1987 MITSUBISHI MONTERO Fuel gauge

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

WIRING HARNESS - Interior and Frame 8-31
B-01 Dome light
B-02 Door switch (R.H.)
:::3 Rear speaker (R.H.) /&}License plate light (L.H.)
B-19 Back door lock actuator
B-20 Rear combination light (L.H.)
B-05 Defogger (-) B-21 Fuel gauge unit
B-06 Back door wiring harness and license plate light wiring B-22 Rear side marker light (L.H.)
harness combination
B-07 Rear wiper motor
B-08 Rear washer motor
B-09 Defogger (+)
B-l 0 Back door wiring harness and defogger cable (+)
combination
B-l 1 Rear side marker light (R.H.)
B-12 Frame wiring harness and back door wiring harness
B-13)combination B-23 Front wiring harness and frame wiring harness
;:g combination
E$ Rear speaker (L.H.)
:::g> Door switch (L.H.)
B-30 Power window main switch
B-31 Power window motor (L.H.)
B-14 Rear combination light (R.H.)
&z}License plate light (R.H.) B-32 Power window motor (R.H.)
B-33 Power window sub switch
Remark
The mark + shows the reference mounting position of wiring
harness.
STB Revision

WIRING HAFNESS - Meter Circuit 8-53
O&y-ssure
[Eal
* - -,,- - - - -
YB
> El Oil pressure
gauge unit
ElxQ YR B BR YR
I.+
A-20
A-06 A-03
4WD Ei
indicator switch
A-07 A-04 I r-
’ fs A
I I
I
E
1 ,’
-I T
-- m-w
I ? I
I I ’
k-1 1 I
.- -
I
I ' 1
I I
I I I I 4
0.85-B Jo
cigarette lighter
[Refer to P.8-621 Brake fluid
level sensor
Parking brake
switch
L, I I 1 B-23
-- I , I I I
I !
Fuel gauge
unit
Water
temperature
gauge unit
37W617
les with combinatior
(2) %?zgdeash and dot line (- -) indicates vehicles wit1
automatic free-wheeling hub indicator.
(3) For information concerning the ground points (er
ample:n), refer to P.8-7.
(4) The symbols@,@, etc. indicate that the wiring i
connected (using the same numerical symbol) tl
Combination gauge the facing page.
(In other words,Oon the right page is connecter
to@on the left page.)
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
1 STB Revision

WIRING HARNESS - Centralized Junction
Multi-purpose Fuse
Power supply circuit Fuse No. Rated
capacity A Applicable circuits
Battery 1 20
Clock, Dome light, Hazard warning flashers
Headlight relay 2 10 Tail lights, License plate lights, Illumination lights, Headlight
washer relay, Position lights
__-
Ignition switch (IG) 3 10 Heater relay, Seat belt warning timer, Turn-signal lights,
Alternator, Seat belt switches, Power window relay, Fuel and
water temperature gauges, Oil pressure gauge, Voltage meter,
Indicator and warning lights, Inhibitor switch, Automatic
free-wheeling hub indicator control unit
4
IO Back-up lights, Auto choke relay, OD-OFF relay
__-
5 15 Rear window defogger
Battery 6 20 Heater, Back door lock
7 15 Key-reminder switch, Stop lights, Buzzer
Ignition switch (ACC) 8 15 Windshield wipers and washer, Headlight washer relay,
Intermittent wiper relay, Horn
9 10 Rear window wiper and washer
10 15 Cigarette lighter, Radio, Tape player, Clock (ACC), Spare terminal,
Air conditioner relay

METERS AND GAUGES-Specifications
METERS AND GAUGES
8-123
SPECIFICATIONS
GENERAL SPECIFICATIONS
METERS AND GAUGES NOEHB-
Items
Speedometer
Type
Tachometer
Type
Detection source
Fuel gauge
Type
Fuel gauge unit
Type
Water temperature gauge
Type
Water temperature gauge unit
Type
Oil pressure gauge
Type
Oil pressure gauge unit
Type
Inclinometer
Type
Damping system
Voltage meter
Type Specifications
Electromagnetic type
Pulse type
Ignition coil
Bimetal type (constant-voltage relay incorporated for 7V)
Variable resistance type
Bimetal type (7V operation)
Thermistor type
Bimetal type
Bimetal type
Gravity type
Oil-filled system
Bimetal type
INDICATOR AND WARNING LIGHTS
NOEHC-B
Items Specifications
Turn signal indicator lights
W 1.4 (74)
High beam indicator light W 1.4 (74)
Door-ajar warning light W 1.4 (74)
Fasten seat belt indicator light W 1.4 (74)
Brake warning light W 1.4 (74)
Charging warning light W 1.4 (74)
4WD indicator light W 1.4 (74)
EGR warning light W 1.4 (74)
Oil pressure warning light W 1.4 (74)
A/T oil temperature warning light
W 1.4 (74)
Overdrive indicator light
W 1.4 (74)
Free-wheeling hub indicator light W 1.4 (74)
NOTE
The values in parentheses denote SAE grade numbers.
1 STB Revision ”

8-124
BUZZER METERS AND
GAUGES - Specifications
Items
Range of voltage used V
While buzzing (Terminal voltage at 13 V)
Sound pressure dB
Fundamental frequency Hz IO-16
53-7
goo* 150 Specifications
SERVICE SPECIFICATIONS
Items Specifications
Standard values
Speedometer indication error
Meter with “km/h” indication km/h
20 km/h f4
-1
40 km/h +4
0
80 km/h +5
0
120 km/h +5.5
+0.5
Meter with “mph” indication
mph
10 mph +- 1.5
25 mph + 1.5
50 mph +I.5
75 mph k 1.5
Tachometer indication error r/min
1,000 r/min *IO0
3,000 r/min +150
5,000 r/min f 250
Fuel gauge resistance value R
Between terminals 1 (power supply) and 2 (fuel gauge unit) 23-27
Between terminals 2 (fuel gauge unit) and 3 (ground) 122-l 48
Between terminals 1 (power supply) and 3 (ground) 100-l 20
Fule gauge unit resistance value R
Float point “F” 14.9-19.1
Float point “E” 113.5-l 26.5
Fuel gauge unit float position mm (in.)
Float point “F” 29.7-34.7 (1.169-l .366)
Float point “E” 183.8-185.8(7.236-7.315)
Water temperature gauge resistance value R
Between terminals 1 (power supply) and 2 (water 50-60
temperature gauge unit)
Water temperature gauge unit 90.5-I 17.5
resistance value R [at 70°C (158”F)l
Oil pressure gauge resistance value 1R 45-55
Voltage meter indication error V
IOV to.5
16V k 0.5
( ST6 Revision
-7

METERS AND GAUGES-Specifications /Troubleshooting 8425
TORQUE SPECIFICATIONS
Items Nm ft.lbs.
Water temperature gauge unit 8-10 6-7
SEALANTS AND ADHESIVES
Items
Water temperature gauge unit threaded portion Specified sealants and adhesives
3M nut locking No. 4171 or equivalent Quantity
As required
TROUBLESHOOTING
TACHOMETER NOBHH-
Inspection items
Symptom
The tachometer fails to operate
I The tachometer pointer is faulty
NOTE
Number in circle indicates inspection sequence.
FUEL GAUGE
Inspection items
Symptom
The fuel gauge fails to operate
The fuel gauge pointer is faulty
NOTE
Number in circle indicates inspection sequence.
1 STB Revision

METERS AND GAUGES - Circuit Diagram 8-129
011 pressure
switch YB
H I
>
A-52
Oil pressure
gauge unit
(
A-52
UY
>
-0.85-B
r.., !
YB
A-20 A-06 A-03
YR mYR YR,RL RL 4WD El B indicator switch
-- L7 I I 1 8-23
I I I I I
I 1 !
Fuel 1 1 gauge
unit
L
WL/B
YL
g-- y
1
I
I I I I I I LY)T~ OD OFF switch
1 1 I
I ' ; [Refer to P.8-431 I I
I . . I
'4 8.
Combination gauge
Wiring color code
6: Black Br: Brown G: Green Gr: Gray
LI: Light blue 0: Orange P: Pink
R: Red
Y Water
temperature
gauge unit
Remarks
(I) The broken line indicates vehicles with com-
bination gauge.
(2) The dash and dot line (-.-) indicates vehicles
with automatic free-wheeling hub indicator.
(3) For information concerning the ground points
(example: 0 ). refer to P.8-7.
(4) The symbols @I,@, 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.)
L: Blue
Y: Yellow Lg: Light green
W: White
/ STB Revision