ECU ISUZU TROOPER 1995 Manual PDF

CHASSIS ELECTRICAL 8-259
1. MIRRORS ON BOTH SIDES DO NOT OPERATE
• IS THE FUSE C-11 (10AI NORMAL? I
I
YES
I NO I
I
• IS IB-191 SECURELY GROUNDED? I REPLACE THE FUSE I
I
YES
j NO I
I
• REMOVE THE CONNECTORS OF THE DOOR MIRROR CONTROL SW GROUND IT SECURELY I
• SET THE STARTER SW TO "ACC" POSITION
• IS BATTERY VOLTAGE APPLIED BETWEEN THE HARNESS
SIDE
CONNECTOR 4IB-55I AND THE GROUND?
I
YES
j NO I
I
• IS THERE ANY CONTINUITY BETWEEN THE HARNESS REPAIR A POOR CONNECTION AT CONNECTORS OR
SIDE CONNECTORS siB-551 AND IB-191? AN OPEN CIRCUIT BETWEEN THE FUSE C-11 (10AI
AND 4IB-55I (DOOR MIRROR SWI
I
YES
I NO I
I
• IS THE CONTINUITY IN THE DOOR MIRROR CONTROL REPAIR A POOR CONNECTION AT CONNECTORS
SWITCH NORMAL? OR A OPEN CIRCUIT IN THE CIRCUIT
I
YES
I NO I
I
REPAIR
A POOR CONNECTION AT CONNECTORS OR REPLACE THE DOOR MIRROR CONTROL SW I
AN OPEN CIRCUIT BETWEEN 3@] AND 18IH-18I

CHASSIS ELECTRICAL 8-263
9. MIRROR DEFOGGER ON THE LEFT (OR RIGHT) SIDE DOES
NOT OPERATE
• DISCONNECT THE MIRROR CONNECTOR ON THE LEFT (OR RIGHT) SIDE.
• TURN THE STARTER SWITCH AND THE
DEFOGGER SWITCH ON
• IS THERE A BATTERY VOLTAGE APPLIED BETWEEN 31 D-31 13ID-12I I AND THE GROUND?
I
YES I NO I
l
• IS THE CONTINUITY IN THE MIRROR NORMAL? REPAIR A POOR CONNECTION OF
THE CONNECTORS OR AN OPEN
CIRCUIT BETWEEN sl B-571 AND
31 D-31 13ID-12I 1
I
YES I NO I
J
• IS I B-181 1(&[] I GROUNDED SECURELY? REPAIR OR REPLACE THE MIRROR
I
YES I NO I
I
REPAIR A POOR CONNECTION OF CONNECTORS GROUND IT SECURELY I
OR AN OPEN CIRCUIT BETWEEN al D-3 I AND
IB-1BI(aiD-12I AND~ 1
NOTE: Connectors shown in the parenthesis"()" indicate a check point of the door mirror on the
right side
that does not operate.

E) REMOVAL (FIG. 8-310)
Preparation: Disconnect the battery ground cable.
2. Door mirror switch assembly
Fig. 8-310
1. Front console assembly
• Remove four screws.
• Remove the transmission shift lever knob.
• Remove the transfer shift lever knob.
• Disconnect the seat heater switch connectors
(If so equipped).
• Disconnect the door mirror switch connectors.
• Disconnect the "POWER & WINTER" switch
connectors.
(A/T only)
2. Door mirror switch assembly
• To remove the switch, pushing the switch locks
from the back side of the front console.
B INSTALLATION
To install, follow the removal steps in the reverse
order, noting the
following point.
1. Depress the switch with your fingers until it locks
securely.
CHASSIS ELECTRICAL 8-267
DOOR MIRROR (FIG. 8-311)
Fig. 8-311
Mirrors contain two driving motors for the horizontal
and vertical movement of the mirror and one motor
for folding the mirror.
The movement of the mirror is controlled by the
direction
of current running through these motors.
The housing portion
ofthe mirror is provided with the
auto-stop mechanism which is
interlocked with the
motor for folding the mirror. When the mirror moves
to the stop position (with the mirror folded or returned
to its original position), the current to the motor is
shut off.
When the
mirror cannot operate due to some obstacle
and the motor stops its rotation, the resistor prevents
current
overflow.
~ INSPECTION
Operating test
Apply battery voltage to the harness side connector
I B-ssl and I B-561 of the door mirror switch and check
its function. (Fig.8-312)

DIAGNOSIS
DIAGNOSIS PROCEDURE
.......,. 1. Check to see ifthe battery voltage is normal.
2. Check to see if the fuse is normal.
CHASSIS ELECTRICAL 8 -275
3. Replace the anti-theft controller with one reserved for test. If a trouble recurs even after replacing the
controller, find
out the cause of the trouble by referring to "System check procedure" and the following list.
Item Malfunction
Possible
cause Detecting method Remarks
Defective
contact of door switch,
With door open, dome light and Burnt
out indicator
ANTI-THEFT or open circuit in door switch courtesy light do not come on. light bulb possible.
indicator light wiring.
A does
not flash Short circuit in the detect switch.
Check controller connector. Refer to "Connector check procedure" in
this system.
Engine hood, doors and
tailgate Check to see if doors are closed are not fully closed and locked. and locked.
Defective door switch, or short Dome light and courtesy light circuit in switch wiring.
remain lit on after closing doors.
Indicator light Defective tamper switch, or short Check controller connector. Refer
to "Connector
does not circuit in wiring. check procedure" in
change to
fully this system.
B
ON condition, Defective lock switch, or short Check controller connector. Refer
to "Connector or does not come on at all circuit in wiring. check procedure" in
this system.
Defective engine hood switch, or Check
controller connector. Refer
to "Connector
short circuit in wiring. check
procedure" in
this system.
Defective
tailgate switch, or short Luggage room light remains lit circuit in wiring. after closing tailgate.
ANTI-THEFT
Defective controller.
c indicator light
does not turn off.(Steadily on) Poor contact
of lock switch, or Check alarm operation (See
When
door is open
circuit in wiring. No. 46 of "System
check procedure," possible cause
opened by
is a poor contact of lock switch or D pulling up
a open circuit in wiring. locking knob, alarm does not Broken wire in wiring to headlight Check to see if headlights go Refer
to "Connector operate
and horn, or a blown fuse. out. check procedure" in
Check
controller connector. this
system.
Alarm does not Defective contact of detect switch, Check controller connector.
Refer to "Connector
E
stop. or damaged switch wiring. check procedure" in
this system.
Even when
door Defective contact of detect switch, Check controller connector. Refer
to "Connector
unlocked
or damaged switch wiring. check procedure" in
F
with key, alarm this system.
operates. Door detect switch is
assembled When key is turned to lock posi-
to
wrong door. tion, alarm stops.

CHASSIS ELECTRICAL 8-301
3. VOLTMETER
3-1 VOLTMETER NEEDLE DOES NOT MOVE ._..,
3-2 VOLTAGE READING IS TOO LOW {OR HIGH)
• IS THE METER ASSEMBLY CONNECTOR~ SECURELY CONNECTED?
I
YES I NO I
I
• DISCONNECT THE METER ASSEMBLY CONNECTORS~ AND(IiQJ
CONNECT THE CONNECTOR SECURELy I
• TURN ON THE STARTER SWITCH
• IS THE BATTERY VOLTAGE APPLIED BETWEEN THE HARNESS
SIDE CONNECTORS 14(m AND 4 ~ OF THE METER
ASSEMBLY?
I
YES I NO l
I
• IS THERE A OPEN CIRCUIT IN THE PRINTED CIRCUIT OF THE REPAIR A POOR CONNECTION OF THE CONNECTORS METER ASSEMBLY? OR A OPEN CIRCUIT IN T~IRCUIT BETWEEN THE
FUSE C-10 (10A) AND 14 1-9 I' OR THE CONNECTORS 4 [@] AND 4 C-39
I
YES ] NO I
I
REPLACE THE PRINTED CIRCUIT BOARD I CHECK THE VOLTMETER AND REPLACE IT A IF
NECESSARY (REFER TO THE CHECKING OF THE
VOLTMETER
IN THIS SECTION)

8-302 CHASSIS ELECTRICAL
4. ENGINE COOLANT TEMPERATURE (ECT) GAUGE
4-1 NEEDLE DOES NOT MOVE
• IS THE CONNECTOR OF THE THERMO UNIT CONNECTED SECURELY?
I
YES I
I NO l
I
• DISCONNECT THE CONNECTOR OF THE THEMO UNIT. I CONNECT THE CONNECTOR SECURELY I
• CONNECT A 3.4~B BETWEEN THE HARNESS SIDE CONNECTOR 1 E-19 AND THE GROUND OF THE THERMO
UNIT
• WHEN THE STARTER SW IS TURNED ON, DOES THE
ECT GAUGE POINTER MOVE ABOUT 10 SECONDS AFTER THAT?
I
YES I NO I
1
• IS THE THERMO UNIT NORMAL? I • IS THE CIRCUIT BETWEEN THE ECT GAUGE AND THE
THERMO UNIT NORMAL?
I I
YES I
I NO I I I
YES I l I NO
REPAIR A POOR CONNEC-I REPLACE THE THERMO UNIT I T T
TION AT THE CONNECTOR • IS THERE A BROKEN WIRE REPAIR A POOR CONNECTION
IN THE PRINTED CIRCUIT OF THE CONNECTORS OR A
OF THE METER ASSEMBLY? OPEN CIRCUIT IN THE CIRCUIT
I
I l
YES I NO I
I l
REPLACE THE PRINTED CHECK THE ECT GAUGE AND
CIRCUIT BOARD REPLACE IT WITH A CORRECT
ONE IF NECESSARY
•

8-304 CHASSIS ELECTRICAL
4-3 NEEDLE OVERSHOOTS (GOES UP TO THE 11H" RANGE)
• DISCONNECT THE CONNECTOR OF THE THERMO UNIT • WHEN THE STARTER SW IS TURNED ON, DOES THE
POINTER REACH TO THE "H" RANGE?
I
I I
YES I NO I
I I
• IS THERE
A SHORT CIRCUIT BETWEEN THE REPLACE
THE THERMO UNIT THERMO UNIT AND THE ENGINE COOLANT TEMPERATURE (ECT) GAUGE?
I
I
I
YES I NO I
I I
REPAIR THE SHORT CIRCUIT I • IS THE PRINTED CIRCUIT OF THE METER
ASSEMBLY GROUNDED SECURELY?
I
I l
YES I NO I
I I
CHECK
THE ECT GAUGE, REPAIR OR REPLACE THE PRINTED
AND REPLACE IT IF CIRCUIT BOARD
NECESSARY

5. OIL PRESSURE GAUGE
5-1 NEEDLE DOES NOT MOVE
• DISCONNECT THE CONNECTOR OF THE OIL PRESSURE UNIT
•
WHEN THE STARTER SW IS TURNED ON, DOES THE NEEDLE REMAIN STILL?
l
J I
YES I NO I
I I
CHASSIS ElECTRICAL 8-305
• IS THERE A SHORT CIRCUIT BETWEEN THE OIL REPLACE THE OIL PRESSURE UNIT I PRESSURE UNIT AND THE OIL PRESSURE GAUGE?
I
I I
YES I NO I
I l
REPAIR THE SHORT CIRCUIT I • IS THE PRINTED CIRCUIT OF THE METER ASSEMBLY GROUNDED SECURELY?
I
I I
YES I NO I
I I
CHECK THE OIL PRESSURE REPAIR OR REPLACE THE
GAUGE, AND REPLACE IT IF PRINTED CIRCUIT BOARD
NECESSARY

5-3 NEEDLE OVERSHOOTS
(GOES
UP TO 215 lb/in2 )
• IS THE CONNECTOR OF THE OIL PRESSURE UNIT [ILl CONNECTED SECURELY?
I
I
YES I
I
• IS THE OIL PRESSURE UNIT NORMAL? I
I
I
YES
I
• IS THERE A OPEN CIRCUIT IN THE CIRCUIT
BETWEEN THE OIL PRESSURE UNIT AND THE OIL PRESSURE GAUGE?
I
I
YES I
I
REPAIR A POOR CONNECTION AT THE CONNECTORS
OR A OPEN CIRCUIT IN THE CIRCUIT
CHASSIS ELECTRICAL 8 -307
I
NO I
I
RECONNECT THE CONNECTOR I
I
NO I
I
REPLACE THE OIL PRESSURE UNIT I
I
NO I
I
• IS THERE A OPEN CIRCUIT IN THE PRINTED CIRCUIT BOARD OF THE METER ASSEMBLY?
I
I
I
YES I NO j
I I
REPLACE THE PRINTED CHECK THE OIL PRESSURE GAUGE,
CIRCUIT BOARD AND REPLACE IT WITH A CORRECT
ONE IF NECESSARY

8-308 CHASSJS ELECTRICAL
6. FUEL GAUGE
6-1 FUEL GAUGE NEEDLE DOES NOT MOVE
• IS THE CONNECTOR OF THE FUEL TANK UNIT(£[]
CONNECTED SECURELY?
I
YES I I NO I
I
• DISCONNECT THE CONNECTOR OF THE FUEL TANK UNIT I CONNECT THE CONNECTOR I
• CONNECT A 3.4W BULB BETWEEN THE HARNESS SIDE CONNECTOR 2 ~AND THE GROUND OF THE FUEL TANK UNIT
• WHEN THE STARTER SW IS TURNED ON, DOES THE FUEL GAUGE NEEDLE FLUCTUATE AFTER ABOUT 90 SECONDS?
I
YES I NO I
I
• IS THERE CONTINUTV BETWEEN THE FUEL TANK UNIT • IS THE CIRCUIT BETWEEN THE FUEL GAUGE AND THE FUEL
CONNECTOR TERMINALS 2 ~AND 1 [£I) ? TANK UNIT NORMAL?
I
I I
l
YES I NO I YES I NO l
I I I
REPAIR A POOR CONNEC-REPLACE THE FUEL TANK • IS THERE A BROKEN WIRE REPAIR A POOR CONNECTION
TION AT THE CONNECTORS UNIT IN THE PRINTED CIRCUIT AT THE CONNECTORS OR A
OR A OPEN CIRCUIT OF THE METER ASSEMBL Y7 OPEN CIRCUIT IN THE CIRCUIT
BETWEEN THE FUEL TANK
UNIT AND THE GAUGE I
I I
YES I NO I
I l
REPLACE THE PRINTED CHECK THE FUEL GAUGE,
CIRCUIT BOARD AND REPLACE IT IF NECESSARY
..