ISUZU TROOPER 1998 Service Repair Manual

8D – 398 WIRING SYSTEM
Parts Location (LHD)
2
1
383
4
5
6
7
8
9
10
11
12
13
14
15
16 17
18
19
20
21 22 23 24 25 26 27 28 293031323334353637
Legend
(1) B-26
(2) I-8
(3) G-4
(4) G-5
(5) R-8
(6) H-37, H-38
(7) R-1
(8) D-21
(9) R-3
(10) D-6
(11) H-28, H-29
(12) D-5, D-30
(13) B-22
(14) H-32
(15) D-9
(16) D-8
(17) B-18, B-19
(18) H-22, H-23(19) H-8, H-26
(20) Fuse Box
(21) B-22
(22) M-25
(23) C-20
(24) H-10
(25) H-47
(26) D-17
(27) D-19
(28) H-18, H-19
(29) H-41, H-42
(30) Relay and Fuse Box (X-17)
(31) C-19
(32) H-12, H-15, H-21
(33) B-1
(34) D-16
(35) H-34, H-35
(36) D-26
(37) R-11
(38) B-12
D08RW679

WIRING SYSTEM 8DÐ399
Diagnosis
Diagnosis Procedure
1. Check to see if the battery voltage is normal.
2. Check to see if the fuse is normal.
3. Replace the antiÐtheft & keyless entry control unit with one reserved for test. If a trouble recurs even after replacing
the control unit, find out the cause of the trouble by referring to ÒSystem check procedureÓ and the following list.
ITEM MALFUNCTION POSSIBLE CAUSE DETECTING METHOD REMARKS
ANTIÐTHEFT
indicator light
does not flash
ANTIÐTHEFT
indicator light
does not turn off.
(Steadily on)
When door is
opened by pulling
up locking knob,
alarm does not
operate
Alarm does not
stop. Indicator light
does not change
to fully ON
condition, or does
not come on at
all.Burnt out indicator
light bulb possible.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system. Defective contact of door switch,
or open circuit in door switch
wiring.
Short circuit in the detect switch.
Engine hood, doors and tailgate
are not fully closed and locked.
Defective door switch, or short
circuit in switch wiring.
Defective tamper switch, or short
circuit in wiring.
Defective lock switch, or short
circuit in wiring.
Defective engine hood switch, or
short circuit in wiring.
Defective tailgate switch, or short
circuit in wiring.
Defective control unit.
Poor contact of lock switch, or
open circuit in wiring.
Broken wire in wiring to headlight
and horn, or a blown fuse.
Defective contact of detect
switch, or damaged switch wiring.With door open, dome light and
courtesy light do not come on.
Check the control unit connector.
Check to see if doors are closed
and locked.
Dome light and courtesy light
remain lit on after closing doors.
Check the control unit connector.
Check the control unit connector.
Check the control unit connector.
Luggage room light remains lit
after closing tailgate.
Check alarm operation (See No.
46 of ÒSystem check procedureÓ),
possible cause is a poor contact
of lock switch of an open circuit in
wiring.
Check to see if headlights go out.
Check the control unit connector.
Check the control unit connector. A
C
D
E B

8DÐ400 WIRING SYSTEM
ITEM MALFUNCTION POSSIBLE CAUSE DETECTING METHOD REMARKS
Even when door
unlocked with
key, alarm
operates.
Alarm does not
operate even with
tailgate open.
Even when
tailgate is opened
with key, alarm
does not stop.
Even when
engine hood is
opened with
remote release,
alarm does not
operate
Even when
starter switch is
turned, alarm
does not stop
Indicator light
continues
flashingRefer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system.
Refer to ÒConnector
check tableÓ in this
system. Defective contact of detect
switch, or damaged switch wiring.
Door detect switch is assembled
to wrong door.
Defective contact of tailgate
switch, or defective wiring.
Defective contact of tailgate
detect switch, or damage wiring.
Damaged engine hood switch or
wiring.
Defective contact of starter
switch.
Damaged door switch, or a short
circuit in wiring.
Damaged tamper switch, or a
short circuit in wiring.Check the control unit connector.
When key is turned to lock
position, alarm stops.
When luggage room light switch
is turned on with tailgate open,
luggage room light does not
come on.
Check the control unit connector.
With starter switch turned to
ÒACCÓ position, audio, cigarette
lighter and door mirrors (on
ÒACCÓ circuit) do not operate.
After closing door, dome light and
courtesy light remain on.
Check the control unit connector. F
G
H
I
J
K

WIRING SYSTEM 8DÐ401
System Check Procedure
STEP OPERATION ITEM TO BE CHECKEDITEM OF
REMARKS
MALFUNCTION
Be sure to lock door
with locking knob.
Activate alarm
device.
All doors are
unlocked.
With key set at unlock
position, check to see
if alarm stops.
All doors are
locked.
Activate alarm
device.
Activate alarm
device.
Only left rear door
is unlocked. Check to see if engine hood,
tailgate and doors are closed and
locked.
Check to see if indicator light
remains lit off.
Check to see if indicator light
flashes.
Check to see if dome light and
courtesy light illuminate.
Check to see if indicator light
changes from flashing to steadily
on.
Check to see if indicator light
turns off in about 10 seconds.
Check to see if alarm operates
(with headlight flashing, and horn
blaring intermittently.)
Check to see if alarm stops.
Check to see if indicator light
turns on.
Check to see if indicator light
goes off after about 10 seconds.
Check to see if alarm does not
operate.
Check to see if indicator light
turns on.
Check to see if indicator light
goes off after about 10 seconds.
Check to see if alarm starts. Turn starter key to ÒONÓ position.
Open windows fully.
Pull out starter key after turning it
back to ÒOFFÓ position.
Unlock left front door with locking
knob.
Open left front door. (And get out
of the vehicle.)
Close left front door.
Lock left front door.
Wait about 10 seconds
Unlock left front door with locking
knob.
Insert key into key cylinder of left
front door and turn it in unlock
direction.
Lock left front door.
Wait for about 10 seconds.
Unlock left front door with key.
Lock left front door with key.
Wait for about 10 seconds.
Unlock left rear door with locking
knob.K
A
B
C
D
E
B
C
F
B
C
D 1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16

8DÐ402 WIRING SYSTEM
STEP OPERATION ITEM TO BE CHECKEDITEM OF
REMARKS
MALFUNCTION
With key set at
unlock position,
check to see if
alarm stops.(All
doors are unlocked.)
All doors are
locked.
Activate alarm
device.
Only tailgate is
unlocked.
With key set at
unlock position,
check to see if
alarm stops.
Activate alarm
device.
Activate alarm
device. Check to see if alarm stops.
Check to see if indicator light
flashes.
Check to see if dome light and
courtesy light come on.
Check to see if indicator light is
steadily on.
Check to see if indicator light
turns off in about 10 seconds.
Check to see if alarm operates.
Check to see if alarm stops.
Check to see if indicator light
flashes.
Check to see if luggage room
light on.
Check to see if indicator light
changes over from flashing into
lighting condition.
Check to see if indicator light
goes off after about 10 seconds.
Check to see if alarm does not
operate.
Check to see if indicator light
come on.
Check to see if indicator light
goes off after about 10 seconds. Insert key into key cylinder of left
front door and turn it to unlock
direction.
Open left rear door.
With one person in vehicle, close
left rear door.
Lock left front door with locking
knob.
Wait about 10 seconds.
Unlock tailgate from inside with
locking knob.
Open tailgate, insert key into key
cylinder of tailgate and turn it in
lock direction.
Leave tailgate open.
Close tailgate
Insert key into tailgate key
cylinder and turn it in lock
direction.
Wait about 10 seconds.
Unlock tailgate with key.
Lock tailgate with key.
Wait about 10 seconds.E
A
B
C
D
H
A
G
B
C
F
B
C 17
18
19
20
21
22
23
24
25
26
27
28
29
30

WIRING SYSTEM 8DÐ403
STEP OPERATION ITEM TO BE CHECKEDITEM OF
REMARKS
MALFUNCTION
Only right rear door
is unlocked.
With key at unlock
position, check to
see if alarm stops.
(With all doors
unlocked.)
Activate alarm
device.
Only right front door
is unlocked.
With key at unlock
position, check to
see if alarm stops.
(With all doors
unlocked.)
Activate alarm
device. Check to see if alarm operates.
Check to see if alarm stops.
Check to see if indicator light
flashes.
Check to see if dome light and
courtesy light come on.
Check to see if indicator light
stays on steadily.
Check to see if indicator light
goes off after about 10 seconds.
Check to see if alarm operates.
Check to see if alarm stops.
Check to see if indicator light
flashes.
Check to see if dome light and
courtesy light come on.
Check to see if indicator light
stays on steadily.
Check to see if indicator light
goes off after about 10 seconds.
Check to see if alarm does not
operate.
Check to see if indicator light
stays on steadily. Unlock right rear door with
locking knob.
Insert key into key cylinder of
right front door and turn it in
unlock direction.
Open right rear door.
Close right rear door.
Insert key into key cylinder of
right front door and turn it in lock
direction.
Wait about 10 seconds.
Unlock right front door with
locking knob.
Insert key into key cylinder of
right front door and turn it in
unlock direction.
Open right front door.
Close right front door.
Lock right front door with key.
Wait about 10 seconds.
Unlock right front door with key.
Lock right front door with key.D
E
A
B
C
D
E
A
B
C
F
B 31
32
33
34
35
36
37
38
39
40
41
42
43
44

8DÐ404 WIRING SYSTEM
STEP OPERATION ITEM TO BE CHECKEDITEM OF
REMARKS
MALFUNCTION
Activate alarm
device. Check to see if indicator light
goes off after about 10 seconds.
Check to see if alarm operates.
Check to see if alarm stops. Wait about 10 seconds.
Open engine hood with engine
hood release handle.
Insert key into starter switch and
turn it to ÒACCÓ position.C
I
J 45
46
47
NOTE:When the connector of the antiÐtheft & keyless entry control unit is disconnected, the starter is inoperative.
In the checking of short wheel base model, Step Nos. 16 through 21 and Step Nos. 31 through 36 are omitted.

WIRING SYSTEM 8DÐ405
TERMINAL
CONNECTIONCHECK
OPERATIONCIRCUIT
NO. ITEM CONDITION
1 FRT door switchÐLH, RH ContinuityOpen door Continuity
Close door No continuity
2 RR door switchÐLH, RH ContinuityOpen door Continuity
Close door No continuity
3Ñ Ñ Ð Ð
4 Door lock key switchÐLH, RH Continuity Lock with key Continuity
5 FRT door lock switchÐLH, RH Continuity Lock Continuity
6 Tailgate switch ContinuityOpen tailgate Continuity
Close tailgate No continuity
8 AntiÐtheft horn Voltage Ð Approx. 12V
10 Battery Voltage Ð Approx. 12V
11 Door switch ContinuityUnlock with locking knob Continuity
Lock with locking knob No continuity
12 Engine hood switch ContinuityOpen engine hood Continuity
Close engine hood No continuity
13 Detect switch ContinuityUnlock with key Continuity
Lock with key No continuity
14 Door lock key switch Continuity Unlock Continuity
15 FRT door lock switchÐLH, RH Continuity Unlock Continuity
16 Tamper switch Continuity Ð No continuity
17 Ground Continuity Ð Continuity
18 Starter switch Voltage Starter switch ÒACCÓ Approx. 12V
19 Indicator light Voltage Ð Approx. 12V
20 Dome light Voltage Dome light ÒDOORÓ position Approx. 12V
21 Anti-theft relay Voltage Ð Approx. 12V
22 Starter relay VoltageMode switch ÒPÓ or ÒNÓ Approx. 12V
Clutch pedal depressed Approx. 12V
Connector Check Table
Check the antiÐtheft & keyless entry control unit harness side connector BÐ20 by using a circuit tester.

8DÐ406 WIRING SYSTEM
ID Code Registration
There are four kinds of ID codes which can be registered,
for which these three modes, ID code new registration, ID
code additional registration and ID code check, are
available.
ID Code New Registration
This procedure erases all registered ID codes and
registers a new received ID code instead.
Step Action Yes No
1. Open the driverÕs side door.
2. Turn the starter switch off.
Is the action complete?
Turn the starter switch to ACC position and then off three times
within five seconds after step 1.
Is the action complete within five seconds?
Close the door and then open it two times within ten seconds after
step 2.
Is the action complete within ten seconds?
1. Turn the starter switch to ACC position and then off five times.
2. Close the door and then open it.
NOTE: This step must be performed within ten seconds after step
3.
Is the action complete?
The control unit makes lock/unlock response once with interval of
one second.
Is the response complete?
Operate the lock or unlock button of transmitter within twenty
seconds after step 5.
Is the action complete?
The control unit makes lock/unlock response once with interval of
one second as ID temporary registration.
Is the response complete?
Operate the lock or unlock button of transmitter within twenty
seconds after step 7.
Is the action complete?
The control unit compares temporary registered ID code with
receiving ID code.
Is temporary registered ID code the same as receiving ID code?
The control unit makes lock/unlock response three times with
interval of one second.
Is the response complete?
The control unit erases all registered ID codes and registers new
ID code.
Is the registration complete? 1
2
3
4
5
6
7
8
9
10
11Go to Step 2
Go to Step 3
Go to Step 4
Go to Step 5
Go to Step 6
Go to Step 7
Go to Step 8
Go to Step 9
Go to Step 11
Finished
Go to Step 12Ñ
Finished
Finished
Finished
Ñ
Finished
Ñ
Finished
Go to Step 11
Ñ
Go to Step 13

WIRING SYSTEM 8DÐ407
Step Action Yes No
The control unit makes lock/unlock response once with interval of
one second.
Is the response complete?
The control unit makes lock/unlock response three times with
interval of one second.
Is the response complete? 12
13Finished
FinishedÑ
Ñ
Step Action Yes No
1. Open the driverÕs side door.
2. Turn the starter switch off.
Is the action complete?
Turn the starter switch to ACC position and then off three times
within five seconds after step 1.
Is the action complete within five seconds?
Close the door and then open it two times within ten seconds after
step 2.
Is the action complete within ten seconds?
1. Turn the starter switch to ACC position and then off three
times.
2. Close the door and then open it.
NOTE: This step must be performed within ten seconds after step
3.
Is the action complete?
The control unit makes lock/unlock response two times with
interval of one second.
Is the response complete?
Operate the lock or unlock button of transmitter within twenty
seconds after step 5.
Is the action complete?
The control unit makes lock/unlock response two times with
interval of one second as ID temporary registration.
Is the response complete?
Operate the lock or unlock transmitter within twenty seconds after
step 7.
Is the action complete?
The control unit compares temporary registered ID code with
receiving ID code.
Is temporary registered ID code the same as receiving ID code?
The control unit makes lock/unlock response three times with
interval of one second.
Is the response complete?
The control unit registers new ID code.
Is the registration complete? 1
2
3
4
5
6
7
8
9
10
11Go to Step 2
Go to Step 3
Go to Step 4
Go to Step 5
Go to Step 6
Go to Step 7
Go to Step 8
Go to Step 9
Go to Step 11
Finished
Go to Step 12Ñ
Finished
Finished
Finished
Ñ
Finished
Ñ
Finished
Go to Step 10
Ñ
Go to Step 13
ID Code Additional Registration
This procedure additionally registers a new received ID
code with holding registered ID codes. When total
number of registered ID codes and newly registered ID
code exceeds four, they are erased in order of older one.