-signal flasher unit F
carburetor
control unit
Air conditioner relay
d--- I- Jr Evaporator E
1 .STB Re\iision

8-32 WIRING HARNESS - Instrument Panel
3 INSTRUMENT PANEL
Connector symbol
C
C-65 c-04
C-06
C-64
C-63
C-61
CL57 C-b6 C!55 d54 c!5
Remarks
For information concerning the ground points (example:
q ),
refer to P.8-7.
C-01 Back door lock switch
C-02 Defogger switch
C-03 Kev reminder and seat belt
warning buzzer
c-04
pi;’ Combination meter
C-08 Diode
C-09 Rear wiper and washer switch
r&~}Oil pressure gauge
C-12 f;hybination gauge illumination
C-l 3 Blower switch
C-14 Combination gauge wiring
harness and front wiring harness
combination
C-15 F;hybination gauge illumination
C,::F}Voltage meter C-l 8 Heater relay
C-l 9 Air conditioner wiring harness
and front wiring harness
combination
E:$)}Air conditioner relay C-31 Blower motor resistor
C-32 Dedicated fuse (Air conditioner
circuit)
C-33 Air conditioner switch
C-34 yl;Jer control lonob illumination
$:;;I Thermostat
$:;;I Feed back carburetor control unit
C-26 Front speaker (R.H.)
C-27 Front wiring harness and roof
wiring harness combination
C-28 Automatic free-wheeling hub
indicator control unit
C-29 Seat belt warning timer
C-30 Front wiring harness and door
wiring harness (R.H.)
combination c-35
C-36
c-37
C-38
c-39
c40
“3’ ‘. Blower switch
Clock
Heater control panel illumination
light
Ashtray illumination light
Air conditioner switch
illumination light
Front wiring harness and center
panel wiring harness
combination
[ STB Revision

8-38 WIRING HARNESS - Feed Back Carburetor Circuit
4 FEED BACK CARBURETOR CIRCUIT
Main
fusible ’ m
Battery link A-02 j
-1.25-B- i Sub fusible link
I L uA-2i
I:
a h
W r
efl
EEI W BW
Ignition switch
A-28
qi
--I
zix
c:
-26c-1
ziE2
BW ".
I w 2-BW wQ
To alternator
[Refer to P.8.37.1 1 I
r Feed back
solenoid valve
c YG
1.25-BW"'
I
I yL
,0
P Slow cut
solenoid valve YL
1.25-BW*'
Auto choke
heater
-hrottle position
iensor
A-24 1
Carburetor assembly
Remarks
(1) For information concerning the ground points (example:
0). refer to P.8-7.
(2) The symbols 0, 0 etc. indicate that the wiring is con-
nected (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.)
STB Revision

WIRING HARNESS - Heater Circuit 8-55
14 HEATER CIRCUIT
A’
Battery
0
(Ignition switch)
L
l!zEl *I BI
lonition switch
Multi-purpose
fuse
To turn signal flasher unit4 0.85-RL
[ [Refer to P.8-49.1
n
H
M2
Ml
bFF - -
P -
-
- -
I
Blower switch
Remark 37W614
For information concerning the ground points (example: 0 ),
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 Blower motor
resistor
LB LI
El3 LR LW
Blower
motor
M
!! T i

C-18
I
Heater relay
8 L
El LR LR
*1 *2
STB Revision

8-56 WIRING HARNESS - Air Conditioner Circuit
15 AIR CONDITIONER CIRCUIT
Main
fusible m
I;..,, 1 Ignition switch
Sub fusible link
(Fuse B)
+2 0.85-R
I I
(lonition switch)
I I ,!..I ’ ’
T
3-LRwQ
To turn signal flasher unit ~ 0.85-RL [Refer to P.849.1 J
L
I
I , ,0.85-LW
FA2 Ml
bFF To cigarette
lighter
[Refer to P.8-62.1
I f Y
Blower
motor
8 I
M
4JY motor
T-
Ii
1
Blower switch lower 1C-18 l!!!a Heater relay
0.85-WB@
Wiring color code
B: Black Br: Brown
G: Green
Gr: Gray L: Blue Lg: Light green
LI: Light blue
0: Orange P: Pink I?: Red
Y: Yellow W: White -
STB Revision
II/

8-62 WIRING HARNESS - Cigarette Lighter / Clock Circuit
18 CIGARETTE LIGHTER / CLOCK CIRCUIT
Sub fusible link Ignition switch
r-l E-f? ‘) n
-u yn;in fusible
7-R \*I
To light control relay
[Refer to P.8-461
To radio
GW [Refer to P&601-, 3F- Pm
To hazard flasher unit4 I .LJ- G
[Refer to P.8-491
II I Multi-purpose fuse
illumination light
To heater control
illumination light
[Refer to P.8-511
Clock
CT
0: 1
h J
6
Jc-36
To combination mete& BY
[Refer to P.8-521 1
Wiring color code
B: Black LI: Light blue To dimmer control switch BY
Br: Brown 0: Orange [Refer to P.8-511 M
G: Green P: Pink
-
Gr: Gray H: Red
L: Blue Y: Yellow
Lg: Light green W: White Remark
For information concerning the ground points (example: 0 1,
refer to P.8-‘7.

WIRING HARNESS - Back Door Lock Circuit
23 BACK DOOR LOCK CIRCUIT
Battery _ Sub fusible link
$’
m 5 Multi-purpose ’
fuse
)
A 1.25F-G -1.25-G
0 2-LR -To heater relay
[Refer to P.8-551
1.25F-R 1.25-R
2-B -To column switch
B-l 2 [Refer to P.8-511
cza
I I
xx 0
I
. .
77
m B-24 [
cLL3
ALA
CVN
. .
77
Back door
lock actuator
Remark
37W602
For information concerning the ground points (example: q ),
Wiring color code refer to P.8-7.
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

WIRING HARNESS - Centralized Junction
CENTRALIZED JUNCTION
Main Fusible Link
896!
Circuit
Main circuit
Cable color Black
Fusible link size mm’ (ir?.) 1.25 (.0019)
Permissible continuous current A 40
Fusing current A 190
Sub Fusible Link
Item Circuit
Cable color
Fusible link size mm7 (in.2)
Permissible continuous current A
Fusing current A
Dedicated Fuse Lighting circuit
Green
0.5(.0008)
27
100 Alternator circuit Feed back carburetor
control circuit
Stop light, door lock
and heater circuit
Red
0.85(.0013)
34
150 Ignition circuit Power window
circuit
Green Green-
0.5(.0008) 0.5(.0008)
27 27
100 100
Upper beam indicator circuit / Air conditioner cixit