key battery ISUZU TROOPER 1995 Owner's Guide

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.

8-280 CHASSIS ELECTRICAL
Connector Checking Procedure
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Terminal
Connection Check Operation Circuit
Remarks
No.
condition
1 Door switch Continuity Open door Continuity Ground
( FRT-LH & RH) RR-LH & RH Close door No Continuity Tailgate
2 Tamper switch
Continuity
-No Continuity If continuity to
ground -no good
3 -
-I - -
4 ---
-
5 ----
6 Engine hood switch Continuity Open engine hood Continuity Ground
Close engine hood
No Continuity
7 Starter switch
"ACC" Voltage Starter
switch "OFF" ov
position
position
Starter switch
"ACC" 12V Satisfactory if
or "ON" position 10V and over
8 Battery(+)
Voltage -12V Satisfactory if
10V and over
9 Door lock switch Continuity Unlock with locking Continuity Ground
( FRT-LH & RH) knob
RR-LH & RH Lock with locking No Continuity
Tailgate knob
10 Detect switch Continuity Unlock with key Continuity Ground
(
FRT-LH & RH )
Tailgate Lock
with key No Continuity
Fig. 8-319
..

8-282 CHASSIS ELECTRICAL
ENGINE HOOD SWITCH
~ INSPECTION
Check the continuity between the switch terminal and
the body. (Fig. 8-320)
~ Switch side
~· Sw
Push
Release
Fig.
8-320
E) REMOVAL (FIG. 8-321)
Switch 1 body
Preparation: Disconnect the battery ground cable.
Q...,..,...___ 1. Cap
~Locknut
Fig. 8-321
1. Cap
2. Engine hood switch
• Remove the lock nut
• Disconnect the connector
B INSTALLATION
To install, follow the removal steps in the reverse
order.
KEY SWITCH (FRONT DOOR-LH AND
RH, TAILGATE) ...
~ INSPECTION (DETECT SWITCH)
Check the continuity between the connector termi­
nals. (Fig. 8-322)
Switch side
~· K y p 1 3
Lock 0 {)
Unlock
Fig. 8-322
~ INSPECTION (TAMPER SWITCH)
Check the continuity between the connector
terminals. (Fig. 8-323)
• Switch side
~· Sw 2 4
Push
Release
Fig. 8-323
B REMOVAL AND INSTALLATION
r::J Refer to Section 10 "BODY" for outside handle
c:.:J and door lock cylinder removal and installation
steps

~ INSPECTION
I B-111
~
4 1
(82)
IACCI
LOCK Removed
OFF
ACC Inserted
ON -
START
Fig. 98-9
I t!l Check the continuity between the starter switch
connector
terminals. (fig. 98-9)
Replace the starter switch when the result of
inspection is found abnormal.
B REMOVAL (FIG. 98-10)
Preparation: Disconnect the battery ground cable.
5 3
IIG2) 1ST)
CRUISE CONTROL 98-29
2 7
(81) IIG1)
Fig. 98-10
8 6
IKEY(j;)) IKEY81
o----o
5. Starter switch
I
I
1. Front console I assembly

9J-8 Supplemental Restraint System
DEFINITIONS
AIR BAG -An inflatable cloth cushion designed to
deploy in certain frontal crashes. It supplements the
protection offered by the seat belts by distributing the
impact load more evenly over the vehicle occupant's
head and torso.
ASYNCHRONOUS -Performed in a non-periodic
fashion,i.e.no defined time or interval.
B+-Battery voltage, the voltage available at the battery
at the time of the indicated measurement. With the key
"ON" and the engine not running, the system voltage will
likely be between 12 and 12.5 volts. At idle the voltage
may be 14 to 16 volts. The voltage could be as low as 1
0
volts during engine cranking.
BULB
CHECK-The DERM will cause the "AIR BAG"
warning lamp to flash seven times and then go "OFF"
whenever the ignition switch transitions to the RUN
position from any other ignition switch position and no
malfunctions are detected.
"CONTINUOUS MONITORING"-Tests performed by
the DERM on the
SRS every 1 00 milliseconds while
"Ignition
1" voltage is in the normal operating voltage
range at the DERM.
DATA LINK CONNECTOR(DLC)-Formerly "ALDL'', a
connector which allows communication with an
off-board computer, such as a scan
tool.
DATUM LINE-A base line parallel to the plane of the
underbody or frame from which all vertical
measurements originate.
DEPLOY-To inflate the air bag.
DEPLOYMENT
LOOPS - The circuits which supply
current to the inflator modules to deploy the air bag.
DERM -Diagnostic
energy reserve module which
provides reserve energy to the deployment loops and
performs diagnostic monitoring of
all SRS components.
DIAGNOSTIC TROUBLE CODE(DTC) -Formerly
"Code,"a numerical designator used by the DERM to
indicate specific
SRS malfunctions.
DRIVER CURRENT SOURCE-An output of the DERM
which injects current into the driver inflator module circuit
during the "Initiator Assembly Resistance
Test."
DRIVER INFLATOR
MODULE-An assembly located in
the steering wheel hub consisting of an inflatable air bag,
an inflator and an initiator.
DUAL
POLE ARMING SENSOR-A sensor on the high
side(power side) of the deployment loops that is
calibrated to supply voltage to the inflator modules when
the vehicle velocity changes are severe enough to
warrant arming of the air bags in preparation for
deployment.
EEPROM -Electrically Erasable Programmable Read ~
Only Memory. Memory which retains its contents when
power
is removed from the DERM.
FORWARD LH DISCRIMINATING SENSOR-A sensor
on the low side(ground side) of the deployment loops
which is calibrated to ground the inflator modules when
the vehicle velocity changes are severe enough to
warrant deployment of the air bags.
FORWARD RH DISCRIMINATING SENSOR-A sensor
on the low side(ground side) of the deployment loops
which
is calibrated to ground the inflator modules when
the vehicle velocity changes are severe enough
to
warrant deployment of the air bag.
FORWARD LH SENSOR Eng-Room HARNESS-An
assembly of two correct carrying wires which connects
the Forward
LH discriminating sensor to SRS harness.
FORWARD RH SENSOR Eng-Room HARNESS
JUMPER-An assembly of two current carrying wires
which connects the Forward
RH discriminating sensor to
the
SRS harness.
HIGHER PRIORITY FAULT-Each diagnostic trouble
code
is assigned a priority based on the detectability with
other DTCs present. The priority corresponds to the
detectability of the malfunction ONLY, and does NOT
relate to the criticality of the malfunction with respect to ~
deployment or non-deployment under any given
condition.
IGNITION CYCLE -The voltage at the PERM "Ignition
1"
inputs, with ignition switch "ON," is within the normal
operating voltage range for at least ten seconds before
turning ignition switch
"OFF."
IGNITION1
-A battery voltage(B+)circuit which is only
powered with the ignition switch in the RUN,BULB
TEST,or START positions.
INITIATOR-The electrical component inside the inflator
module which, when sufficient current flows, sets off the
chemical reaction that inflates the air bag.
"INITIATOR ASSEMBLY RESISTANCE TEST"-Tests
performed once each ignition cycle when no
malfunctions are detected during "Turn-ON" or
"Continuous Monitoring." This test checks for the correct
DERM configuration for the vehicle, shorts to
"Ignition 1"
in the deployment loops, high resistance or opens in the
"Driver
Side High," "Driver Side Low," "Passenger Side
High"
and "Passenger Side Low" circuits and measures
the resistance of the inflator assembly consisting of: 1)
Initiators, 2) SRS coil assembly(driver side only), 3)
Connectors and associated wiring.
NORMAL OPERATING VOLTAGE RANGE-The ~
voltage measured between the DERM "Ignition 1" ·
terminals and "Ground" terminals is between 7.25 and 16
volts.
•

Supplemental Restraint System 9J-13
ON-VEHICLE SERVICE
SERVICE PRECAUTIONS
WARNING: WHEN PERFORMING SERVICE ON OR
AROUND SRS COMPONENTS OR SRS WIRING,
FOLLOW
THE PROCEDURES LISTED BELOW TO
TEMPORARILY DISABLE THE SRS. FAILURE TO
FOLLOW PROCEDURES COULD RESULT IN
POSSIBLE AIR
BAG DEPLOYMENT, PERSONAL
INJURY OR OTHERWISE
UNNEEDED SRS
REPAIRS.
The DERM in Driver-Passenger SRS can maintain
sufficient voltage to cause a deployment for up to 2
minutes after the ignition switch is turned
"OFF," the
battery is disconnected, or the fuse powering the DERM
is removed.
Many of the service procedures require removal of the
"AIR BAG" fuse, and disconnection of the inflator
modules from the deployment loop to avoid an accidental
deployment.
If the inflator module is disconnected from
the deployment loop as noted in the "Disabling the
SRS"
procedure that follows, service can begin immediately
without waiting for the 2-minute time period to expire.
DISABLING THE SRS
REMOVAL
Turn the ignition switch to "OFF"
1. Remove SRS fuse C-21, C-22, C-23 and C-24 from
left dash side lower fuse block.
2. Disconnect yellow 3-way connector at the base of
steering column.
3. Remove 1/P compartment door assembly, Refer to
"Passenger inflator module replacement" in section
9J-132.
4. Disconnect yellow 4-way connector behind the 1/P
compartment door assembly.
IMPORTANT
• With the "AIR BAG" fuse removed and ignition switch
"ON," if Fuse 21 left. the "AIR BAG" warning lamp will
be "ON." This is normal operation and does not
indicate an
SRS malfunction.
ENABLING THE SRS
INSTALLATION
Turn ignition switch to "LOCK" and remove key.
1. Connect yellow 4-way connector for passenger
inflator module.
2. 1/P compartment door assembly, Refer to
"Passenger inflator module replacemenf' in section
9J-3.
3. Connect yellow 2-way connector at the base of the
steering column.
4. Install "AIR BAG" fuse C-21, C-22, C-23 and C-24 to
left dash side lower fuse block.
Turn ignition switch to
"RUN" and verify that the "AIR
BAG"
warning lamp flashes seven times and then turns
"OFP' If it does not operate as described, perform the
"SRS Diagnostic System Check" in section 9J-2.
HANDLING/INSTALLATION/DIAGNOSIS
1. Inflator modules should not be subjected to
temperatures above
65°C{150°F).
2. Discriminating sensors, inflator modules, arming
sensors, or DERMs should not be used if they have
been dropped from a height
of 91.4 centimeters
{3feet).
3. When a discriminating sensor or arming sensor is
replaced, it must be oriented with the arrow on the
sensor pointing toward the front of the vehicle.
It is
very important for the discriminating sensors and
arming sensor to be located flat on the mounting
surface, parallel to the vehicle datum line.
It is
important that the sensor mounting surface is free of
any dirt or other foreign material.
4. Do not apply power to the SRS unless all
components are connected or a diagnostic chart
requests it, as this
will set a diagnostic trouble code.
5. The "SRS Diagnostic System Check" must be the
starting point of any
SRS diagnostics. The "SRS
Diagnostic System Check" will verify proper "AIR
BAG"
warning lamp operation and will lead you to the
correct chart to diagnose any
SRS malfunctions.
Bypassing these procedures may result
in extended
diagnostic time, incorrect diagnosis, and incorrect
parts replacements.

Supplemental Restraint System 9J-117
SERVICE PRECAUTIONS
CAUTION: WHEN PERFORMING SERVICE ON OR
AROUND SRS COMPONENTS OR SRS WIRING,
FOLLOW
THE PROCEDURES LISTED BELOW TO
TEMPORARILY
DISABLE THE SRS. FAILURE TO
FOLLOW PROCEDURES COULD RESULT IN
POSSIBLE AIR BAG DEPLOYMENT, PERSONAL
INJURY OR OTHERWISE UNNEEDED SRS
REPAIRS.
The DERM in Driver-Passenger SRS can maintain
sufficient voltage to cause a deployment for up to 2
minutes after the ignition switch is turned to
"OFF," the
battery is disconnected, or the fuse powering the DERM
is removed.
Many of the service procedures require removal of the
"AIR BAG" fuse, and disconnection of the inflator
modules from the deployment loop to avoid an accidental
deployment.
If the inflator module is disconnected from
the deployment loop as noted in the "Disabling the
SRS"
procedure that follows, service can begin immediately
without waiting for the 2 minute time period to expire.
DISABLING THE SRS
REMOVAL
• Turn the steering wheel so that the vehicle's wheels
are pointing straight ahead.
• Turn the ignition switch to "OFF"
1. Remove SRS fuse C-21, C-22, C-23 and C-24 from
left dash side lower fuse block.
2. Disconnect yellow
3-way connector at the base of
the steering column.
3. Remove
liP compartment door assembly, Refer to
"Passenger inflator module replacemenf' in section
9J-135.
4. Disconnect yellow 4-way connector behind the liP
compartment door assembly.
NOTE
• With the" AIR BAG" fuse removed and ignition switch
"ON," the "AiR BAG" warning lamp will be "ON." This
is normal operation and does not indicate
an SRS
malfunction.
ENABLING THE SRS
INSTALLATION
Turn ignition switch to "LOCK" and remove key.
1. Connect yellow 4-way connector of passenger
inflator module.
2. Install liP compartment door assembly, Refer to
"Passenger inflator module replacement" in section
9J-3.
3. Connect yellow 3-way connector at the base of the
steering column.
4. Install" AIR BAG" fuse C-21, C-22, C-23 and C-24 to
left dash side lower fuse block.
Tum ignition switch to
"RUN" and verify that the "AIR
BAG"
warning lamp flashes seven times and then turns
"OFF" If it does not operate as described, perform the
"SRS Diagnostic System Check" in section 9J-32.
HANDLING/INSTALLATION/DIAGNOSIS
1. Inflator modules should not be subjected to
temperatures above 65°C(150°F).
2. Discriminating s~nsors, inflator modules, arming
sensors, or DERMs should not be used if they have
been dropped from a height of 1
00 centimeters (3.28
feet) or more.
3. When a discriminating sensor or arming sensor is
replaced, it MUST be oriented with the arrow
on the
sensor pointing toward the front of the vehicle.
It is
very important for the discriminating sensors and
arming sensor to be located flat on the mounting
surface, parallel to the vehicle datum line.
It is
important that the sensor mounting surface is free of
any dirt or other foreign material.
4. Do not apply power to the SRS unless all
components are connected or a diagnostic chart
requests it, as this
will set a diagnostic trouble code.
5. The
"SRS Diagnostic System Check'' must be the
starting point of any SRS diagnostics. The
"SRS
Diagnostic System Check" will verify proper "AIR
BAG" warning lamp operation and will lead you to the
correct chart to diagnose any SRS malfunctions.
Bypassing these procedures may result in extended
diagnostic time, incorrect diagnosis, and incorrect
parts replacements.
INSPECTIONS REQUIRED AFTER ACCI­
DENT
CAUTION: CERTAIN SRS COMPONENTS MUST BE
REPLACED AFTER A FRONTAL
CRASH INVOLVING
AIR
BAG DEPLOYMENT.
In all types of accident regardless of "Air Bag"
deployment, visually inspect all the following
components and their points and replace as required:
- Passenger
Inflator Module
- Steering wheel
- SRS coil assembly
- Steering column
- Knee bolster and
Instrument panel mounting

BODY 16-47
FRONT OUTSIDE HANDLE AND DOOR LOCK CYLINDER
Fig. 10-66
1+•1 REMOVAL
Preparation: Disconnect the battery ground cable
1. Door trim panel
2. Waterproof sheet
• Refer to "WINDOW REGULATOR" removal
procedure in this section.
3. Outside handle
• Disconnect the locking links (Arrow marks
positions) and key
switch connector (W/Anti­
theft) (Fig. 10-67).
4. Key switch (W/Anti-theft) (fig. 10-68)
5. Door lock cylinder
• Remove the cylinder fixing clip. (Fig. 10-69)
K~~'~ connector
To Door lock assembly
Fig. 10-67
Installation steps
To install, follow the removal steps in the reverse order.
Outside handle

Fig. 10-68
Clip
Fig. 10-69

10-80 BODY
TAILGATE OUTSIDE HANDLE AND/OR TAILGATE LOCK CYLINDER
1
Fig. 10-160
I W/A~ti-theft
I
Removal steps
1. Tailgate trim panei(LH)
2. Waterproof sheet
3. Grommet
4.
Tailgate outside handle 5. Tailgate lock cylinder
Installation steps
To install, follow the removal
steps in the reverse order.
1••1 REMOVAL 5. Tailgate lock cylinder (fig. 10-162)
Preparation: Disconnect the battery ground cable
1. Tailgate trim panel
2. Waterproof sheet
• Refer to "TAILGATE LOCK ASSEMBLY (LH)"
in
this section.
3. Grommet
4. Tailgate outside handle (Fig. 10-161)
•
Disconnect locking links (Arrow marks
positions).
• Disconnect key switch connector. (W/Anti­
theft)
• Remove 3 fixing bolts.
To lock assembly
Fig. 10-161
• Remove key switch from lock cylinder
(W/Anti-theft)
• Remove lock cylinder fixing bolt.
Key cylinder
Key switch fixing bolt
Fig. 10-162
Key cylinder fixing bolt
..