ISUZU TROOPER 1998 Service Repair Manual

8D – 438 WIRING SYSTEM
D08RW916
Circuit Diagram (LHD 4JG2)-2
B
I
G
DE
H
6 1169 18
1 26
2 24
18 16
19 15 10
VOLT
METERC-10 10A
METER, GAUGE
ABS
22
C-39 H-16I-9
QOS/EGR
CONTROL
UNIT(5)SDM
(7)EHCU
(16)
0.3
Y/G0.5
P/W0.5
W/R0.5
Y 0.85
B/PH-25
I-9 0.5
L/Y0.5
L/Y0.5
L/Y3.0
B/Y STARTER SW
(IG1)
0.5
LB
0.85
B/P
FENDER-RH
I-9
H-9I-10
H-25I-9
H-24I-9
H-62I-10
H-16 OIL
PRESSUREFUEL GLOW AIR BAG
METER

WIRING SYSTEM 8D – 439
Circuit Diagram (LHD 4JG2)-3
D08RW914
HSEAT
BELT
SW
BODY-LHB-18
BODY-CTR
BODY-RH
B-2
2
11 0.3
L
0.5
L
2.0
B 2.0
B 2.0
B 0.5
BI-9
B-24 H-25
1
B-24
SEAT
BELT
B-262
KMJL
BRAKE EHCU:ELECTRONIC HYDRAULIC CONTROL UNIT
SEDIMENTER 4WDBRAKE
FLUID
SWPARKING
BRAKE
SW
18
22
4WD
CONTROL
UNIT(19)
FRT AXLE
SW(2)
4WD
SW(1) SDM
(20)0.5
LG
0.5
LG 0.5
LG 0.85
LGI-9
H-2523
20
2 0.5
V
0.3
V0.5
B/P
0.85
B/P
0.5
B0.5
B/P0.5
B/P I-9
H-9
H-674
1
3 17
215
1
FENDER-LH0.5
B/PI-9
H-9
C-15
C-16 C-15
FUEL
FILTER
SW
0.5
B1
2
FENDER-L HC-16 C-67
VACUUM
SW
1
C-68H-25
B-27
METER

8D – 440 WIRING SYSTEM
Circuit Diagram (LHD 4JG2)-4
D08RW917
JKM
6
5
CHAGE
RELAY
(1)ILLUMINAITON
CONTROLLER(3)TAIL RELAY
(4)TURN SIGNAL/CORNERING
LIGHT SW
BODY-RH 0.85
W/G
0.85
W/GI-9
H-168
0.5
R/G30
0.3
B 0.85
G/B 0.85
G/R0.85
P/B
2.0
B
2.0
B15
L
I-9H-48
B-21
19
2820
I-10 H-25
76
I-9 CHARGE METERTURN
-LHTURN
-RH ODO/
TRIP
METER
METER
I-9 I-9 H-16
H-25

WIRING SYSTEM 8D – 441
D08RW918
Circuit Diagram (LHD 4JG2)-5
F
I
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 10
12 I-10 I-10 H-16
H-16 HIGH
BEAM
R-4F-5H-332
F-518H-46
13H-33F-5H-33H-46

8D – 442 WIRING SYSTEM
D08RW919
Circuit Diagram (LHD 4JG2)-6
BODY-RH BODY-RH TAIL RELAY
(4)
(W/O SUN ROOF) STARTER SW
(ACC)
AMBIENT TEMPERATURE
SENSOR
0.5
B
2.0
B 2.0
B 2.0
B 0.5
P/G0.5
G/R0.5
G/R
0.5
O/G0.5
O/G3.0
L/B
0.5
P/G 0.5
P/L0.5
P/L
0.5
P/G 0.5
P/L0.85
B
4
H-21 4 6
H-21 H-21H-21
H-7
C-9L-5
5
8
H-212
20
H-711
2
C-91L-5
4 L-53
L-51 1
H-213
L-5
B-1 B-1
MULTI METER
C-11 10A
AUDIO(ACC), MIRROR

WIRING SYSTEM 8D – 443
Parts Location (LHD W/O T.O.D 6V*1)
Legend
(1) L-5
(2) I-10
(3) I-9
(4) F-5
(5) H-7, H-8, H-9, H-24, H-25, H-26, H-62
(6) H-46
(7) B-26
(8) B-62
(9) Fuse Box
(10) C-15
(11) B-18
(12) C-16
(13) H-33(14) H-6
(15) E-2
(16) H-10
(17) E-1
(18) C-9
(19) E-19
(20) B-6, B-7 (Alarm and Relay Control Unit)
(21) H-42
(22) Relay and Fuse Box
(23) B-1, B-2
(24) H-16, H-21, H-48
(25) C-39
(26) M-10
(27) B-27
D08RW930
123
4
5
6
7
8
9
10
11
12
13
141516
1718
19
20
21
22
23
24
25
26
27

8D – 444 WIRING SYSTEM
Parts Location (LHD 4JG2)
Legend
(1) L-5
(2) I-10
(3) I-9
(4) F-5
(5) B-27
(6) C-15
(7) H-33
(8) R-4
(9) H-7, H-9, H-24, H-25, H-62
(10) B-26
(11) C-16
(12) H-46
(13) Fuse Box
(14) B-18(15) C-68
(16) B-62
(17) H-4, H-5
(18) C-67
(19) E-36
(20) C-9
(21) E-19
(22) B-6, B-7 (Alarm and Relay Control Unit)
(23) B-1, B-2
(24) Relay and Fuse Box
(25) C-39
(26) H-12, H-14, H-16, H-21, H-48
(27) E-2
(28) E-20
D08RW897
123
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
2021
22
23
24
25
26
27
28

WIRING SYSTEM 8DÐ445
Diagnosis
1. Speedometer
1-1. Speedometer and Odometer Do Not Function
·DOES THE CAR SPEED SENSOR OUTPUT IN
4 PULSES/1 ROTATION?
YES
·ARE THE CIRCUITS BETWEEN THE VEHICLE SPEED
SENSOR AND THE METER, AND THE FUSE C-10
(10 A) AND THE GROUND NORMAL?
YES
REPLACE THE VEHICLE SPEED SENSOR
NO
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT IN THE CIRCUIT
NO
REPLACE THE METER ASSEMBLY
1-2. Speedometer Does Not Function (Odometer is Normal)
REPLACE THE METER ASSEMBLY
1-3. Odometer Does Not Function (Speedometer is Normal)
REPLACE THE METER ASSEMBLY

8DÐ446 WIRING SYSTEM
1-4. Speedometer Needle Fluctuations (May Be Wide Fluctuation)
·DOES THE VEHICLE SPEED SENSOR OUTPUT
NORMALLY?
YES
THE OSCILLOSCOPE WAVEFORM IS DEFORMEDREPLACE THE METER ASSEMBLY
REPLACE THE VEHICLE SPEED SENSOR OR REPAIR
A POOR CONNECTION AT THE CONNECTORS IN THE
CIRCUIT OR A FAILURE IN THE CABLE HARNESS
NO
1-5. Speedometer Needle Jumps Erratically
·DOES THE VEHICLE SPEED SENSOR OUTPUT
NORMALLY?
YES
AN ABNORMAL PERIODIC WAVEFORM IS OUTPUT BY
OSCILLOSCOPEREPLACE THE METER ASSEMBLY
REPLACE THE VEHICLE SPEED SENSOR, OR REPAIR
A POOR CONNECTION AT THE CONNECTORS IN THE
CIRCUIT OR A FAILURE IN THE CABLE HARNESS
NO

WIRING SYSTEM 8DÐ447
I-9I-10
Inspection of a waveform by oscilloscope
1. Connect a resistance of 1.3 to 5k ohm (1.4W or more) between the harness side connectors 15 I-9
and 5 I-10 (w/o TOD) or 26 I-9 and 5 I-10
2.
3.
4.Install a speedometer tester.
Turn on the starter SW.
Check the waveform at the time when the car speed is at 60 km/h.
Normal waveform
OV
23.6m sec.
2V or lessApproximate battery voltage
1234567 891011121314
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 301234
13 145678910
15 16 17 18 19 20
111221 22
2. Tachometer
2-1. Tachometer Does Not Function
·IS THE PULSE INPUT NORMAL?
YES
REPLACE THE PCM, ECM OR REPAIR A POOR
CONNECTION AT THE CONNECTORS IN THE CIRCUIT
OR A FAILURE IN THE CABLE HARNESS
NO
REPLACE THE METER ASSEMBLY