lights ISUZU TROOPER 1995 Service Manual

8 -136 CHASSIS ELECTRICAL
MAP LIGHT SWITCH/BULB
~ INSPECTION
~~~ Check to see if there is any continuity between
the terminals and the body while operating the
map light switch.(Fig.8-171)
Repair
or replace the switch when the result of
inspection is found abnormal.
I" ~ [IT]
ron
0~/~ ~
'
~· 1 Body
n
ON 0 {)
OFF
Fig. 8-171
B REMOVAL
E) INSTALLATION
To install, follow the removal steps in the everse
order.
SEAT BELT SWITCH
~ INSPECTION
I~ l Check to see if there is any continuity b tween
the terminals of the seat belt switch. (Fig 8-173)
Replace the switch when the
result of ins ection
is found abnormal.
Switch operation
ON (unfasten the seat belt)
OFF (fasten the seat belt)
Preparation: Disconnect the battery ground cable. Fig. 8-173
Fig. 8-172
1.
Map light switch
• Pull the map light body downward to release
the
lock. (Fig. 8-172)
• Disconnect the connectors of the map light
and the sun roof switch.
2. Socket/bulb
• Turn the socket counterclockwise to remove
it.
3.
Bulb
• Pull out the bulb from the socket.
B REMOVAL AND INSTALLATION
1++1 Refer to Section 10 "BODY", for "SEAT ELT"
removal and installation steps.
WARNING BUZZER
The warning buzzer sounds to remind the dr ver to
fasten seat belts, if the key was left in the tarter
switch,
or if the headlights were left on. (Fig. -174)
Seat belt warning light
Seat belt
sw
Starter sw
8
Warning buzzer
DoorSW (Driver
side)
Fig. 8-174
..

CHASSIS ELECTRICAL 8-137
Warning function
Operational conditions
The
warning light in the meter assembly turned on about 6
seconds
from the moment the starter switch is turned on.
Fasten the seat
belt
The buzzer sounds for about 6 seconds when the starter switch
is turned on with the seat belt switch on (when the seat belt is
not used).
Key left in The
buzzer sounds when both the key remind switch and the
FRT
door switch -LH are turned on.
starter switch
To
stop the sound of the buzzer, turn on the starter switch.
Taillights left on The
buzzer sounds when the starter switch is turned
from the
"on• to "off" position while the taillights are on.

8 -172 CHASSIS ELECTRICAL
CRUISE CONTROL
GENERAL DESCRIPTION
The circuit consists of the starter switch, cruise main switch, control switch, control unit, pump and actuator,
brake switch, clutch switch (M/T),
mode switch (Nf), vehicle speed sensor (incorporated into speedometer),
and indicator lights.
The cruise
control system keeps the vehicle running at a fixed speed until a signal canceling this speed is
received.
When the vehicle is in a running state with the main switch on, the battery voltage is applied to the control
unit. When a signal from the control switch is input into the control unit, while the vehicle is in this state, the
cruise control actuator is activated
to operate the system.
Also,
while the system is operating, the "AUTO CRUISE" indicator light in the instrument panel cluster lights
up.
Refer
to Section 98 "CRUISE CONTROL" for detail.
OPERATION OF CRUISE CONTROL MAIN SW AND CRUISE MAIN RELAY
1. Main SW is at ON position
for an instant after being
pressed
CRUISE MAINSW
n m
OFF OFF
~~ . !-':··a··---
~: 0 ON NON
n~
£Jr
CRUIS MAIN ~ELAvl .c~ I
n n(b
-
STARTERSW
¢:!)
fi
2. Main SW returns to
NEUTRAL position from
ON position instantly
CRUISE MAINSW
CRUISE MAIN RELAY
STARTERSW
NOTE: Arrow marks H c:::::> H indicate the direction of current
Fig. 8·223
3. Main SW returns to
NEUTRAL position from
OFF position after being
set
to OFF
CRUISE MAINSW
CRUISE MAIN RELAY
STARTERSW
..

8 -178 CHASSIS ELECTRICAL
ANTI-LOCK BRAKE SYSTEM (ABS)
GENERAL DESCRIPTION
The circuit consists of the starter switch, stoplight switch (vehicle w/o cruise control), brake switch (vehicle
with cruise control), hydraulic unit, electronic brake control module, wheel speed sensor, G sensor, ABS and
4WD indicator, 4WD switch and data link connector.
When the service brake is applied while in the running mode,
the EBCM (Electronic Brake Control Module)
judges
which wheel is about to lock by using the wheel rotation speed signals sent from the four ABS speed
sensors at the
front and rear wheels. And the brake fluid pressure applied to the four wheels is controlled by
a hydraulic unit to prevent the wheels from locking.
Based on the wheel rotation speed signals
input from the ABS sensor, the EBCM sends out signals to the
solenoid valve in the hydraulic unit
to increase, maintain or decrease the brake fluid pressure. The solenoid
valve uses this signal
to control the fluid pressure which is applied to the calipers of the disk brakes of the
front wheels. (The system also controls at the same time the fluid pressure applied to the rear wheels.)
• EBCM (Electronic brake control module)
The EBCM uses the signals sent from the speed sensor to control the operation of the hydraulic unit.
When any malfunction occurs in the ABS, the
EBCM activates the fail-safe fuction while turning on the
ABS warning light.
• Hydraulic unit
The hydraulic unit consists of the motor, plunger pump, solenoid valve, and fluid pressure control
valves. The exterior
of the unit has a relay box consisting of the motor relay and valve relay. Three
solenoid valves, the
two of which are provided at the front wheels and the one at the rear wheels, control
the fluid pressure
of these wheels.
• Speed sensor
The speed sensor consists of the sensor and the rotor. It sends the EBCM the AC voltage generated by
the rotation of the rotor as the vehicle speed signal. ~
• G-sensor
The G-sensor, installed inside the center console, sends out signals to the EBCM by detecting the
decelerating speed
of the vehicle.
• ABS warning light
The ABS warning light in the instrument panel, lights up when any malfunction occurs in the ABS. It also
lights up
with the starter key at the "ON" position, as a self-check.
Refer
to Section 5A4, "ANTI-LOCK BRAKE SYSTEM" for detail.
II

CHASSIS ELECTRICAL 8-185
REAR WHEEL ANTI-LOCK BRAKE SYSTEM (RWAL)
GENERAL DESCRIPTION
The circuit consists of the starter switch, stoplight switch (vehicle w/o cruise control), brake switch (vehicle
w/cruise control). RWAL controller, RWAL speed sensor, RWAL valve, brake differential switch, 4WD switch,
parking brake
SW, indicator light (RWAL, 4WD, BRAKE), and test connector.
In this system, when the service brake is applied the RWAL controller judges the wheel rotation difference
signals which have been sent from the RWAL speed sensor at the rear axle differential. The anti-lock valves
control
the brake fluid pressure which is applied to the rear wheels to prevent the wheels from locking.
When starting the engine, the RWAL indicator in the instrument panel lights up at the same time as the brake
indicator
to inform the driver that the system is operating normally. (The light goes off after two seconds.)
Refer
to Section 5A3, "RWAL (REAR WHEEL ANTI-LOCK BRAKE SYSTEM)" for detail.

8-264 CHASSIS ELECTRICAL
STARTER SWITCH
Refer to "START AND CHARGING" in this section.
DOOR MIRROR SWITCH ASSEMBLY
(CONTROL SWITCH, FOLDING
SWITCH
AND DEFOGGER SWITCH)
(FIG. 8-305)
The door mirror switch is made up of the control
switch that controls the vertical and horizontal move­
ment of both mirrors, the folding switch, and the
defogger switch.
The control switch consists of six switches, two of
which are used to select a mirror on either the left or
the right side, and the remaining four switches control
vertical or horizontal mirror movement.
The folding switch contains two switches, and their
contacts are changed over each time these switches
are depressed. The direction of the current flow to the
motor in the mirror is controlled to perform the fold­
ing and returning action of the mirror.
When depressing the defogger switch, the defogger
indicator lights up to inform the driver that the mirror
built-in heater is operating.
I B-551 I B-561
i I I
!;l ~
LJ -J
I
I[~(@)~] J
Fig. 8-305
[!) INSPECTION
IL•I Check to see if there is any continuity between
the connector terminals while operating the
door mirror switch. (Fig. 8-306)
Repair or replace the switch when the result of
inspection is found abnormal.
I B-571
r .·~·· I ~ru·l
~~J!]}I ~ rroo~~l]
i !)~~1,1
a m
I ~ I ffi ;!sl7l6lsl41 ~ l~ lll"L•I'J'I•J ~~~
~' I J )
~0 ls-ssl IB-561 IB-571 Switch
N 4 9 1 8 10 7 5 2 3 8 7 6 5 4 3 2 5 4 3 6 2 o.
6. (Up) ~ ).. ...( ) .(")
'7 (Down) 0 c .) D RH c _.) Control I> (Right) 0 ( ) .()
~ switch 6. (Up) c ~ -o ()-f-(l-
'7 (Down) 0 ( ) D LH c _.) I> (Right) (.. c ) 0
Folding Folding o-f-0 o--()
~ switch
Returning ()-Lo 0 0
Defogger ON o-'-0-
0
~ switch OFF 0 D
Fig. 8-306
•

8-270 CHASSIS ELECTRICAL
ANTI-THEFT SYSTEM
GENERAL DESCRIPTION .......
The circuit consists ofthe starter switch, anti-theft controller, anti-theft horn, front door and tailgate key switch
(detect and tamper switch),
door lock (&power window) switch, door lock actuator for each door, engine hood
switch, clutch start switch (MfT),
ANTI-THEFT indicator light and mode switch (AfT). The system operates as
follows: After locking the starter switch and removing the starter key (this sets the alarm),
ifthe door is unlocked
in any
way other than with the proper key, the headlights start flashing, the horn sounds, and the starter circuit
is disabled. (However,
the engine hood and all the doors must be locked and closed.)
Once the system has been placed in the warning or alarm condition, it can be released only when the starter
switch is shifted
from "OFF" to "ACC" by the starter key, or when the lock of the front door or the tailgate is
released (to activate the detect switch)
by the starter key.
OPERATION OF ANTI-THEFT SYSTEM
'
'
CLUTCH START m
SW(M/Tiw
' '
'
BATIERY(+)
0 ST
STARTER sw
BATIERY(+)
L------
STARTER RELAY
' ' (MIT):
'
'
'
HORN
(SOUND)
ANTI-THEFT CONTROLLER
BATIERY(+)
LIGHTING
RELAY
"ON"
HEAD­LIGHT (FLASH)
NOTE: Arrow marks u ~ u indicate the direction of current
Fig. 8-314
•

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.

8-284 CHASSIS ELECTRICAL
ANTI-THEFT INDICATOR
~ INSPECTION
With the battery (+) terminal connected to the
indicator
terminal 9 ~l'ld the H terminal to the
indicator
terminal 10[EIJ, check to see if the
indicator
lights up. (Fig. 8-327)
Terminal No. 9 10
Continuity
Fig. 8-327
B REMOVAL (FIG. 8-328)
Preparation: Disconnect the battery ground cable.
4. Instrument panel cluster assembly
-====-==============~!!;!;::,..
Fig. 8-328
5. Anti-theft
indicator
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. Anti-theft indicator
• Remove 2 screws.
B INSTALLATION
To install, follow the removal steps in the reverse
order.
ANTI-THEFT CONTROLLER
B REMOVAL (FIG. 8-329)
Preparation: Disconnect the battery ground cable.
Fig. 8-329
1. Anti-theft controller
• Disconnect the connector.
• Remove 2 nuts.
B INSTALLATION
To install, follow the removal steps in the reverse
order.
STARTER SWITCH
CLUTCH START SWITCH
MODE SWITCH
Refer to "START AND CHARGING" in this section.

8-288 CHASSIS ELECTRICAL
METER AND WARNING/INDICATOR LIGHT
GENERAL DESCRIPTION
The circuit consists of the starter switch, meter assembly, vehicle speed sensor, clutch switch, transmission
switch, lighting switch,
turn signal switch, thermo unit, oil pressure unit, Engine Control Module, fuel tank unit,
4WD
SW, oil pressure switch, parking brake switch, brake fluid switch, seat belt switch and illumination
controller.
The meter ASM contains the speedometer, tachometer, voltmeter, engine coolant temperature gauge, oil
pressure gauge, fuel gauge and warning/indicator lights.
The meter warning/indicator lights and
their bulb sockets are a unit, they are installed from the back of the
speedometer assembly.