1998 ISUZU TROOPER ESP

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.

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.

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

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.

9J1±59
RESTRAINT CONTROL SYSTEM
DTC 45 Driver Pretensioner Loop Short To Ground
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 monitors the voltage at ªDriver Belt Lowº
terminal ª22º and ªpassenger Belt Lowº terminal ª10º to
detect shorts to ground in the air bag assembly circuits.
DTC Will Set When:
Neither of the air bag and the pretensioner belt are open.
ªIgnition 1º is within the normal operating voltage range.
This test is run once each ignition cycle and ªContinuous
Monitoringº. Once these conditions are met and the
voltage at ªDriver Belt Lowº is below a specified value,
DTC 45 will set.
Action Taken:
SDM turns ªONº the ªAIR BAGº warning lamp and sets a
diagnostic trouble code.
DTC Will Clear When:
The malfunction is no longer occurring and the ignition 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 SDM is
malfunctioning
3. This test isolates the malfunction to one side of the
driver pretensioner assembly yellow 2±pin
connector at the base of the driver seat.
4. This test determines whether the malfunction is in
IB13±BLU/RED.
5. This test determines whether the malfunction is in
IB14±BLU/YEL.
Diagnostic Aids:
An intermittent condition is likely to be caused by a short
to ground in the driver pretensioner assembly circuit.
Inspect IB13±BLU/RED and IB14±BLU/YEL carefully for
cutting or chafing.

9J1±61
RESTRAINT CONTROL SYSTEM
DTC 46 Driver Pretensioner Loop Short To Voltage
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 monitors the voltage at ªDriver Belt Lowº
terminal ª22º and ªPassenger Belt Lowº terminal ª10º to
detect shorts to B+ in the pretensioner assembly circuits.
DTC Will Set When:
ªIgnition 1º is in the normal operating voltage range. This
test is run once each ignition cycle and ªContinuous
monitoringº. Once these conditions are met and the
voltage at ªDriver Belt Lowº is above a specified value,
DTC 46 will set.
Action Taken:
SDM turns ªONº the ªAIR BAGº warning lamp and sets
DTC 46.
DTC Will Clear When:
The malfunction is no longer occurring and the ignition 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 SDM is
malfunctioning.
3. This test isolates the malfunction to one side of the
driver pretensioner assembly yellow 2±pin
connector at the base of the driver seat.
4. This test determines whether the malfunction is in
IB13±BLU/RED.
5. This test determines whether the malfunction is in
IB14±BLU/YEL.
Diagnostic Aids:
An intermittent condition is likely to be caused by a short
to B+ in the driver pretensioner assembly circuit. Inspect
IB13±BLU/RED and IB14±BLU/YEL carefully for cutting
or chafing. If the wiring pigtail of the driver pretensioner
assembly is damaged, the components must be
replaced. A careful inspection of IB13±BLU/RED and
IB14±BLU/YEL, including the driver pretensioner
assembly is essential to ensure that the replacement
SDM will not be damaged.