sensor ISUZU TROOPER 1995 Workshop Manual

(1!] INSPECTION (FIG. 8-372)
Battery
Fig. 8-372
1. Connect the vehicle speed sensor connector 1
IM-101 to the battery (+)terminal and 2 IM-101 to
the (-)terminal.
2. Connect a resistance of 1.3k ohm to Sk ohm ( 1/4W
or more) between connectors 1 ~ and 3
IM-101.
W CAUTION: Be extremely careful not to con­
nect the battery(+)
terminal to the
connector
3IM-1ol.
This may damage the vehicle
speed sensor.
3. Rotate the shaft of the vehicle speed sensor
1~1 slowly and measure the voltage at both ends
with a digital tester.
The voltage,
with one rotation of shaft,
fluctuates
four times in the following range
:10 to 14V <-> 2Vor less.
Replace the sensor when the resu It of i nspec­
tion is found abnormal.
CHASSIS ELECTRICAL 8-329
B REMOVAL (FIG. 8-373)
Preparation: Disconnect the battery ground cable.
1. Vehicle speed sensor
Fig. 8-373
1. Vehicle speed sensor
• Disconnect the connector.
• Remove the vehicle speed sensor body by
rotating it.

8-330 CHASSIS ELECTRICAL
B INSTALLATION TRANSMISSION SWITCH
To install, follow the removal steps in the reverse ll•IINSPECTION
order, noting the following points.
1. Tighten the vehicle speed sensor to the specified
torque. Transmission switch (1-2)
~~~ Torque N·mUb·ft) j
CLUTCH SWITCH
~ INSPECTION
27 (20)
1. Check continuity between connector terminals.
(Fig. 8-37 4)
2. Check the push rod operation.
Replace the clutch switch when the result of inspec-
tion is found abnormal. Fig. 8-375
1. Check continuity between connector terminals.
I B-161 (Fig. 8-375)
Switch operation
Depress
clutch pedal (Push rod out)
Fig. 8-374
Replace the clutch switch when the result of inspec­
tion is found abnormal.
THERMO UNIT
~ INSPECTION
11!!.1 Use a circuit tester to measure the thermo unit
resistance. (Fig. 8-376)
Fig. 8-376

8-382 CHASSIS ELECTRICAL
SUPPLEMENTAL RESTRAINT SYSTEM (SRS)-AIR BAG
The system consists of the starter switch, Diagnostic Energy Reserve Module (OERM), dual pole arming
sensor,
SRS coil assembly, inflator module (driver & passenger), forward sensor and warning light.
SRS is mainly comprised of the deployment loop and the DERM.
The main function of the deployment loop is to flow current into the inflator modules inside the steering
wheel (driver side) and the passenger side instrument panel (passenger side) to inflate the air bag. The
forward sensor
(LH and /or RH) gets activated by a shock caused by collision during running of a vehicle, the
current
from the battery flows into the inflator modules through dual pole arming sensor, so that the air bag
is
inflated.
The DERM supplies the current to the deployment loop to ensure that the air bag is inflated, if the power
circuit between battery and deployment loop is cut off by the shock of collision.
In
addition, the DERM monitors a voltage drops between components, and if the voltage drops below the
specified
value, the driver is alerted by the "AIR BAG" warning light in meter assembly.
Refer to Section 9J "SUPPLEMENTAL RESTRAINT SYSTEM (SRS)-AIR BAG" for details.
OPERATION OF THE CIRCUIT
DRIVER
INFLATOR MODULE
FOWARD
SENSOR-LH
D
D
STARTER SW
D
1
DUAL POLE ARMING SENSOR
PASSENGER
INFLATOR
MODULE
FORWARD
SENSOR-RH
NOTE: Arrow marks "c::::>" indicate the direction of current
Fig. 8-438
•

(
PASSENGER
INFLATOR
MODULE
H-14
RELAY
& FUSE
BOX
H-50
(Fl-l,FL-21
"T1 ce·
BATTERY
00 I .J>. ~
C-49
FORWARD
SENSOR
(RHI
FORWARD
SENSOR
(LHI
(
(
SRS
COIL
ASSEMBLY
DRIVER
INFLATOR
MODULE
FUSE
BOX
(C-1,C-21,C-22,C-23,C-241
C-48
CONDENSOR
!NCI
;g ~ r-0 0 ~ -0 2
0 ::t ):lo en
en c;; m r­m 0 -t :a ~ r-eo I w co w

8-384 CHASSIS ELECTRICAL
CIRCUIT DIAGRAM
BODY ENG. FRAME
• Terminals marked with a star(*) are gold plated.
• J/C ; Joint Connector
fi "' 6 ;:-~ ~t; ~ >-t;: ~g " "' u"' ::: .. -~ 0 ,. .. ~: zw _w
"" 0" w., .. t. i:: =:: !(o frl@. ~g cl;
0.15R
~ ~ :e 0
0 ~
~
DUAL POLE ARMING SENSOR
~ " ~
@2)JtC·1
~J/C-2
3W/G
.. "' 0
ID "' 0
C-1 10A STARTER RELAY
BODY-FRT ~~~----------------------------------~~----~----------------------------~--------~
BODY-FRT 11~------------------------------------------------------------------------------------------__J
Fig. 8-440
H-..
•

---------------~-~---
CRUISE CONTROL 9B-1
SECTION 98
CRUISE CONTROL
CONTENTS
General description ................................ .
Parts location .......................................... .
Circuit diagram ....................................... .
Diagnosis ................................................. .
On-vehicle service ................................. ..
Brake switch adjustment ................ ..
Clutch switch adjustment ................ .
Actuator
cable adjustment .............. .
Starter switch ................................... .
Cruise control main switch .............. .
GENERAL DESCRIPTION
98-1
9B-3
98-4
9B-7
98-28
9B-28
9B-28
9B-28
9B-28
9B-30 Cruise
control
switch
(combination switch) ........................ 98-31
Cruise control unit .......................... ... 9B-32
Pump
& actuator .................. .............. 9B-34
Brake switch ....................................... 9B-36
Clutch switch .............................. ....... 9B-36
Mode switch .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . 9B-37
Vehicle speed sensor
(incorporated in speedometer) ......... 9B-38
Diode
.. .. .. .. .. .. . .. .. .. .. .. . .. .. .. .. .. .. .. .. .. .. . .. .. .. 9B-38
Cruise control main relay .................. 9B-39
The circuit consists of the starter switch, cruise control main switch, cruise control switch, cruise control unit,
pump &actuator, brake switch, clutch switch (M/T), mode switch (A/T), vehicle speed sensor (incorporated into
the speedometer) and indicator light.
The cruise control keeps
the vehicle running at a fixed speed until a signal canceling this fixed speed is received.
When the main switch "AUTO CRUISE" is turned on with the vehicle in the running mode, the battery voltage
is applied
to the control unit. When a signal from the control switch is input to 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 indicator box lights up.
1. SET /COAST SWITCH FUNCTION
1) SET function: When the SET/COAST switch
is pressed and released
with the main switch
on, the speed at
which the vehicle is running
at that moment is stored in the memory, and
the vehicle
automatically runs at the speed
stored.
2) COAST-DOWN function: When the SET/
COAST switch is kept on while the vehicle in
running, the vehicle decelerates
during that
time. The speed at which vehicle is running
when the control switch is turned off is stored
in the
memory, and the vehicle automatically
returns
to the stored speed.
3) Tap-down function: When the SET/COAST
switch is turned on and off instantaneously
while the vehicle is running, the vehicle decel­
erates a mile for each on/off operation. The
vehicle speed at
which the vehicle was run­
ning when the SET/COAST was turned off last
is stored in the
memory, and the vehicle auto­
matically returns to this stored speed.
2. RESUME/ ACCEL SWITCH FUNC­
TION
1) Resume function: When the RESUME/
ACCEL switch is turned
on/off after the system
is
temporarily deactivated by pressing the
brake or clutch pedal while the vehicle is
running,
the vehicle resumes. The speed
stored before the system
was released.
2) Accelerate function: When the RESUME/
ACCEL switch is kept on after the system is
released completely, the vehicle accelerates
its speed
during that time. The vehicle speed
at
which the vehicle was running when the
switch
was turned off is stored in the memory,
and the vehicle automatically returns to this
speed.
3) Tap-up function: When the RESU ME/ACCEL
switch is
turned on and off instantaneously
while the vehicle is running, the vehicle decel­
erates a mile for each on/off operation. The
vehicle speed at
which the vehicle was run­
ning when the switch was turned off last is
stored in the
memory, and the vehicle auto­
matically returns to this stored speed.

, cCi" <0 CD I ....
( (
1-10
CRUISE CONTROL SW,
CRUISE
CANSEL SW,
!COMBINATION
SWl
VEHICLE
SPEED
SENSOR
!METER}
i
CRUISE MAIN, AUTO CRUISE
INDICATOR LIGHT
CLUTCH
PEDAL
IM[T)
~
. //
BRAKE PEDAL
~~
RELAY &
FUSE BOX
B-2
vi"""
(FL-1
FL-2}
C-3g\j;~
PUMP&VSV
RELAY:
CRUISE
MAIN BATTERY--
/
H-41
··,.
,:-,
\
·.,"-
~DIODE
8-45
'"-FUSE
BOX IC-3, C-4, C-10,
C-14)
CRUISE
CONTROL
MAIN
SW
(
~ ~ 0 n ~ 0 z
n ::D c c;; m n 0 ~ 0 r-fD OJ I w

98-8 CRUISE CONTROL
QUICK CHART FOR POSSIBLE CAUSE
1. Cruise control inoperative
CHECK POINTS POSSIBLE CAUSE
Fuse C-4 (10A) Burned out
Cruise control main relay Defective circuit inside relay
Main switch
Contact point does not switch to ON
SET/COAST SW Contact point does not switch to ON
Clutch switch (M/T)
Contact point does not switch to ON
Brake switch Normal close side of point does not switch to ON
Pump & VSV Defective valve or vacuum pump (inoperative)
Vehicle speed sensor Open or short circuit
Vacuum hose Disconnected, Bent, Crack, Crush
Actuator Restriction
or out of link
Cable
harness Disconnected connector, Open circuit
Cruise
control unit Defective circuit inside control unit
2. Cruise speed unstable
CHECK POINTS POSSIBLE CAUSE
Vehicle
speed sensor Open or short circuit
Vacuum hose
Disconnected, Bent, Cracked, Crushed
Pump & VSV Defective valve (leakage)
Actuator Restriction,
defective or disconnected
Cruise
control unit Defective circuit inside control unit
Accelerator cable
Incorrect free play of accelerator pedal COUNTERMEASURE
Replace
Replace
Repair or replace
Refer to cruise control
SW
inspection
Refer
to clutch SW
inspection
Refer
to brake SW
inspection
Replace
Refer to speedometer
inspection
Repair
or Replace
Repair or Replace
Repair
Replace
COUNTERMEASURE
Refer to speedometer
inspection
Repair
or Replace
Replace
Repair or Replace
Replace
Readjust
•

-------------------
CRUISE CONTROL 98-9
3. Cruise control cancels
CHECK POINTS POSSIBLE CAUSE COUNTERMEASURE
Clutch switch
(M/T) Unstable point contact Replace
Incorrect
switch position Readjust
Clutch
pedal does not return fully Check and repair return
spring
Brake switch
Unstable normal close point contact Replace
Incorrect
switch position Readjust
Brake
pedal does not return fully Check and repair return
spring
Car speed sensor
Open or short circuit Refer to speedometer
inspection
Pump& VSV Defective valve (leakage) Replace
Cruise control unit Defective circuit inside control unit Replace
4. RESUME inoperative
5. ACCEL or TAP-UP inoperative
CHECK POINTS POSSIBLE CAUSE COUNTERMEASURE
Resume switch
Contact
point does not switch to ON Refer to cruise control
SW
inspection
Cable harness Open circuit for resume switch circuit Repair
Cruise
control unit Defective circuit inside control unit Replace
6 COAST or TAP-DOWN inoperative ,,
CHECK POINTS POSSIBLE CAUSE COUNTERMEASURE
SET/COAST
SW Poor point contact Refer to cruise control
SW
inspection
Cruise
control unit Defective circuit inside control unit Replace
Cable
harness Open circuit for coast switch circuit Repair

98 -16 CRUISE CONTROL
2. CRUISE SPEED CANNOT BE SET. (CHART 2)
• DISCONNECT THE CONNECTOR OF THE CRUISE
CONTROL SWITCH !COMBINATION SWITCH).
•
TURN THE STARTER SWITCH AND CRUISE CONTROL MAIN SWITCH ON.
• IS THERE ANY BATIERY VOLTAGE APPLIED BETWEEN
THE
CRUISE CONTROL SWITCH HARNESS SIDE
CONNECTOR 9IB-52I AND THE GROUND?
•
CHECK THE FOLLOWING:
@ INSPECTION OF THE PUMP & VSV AND THE
CIRCUIT @ INSPECTION OF THE CRUISE CONTROL SWITCH AND THE CIRCUIT
@ INSPECTION OF THE MODE SWITCH, CANCEL SWITCH !A/Tl CLUTCH SWITCH, CANCEL SWITCH (MIT} AND CIRCUIT @ INSPECTION OF THE VEHICLE SPEED SENSOR AND CIRCUIT @ INSPECTION OF THE GROUND CIRCUIT OF THE
CRUISE CONTROL UNIT. • ARE THE RESULTS OF INSPECTION NORMAL?
IF NO TROUBLE IS FOUND, REPLACE
THE
CRUISE CONTROL UNIT
VSV: VACUUM SWITCHING VALVE CHECK
THE
POWER CIRCUIT AND REPAIR IT IF
NECESSARY.
(REFER TO CHART 1)
•