ISUZU TROOPER 1998 Service Repair Manual

8DÐ458 WIRING SYSTEM
6-2 Even When The Tank Is Filled Up With Fuel, The Needle Does Not Reach ÒFÓ
·WHEN INSERTING AND PULLING OUT THE CONNECTOR
F-5 OF THE FUEL TANK UNIT SEVERAL TIMES, DOES
THE POINTER OF THE FUEL GAUGE STAY AT THE SAME
POSITION?
YES
·
·
·DISCONNECT THE CONNECTOR OF THE FUEL TANK UNIT
CONNECT THE FUEL TANK UNIT HARNESS SIDE
CONNECTOR 1 F-5 AND 2 F-5 WITH A LEAD WIRE
WHEN THE STARTER SW IS TURNED ON, DOES THE
NEEDLE OVERSHOOT TO “F” AFTER ABOUT 5 MINUTES?
YES
REPAIR A POOR CONNECTION AT THE CONNECTOR
OF THE FUEL TANK UNIT
NO
NO
REPLACE THE METER ASSEMBLY·
·REMOVE THE FUEL TANK UNIT
DOES THE FLOAT ARM OPERATE SMOOTHLY?
YES
·IS THE RESISTENCE
VALUE OF THE FUEL TANK
UNIT NORMAL?
NO
REPLACE THE FUEL
TANK UNIT

WIRING SYSTEM 8DÐ459
6-3 Even When The Tank Is Not Full of Fuel, The Needle Overshoots (Or Goes Up To ÒFÓ)
·
·DISCONNECT THE CONNECTOR OF THE FUEL TANK
UNIT
WHEN THE STARTER SW IS TURNED ON, DOES THE
NEEDLE STILL POINT TO “F”?
YES
·IS THE CIRCUIT BETWEEN THE FUEL TANK UNIT AND THE
FUEL GAUGE NORMAL?
NO
YES
·ARE THE RESISTANCE VALUES OF THE
FUEL TANK UNIT AT “E” AND “F” POINTS
NORMAL?
YESNO
REPAIR A SHORT CIRCUIT
IN THE CIRCUIT
NO
REPLACE THE FUEL TANK UNIT
·
·REMOVE THE FUEL TANK UNIT
DOES THE FLOAT ARM OPERATE SMOOTHLY?
REPLACE THE METER
ASSEMBLY

8DÐ460 WIRING SYSTEM
7. Warning/Indicator Light
7-1 When The Parkng Brake Lever Is Pulled, The Indicator Light Does Not Light Up
·
·
·DISCONNECT THE PARKING BRAKE SWITCH CONNECTOR
CONNECT THE HARNESS SIDE CONNECTOR TO THE
GROUND
WHEN THE STARTER SWITCH IS TURNED ON, DOES THE
INDICATOR LIGHT LIGHT UP?
YES
·IS THE PARKING BRAKE SWITCH INSTALLED
TO THE CORRECT POSITION?
NO
·DOES THE INDICATOR LIGHT HAVE A BURNED OUT
BULB, OR IS THE SOCKET POORLY CONNECTED?
YES
REPLACE THE METER
ASSEMBLY
NO
REPLACE THE BULB OR REPAIR
THE POOR CONNECTION AT THE
SOCKET
YES
·WHEN THE PARKING BRAKE IS
OPERATED, IS THERE CONTINUITY
BETWEEN THE SWITCH CONNECTOR
1 B-27 AND GROUND?
NO
ADJUST THE INSTALLATION POSITION
NO
REPAIR OR REPLACE THE PARKING BRAKE SWITCH

WIRING SYSTEM 8DÐ461
7-2 Even When The Parking Brake Lever Is Released, The Indicator Light Does Not Go Off
·IS THE PARKING BRAKE SWITCH INSTALLED TO
THE CORRECT POSITION, AND DOES IT OPERATE
NORMALLY?
YES
·WHEN THE PARKING BRAKE SWITCH CONNECTOR
B-27 DISCONNECTED, DOES THE INDICATOR
LIGHT GO OFF?ADJUST THE SWITCH INSTALLATION POSITION,
OR REPAIR OR REPLACE THE SWITCH
NO
NO
·IS THE BRAKE FLUID SUFFICIENT?
YES
·IS THE BRAKE FLUID
SWITCH NORMAL?
NO
REPLENISH THE BRAKE
FLUID
YESNO
REPLACE THE BRAKE
FLUID TANK
REPAIR A SHORT CIRCUIT
BETWEEN THE PARKING
BRAKE SWITCH CONNECTOR
1 B-27 AND 10 I-10 , OR
THE BRAKE FLUID SWITCH
CONNECTORS 2 C-15
AND 10 I-10 , OR VACCUM
SWITCH CONNECTOR 1 C-68
AND 10 I-10
YES
REPLACE THE METER ASSEMBLY
IS THE VACCUM
SWITCH NORMAL?
YESNO
REPLACE THE
VACCUM SWITCH
·

8DÐ462 WIRING SYSTEM
7-3 While The Engine Is Operating, The Oil Pressure Warning Light Does Not Go Off
·
IS THE ENGINE OIL PRESSURE NORMAL?
YES
·WITH THE OIL PRESSURE SWITCH CONNECTOR
E-1 OR E-2 DISCONNECTED, DOES THE
WARNING LIGHT GO OFF?
YES
REFER TO THE “ENGINE” SECTION
NO
REPAIR A SHORT CIRCUIT BETWEEN 1 E-1
OR 2 E-12 AND THE METER
NO
·WHILE THE ENGINE IS OPERATING, IS THERE
CONTINUITY BETWEEN THE OIL PRESSURE SWITCH
CONNECTOR 1 E-1 AND THE BODY GROUND?
YES
REPLACE THE METER ASSEMBLYREPLACE THE OIL PRESSURE SWITCH
NO
7-4 Even When The Fuel Tank Is Full With Fuel, The Low Fuel Warning Light Lights Up
·WHEN THE ALARM & RELAY CONTROL UNIT
CONNECTOR B-7 IS DISCONNECTED,
DOES THE WARNING LIGHT GO OFF?
YES
·IS THE FUEL TANK UNIT NORMAL?
YES
REPLACE THE METER ASSEMBLY
REPAIR A SHORT CIRCUIT BETWEEN THE ALARM
& RELAY CONTROL UNIT HARNESS SIDE
CONNECTOR 6 B-7 AND 18 I-10 (METER)
NO
REPLACE THE FUEL TANK UNIT
NO

WIRING SYSTEM 8DÐ463
7-5 Even When The Fuel Tank Is Empty, The Low Fuel Warning Light Does Not Light Up
·DOES THE WARNING LIGHT HAVE A BURNED OUT
BULB, OR IS THE SOCKET POORLY CONNECTED?
·
·DISCONNECT THE ALARM &
RELAY CONTROL UNIT
CONNECTOR B-7
WHEN CONNECT THE
HARNESS SIDE CONNECTOR
6 B-7 WITH THE GROUND,
DOES THE WARNING LIGHT
LIGHT UP?
YES
·IS THE FUEL TANK UNIT NORMAL?REPLACE THE BULB, OR REPAIR A POOR
CONNECTION AT THE SOCKET
NO
REPLACE THE FUEL TANK
UNIT
NOYES
REPLACE THE ALARM &
RELAY CONTROL UNITREPAIR A POOR
CONNECTION AT THE
CONNECTORS OR AN OPEN
CIRCUIT BETWEEN 6 B-6
AND THE METER
NOYES

8D Ð 464 WIRING SYSTEM
A/T Shift Indicator
General Description
The circuit consists of mode switch, A/T shift indica-
tor control unit and A/T shift indicator (meter).
A/T shift indicator control unit controls to illuminate
A/T shift indicator light according to signals from
mode switch.

WIRING SYSTEM 8D Ð 465
Circuit Diagram (RHD)-1
D08RW639
3.0
B/Y
0.85
R/B
0.85
G/R 0.85
R/BC-3 10A
TURN,BACKSTARTER SW
(IG1)
STARTER SW
(ST)
12
C-93
13
C-931
C-93
H-717
H-41 TAIL RELAY
(4)
PCM
(E12)PCM
(E7)PCM
(F2)PCM
(F3)BACK UP
LIGHTSTARTER
RELAY
(5) 1
H-531 0.5
R/B
0.75
R/B
0.5
L/W0.5
L/Y0.5
L/B
0.5
L/W0.5
L/Y0.5
L/B 0.5
L/W0.5
L/Y0.5
L/B0.5
Y/G0.75
R/L1.25
W/L 1.25
W/R
MODE
SW
M-25
5 6
8H-11M-25
A/T SHIFT INDICATOR CONTROL UNIT
2
C-93H-532M-25
6
3
C-93H-533M-25
7
H-534M-25
2
H-117M-25
3
H-1015M-254M-25
1H-1016

8D Ð 466 WIRING SYSTEM
Circuit Diagram (RHD)-2
D08RW650
0.5
R/G
0.5
R/G
A/T
SHIFT
INDICATOR
(METER)A/T SHIFT INDICATOR CONTROL UNIT
C-93
11H-24100.5
R/L
0.5
R/L
C-93
10H-2420.5
Y/V
0.5
Y/V
C-93
9H-2470.5
Y
0.5
Y
C-93
8H-9210.5
P/W
0.5
P/W
C-93
7H-980.5
P/B
0.5
P/B
C-93
6H-9180.5
Y/G
0.5
Y/G
C-93
5H-2440.5
YB/R
0.5
B/L
0.5
YB/R
C-93
4H-2414
1.25
B/L
1.0
B/L
C-93
14E-30
COMMON CHAMBER
11
I-103
I-1012
I-910
I-1013
I-914
I-102
12
PRND 3 2 L
I-914
I-10 (W/T.O.D.)
13
I-913
D3 2
I-10I-9
14
H-5

WIRING SYSTEM 8D Ð 467
Parts Location (RHD)
Legend
(1) I-10
(2) I-9
(3) C-93
(4) H-7, H-8, H-9, H-24
(5) Mode Switch(6) H-5
(7) H-10, H-11, H-53
(8) E-30
(9) H-41
(10) Relay and Fuse Box
(11) Fuse Box
D08RWA10
5
3
4
67
9
10
11
12
8