ECO mode ISUZU TROOPER 1998 Service Repair Manual

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

RESTRAINT CONTROL SYSTEM 9J1±34
DTC 26 Driver 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. Use scan tool data list function, read and record the driver
differential voltage.
Is driver VDIF more than 4.25 volts?
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 yellow 2±pin connector connected properly?
Go to Step 4
Seat driver air
bag assembly
2±pin connector
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 26 current?
Go to Step 5Go to Step 8
51. Ignition switch ªOFFº.
2. Disconnect SRS coil and passenger air bag assembly, yellow
2±pin connectors 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 26 current?
Go to Step 6Go to Step 7
61. Ignition switch ªOFF.º
2. There has been an open circuit in the driver inflator
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
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
steering column 2±pin connector.
4. Reconnect SRS coil assembly harness connector at the base
of steering column.
5. Ignition switch ªON.º
Is DTC 26 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±46
warning lamp is performing the bulb check. 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 31 Passenger Pretensioner 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
pretensioner loop resistance.
Is passenger resist. more than 3.7 ohms?
Go to Step 3Go to Chart A
31. Ignition switch ªOff.º
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 ªON.º
Is DTC 31 current?
Go to Step 5Go to Step 7
51. Ignition switch ªOff.º
2. Disconnect 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 31 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 increase in the total circuit resistance of the
passenger 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?
Repeat the ªSRS
Diagnostic
System Checkº
Go to Step 7

RESTRAINT CONTROL SYSTEM 9J1±48
performing the bulb check. 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 32 Passenger Pretensioner 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 pretensioner 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 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 ªON.º
Is DTC 32 Current?
Go to Step 5Go to Step 7
51. Ignition switch ªOff.º
2. Disconnect 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 32 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 a decrease in the total circuit resistance of 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?
Repeat the ªSRS
Diagnostic
System Checkº
Go to Step 7

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

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

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

RESTRAINT CONTROL SYSTEM 9J1±58
DTC 44 Driver 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. Use scan tool data list function, read and record the driver
pretensioner circuit differential voltage.
Is driver pretensioner VDIF more than 4.25 volts?
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 seated
properly.
Is the yellow 2±pin connector connected properly?
Go to Step 4
Seat driver
pretensioner
assembly 2±pin
connector
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 44 current?
Go to Step 5Go to Step 7
51. Ignition switch ªOFFº.
2. Disconnect driver pretensioner assembly, yellow 2±pin
connectors 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 44 current?
Go to Step 6Go to Step 7
61. Ignition switch ªOFF.º
2. There has been an open circuit in 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