1998 ISUZU TROOPER check oil

RESTRAINT CONTROL SYSTEM 9J1±14
warning lamp is performing the bulb check, unless DTC
17 or DTC 26 is detected. When a scan tool ªClear
Codesº command is issued and the malfunction is stillpresent, the DTC will not reappear until the next ignition
cycle.
DTC 15 Passenger Deployment loop Resistance High
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. Use scan tool data list function, read and record the passenger
deployment loop resistance.
Is passenger resist. more than 2.9 ohms?
Go to Step 3Go to Chart A
31. Ignition switch ªOff.º
2. Make sure the passenger air bag assembly yellow 2±pin
connector located behind the glove box assembly is seated
properly.
Is the yellow 2±pin connector connected properly?
Go to Step 4
Seat passenger
Air Bag assembly
yellow 2±pin
connector
properly
Go to Step 7
41. Disconnect and inspect the passenger air bag assembly
yellow 2±pin connector located behind the glove box
assembly.
2. If ok, reconnect the passenger air bag assembly 2±pin
connector.
3. Ignition switch ªON.º
Is DTC 15 current?
Go to Step 5Go to Step 7
51. Ignition switch ªOff.º
2. Disconnect SRS coil and passenger air bag assembly, yellow
2±pin connector located at the base of the steering column and
behind the glove box assembly.
3. Connect 5±8840±2421±0 SRS driver / passenger load tool
and appropriate adapters to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch ªON.º
Is DTC 15 Current?
Go to Step 6
Ignition switch
ªOffº
Replace the
passenger air
bag assembly
Go to Step 7
61. Ignition switch ªOff.º
2. There has been an increase in the total circuit resistance of the
passenger inflator deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking IB07±YEL/GRN and IB08±YEL/RED, and SDM
connector terminal ª15º and ª16º to locate the root cause.
Was a fault found?
Replace SRS
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

RESTRAINT CONTROL SYSTEM 9J1±16
check, unless DTC 17 or DTC 26 is detected. When a
scan tool ªClear Codesº command is issued and themalfunction is still present, the DTC will not reappear until
the next ignition cycle.
DTC 16 Passenger Deployment loop Resistance Low
StepActionYe sNo
1Was 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. Using scan tool data list function, read and record the
passenger deployment loop resistance.
Is passenger resist. less than 1.4 ohms?
Go to Step 3Go to Chart A
31. Ignition switch ªOff.º
2. Make sure the passenger air bag assembly yellow 2±pin
connector located behind the glove box assembly is seated
properly.
Is the yellow 2±pin connector connected properly?
Go to Step 4
Seat passenger
air bag assembly
yellow 2±pin
connector
properly
Go to Step 7
41. Disconnect and inspect the passenger air bag assembly
yellow 2±pin connector located behind the glove box
assembly.
2. If ok, reconnect the passenger air bag assembly 2±pin
connector.
3. Ignition switch ªON.º
Is DTC 16 Current?
Go to Step 5Go to Step 7
51. Ignition switch ªOff.º
2. Disconnect SRS coil and passenger air bag assembly, yellow
2±pin connector located at the base of the steering column and
behind the glove box assembly.
3. Connect 5±8840±2421±0 SRS driver/passenger load tool and
appropriate adapters to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch ªON.º
Is DTC 16 current?
Go to Step 6
Ignition switch
ªOffº
Replace the
passenger air
bag assembly
Go to Step 7
61. Ignition switch ªOff.º
2. There has been a decrease in the total circuit resistance of the
passenger inflator deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking IB07±YEL/GRN and IB08±YEL/RED, and SDM
connector terminal ª15º and ª16º to locate the root cause.
Was a fault found?
Replace SRS
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

RESTRAINT CONTROL SYSTEM 9J1±18
DTC 17 Passenger Deployment 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 differential voltage.
Is passenger VDIF 0.425 volts or more?
Go to Step 3Go to Chart A
31. Ignition switch ªOFFº.
2. Make sure the passenger air bag assembly yellow 2±pin
connector located behind the glove box assembly is seated
properly.
Is the yellow 2±pin connector connected properly?
Go to Step 4
Seat passenger
air bag assembly
yellow 2±pin
connector
properly
Go to Step 7
41. Disconnect and inspect the passenger air bag assembly
yellow 2±pin connector located behind the glove box
assembly.
2. If ok, reconnect the passenger air bag assembly 2±pin
connector.
3. Ignition switch ªONº.
Is DTC 17 current?
Go to Step 5Go to Step 7
51. Ignition switch ªOff.º
2. Disconnect SRS coil and passenger air bag assembly, yellow
2±pin connector located at the base of the steering column and
behind the glove box assembly.
3. Connect 5±8840±2421±0 SRS driver / passenger load tool
and appropriate adapters to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch ªON.º
Is DTC 17 current?
Go to Step 6
Ignition switch
ªOffº
Replace the
passenger air
bag assembly
Go to Step 7
61. Ignition switch ªOff.º
2. There has been an open circuit resistance in the passenger
deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking IB07±YEL/GRN and IB08±YEL/RED, and SDM
connector terminal ª15º and ª16º to locate the root cause.
Was a fault found?
Replace SRS
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

9J1±23
RESTRAINT CONTROL SYSTEM
DTC 21 Driver Deployment 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
deployment loop voltages are measured to ensure they
are within their respective normal voltage ranges.
The SDM then proceeds with the ªResistance
Measurement Testº ªDriver Bag Lowº terminal ª4º is
grounded through a current sink and the driver current
source connected to ªDriver Bag Highº terminal ª3º allows
a known amount of current to flow. By monitoring the
voltage difference between ªDriver Bag Highº and ªDriver
Bag Lowº, the SDM calculates the combined resistance
of the driver air bag assembly, SRS coil assembly,
harness wiring IB05±YEL and IB06±YEL/BLK, and
connector terminal contact.
DTC Will Set When:
The combined resistance of the driver air bag assembly,
SRS Coil assembly, harness wiring IB05±YEL and
IB06±YEL/BLK, 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 21.
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 steering column.
4. This test checks for proper contact and/or corrosion
of the 2±pin connector terminals at the base of
steering column.
5. This test isolate the malfunction to one side of the
SRS coil assembly yellow 2±pin connector located
at the base of the steering column.
6. This test determines whether the malfunction is due
to high resistance in the wiring.
7. This test determines whether the malfunction is in
the SRS coil assembly or the driver air bag
assembly.

RESTRAINT CONTROL SYSTEM 9J1±24
Diagnostic Aids:
An intermittent condition is likely to be caused by a poor
connection at terminals ª1º and ª2º of the SRS coil 2±pin
connector at the base of the steering column, terminal ª1º
and ª2º of the driver air bag assembly 2±pin connector at
the top of the steering column, SDM terminals ª3º and ª4º
or a poor wire to terminal connection in IB05±YEL orIB06±YEL/BLK. The test for this diagnostic trouble code
is only run while the ªAIR BAGº warning lamp is
performing the bulb check, unless DTC 17 or DTC 26 is
detected. 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 21 Driver Deployment 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
deployment loop resistance.
Is driver resistance more than 3.7 ohms?
Go to Step 3Go to Chart A
31. Ignition switch ªOFF.º
2. Disconnect SRS coil assembly yellow 2±pin connector located
at base of steering column is seated properly.
Is the 2±pin connector connected properly?
Go to Step 4
Seat SRS coil
assembly 2±pin
connector
properly
Go to Step 8
41. Disconnect and inspect the SRS coil assembly yellow 2±Pin
connector located base of steering column.
2. If ok, reconnect the SRS coil assembly yellow 2±pin
connector.
3. Ignition switch ªON.º
Is DTC 21 current?
Go to Step 5Go to Step 8
51. Ignition switch ªOFF.º
2. Disconnect SRS coil and passenger air bag assembly, yellow
2±pin connector located at the base of steering column and
behind the glove box assembly.
3. Connect SRS driver / passenger load tool 5±8840±2421±0
and appropriate adapter to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch ªON.º
Is DTC 21 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 deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking IB05±YEL and IB06±YEL/BLK, and SDM connector
terminal ª3º and ª4º to locate the root cause.
Was a fault found?
Replace SRS
harness
Go to Step 8
Go to Chart A

9J1±25
RESTRAINT CONTROL SYSTEM
DTC 21 Driver Deployment Loop Resistance High (Cont'd)
StepNo Ye s Action
71. Ignition switch ªOFF.º
2. Disconnect SRS driver / passenger load tool from SRS coil
assembly harness connector.
3. Connect SRS driver / passenger load tool 5±8840±2421±0 on
the top of steering column.
4. Reconnect SRS coil assembly harness connector as the base
of steering column.
5. Ignition switch ªON.º
Is DTC 21 current?
Ignition switch
ªOFFº
Replace SRS coil
assembly
Go to Step 8Ignition switch
ªOFFº
Replace driver air
bag assembly
Go to Step 8
81. 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 8

RESTRAINT CONTROL SYSTEM 9J1±26
DTC 22 Driver Deployment 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
deployment loop voltages are measured to ensure they
are within their respective normal voltage ranges.
The SDM then proceeds with the ªResistance
Measurement Testº ªDriver Bag Lowº terminal ª4º is
grounded through a current sink and the driver current
source connected to ªDriver Bag Highº terminal ª3º allows
a known amount of current to flow. By monitoring the
voltage difference between ªDriver Bag Highº and ªDriver
Bag Lowº the SDM calculates the combined resistance of
the driver air bag assembly, SRS coil assembly, harness
wiring IB05±YEL and IB06±YEL/BLK and connector
terminal contact.
DTC Will Set When:
The combined resistance of the driver air bag assembly,
SRS Coil assembly, harness wiring IB05±YEL and
IB06±YEL/BLK 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 22.
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 steering column.
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
SRS coil assembly yellow 2±pin connector located
at the base of steering column.
6. This test determines whether the malfunction is due
to shortening in the wiring.
7. This test determines whether the malfunction is in
the SRS coil assembly or the driver air bag
assembly.
Diagnostic Aids:
An intermittent condition is likely to be caused by a short
between IB05±YEL or IB06±YEL/BLK or a

9J1±27
RESTRAINT CONTROL SYSTEM
malfunctioning shorting clip on the driver air bag
assembly or SRS coil assembly which would require
replacement of the component. The test for this
diagnostic trouble code is only run while the ªAIR BAGº
warning lamp is performing the bulb check, unless DTC17 or DTC 26 is detected. 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 22 Driver Deployment 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
deployment loop resistance.
Is driver deployment loop resistance less than 1.7 OHMS?
Go to Step 3Go to Chart A
31. Ignition switch ªOFF.º
2. Make sure the SRS coil assembly yellow 2±pin connector
located at the base of steering column is seated properly.
Is the 2±pin connector connected properly?
Go to Step 4
Seat driver air
bag assembly
2±pin connector
properly
Go to Step 8
41. Disconnect and inspect the SRS coil assembly yellow 2±pin
connector located base of steering column.
2. If ok, reconnect the SRS coil assembly yellow 2±pin
connector.
3. Ignition switch ªON.º
Is DTC 22 current?
Go to Step 5Go to Step 8
51. Ignition switch ªOFF.º
2. Disconnect SRS coil and passenger air bag assembly, yellow
2±pin connector located at the base of steering column and
behind the glove box assembly.
3. Connect SRS driver / passenger load tool 5±8840±2421±0
and appropriate adapter to SRS coil and passenger air bag
assembly harness connectors.
4. Ignition switch ªON.º
Is DTC 22 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 deployment loop.
3. Use the high resolution ohmmeter mode of the DVM while
checking IB05±YEL and IB06±YEL/BLK, and SDM connector
terminal ª3º and ª4º to locate the root cause.
Was a fault found?
Replace SRS
harness
Go to Step 8
Go to Chart A