ECU ISUZU TROOPER 1995 Manual Online

8-310 CHASSIS ELECTRICAL
6-3 WHEN THE TANK IS NOT FULL OF FUEL, THE NEEDLE
OVERSHOOTS (OR GOES UP TO "F")
• DISCONNECT THE CONNECTOR OF THE FUEL TANK UNIT
•
WHEN THE STARTER SW IS TURNED ON, DOES THE NEEDLE STILL POINT TO "F"7
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YES I NO I
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• IS THE CIRCUIT BETWEEN THE FUEL TANK UNIT AND THE • REMOVE THE FUEL TANK UNIT FUEL GAUGE NORMAL?
• DOES THE FLOAT ARM OPERATE SMOOTHLY?
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YES I NO I YES J
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• IS THE PRINTED CIRCUIT REPAIR A SHORT CIRCUIT • ARE THE RESISTANCE VALUES OF THE OF THE METER ASSEMBLY IN THE CIRCUIT FUEL TANK UNIT AT "E" AND "F" POINTS GROUNDED SECURELY? NORMAL?
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YES I NO I NO I
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CHECK THE FUEL GAUGE, REPAIR OR REPLACE THE REPLACE THE FUEL TANK UNIT I AND REPLACE IT IF PRINTED CIRCUIT BOARD
NECESSARY
•

3. Meter
• Remove four screws securing the meter at the
back side. (Fig.
8-351)
• Lift the meter carefully to remove it. (Fig. 8-
352).
0
q;J"' 0
0 0 0,
0 0
0 I
Fig. 8-351
Fig. 8-352
E) INSTALLATION
00
0
To install, follow the removal steps in the reverse
order.
CHASSIS ELECTRICAL 8-321
TACHOMETER (FIG. 8-353)
The tachometer is made up of the cross coil type
ammeter (movement) that displays indications, and
the drive circuit (printed board)
that makes exchange
between the
pulse signals and the current.
Fig.
8-353
(1!1 ON-VEHICLE SERVICE
1. Set up the tune-up tester to the engine.
2. Start the engine and compare the readings dis­
played by the tachometer and the tester.
When the difference between these
two readings
differs
largely from the specified value, replace it
with a correct one.
(rpm)
Tester
display speed Meter
display permissible level
750 690-770
1000
900-1060
2000 1820-2090
3000 2820-3120
4000 3820-4180
5000 4820-5180
6000 5820-6180
7000 6820-7180

8 -322 CHASSIS ELECTRICAL
NOTE: Since
the meter display permissible lev­
els
above are specifications solely for
the meter, they are to be used as refer­
ence values when conducting on-vehicle
inspection.
p
IGN GND
[b!J INDIVIDUAL INSPECTION
I tii~,l Remove the tachometer from the meter
assembly and measure the resistance value and
the current consumption between each
terminals. (Fig. 8-354)
Replace the tachometer when the result of in­
spection is found abnormal.
Resistance value
Red(+) Black(-) Black(-) Red(+)
IGN GND IGN GND IGN-GND 00 23-31k
®-GND
p GND p GND
00 24.7 -33.4k
Note: Use the analog type
circuittester (range: x 1k)
Current value
Terminal
symbol
IGN-GND
(±) 8
Current
consumption
90± 15mA Remarks
(12 ± 1V when
No signal input
voltage applied)
Note: 1. Use the analog type circuit tester.
2. Since the current consumption fluctuates
as the power voltage varies, check to be
sure that the
voltage applied is 12 ± 1V.
Fig. 8-354
E) REMOVAL (FIG. 8-355)
Preparation: Disconnect the battery ground cable.
1. Meter assembly
Fig. 8-355
1.
Meter assembly
2. Meter cluster glass
3. Meter
• Remove three screws securing the meter at
the back side. (Fig. 8-356)
Fig. 8-356
•

8-324 CHASSIS ELECTRICAL
B REMOVAL (FIG. 8-359)
Preparation: Disconnect the battery ground cable.
Voltmeter
Fig. 8-359
1. Meter assembly
2. Meter cluster glass
ENGINE COOLANT TEMPERATURE
(ECT) GAUGE
CIRCUIT DIAGRAM OF ECT GAUGE
(FIG. 8-361)
SRS indicator bulb connector
Fig. 8-360
3. Voltmeter
• Loosen the screw for support the Supplemen­
tal
Restraint System (SRS)-AIR BAG indicator
light bulb connector.
• Remove three screws securing the meter at
the back side, and then remove
it together
with the
ECT gauge. (Fig. 8-360)
B INSTALLATION
To install, follow the removal steps in the reverse ....-...
order. ,........
Thermo unit
ECTgauge
Fig. 8-361
•

8-326 CHASSIS ELECTRICAL
~ INSPECTION
l~l Remove the oil pressure gauge from the meter
assembly, and measure the resistance value
between each terminal. (Fig. 8-364)
Replace the gauge when the result of inspection ~
is found abnormal.
(Q)
Terminal symbol Resistance value
(+)-OIL U 65± 6.5
OIL U-(-) 98±9.8
{+)-{-) 112± 11.2
Note: The resistance value between {+)and(-)
includes the resistance value for the fuel
gauge since these terminals are shared
with the
fuel meter.
Fig. 8-364
B REMOVAL (FIG. 8-365)
Preparation: Disconnect the battery ground cable.
gauge
2. Meter cluster glass
Fig. 8-365
1.
Meter assembly
2. Cluster meter glass
3. Oil pressure gauge
• Remove six screws securing the meter body
from the back side, and then remove it to­
gether with the fuel gauge. (Fig. 8-366)
Fig. 8-366
E) INSTALLATION
To install, follow the removal steps in the reverse
order.
•

CHASSIS ELECTRICAL 8-351
1. SUN ROOF DOES NOT OPEN
2. SUN ROOF DOES NOT CLOSE
• TURN THE STARTER SWITCH ON
• IS BATTERY VOLTAGE APPLIED BETWEEN 21 S-41 AND THE GROUND?
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YES I NO J
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• IS ~GROUNDED SECURELY? I REFER TO ITEM No.5 uPOWER SOURCE
CIRCUIT DIAGNOSISu IN THIS DIAGNOSIS
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YES I NO I
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• IS THE SUN ROOF SWITCH NORMAL? I GROUND IT SECURELY I
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YES j NO I
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• IS THERE ANY CONTINUITY BETWEEN 3 ~-1 ~ REPAIR OR REPLACE THE SWITCH I lSI s-si-3[BJl?
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YES I NO I
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• IS THERE ANY CONTINUITY BETWEEN 2 [BJ-~? REPAIR A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT IN THE CIRCUIT
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YES I NO I
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• CONNECT THE BATTERY(+) TERMINAL TO THE SUN REPAIR A POOR CONNECTION OF THE CONNECTORS
ROOF MOTOR SIDE CONNECTOR TERMINAL
1 ~ OR AN OPEN CIRCUIT IN THE CIRCUIT
(2 ~I AND THE(-) TERMINAL TO 2 ~ (1 S-3 I
• DOES THE MOTOR ROTATE?
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YES I NO I
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• IS THERE ANY CONTINUITY BETWEEN THE HARNESS REPAIR OR REPLACE THE MOTOR I SIDE CONNECTOR TERMINALS 1 ~-21 S-31 ?
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YES I NO I
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• IS THERE ANY CONTINUITY BETWEEN 4 ~-~ ? REPAIR A POOR CONNECTION OF THE CONNECTORS
0
OR AN OPEN CIRCUIT IN THE CIRCUIT

8-352 CHASSIS ELECTRICAL
~
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I YES I
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I REPLACE THE CONTROL UNIT I
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NO I
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REPAIR A POOR CONNECTION OF THE CONNECTORS
OR AN OPEN CIRCUIT IN THE CIRCUIT
3. SAFETY STOP MECHANISM DOES NOT OPERATE
BEFORE
SUN ROOF CLOSES COMPLETELY
• IS THE CONTINUITY IN THE SAFETY STOP SWITCH
NORMAL?
i
YES I
• IS THERE ANY CONTINUITY BETWEEN 5 ~ - 3 ~? I
YES I
REPAIR AN OPEN CIRCUIT BETWEEN 1 ~AND THE GROUND OR GROUND IT SECURELY
~~------------~
I REPAIR OR REPLACE THE SWITCH
I NO ,___.
!I REPAIR A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT IN THE CIRCUIT
4. LIMIT SWITCH MECHANISM DOES NOT OPERATE
BEFORE
SUN ROOF OPEN COMPLETELY
• IS THE CONTINUITY IN THE LIMIT SWITCH NORMAL?
~ + ~ I
• IS THERE ANY CONTINUITY BETWEEN 5 ~-3 ~? i
REPAIR A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT BETWEEN 11liJ-~
REPAIR OR REPLACE THE SWITCH
REPAIR
A POOR CONNECTION OF THE CONNECTORS OR AN OPEN CIRCUIT IN THE CIRCUIT I
..

CHASSIS ELECTRICAL 8-353
5. POWER SOURCE CIRCUIT DIAGNOSIS
• IS THERE ANY CONTINUITY BETWEEN THE TERMINALS
OF C/B-2 130Al?
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YES I NO I
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• IS FUSE C-4 (10Al NORMAL? I PUSH IN THE RESET BUTION OF CIRCUIT BREAKER
AND CHECK THE CONTINUITY AGAIN. IF THERE IS NO CONTINUITY AFTER PUSHING RESET BUTION, REPLACE IT WITH NEW ONE.
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YES I NO I
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• IS THE POWER WINDOW RELAY NORMAL? I REPLACE THE FUSE I
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YES I NO I
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• TURN THE STARTER SWITCH ON REPLACE THE RELAY I
• IS BATIERY VOLTAGE APPLIED BETWEEN 1 I B-371 AND THE GROUND, 2 IB-371 AND THE GROUND?
1
YES I NO I
I
• IS IB-191 GROUNDED SECURELY? I REPAIR A POOR CONNECTION OF THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN FUSE C-4 (10A)-
1 IB-371 OR 1 IH-141 -2 IB-371
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YES I NO I
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REPAIR A POOR CONNECTION OF THE CONNECTORS GROUND IT SECURELy I
OR AN OPEN CIRCUIT BETWEEN 3 IB-371 -IB-191

CHASSIS ELECTRICAL 8-365
DRIVER SEAT
1. POWER SEAT DOES NOT OPERATE AT ANY DIRECTION
• IS THE CIRCUIT BREAKER C/B-2 (30A} NORMAL? l
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YES I NO J
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• IS TERMINAL IB-261 SECURELY GROUNDED? I REPLACE THE CIRCUIT BREAKER J
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YES I NO I
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• IS THE BATTERY VOLTAGE APPLIED BETWEEN 11 T-91
GROUND IT SECURELY I AND GROUND?
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YES I NO j
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REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN REPAIR A POOR CONNECTION AT THE
OPEN CIRCUIT 21 T-9 I AND I B-261 CONNECTORS OR AN OPEN CIRCUIT BETWEEN CIRCUIT BRAEKER AND 11 T-9 I

8-368 CHASSIS ELECTRICAL
PASSENGER SEAT
1. POWER SEAT DOES NOT OPERATE AT ANY DIRECTION
• IS THE CIRCUIT BREAKER C/B-2 (30A) NORMAL? I
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YES I NO I
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• IS TERMINAL IB-261 SECURELY GROUNDED? I REPLACE THE CIRCUIT BREAKER I
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YES I NO I
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• IS THE BATIERYVOLTAGE APPLIED BETWEEN 11 T-91 GROUND IT SECURELY I AND GROUND?
l
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YES I NO I
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REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN REPAIR A POOR CONNECTION AT THE
OPEN CIRCUIT 21 T-91 AND I B-261 CONNECTORS OR AN OPEN CIRCUIT BETWEEN CIRCUIT BRAEKER AND 11 T-91
•