ECU ISUZU TROOPER 1995 Repair Manual

CHASSIS ELECTRICAL 8 -99
2-1 REAR DEFOGGER DOES NOT OPERATE
• ARE THE FUSES C-4 (10Al AND C-17
I (25Al NORMAL?
I
I
YES I NO l
I
• IS THE REAR DEFOGGER RELAY NORMAL? REPLACE THE FUSE. I
I
I
YES I NO I
1
• IS THE REAR DEFOGGER SWITCH NORMAL? I REPLACE THE RELAY I
I
I
YES I NO I
I
• ARE WJ AND ~GROUNDED SECURELY? I REPAIR OR REPLACE THE SWITCH.l
I
I
YES I NO I
I
• TURN ON THE STARTER SWITCH AND THE REAR DEFOGGER
GROUND THEM SECURELY. I SWITCH.
• IS THERE A BATIERY VOLTAGE APPLIED BETWEEN THE REAR DEFOGGER CONNECTOR 1 ~ AND THE GROUND?
I
I
YES I NO l
I
REPAIR A POOR CONNECTION OF THE REPAIR A POOR CONNECTION AT THE
CONNECTORS CONNECTORS OR AN OPEN
CIRCUIT IN
OR AN OPEN CIRCUIT BETWEEN 1[]TI EACH OF THE FOLLOWING
AND[BTI CONNECTIONS: FUSE C-17 (25Al AND
2 I B-38 • FUSE C-4 (10Al AND 31 B-38 I.
4
1B-38 AN~,4~AND 1 ~ , 5 1-17 AND B-19
.

REAR DEFOGGER SWITCH
(1!] INSPECTION
I~~ Check to see if there is any continuity between
the terminals
of the defogger switch. (Fig. 8-127)
Replace the switch, when the result
of inspection
is found abnormal.
a [~~·~] ]]
r ~)
~0. s 1
4
ON o-r--0---
OFF o-~
Fig. 8-127
B REMOVAL (FIG. 8-128)
5. Rear defogger switch
Fig. 8-128
[ill
5 2 1 s
-o
~
4. Instrument panel
.cluster assembly
CHASSIS ELECTRICAL 8-103
Preparation: Disconnect the battery ground cable.
1.
Front console assembly
2. Lower cluster assembly
3. Instrument panel driver lower cover
4. Instrument panel cluster assembly
• Refer to FOG LIGHT SWITCH removal steps
in
this section.
5.
Rear defogger switch
• To remove the switch, pushing the lock from
the back side of the cluster assembly.
E) INSTALLATION
To install, follow the removal steps in the reverse
order, noting
the following point.
1. Push in the switch with your fingers until it locks
securely.
REAR DEFOGGER HEAT WIRES
w CAUTION:
• Heat wires are printed on the inner side of
the rear glass.
To clean, use a
soft cloth and wipe horizon­
tally along the wires.
• Never use glass cleaner or equivalent.
~ INSPECTION
It~ I Measure the voltage of heat wire.
Repair the heat wire
when the result of inspection
is found abnormal.
'f CAUTION:
• When measuring voltage, wind a piece of
tin foil around the tip of the negative probe
and press
the foil against the wire with your
finger (Fig. 8-129).
1. Turn the starter switch on.
2. Turn the rear defogger switch on.
3. Measure the voltage between the three points
on
the heat wire and the(-) terminal with a voltmeter.
4. Check that the voltage becomes smaller from ®
to @to© (Fig. 8-130).
5. If there is a place where the voltage suddenly
changes
to OV, there is a OPEN CIRCUIT between
there and the
prior point.

8-112 CHASSIS ELECTRICAL
1-1 TURN SIGNAL LIGHT DOES NOT FLASH
~ ..
I • IS FUSE C-3 (15A) NORMAL?
I
YES
I NO I
I
• IS THE FLASHER UNIT NORMAL? I REPLACE THE FUSE I
I
YES
I NO I
I
• DISCONNECT THE CONNECTORS OF THE HAZARD REPLACE
THE FLASHER UNIT
WARNING SWITCH
• TURN THE STARTER SWITCH ON .
• IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE
HAZARD WARNING SWITCH HARNESS SIDE CONNECTOR 8 WJ] AND THE GROUND?
I
YES
I NO I
I
• WITH THE HAZARD WARNING SWITCH TURNED OFF, IS REPAIR A POOR CONNECTION AT THE CONNEC ORS THERE CONTINUITY BETWEEN
THE SWITCH CONNEC-OR AN OPEN CIRCUIT BETWEEN THE FUSE C-3 ( SA) ~ TORS 7 [Iill AND 8 WJ] 7 8!ITIJ.
I
YES
J NO I
I
• DISCONNECT THE CONNECTORS OF THE FLASHER UNIT • REPAIR OR REPLACE THE SWITCH I • IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE FLASHER UNIT HARNESS SIDE CONNECTOR 1 IB-531 AND THE GROUND?
I
YES
I NO I
I
• IS IB-191 GROUNDED SECURELY? I REPAIR A POOR CONNECTION AT THE CONNEC ORS
OR AN OPEN CIRCUIT BETWEEN THE HARNESS SIDE
CONNECTORS 7 WJ] -1IB-53I.
I
YES
I NO I
I
• IS THERE CONTINUITY BETWEEN THE HARNESS SIDE GROUNDED IT SECURELY I CONNECTORS 3IB-s3l -IB-191 7
~
I
YES
I NO I
I I
CONTINUED ON THE FOLLOWING PAGE CONTINUED ON THE FOLLOWING PAGE
•

8 -114 CHASSIS ELECTRICAL
1-3 BOTH CORNERING LIGHTS INOPERATIVE
~ : ...
DO THE HEADLIGHT LIGHTS COME ON? I •
I
YES
I NO I
1
• IS FUSE C-3 {15A) NORMAL? I TURN THE HEADLIGHT ON. {REFER TO DIAGN
PSIS
CHART
FOR HEADLIGHT.)
I
YES
I NO I
I
• IS 5 IC-161 GROUNDED SECURELY? REPLACE THE FUSE I
I
YES
I NO I
I
• DISCONNECT THE CONNECTORS AT THE CORNERING RELAY . GROUND IT SECURELy I
• TURN ON THE STARTER SWITCH AND THE LIGHTING SWITCH .
• IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE
RELAY
HARNESS SIDE CONNECTOR 3 IX-221 AND GROUND, AND NBETWEEN 4 IX-221 AND GROUND?
~
I
YES
I NO I
I
• IS THE CORNERING RELAY NORMAL? I REPAIR A POOR CONNECTION OF THE CONNEC TORS
OR AN OPEN CIRCUIT BETWEEN FUSE C-3 ~ 3 IX-221 OR BETWEEN FUSE F-4 {15A)-4 X-2~
I
YES
I NO I
I
• DISCONNECT THE CONNECTORS AT THE TURN SIGNAL/ REPAIR OR REPLACE THE RELAY I CORNERING LIGHT SWITCH.
• IS THERE A BATTERY VOLTAGE APPLIED BETWEEN THE
SWITCH HARNESS SIDE CONNECTOR 11IB-12I AND GROUND?
I
YES
I NO I
I
• IS THERE CONTINUITY BETWEEN THE CORNERING LIGHT REPAIR A
POOR CONNECTION AT THE CONNI;,C
SWITCH CONNECTORS
11IB·121-i IB-yl {WHEN TORS OR AN OPEN CIRCUIT BETWEEN 2IX-22I
TURNING LEFT), AND BETWEEN 11 B-12 -10 IB-121 AND 11IB-12I
~ {WHEN TURNING RIGHT)?
I
YES
NO I
cbNTINUED ON THE FOLLOWING PAGE I CONTINUED ON THE FOLLOWING PAGE
..

-
8-116 CHASSIS ELECTRICAL
2-1 BOTH BACKUP LIGHTS INOPERATIVE
• IS FUSE C-3 (15A) NORMAL? I
I
I
YES I
I
• IS ~GROUNDED SECURELY? I
I
I
YES I
I
• TURN THE STARTER SW ON
• IS THE BATIERY VOLTAGE APPLIED BETWEEN THE
MODE
SW lOR BACKUP LIGHT SW) HARNESS SIDE coNNECTOR 5 I C-431 11 I M-al >AND THE GROUND?
I
I
YES .J
I
• SET THE TRANSMISSION GEAR TO THE REVERSE POSITION
• WITH
THE MODE SW !OR BACKUP LIGHT SW) CONNECTOR
DISCONNECTED, IS THERE CONTINUITY BETWEEN SWITCH
SIDE
coNNECTORS 2 lc-431 AND 5 I C-431 11 I M-al AND 1 IM-91 )?
I
J
YES I
I
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN
OPEN CIRCUIT BETWEEN 2 I C-431 ( 1 I M-91 ) AND 9 I H-321
I
NO j
I
REPLACE THE FUSE j
I
NO I
I
GROUND IT SECURELY I
I
NO I
I
REPAIR AN POOR CONNECTION AT THE CONNECTORS
OR AN OPEN CIRCUIT BETWEEN THE FUSE C-3 15A)
AND 5 lc-431 !OR 1 I M-al 1
I
NO I
I
REPAIR OR REPLACE THE MODE SW (BACKUP LIGHTSW)
NOTE: Connectors in parenthesis "( )" indicates the model with manual transmission.
..

8-118 CHASSIS ELECTRICAL
2-4 HORNS DO NOT SOUND
~ ''
• IS FUSE F-3 (15A) NORMAL? I
I
YES j NO I
I
• IS HORN BODY GROUNDED SECURELY? I I REPLACE THE FUSE I
I
YES I NO I
I
• DISCONNECT THE HORN RELAY CONNECTOR GROUND IT SECURELy I
• IS THE BATIERY VOLTAGE APPLIED BETWEEN 2 I X-8 I
AND THE GROUND?
I
YES I NO I
I
• IS THE HORN RELAY NORMAL? I REPAIR A POOR CONNECTION AT THE CONNE TORS OR AN OPEN CIRCUIT BETWEEN FUSE F-3 (15.4
AND 21 X-81
~
I
YES NO I
I
• DISCONNECT THE HORN SW CONNECTOR . REPLACE THE RELAY J
• IS THE BATIERY VOLTAGE APPLIED BETWEEN lu-101
AND THE GROUND?
I
YES I NO J
I
• IS THE HORN SW NORMAL? I REPAIR A POOR CONNECTION AT THE CONN~ ~RS OR AN OPEN CIRCUIT BETWEEN 11 X-8 I AND ~ 0
I
YES / NO /
I
REPAIR A POOR CONNECTION AT THE CONNECTORS OR AN REPAIR OR REPLACE THE HORN SW
OPEN CIRCUIT BETWEEN 31 X-8 I AND 1IC-27l (11 C-281) (COMBINATION SW)
~
•

8-122 CHASSIS ELECTRICAL
rn
~~:::1
ill I -
~I . 4 s 6 7 8 2 1 3 n
ON o--o-f-0 0 -o
~ OFF o--o
Fig. 8-144
B REMOVAL (FIG. 8-145)
Preparation: Disconnect the battery ground cable.
5. Hazard warning switch 4. Instrument panel
cluster assembly
I
I
3. Instrument / panel driver lower cover ,
This illustration is based on re-ar defogger SW removal.
Fig, 8-145
'(
1. Front console assembly
2. Lower cluster assembly
3. Instrument panel driver lower cover
4. Instrument panel cluster assembly
• Refer to FOG LIGHT SWITCH remov I steps
in this section.
5. Hazard warning switch
• To remove the switch, pushing the lo k from
the back side of the cluster assembly.
B INSTALLATION
To install, follow the removal steps in the everse
order, noting the
following point
1. Push in the switch with your fingers until t locks
securely.
FLASHER UNIT
~ INSPECTION
When a SSW bulb is connected to the u it side
terminals No. 1(L) and 3(E) while connecti g the
battery
(+) terminal to terminal No. 1(8), nd the
battery (-)
terminal to terminal No. 3(E), d es the
bulb light on and off? (Fig. 8-146)
~
•

•
•
•
•
•
CHASSIS ELECTRICAL 8-147
1. ALL THE DOORS DO NOT LOCK AND UNLOCK BY DOOR LOCK
SW-LH
IS FUSE C-18 (20Al NORMAL? I
I
YES I NO I
I
IS I
B-181 GROUNDED SECURELY? I REPLACE THE FUSE I
I
YES
j NO I
l
DISCONNECT THE DOOR LOCK SW-LH CONNECTOR
GROUND IB-18ISECURELY
IS
BATTERY VOLTAGE APPLIED BETWEEN 10~
AND GROUND?
l
YES I NO I
l
IS THERE ANY CONTINUITY BETWEEN 11 D-5 I I REPAIR A POOR CONNECTION OF CONNECTORS
AND I B-181 OR AN OPEN CIRCUIT BETWEEN FUSE C-18 (20A)
AND 10 I D-51
I
YES I NO I
I
REPAIR
OR REPLACE THE DOOR LOCK SW-LH J REPAIR A POOR CONNECTION OF CONNECTORS
OR AN OPEN CIRCUIT BETWEEN 11 D-5 I AND
I B-181

8-148 CHASSIS ELECTRICAL
2. ALL THE DOORS DO NOT GET LOCKED (OR UNLOCKED) B~
FRT DOOR LOCK SW-RH
• CHECK THE DOOR LOCKING CONDITION BY
DOOR LOCK SW-LH
I
I
YES I
I
• IS CONTINUITY IN THE FAT DOOR LOCK SW-RH
NORMAL?
I
I
YES I
I
• IS(]}] GROUNDED SECURELY?
I
I
YES I
1
REPAIR A POOR CONNECTION OF CONNECTORS OR
AN OPEN CIRCUIT BETWEEN 2 I D-301 AND 31 D-141
OR 1 I D-301 AND 41 D-141
I
I
I NO I
I
I REFER TO ITEM NO. 1 IN THIS DIAGNOSIS I
I
I NO I
I
I REPAIR OR REPLACE THE DOOR LOCK SW-L -1 I
I
I NO I
I
I GROUND[]]]SECURELY I
3. FRT DOOR-LH DOES NOT GET LOCKED (OR UNLOCKED)
4. FRT DOOR-RH DOES NOT GET LOCKED (OR UNLOCKED
5. RR DOOR-LH DOES NOT GET LOCKED (OR UNLOCKED)
6. RR DOOR-RH DOES NOT GET LOCKED (OR UNLOCKED)
7. TAILGATE DOES NOT GET LOCKED (OR UNLOCKED)
I REPLACE THE DOOR LOCK ACTUATOR I
..

CHASSIS ELECTRICAL 8-161
ALL WINDOWS DO NOT OPERATE
• IS FUSE C-4 (10A) NORMAL? I
I
YES I NO I
I
• IS THE CIRCUIT BREAKER C/B-2 (30Al NORMAL? I REPLACE THE FUSE I
I
YES I NO I
I
• ARE ~AND I B-19 !sECURELY GROUNDED? J REPLACE THE CIRCUIT BREAKER I
I
YES I NO I
I
• IS THE POWER WINDOW RELAY NORMAL? I GROUND THEM SECURELY I
I
YES I NO I
I
• IS THE BATTERY VOLTAGE APPLIED BETWEEN 21 B-37 I J REPLACE THE RELAy I AND THE GROUND?
I
YES I NO
I
I
• TURN THE STARTER SW ON REPAIR A POOR CONNECTION AT THE CONNECTORS
• IS THE BATTERY VOLTAGE APPLIED BETWEEN 11 B-371 AND OR AN OPEN CIRCUIT BETWEEN 1 CB:BJ AND THE GROUND? 2IB-37I
I
YES j NO I
I
• IS THE BATTERY VOLTAGE APPLIED BETWEEN 7[@ AND REPAIR A POOR CONNECTION AT THE CONNECTORS
GROUND? OR AN OPEN CIRCUIT BETWEEN FUSE C-4 (10A)
AND 11 B-461
I
YES I NO J
I
• IS THERE
BATTERY VOLTAGE APLIED BETWEEN I B-1sl,l B-191 REPAIR A POOR CONNECTION AT THE CONNECTORS
AND THE GROUND? OR AN OPEN
CIRCUIT BETWEEN 41 B-371 AND 71 D-51
I
YES I NO I
I
REPLACE THE DRIVER SIDE POWER WINDOW I& DOOR LOCK) 1 SWITCH REPAIR A POOR CONNECTION AT IHE TONNiCTOiS OR AN OPEN
CIRCUIT BETWEEN 1 D-5 AND B-18
OR sl B-371 AND I B-191