1998 ISUZU TROOPER fuel

8DÐ118 WIRING SYSTEM
QOS and EGR System (4JG2)
General Description
The circuit consists of the starter switch, QOS/EGR
control unit, glow relay, charge relay, fuel cut
solenoid, dropping resistor, thermo sensor, glow
indicator light (meter), glow plug, vehicle speed
sensor, tacho sensor, throttle position sensor, EVRV
and VSV; EGR.
The engine coolant temperature at the time of the
engine start-up is sensed by the thermo sensor to
change the glow time so that the optimum starting
conditions can always be obtained.
The idling speed just after the engine start-up can
also be placed in the most suitable conditions in
accordance with the coolant temperature by the
operation of the delay timer.The indicator timer is activated upon the starter
switch turned to the ON position, and the indicator
light comes on for as much time as suitable for the
engine coolant temperature at the time of the
engine start-up.
EGR system controls the information of NOx by
returning a small amount of exhaust gas from the
intake manifold to the combustion chamber
through the EGR valve.

WIRING SYSTEM 8DÐ119
Circuit Diagram (RHD)-1
0.5
B
0.5
W/G 0.85
W/G0.5
B0.5
B/Y
0.5
B/Y 0.85
B/Y0.5
L/Y
0.5
L/Y
0.5
P/W0.85
B/O 0.85
B/O 0.85
B/O
0.3
P/W 0.85
B/Y 0.85
B/Y 0.85
B/Y3.0
B/Y
C-8 15A
ENGINE
CHARGE
RELAY
GLOW
INDICATOR
LIGHT
(METER)
FUEL CUT
SOLENOID
AMBIENT
THERMO
SW QWS
THERMO SW
(ENGINE)
0.85
W/L
QOS/EGR CONTROL UNIT
C-6618
C-669
C-665
C-6617
C-6620
C-6616
C-391
X-172
I-915
H-4112
H-914
X-173
X-175H-33
1
X-17
26
I-9 4
X-17
FENDER-RHSTARTER SW
(IG1)AC GENERATOR
(L)
C-10 10A
METER, GAUGEC-9 15A
FUEL CUT
A 19
H-153.0
W/G
0.5
W/R0.5
BR
0.5
BR
0.5
BR
0.5
LG/Y
0.5
G/B
0.5
G/W 0.5
W/RC-1 10A
STARTER
RELAY STARTER SW
(ST)
4
H-71
E-40
11H-4
2C-743.0
L/R
0.5
BR
0.5
BR
0.5
BRC-20 10A
AIR CON HEATER & A/C
RELAY(4)
16
H-26
0.5
LG/W
0.3
LG/W VEHICLE SPEED
SENSOR(3)
15
H-5 12
H-76
H-26
H-57
H-412H-47E-402 7
E-371H-7
B
C
CH-167
C-74
1
D08RW695

WIRING SYSTEM 8DÐ123
0.5
B
0.5
W/G 0.85
W/G0.5
B0.5
B/Y
0.5
B/Y 0.85
B/Y0.5
L/Y
0.5
L/Y
0.5
P/W0.85
B/O 0.85
B/O 0.85
B/O
0.3
P/W 0.85
B/Y 0.85
B/Y 0.85
B/Y3.0
B/Y
C-8 15A
ENGINE
CHARGE
RELAY
GLOW
INDICATOR
LIGHT
(METER)
FUEL CUT
SOLENOID
AMBIENT
THERMO
SW QWS
THERMO SW
(ENGINE)
0.85
W/L
QOS/EGR CONTROL UNIT
C-6618
C-669
C-665
C-6617
C-6620
C-6616
C-392
X-172
I-915
H-4112
H-241
X-173
X-175H-33
1
X-17
26
I-9 4
X-17
FENDER-RHSTARTER SW
(IG1)AC GENERATOR
(L)
C-10 10A
METER, GAUGEC-9 15A
FUEL CUT
A 3
H-133.0
W/G
0.5
W/R0.5
BR
0.5
BR
0.5
BR
0.5
LG/Y
0.5
G/B
0.5
G/W 0.5
W/RC-1 10A
STARTER
RELAY STARTER SW
(ST)
6
H-81
E-40
11H-4
2C-743.0
L/R
0.5
BR
0.5
BR
0.5
BRC-20 10A
AIR CON HEATER & A/C
RELAY(4)
14
H-26
0.5
LG/W
0.3
LG/W VEHICLE SPEED
SENSOR(3)
15
H-5 13
H-810
H-25
H-57
H-412H-47E-402 7
E-371H-8
B
C
CH-1617
C-74
1
D08RW984
Circuit Diagram (LHD)-1

8D – 410 WIRING SYSTEM
Meter and Warning/Indicator Light
General Description
The circuit consists of meter assembly vehicle speed
sensor, engine coolant temperature sensor, seat belt
switch, oil pressure switch, brake fluid switch, park-
ing brake switch and other some switches and sen-
sors.
Meter assembly contains speedometer, tachometer,
voltmeter, engine coolant temperature gauge, oil
pressure gauge, fuel gauge, warning/indicator light
and illumination light.

WIRING SYSTEM 8D – 411
Circuit Diagram (RHD 6V*1 W/O T.O.D)-1
%38
3
C-3910H-42
0.5
B/R0.5
B/R 0.5
B/R
B
DC
A
FENDER-RH
H-104M-10
2A
I 0.5
L/Y0.5
L/Y0.5
L/Y
1
M-109H-103H-9
0.5
LG/W0.5
LG/W
0.5
LG/W0.5
LG/W 0.5
LG/W0.5
R/W
SPEEDO-
METER
RESET
SWTACHOMETERENGINE
COOLANT
TEMPERATURE
GAUGEFUEL
GAUGEOIL
PRESSURE
GAUGE FUSE C-15
3
M-10125H-9
11H-10
VEHICLE
SPEED SENSOR
I-10
0.5
Y/B0.5
Y/B0.5
Y/B
1
E-191 4H-24
11H-6I-10
2
H-8
PCM
(D7)CRUISE CONTROL
UNIT(9)0.5
B/R
15
H-9
PCM
(C10)9I-9
0.5
Y/R
14H-2520I-10
ENGINE
COOLANT
TEMPERATURE
UNIT
0.5
Y/G0.5
Y/V0.5
Y/B
1E-217 19H-9
10H-6I-10
OIL
PRESSURE
UNIT
8
I-10METER
ODO/TRIP
METER

8D – 412 WIRING SYSTEM
Circuit Diagram (RHD 6V*1 W/O T.O.D)-2
%38
BCD
J
E
5 18 15105
2 25
4 21
163
5 1
19 156
VOLT
METERC-10 10A
METER, GAUGE
CHECK
TRANS.A/T OIL
TEMP.
18
C-39 H-16I-9
PCM
(A13)PCM
(A11)PCM
(A10)PCM
(A14)PCM
(A9)
0.5
V0.5
P/W0.5
P/G0.5
O/B0.5
O/L 0.85
B/PH-26
I-9 0.5
L/Y0.5
L/Y0.5
L/Y3.0
B/Y STARTER SW
(IG1)
0.3
Y/G
0.85
B/P
FENDER-RH
I-10
H-25I-9
H-9I-9
H-9I-9
H-9I-9
H-9I-9
H-24 FUEL MIL POWER WINTER
METER
MIL:MALFUNCTION INDICATOR LIGHT

WIRING SYSTEM 8D – 415
%38
Circuit Diagram (RHD 6VD1 W/O T.O.D)-5
I
J
0.3
Y/G 0.5
Y/R
0.5
Y/R
BODY-RR
ALARM&RELAY
CONTROL UNIT FUEL
TANK
UNIT
0.5
B
1.25
B 0.5
B/P0.3
Y/BR
0.3
Y/BR
0.3
Y/BR
7
17 144 1
12
B-66
B-7
DIMMER•
PASSING
SW FUSE F-4
0.85
R/Y 0.85
R/L
14 15 13
9 I-10 I-10 H-16
H-9 HIGH
BEAM
R-4F-5H-332
F-518H-46
13H-33F-5H-33H-46
0.5
Y/R
FUEL
TANK
UNIT
0.5
B/P0.3
Y/BR
0.3
Y/BR
179 4 1
19F-5H-332
F-57H-33 (SOUTH AFRICA)F-5H-33H-46

WIRING SYSTEM 8D – 417
%38
Circuit Diagram (RHD 6V*1 W/T.O.D)-1
3
C-3910H-42
0.5
B/R0.5
B/R 0.5
B/R
B
DC
A
FENDER-RH
H-104M-10
2A
I 0.5
L/Y0.5
L/Y0.5
L/Y
1
M-109H-103H-9
0.5
LG/W0.5
LG/W
0.5
LG/W0.5
LG/W 0.5
LG/W0.5
R/W
SPEEDO-
METER
RESET
SWTACHOMETERENGINE
COOLANT
TEMPERATURE
GAUGEFUEL
GAUGE FUSE C-15
3
M-10125H-9
11H-10
VEHICLE
SPEED SENSOR
I-10
0.5
Y/B0.5
Y/B0.5
Y/B
1
E-191 9H-24
11H-6I-10
2
H-8
PCM
(D7)CRUISE CONTROL
UNIT(9)0.5
B/R
15
H-9
PCM
(C10)9I-9
0.5
Y/R
14H-2520I-10
ENGINE
COOLANT
TEMPERATURE
UNIT
8
I-10
METER
ODO/TRIP
METER