1998 ISUZU TROOPER ESP

8DÐ408 WIRING SYSTEM
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.
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 twice as many the
number of registered ID code with interval of two seconds. (In case
of no registered code, the response is made ten times.)
Is the response complete? 1
2
3
4
5Go to Step 2
Go to Step 3
Go to Step 4
Go to Step 5
FinishedÑ
Finished
Finished
Finished
Ñ
ID Code Check
This procedure checks how many kinds of ID code are
registered.
Step Action Yes No
Open the driverÕs side door.
Is the action complete?
Lock the door and then unlock it three times within ten 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
2
3Go to Step 2
Go to Step 3
Go to Step 4Ñ
Finished
Finished AntiÐtheft horn, as an answer back function for the
transmitter operation, changes from available into
unavailing or from unavailing into available by this
procedure.
Answer Back (AntiÐtheft Horn Operation) Change Mode

WIRING SYSTEM 8DÐ409
Step Action Yes No
1. Lock the door and unlock it 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?
Answer back mode changes.
Is this step complete?
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? 4
5
6
7Go to Step 5
Go to Step 6
Finished
FinishedFinished
Go to Step 7
Ñ
Ñ
AntiÐtheft & Keyless Entry Control
Unit/Transmitter Replacement
AntiÐtheft & Keyless Entry Control Unit
Replacement
1. Remove and install the control unit.
cRefer to AntiÐtheft & Keyless Entry Control Unit
Removal and Installation in this section.
2. Register ID code.
cRefer to ID Code Registration in this section.
3. Check that the keyless entry system works normally.
Transmitter Replacement
1. Prepare a new transmitter.
2. Register ID code.
cRefer to ID Code Registration in this section.
3. Check that the keyless entry system works normally.
Transmitter Battery Replacement
1. Remove a screw to remove the cover.
2. Remove the batteries.
3. Set the new batteries into the transmitter.
4. Install the cover to the transmitter.
5. Check that the keyless entry system works normally.

8H±24SECURITY AND LOCKS
Keyless Entry 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
ActionYe sNo
11. Open the driver's side door.
2. Turn the starter switch off.
Is the action complete?
Go to Step 2Ð
2Turn the starter switch to ACC position and then off three times
within five seconds after step 1.
Is the action complete within five seconds?
Go to Step 3Finished
3Close the door and then open it two times within ten seconds after
step 2.
Is the action complete within ten seconds?
Go to Step 4Finished
41. 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?
Go to Step 5Finished
5The control unit makes lock/unlock response once with interval of
one second.
Is the response complete?
Go to Step 6Ð
6Operate the lock or unlock button of transmitter within twenty
senconds afer step 5.
Is the action complete?
Go to Step 7Finished
7The control unit makes lock/unlock response once with in terval of
one second as ID temprary registration.
Is the response complete?
Go to Step 8Ð
8Operate the lock or unlock button of transmitter within twenty
seconds after step 7.
Is the action complete?
Go to Step 9Finished
9The control unit compares temporary registered ID code with
receiving ID code
Is temporary registered ID code the same as receiving ID code?
Go to Step 10Go to Step 11
10The control unit makes lock/unlock response three times with
interval of one second.
Is the response complete?
FinishedÐ
11The control unit erases all registered ID codes and registers new
ID code.
Is the registration complete?
Go to Step 12Go to Step 13

SECURITY AND LOCKS8H±25
StepNo Ye s Action
12The control unit makes lock/unlock response once with interval of
one second.
Is the response complete?
FinishedÐ
13The control unit makes lock/unlock response three times with
interval of one second.
Is the response complete?
FinishedÐ
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.
Step
ActionYe sNo
11. Open the driver's side door.
2. Turn the starter switch off.
Is the action complete?
Go to Step 2Ð
2Turn the starter switch to ACC position and then off three times
within five seconds after step 1.
Is the action complete within five seconds?
Go to Step 3Finished
3Close the door and then open it two times within ten seconds after
step 2.
Is the action complete within ten seconds?
Go to Step 4Finished
41. 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?
Go to Step 5Finished
5The control unit makes lock/unlock response two times with
interval of one second.
Is the response complete?
Go to Step 6Ð
6Operate the lock or unlock button of transmitter within twenty
seconds afer step 5.
Is the action complete?
Go to Step 7Finished
7The control unit makes lock/unlock response two times with
interval of one second as ID temprary registration.
Is the response complete?
Go to Step 8Ð
8Operate the lock or unlock transmitter within twenty seconds after
step 7.
Is the action complete?
Go to Step 9Finished
9The control unit compares temporary registered ID code with
receiving ID code
Is temporary registered ID code the same as receiving ID code?
Go to Step 10Go to Step 11
10The control unit makes lock/unlock response with interval of one
second.
Is the response complete?
FinishedÐ
11The control unit registers new ID code.
Is the registration complete?
Go to Step 12Go to Step 13

8H±26SECURITY AND LOCKS
StepNo Ye s Action
12The control unit makes lock/unlock response once with interval of
one second.
Is the response complete?
FinishedÐ
13The control unit makes lock/unlock response three times with
interval of one second.
Is the response complete?
FinishedÐ
ID Code Check
This procedure checks how many kinds of ID code are
registered.
Step
ActionYe sNo
11. Open the driver's side door.
2. Turn the starter switch off.
Is the action complete?
Go to Step 2Ð
2Turn the starter switch to ACC position and then off three times
within five seconds after step 1.
Is the action complete within five seconds?
Go to Step 3Finished
3Close the door and then open it two times within ten seconds after
step 2.
Is the action complete within ten seconds?
Go to Step 4Finished
41. Turn the starter switch to ACC position and then off.
2. Close the door and then open it.
NOTE: This step must be performed within ten seconds after step
3.
Is the action complete?
Go to Step 5Finished
5The control unit makes lock/unlock response twice as many the
number of registered ID code with interval of two seconds. (In
case of no registered code, the response is made ten times.)
Is the response complete?
FinishedÐ
Answer Back (Anti±theft Horn
Operation) Change Mode
Anti±theft horn, as an answer back function for the
transmitter operation, chages from available into
unavailing or from unavailing into available by this
procedure.
Step
ActionYe sNo
1Open the driver's side door.
Is the action complete?
Go to Step 2Ð
2Lock the door and then unlock it three times within ten seconds
after step 1.
Is the action complete within five seconds?
Go to Step 3Finished
3Close the door and then open it two times within ten seconds after
step 2.
Is the action complete within ten seconds?
Go to Step 4Finished

SECURITY AND LOCKS8H±27
StepNo Ye s Action
41. Lock the door and unlock it 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?
Go to Step 5Finished
5Answer back mode changes.
Is this step complete?
Go to Step 6Go to Step 7
6The control unit makes lock/unlock response once with interval of
one second.
Is the response complete?
FinishedÐ
7The control unit makes lock/unlock response three times with
interval of one second.
Is the response complete?
FinishedÐ
Anti±theft & Keyless Entry Control
Unit/Transmitter Replacement
Anti±theft & Keyless Entry Control Unit
Replacement
1. Remove and install the control unit.

Refer to Anti±theft & Keyless Entry Control Unit
Removal and Installation in this section.
2. Register ID code.

Refer to ID Code Registration in this section.
3. Check that the keyless entry system works normally.
Transmitter Replacement
1. Prepare a new transmitter.
2. Regiter ID code.

Refer to ID Code Registration in this section.
3. Check that the keyless entry system works normally.
Transmitter Battery Replacement
1. Remove a screw to remove the cover.
2. Remove the batteries.
3. Set the new batteries into the transmitter.
4. Install the cover to the transmitter.
5. Check that the keyless entry system works normally.

RESTRAINT CONTROL SYSTEM 9J1±4
System Schematic
D09RW014
SRS Diagnostic System Check
The diagnostic procedures used in this section are
designed to find and repair SRS malfunctions. To get the
best results, it is important to use the diagnostic charts
and follow the sequence listed below:
A. Perform the ªSRS Diagnostic System Check.º
The ªSRS Diagnostic System Checkº must be the
starting point of any SRS diagnostics. The ªSRS
Diagnostic System Checkº checks for proper ªAIR
BAGº warning lamp operation, the ability of the SDM
to communicate through the ªSerial Dataº line and
whether SRS diagnostic trouble codes exist.
B. Refer to the proper diagnostic chart as directed by the
ªSRS Diagnostic System Check.º
The ªSRS Diagnostic System Checkº 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 replacement.
C. Repeat the ªSRS Diagnostic System Checkº after any
repair or diagnostic procedures have been
preformed.
Performing the ªSRS Diagnostic System Checkº after
all repair or diagnostic procedures will ensure that the
repair has been made correctly and that no other
malfunctions exist
Circuit Description
When the ignition switch is first turned ªONº, ªIgnition 1º
voltage is applied from the ªC±21º fuse to the SDM at the
ªIgnition 1º input terminals ª12º. The SDM responds by
flashing the ªAIR BAGº warning lamp turn on 3.5 seconds,
while performing tests on the SRS.
Notes On System Check Chart:
1. The ªAIR BAGº warning lamp should turn on 3.5
seconds after ignition is first turned ªONº.
2. After the ªAIR BAGº warning lamp turn on 3.5
seconds, it should turn ªOFFº
3. This test checks for the proper operation of the
ªSerial Dataº line. This test will also determine
whether history diagnostic trouble codes are stored
and, if so, identify them.
4. Improper operation of the ªAIR BAGº warning lamp
is indicated. This test differentiates a warning lamp
stays ªONº condition from a warning lamp does not
come ªONº condition.
5. This test checks for proper operation of the ªSerial
Dataº line. This test will also identify the stored
diagnostic trouble codes and whether they are
current or history.
Diagnostic Aids:
The order in which diagnostic trouble codes are
diagnosed is very important. Failure to diagnose the

RESTRAINT CONTROL SYSTEM 9J1±8
Chart B ªAIR BAGº Warning Lamp Comes ªONº Steady
D09RW014
Circuit Description:
When the ignition switch is first turned ªONº, ªIgnition 1º
voltage is applied from the ªC±10º fuse to ªAIR BAGº,
warning lamp which is connected to ªSRS Warning
Lampº, terminal ª7º. The ªC±21º fuses apply system
voltage to the ªIgnition 1º inputs, terminals ª12º. The SDM
responds by turning on the ªAIR BAGº warning lamp 3.5
seconds. If ªIgnition 1º is less than 9 volts, the ªAIR BAGº
warning lamp will come ªONº solid with no DTCs set.
Chart Test Description:
Number(s) below refer to step number(s) on the
diagnostic chart.
2. This test checks for an open in the ªIgnition 1º circuit
to the SDM.
3. This test checks for the voltage of ªIGNITION 1º.
4. This test determines whether the malfunction is a
short to ground in IB04±WHT/RED.