1998 ISUZU TROOPER Service Repair Manual

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Page 3537 of 3573

ISUZU TROOPER 1998 Service Repair Manual RESTRAINT CONTROL SYSTEM 9J1±50
DTC 33 Passenger Pretensioner Loop Short To Voltage
StepActionYe sNo
1Perform the ªSRS Diagnostic System Checkº
Was the ªSRS Diagnostic System Checkº performed?
G

Page 3538 of 3573

ISUZU TROOPER 1998 Service Repair Manual 9J1±51
RESTRAINT CONTROL SYSTEM
DTC 34 Passenger Pretensioner Loop Open
D09RW014
Circuit Description:
When the ignition switch is turned ªONº, the SDM will
perform tests to diagnose critical malfu

9J1±51
RESTRAINT CONTROL SYSTEM
DTC 34 Passenger Pretensioner Loop Open
D09RW014
Circuit Description:
When the ignition switch is turned ªONº, the SDM will
perform tests to diagnose critical malfunctions within
itself. Upon passing these tests, ªIgnition 1º, and
pretensioner loop voltages are measured to ensure they
are within their respective normal voltage ranges. During
ªContinuous Monitoringº diagnostics, a fixed amount of
current is flowing in the deployment loop. This produces
proportional voltage drops in the loop. By monitoring the
voltage difference between ªPassenger Belt Highº and
ªPassenger Belt Lowº, the SDM calculates the combined
resistance of the passenger pretensioner assembly,
harness wiring IB15±BLU/BLK AND IB16±BLU/ORG,
and connector terminal contact.
DTC Will Set When:
The voltage difference between ªPassenger pretensioner
Highº terminal ª9º and ªPassenger pretensioner Lowº
terminal ª10º is above or equal to a specified value for 500
milliseconds during ªContinuous Monitoringº.
Action Taken:
SDM turns ªONº the ªAIR BAGº warning lamp and sets a
diagnostic trouble code.
DTC Will Clear When:
The voltage difference between ªPassenger Belt Highº
terminal ª9º and ªPassenger Belt Lowº terminal ª10º isbelow a specified value for 500 milliseconds during
ªContinuous Monitoringº.
DTC Chart Test Description:
Number(s) below refer to step number(s) on the
diagnostic chart:
2. This test determines whether the malfunction is in
the SDM.
3. This test verifies proper connection of the yellow
2±pin connector.
4. This test cheeks for proper contact and/or corrosion
of the shorting clip in the yellow 2±pin connector
terminals.
5. The test checks for a malfunctioning passenger
pretensioner assembly.
6. This test determines whether the open in the wiring.
Diagnostic Aids:
An intermittent condition is likely to be caused by a poor
connection at the passenger pretensioner assembly
harness connector terminalsª1º and ª2º, SDM terminals
ª9º and ª10º, or an open in IB15±BLU/BLK and
IB16±BLU/ORG.

Page 3539 of 3573

ISUZU TROOPER 1998 Service Repair Manual RESTRAINT CONTROL SYSTEM 9J1±52
DTC 34 Passenger Pretensioner Loop Open
StepActionYe sNo
1Was the ªSRS Diagnostic System Checkº performed?
Go to Step 2
Go to the ªSRS
Diagnostic
System Checkº
21

RESTRAINT CONTROL SYSTEM 9J1±52
DTC 34 Passenger Pretensioner Loop Open
StepActionYe sNo
1Was the ªSRS Diagnostic System Checkº performed?
Go to Step 2
Go to the ªSRS
Diagnostic
System Checkº
21. When measurements are requested in this chart use
5±8840±0285±0 DVM with correct terminal adapter from
5±8840±0385±0.
2. Using scan tool data list function, read and record the
passenger pretensioner differential voltage.
Is passenger pretensioner VDIF 0.425 volts or more?
Go to Step 3Go to Chart A
31. Ignition switch ªOFFº.
2. Make sure the passenger pretensioner assembly yellow 2±pin
connector located at the base of the passenger seat.
Is the yellow 2±pin connector connected properly?
Go to Step 4
Seat passenger
pretensioner
assembly yellow
2±pin connector
properly
Go to Step 7
41. Disconnect and inspect the passenger pretensioner assembly
yellow 2±pin connector located at the base of the passenger
seat.
2. If ok, reconnect the passenger pretensioner assembly 2±pin
connector.
3. Ignition switch ªONº.
Is DTC 34 current?
Go to Step 5Go to Step 7
51. Ignition switch ªOff.º
2. Disconnect the passenger pretensioner assembly, yellow
2±pin connector located at the base of the passenger seat.
3. Connect 5±8840±2421±0 SRS driver / passenger load tool
and appropriate adapters to passenger pretensioner
assembly harness connectors.
4. Ignition switch ªON.º
Is DTC 34 current?
Go to Step 6
Ignition switch
ªOffº
Replace the
passenger
pretensioner
assembly
Go to Step 7
61. Ignition switch ªOff.º
2. There has been an open circuit resistance in the passenger
pretensioner loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking IB15±BLU/BLK and IB16±BLU/ORG, and SDM
connector terminal ª9º and ª10º to locate the root cause.
Was a fault found?
Replace SRS
harness or repair
chassis harness
Go to Step 7
Go to Chart A
71. Reconnect all components ensure all component are properly
mounted.
2. Clear diagnostic trouble codes.
Was this step finished?
Go to the ªSRS
Diagnostic
System Checkº
Go to Step 7

Page 3540 of 3573

ISUZU TROOPER 1998 Service Repair Manual 9J1±53
RESTRAINT CONTROL SYSTEM
DTC 41 Driver Pretensioner Loop Resistance High
D09RW014
Circuit Description:
When the ignition switch is turned ªONº, the SDM will
perform tests to diagnose critic

9J1±53
RESTRAINT CONTROL SYSTEM
DTC 41 Driver Pretensioner Loop Resistance High
D09RW014
Circuit Description:
When the ignition switch is turned ªONº, the SDM will
perform tests to diagnose critical malfunctions within
itself. Upon passing these tests, ªIgnition 1º, and
pretensioner loop voltages are measured to ensure they
are within their respective normal voltage ranges.
The SDM then proceeds with the ªResistance
Measurement Testº ªDriver Belt Lowº terminal ª22º is
grounded through a current sink and the driver current
source connected to ªDriver Belt Highº terminal ª21º
allows a known amount of current to flow. By monitoring
the voltage difference between ªDriver Belt Highº and
ªDriver Belt Lowº, the SDM calculates the combined
resistance of the driver pretensioner assembly, harness
wiring IB13±BLU/RED and IB14±BLU/YEL, and
connector terminal contact.
DTC Will Set When:
The combined resistance of the driver pretensioner
assembly, harness wiring IB13±BLU/RED and
IB14±BLU/YEL, and connector terminal contact is above
a specified value. This test run once each ignition cycle
during the ªResistance Measurement Testº when:
1. No ªhigher priority faultsº are detected during
ªTurn±ONº
2. ªIgnition 1º voltage is in the specified value.
Action Taken:
SDM turns ªONº the ªAIR BAGº warning lamp and sets
DTC 41.
DTC Will Clear When:
The ignition switch is turned ªOFFº.
DTC Chart Test Description:
Number(s) below refer to step number(s) on the
diagnostic chart:
2. This test determines whether the malfunction is in
the SDM.
3. This test verifies proper connection of the yellow
2±pin connector at the base of the driver seat.
4. This test checks for proper contact and/or corrosion
of the 2±pin connector terminals at the base of the
driver seat.
5. This test isolate the malfunction to one side of the
pretensioner assembly yellow 2±pin connector
located at the base of the driver seat.
6. This test determines whether the malfunction is due
to high resistance in the wiring.

Page 3541 of 3573

ISUZU TROOPER 1998 Service Repair Manual RESTRAINT CONTROL SYSTEM 9J1±54
Diagnostic Aids:
An intermittent condition is likely to be caused by a poor
connection at terminals ª3º and ª4º of the driver
pretensioner assembly 2±pin connecto

RESTRAINT CONTROL SYSTEM 9J1±54
Diagnostic Aids:
An intermittent condition is likely to be caused by a poor
connection at terminals ª3º and ª4º of the driver
pretensioner assembly 2±pin connector at the base of the
driver seat. SDM terminals ª21º and ª22º or a poor wire to
terminal connection in IB13±BLU/RED orIB14±BLU/YEL. The test for this diagnostic trouble code
is only run while the ªAIR BAGº warning lamp is
performing the bulb check. When a scan tool ªClear
Codesº command is issued and the malfunction is still
present, the DTC will not reappear until the next ignition
cycle.
DTC 41 Driver Pretensioner Loop Resistance High
StepActionYe sNo
1Perform the ªSRS Diagnostic System Checkº.
Was the ªSRS Diagnostic System Checkº performed?
Go to Step 2
Repeat the ªSRS
Diagnostic
System Checkº
21. When measurements are requested in this chart use
5±8840±0285±0 DVM with correct terminal adapter from
5±8840±0385±0.
2. Use scan tool data list function, read and record the driver
pretensioner loop resistance.
Is driver resistance more than 3.7 ohms?
Go to Step 3Go to Chart A
31. Ignition switch ªOFF.º
2. Disconnect driver pretensioner assembly yellow 2±pin
connector located at base of the driver seat.
Is the 2±pin connector connected properly?
Go to Step 4
Driver
pretensioner
assembly 2±pin
connector
properly
Go to Step 7
41. Disconnect and inspect the driver pretensioner assembly
yellow 2±Pin connector located base of the driver seat.
2. If ok, reconnect the driver pretensioner assembly yellow 2±pin
connector.
3. Ignition switch ªON.º
Is DTC 41 current?
Go to Step 5Go to Step 7
51. Ignition switch ªOFF.º
2. Disconnect driver pretensioner assembly, yellow 2±pin
connector located at the base of the driver seat.
3. Connect SRS driver / passenger load tool 5±8840±2421±0
and appropriate adapter to driver pretensioner assembly
harness connectors.
4. Ignition switch ªON.º
Is DTC 41 current?
Go to Step 6Go to Step 7
61. Ignition switch ªOff.º
2. There has been a increase in the total circuit resistance of the
driver pretensioner loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking IB13±BLU/RED and IB14±BLU/YEL, and SDM
connector terminal ª21º and ª22º to locate the root cause.
Was a fault found?
Replace SRS
harness or repair
chassis harness
Go to Step 7
Go to Chart A
71. Reconnect all components ensure all component are properly
mounted.
2. Clear diagnostic trouble codes.
Was this step finished?
Repeat the ªSRS
Diagnostic
System Checkº
Go to Step 7

Page 3542 of 3573

ISUZU TROOPER 1998 Service Repair Manual 9J1±55
RESTRAINT CONTROL SYSTEM
DTC 42 Driver Pretensioner Loop Resistance Low
D09RW014
Circuit Description:
When the ignition switch is turned ªONº, the SDM will
perform tests to diagnose critica

9J1±55
RESTRAINT CONTROL SYSTEM
DTC 42 Driver Pretensioner Loop Resistance Low
D09RW014
Circuit Description:
When the ignition switch is turned ªONº, the SDM will
perform tests to diagnose critical malfunctions within
itself. Upon passing these tests ªIgnition 1º, and
pretensioner loop voltages are measured to ensure they
are within their respective normal voltage ranges.
The SDM then proceeds with the ªResistance
Measurement Testº ªDriver Belt Lowº terminal ª22º is
grounded through a current sink and the driver current
source connected to ªDriver Belt Highº terminal ª21º
allows a known amount of current to flow. By monitoring
the voltage difference between ªDriver Belt Highº and
ªDriver Belt Lowº the SDM calculates the combined
resistance of the driver pretensioner assembly, harness
wiring IB13±BLU/RED and IB14±BLU/YEL and
connector terminal contact.
DTC Will Set When:
The combined resistance of the driver pretensioner
assembly, harness wiring IB13±BLU/RED and
IB14±BLU/YEL and connector terminal contact is above
a specified value. This test is run once each ignition cycle
during the ªResistance Measurement Testº when:
1. No ªhigher priority faultsº are detected during
ªTurn±ONº
2. ªIgnition 1º voltage is in the specified value.
Action Taken:
SDM turns ªONº the ªAIR BAGº warning lamp and sets
DTC 42.
DTC Will Clear When:
The ignition switch is turned ªOFF.º
DTC Chart Test Description:
Number(s) below refer to circled number(s) on the
diagnostic chart:
2. This test determines whether the malfunction is in
the SDM.
3. This test verifies proper connection of the yellow
2±pin connector at the base of the driver seat.
4. This test checks for proper operation of the shorting
clip in the yellow 2±pin connector.
5. This test isolate the malfunction to one side of the
pretensioner assembly yellow 2±pin connector
located at the base of driver seat.
6. This test determines whether the malfunction is due
to shortening in the wiring.
Diagnostic Aids:
An intermittent condition is likely to be caused by a short
between IB13±BLU/RED or IB14±BLU/YEL or a
malfunctioning shorting clip on the driver pretensioner
assembly which would require replacement of the
component. The test for this diagnostic trouble code is

Page 3543 of 3573

ISUZU TROOPER 1998 Service Repair Manual RESTRAINT CONTROL SYSTEM 9J1±56
only run while the ªAIR BAGº warning lamp is performing
the bulb check. When a scan tool ªClear Codesºcommand is issued and the malfunction is still present,
the

RESTRAINT CONTROL SYSTEM 9J1±56
only run while the ªAIR BAGº warning lamp is performing
the bulb check. When a scan tool ªClear Codesºcommand is issued and the malfunction is still present,
the DTC will not reappear until the next ignition cycle.
DTC 42 Driver Pretensioner Loop Resistance Low
StepActionYe sNo
1Perform the ªSRS Diagnostic System Check.º
WAS THE ªSRS Diagnostic System Checkº performed?
Go to Step 2
Go to the ªSRS
Diagnostic
System Checkº
21. When measurements are requested in this chart use
5±8840±0285±0 DVM with correct terminal adapter from
5±8840±0385±0.
2. Use scan tool data list function, read and record the driver
pretensioner loop resistance.
Is driver pretensioner loop resistance less than 1.4 OHMS?
Go to Step 3Go to Chart A
31. Ignition switch ªOFF.º
2. Make sure the driver pretensioner assembly yellow 2±pin
connector located at the base of the driver seat is connected
properly.
Is the 2±pin connector connected properly?
Go to Step 4
Seat driver
pretensioner
assembly 2±pin
connector
properly
Go to Step 7
41. Disconnect and inspect the driver pretensioner assembly
yellow 2±pin connector located base of the driver seat.
2. If ok, reconnect the driver pretensioner assembly yellow 2±pin
connector.
3. Ignition switch ªON.º
Is DTC 42 current?
Go to Step 5Go to Step 7
51. Ignition switch ªOFF.º
2. Disconnect driver pretensioner assembly, yellow 2±pin
connector located at the base of driver seat.
3. Connect SRS driver / passenger load tool 5±8840±2421±0
and appropriate adapter to driver pretensioner assembly
harness connectors.
4. Ignition switch ªON.º
Is DTC 42 current?
Go to Step 6Go to Step 7
61. Ignition switch ªOFF.º
2. There has been a decrease in the total circuit resistance of the
driver pretensioner loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking IB13±BLU/RED and IB14±BLU/YEL, and SDM
connector terminal ª21º and ª22º to locate the root cause.
Was a fault found?
Replace SRS
harness or repair
chassis harness
Go to Step 7
Go to Chart A
71. Reconnect all components, ensure all component are properly
mounted.
2. Clear diagnostic trouble codes.
Was this step finished?
Go to the ªSRS
Diagnostic
System Checkº
Go to Step 7

Page 3544 of 3573

ISUZU TROOPER 1998 Service Repair Manual 9J1±57
RESTRAINT CONTROL SYSTEM
DTC 44 Driver Pretensioner Loop Open
D09RW014
Circuit Description:
When the ignition switch is turned ªONº, the SDM will
perform tests to diagnose critical malfunct

9J1±57
RESTRAINT CONTROL SYSTEM
DTC 44 Driver Pretensioner Loop Open
D09RW014
Circuit Description:
When the ignition switch is turned ªONº, the SDM will
perform tests to diagnose critical malfunctions within
itself. Upon passing these tests, ªIgnition 1º, and
pretensioner loop voltages are measured to ensure they
are within their respective normal voltage ranges.
During ªContinuous Monitoringº diagnostics, a fixed
amount of current is following in the pretensioner loop.
This produces proportional voltage drops in the loop. By
monitoring the voltage difference between ªDriver Belt
Highº and ªDriver Belt Lowº, the SDM calculates the
combined resistance of the driver pretensioner assembly,
harness wiring IB13±BLU/RED and IB14±BLU/YEL, and
connector terminal contact.
DTC Will Set When:
The voltage difference between ªDriver Belt Highº
terminal ª21º and ªDriver Belt Lowº terminal ª22º is above
or equal to a specified value for 500 milliseconds during
ªContinuous Monitoringº.
Action Taken:
SDM turns ªONº the ªAIR BAGº warning lamp and sets a
diagnostic trouble code.
DTC Will Clear When:
The voltage difference between ªDriver Belt Highº
terminal ª21º and ªDriver Belt Lowº terminal ª22º is belowa specified value for 500 milliseconds during ªContinuous
Monitoringº.
DTC Chart Test Description:
Number(s) below refer to step number(s) on the
diagnostic chart:
2. This test determines whether the malfunction is in
the SDM.
3. This test verifies proper connection of the yellow
2±pin connector at the base of the driver seat.
4. This test checks for proper contact and/or corrosion
of the yellow 2±pin connector at the base of the
driver seat.
5. This test isolates the malfunction to one side of the
driver pretensioner assembly yellow 2±pin
connector located at the base of driver seat.
6. This test determines whether the open is in the
wiring.
Diagnostic Aids:
An intermittent condition is likely to be caused by a poor
connection at the driver pretensioner assembly harness
2±pin connector terminals ª3º and ª4º at the top of the
steering column, SDM terminals ª21º and ª22º, or an open
in IB13±BLU/RED and IB14±BLU/YEL.

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