relay ISUZU TROOPER 1995 Workshop Manual

STARTER SWITCH
Refer to "START AND CHARGING" in this section .
........,. POWER WINDOW SWITCH
DRIVER SEAT SIDE
This switch can be used to open and close all the
windows on both front and rear sides.
Only the switch panel at the driver seat is provided
with switches that operate the other windows.
And, only the driver's window has a "one touch"
mechanism for rolling the window all the way down
automatically. (Fig.8-202)
IL'ti'l Circuit inspection of the driver seat side
power window switch
~ Remove the connectors of the driver's power
window switch, and check the voltage and
continuity between the harness side connector
terminals. (Fig.
8-203)
[QI]
~B
lls!&!7!sl9 100
Harness side
Con- Ter-
Wire
Item to be
nectar minal Connected to
No. No. color checked
1 8 Ground
5
LNJ FRT Power window Continuity
D-5 6 L motor-LH
7 L/8
Power window relay
Voltage
10 LG/W Fuse
C-18 (20A)
D-30
5 R!Y Power window SW Continuity
(FRT-RH,
RR-RH, LH)
Fig. 8-203
CHASSIS ELECTRICAL 8-165
Fig. 8-202
I D-30l
~~~
&171&19~0
Harness side
Connecting Checking
Standard
terminal conditions
1-Ground
-Continuity
5-6
7-Ground Starter SW "ON"
Approx. 12V
10-Ground -
5-Ground -Continuity

8-166 CHASSIS ELECTRICAL
1+•1 REMOVAL (Fig. 8-204) FRONT PASSENGER SEAT SIDE
Preparation: Disconnect the battery ground cable. This
switch can be used to open and close the front ~
passenger's window.
Fig.
8-204
1. Switch
• Pull out the switch.
• Disconnect two connectors.
B INSTALLATION
The switch is designed not to function if the lock
switch on the driver seat side is depressed. {Fig. 8-
205)
Fig. 8-205
To install, follow the removal steps in the reverse
order.
IL•I Circuit inspection of the front
1 tW,j passenger power window switch
Remove the switch connectors to check the
voltage and the continuity between the
h~rness
side connectors. (Fig. 8-206) !
I D-141
., = ,._
~3f4l:l j1s]sJ7jsl9J1~
Harness side
Ter-
I
minal Wire
Connected to Item to be Connecting Checking Stand~rd
No. color
checked terminal conditions
1
8 Ground Continuity 1-Ground -Contin~ity
2 R!Y Front power window 2-Ground
sw Voltage Starter SW "ON" Approx; 12V
5 LIB Power window relay 5-Ground
6
L!Y Front power window Continuity 6-7 -Continuity
7
BR/Y motor-RH
Fig.
8-206
•

CHASSIS ELECTRICAL 8-167
B REMOVAL (Fig. 8-207) REAR -LEFT AND RIGHT SIDES
Preparation: Disconnect the battery ground cable. This
switch can be used to open and close the rear
windows on the left and right sides.
This switch is designed not
to function if the driver's
window side lock switch is depressed. (Fig. 8-208)
1. Switch
I
--
Fig. 8-207
1.
Switch
• Remove the switch by pushing the spring
with the tip of a screwdriver.
• Disconnect connector. Fig.
8-208 (1!] INSPECTION
I++IJNSTALLATION
I til Circuit inspection
To install, follow the removal steps in the reverse Remove the switch connectors to check the
order. voltage and the continuity between the harness
'-"' side connector terminals. (Fig. 8-209)
I D-2211 D-271
m
Harness side
Ter- Wire
Item to be Connecting Checking
minal Connected to Standard
No. color
checked terminal conditions
2
RN Front power window Voltage 2-Ground
Starter SW "ON" Approx. 12V
sw
3 B
Ground Continuity
1-Ground -Continuity
4 LIB Power window relay Voltage 4-Ground
Starter SW "ON" Approx. 12V
5 L/R Rear power window Continuity 5-6 -Continuity
6 BR/R Motor LH/RH
Fig. 8-209

8-168 CHASSIS ELECTRICAL
1+•1 REMOVAL (Fig. 8-210)
Preparation: Disconnect the battery ground cable.
Fig.
8-210
1. Switch
• Remove the switch by pushing the spring
with the tip of a screwdriver.
• Disconnect connector.
B INSTALLATION
To install, follow the removal steps in the reverse
order.
POWER WINDOW MOTOR-DRIVER
SEAT SIDE
(b!] INSPECTION
lt!l Before checking the motor, be sure to start
check the circuit
through the driver's power
window switch connector I]]] and the circuit
between drivers seat side
power window switch
and
the power window relay.
If the motor does not operate correctly, either
the motor or the circuit is defective.
1. Circuit inspection between fuse and the
ground, circuit breaker and the power
window switch-LH (Fig. 8-211)
1. Check to see if fuse C-4 (10A), circuit breaker
and
power window relay is normal. Repair or
replace the defective parts.
2. Disconnect the front power window SW-LH
connector.
3. Check to see if battery voltage applied at
71 D-5 I and the ground when starter switch is
"ON" position.
Repair a
poor connection of the connectors or
aj opel circuit between 1! B-421 and 2 "B-37!1,
4 B-37 and 71 D-5 I , fuse C-4 and 1 B-37 ,
3IB-37I and IB-191·
Harness side
Connecting
terminal
5 (Lf\N) 6 (L) Operation
DOWN
UP
2. Inspection oft:~;i:~, seat side j
1 otor
Remove the motor connector and apply attery
voltage
to the motor side connector term als to
check its function. (Fig. 8-212)
Replace the
motor when the result of insp ~ction
is found abnormal.
~~ , .-1M .
Llf'~
I
I
~
~
~o. 1 ~ D
0 p I
DOWN ~ (9
UP 8 (tJ
Fig. 8-212
B REMOVAL
Preparation: Disconnect the battery ground able.
1. Window regulator assembly
• Refer to the removal of "Window reg lator
and glass" in Section 10, Body.
2. Power window motor
• Remove three screws. (Fig. 8-213)
•

2. Power window motor
W Caution:
Fig. 8-213
1. Window
regulator
assembly
When removing the motor from the regulator,
be careful
not to get injured by the strong
repellent force of the regulator spring.
B INSTALLATION
To install, follow the removal steps in the reverse
order.
FRONT PASSENGER SEAT SIDE
~ INSPECTION
Before checking the motor, be sure to start checking
the circuit
through the front passenger's switch
connector
JD-141 and the circuit between driver seat
switch/power
window relay and the front passenger
switch.
If the motor will not function correctly, either the
motor or the circuit is defective.
1. Circuit inspection of the front passenger
seat side
window
Disconnect the switch connector and apply
battery voltage
to the harness side connector
terminals
to check its function. (Fig. 8-214)
I o-141
_.ar; -=-_r;._ 11,T z"tiM 3T ,11 ll slsl71&1911o[l
Harness side
Connecting terminal
Direction
of
6(LN) 7 (BR/Y) Operation
I::) '+I DOWN
\:!:) I=) UP
Fig.
8-214
CHASSIS ELECTRICAL 8-169
2. Circuit inspection between front power
window switch-LH/power window relay
and
front passenger power window
switch
1. Disconnect the front passenger switch
connector
ID-141.
2. Check to see if battery voltage applied at
2ID-14I,5ID-14I andthegroundwhenstarter
switch is "ON" position.
Repair a
poor connection of the connectors or
aj opT circuit between 2ID-14Iand 12IH-1BI,
5 D-14 and 4JH-19J.
3. Inspection of the front passenger
window motor
Disconnect the motor connector and apply
battery voltage
to the motor side connector
terminals
to check its function. (Fig. 8-215)
Repair
or replace the motor when the result of
inspection is found abnormal.
D.~Terminal No. 1rect1on
of operation
DOWN
UP
Fig. 8-215
B REMOVAL
1 2
8
8
Preparation: Disconnect the battery ground cable.
1. Window regulator assembly
• Refer to the removal of "Window regulator
and
glass" in Section 10, Body.
2. Power window motor (Fig. 8-216)
• Remove three screws.
2. Power window motor
Fig. 8-216

8-170 CHASSIS ELECTRICAL
W Caution:
When removing the regulator from the motor,
be careful not to get injured by the strong force
of the regulator spring.
B INSTALLATION
To install, follow the removal steps in the reverse
order.
REAR-LEFT SIDE
~ INSPECTION
Before checking the motor, be sure to start checking
the rear window switch (left) connector lo-221 and
the circuit between
front power window switch-LH/
power window relay and the rear power window
switch-LH.
If the motor will not operate correctly, either the
motor or the circuit is defective.
1. Circuit inspection of the rear window
switch circuit -left side
3. Inspection of the rear window motor -
left side
Disconnect the motor connector and apply ~
battery voltage to the motor side connector
terminals to check its function. (Fig. 8-218)
Repair or replace the motor, when the result of
inspection is found abnormal.
@J
p
&)
lo-2ol
0
~
0 1 2 1rect1on
of operation
DOWN El 8
UP E) G
Fig. 8-218 Disconnect the switch connector and apply
battery voltage to the harness side connector
terminals to check its function. (Fig. 8-217) 1••1 REMOVAL
Harness side
Connecting
terminal Direction of
5 (L/R) 6 (BR/R) Operation
1+1 ,_) UP
1-) DOWN
Fig. 8-217
2. Circuit inspection between front power
window switch-LH/power window relay
and rear power window left side switch
1. Disconnect the rear power window switch-LH
connector lo-221.
2. Check to see if battery voltage applied at
41 D-221, 2 I D-221 and the ground when starter
switch is "ON" position.
Repair a
poor connection of the connectors or
an~n circuit between 4ID-22I and 1IH-29I,
2 ~and 2 IH-281.
Preparation: Disconnect the battery ground1cable.
1. Rear window regulator assembly
• Refer to the removal of "Window regulator"
in Section 10, Body.
2. Power window motor (Fig. 8-219)
• Remove three screws.
Fig.
8-219
B INSTALLATION
1. Rear window regulator
assembly
To install, follow the removal steps in the reverse
order.
•

REAR -RIGHT SIDE
~ INSPECTION
Before checking the motor, be sure to start checking
the rear
power window switch (right) harness side
connector
I D-271 and the circuit between front power
window switch-LH/power window relay and the rear
power window switch-RH.
If the motor will not operate correctly, either the
motor or the circuit are defective.
1. Circuit inspection of the rear window
switch -right side
Disconnect the switch connector and apply
battery voltage
to the harness side connector ter­
minals to check its function. (Fig. 8-220)
~
~
Harness side
Connecting terminal
Direction
of
5 (L/R) 6 (BR/R) Operation
1,+1 1.- UP
(-1 I+) DOWN
Fig. 8-220
2. Circuit inspection between front power
window switch-LH/power window relay
and rear
power window right side switch
1. Disconnect the rear power window switch­
RH connector I D-271 .
2. Check to see if battery voltage applied at
41 D-271 , 21 D-271 and the ground when starter
switch is
"ON" position.
Repair a poor connection
of the connectors or
an open circuit between 410-271 and 1IH-35I,
2lo-21l and 2IH-34I.
3. Inspection of the rear window motor -
right side
Disconnect the motor connector and apply
battery voltage
to the motor side connector
terminals
to check its function. (Fig. 8-221)
Repair or replace the motor when the result of
inspection is found abnormal.
CHASSIS ELECTRICAL 8-171
D~
. TerminaiNo. 1rect1on
of operation
DOWN
UP
Fig. 8-221
1
ci)
8
1••1 REMOVAL AND INSTALLATION
2
l••l Refer to the removal and installation steps of
the rear power window motor-left of this
section.
POWER WINDOW RELAY
~ INSPECTION
lt!!.l Check to see if there is any continuity between
the relay terminals. (Fig.
8-222)
When the result of inspection is found
abnormal, replace the relay.
®-@ ....... No continuity
(When applying battery voltage between
CD and
@)
®-@ ....... No continuity
Note:
For the relay removal, refer
to "Connector
Handling"
under "NOTES FOR WORKING ON
ELECTRICAL ITEMS"
in this section.
Fig.
8-222

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
..

"TI ~· 00 I N N .,..
(
(
1-10 VEHICLE
SPEED
SENSOR
(METER!
CRUISE
CONTROL
SW,
CRUISE
CANSEL
SW,
(COMBINATION SWl
CRUISE
MAIN, AUTO
CRUISE
INDICATOR
LIGHT
'"
CLUTCH
PEDAL
(MfTI
BRAKE
PEDAL
RELAY
& FUSE
BOX
(FL-1
FL-2) PUMP
& VSV-------__
BATTERY
. '/
)",...
H-41
CRUISE
CONTROL
UNIT
·""·

'~~/{' /l/
'
4/
·,,_
DIODE
B-45
FUSE
BOX
(C-3,
C-4,
C-10,
C-14)
CRUISE
CONTROL
MAIN
SW
(
~ ::u ~ r-0 (") ~ 0 z
0 ::t > (/) (/) a; m ,.. m !l ::D 0 )> r­eo I ... ..... w

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