display ISUZU AXIOM 2002 Service Repair Manual

9J1±7
RESTRAINT CONTROL SYSTEM
Chart A SDM Integrity Check
WARNING: DURING SERVICE PROCEDURES. BE VERY CAREFUL WHEN HANDLING A SENSING AND
DIAGNOSTIC MODULE (SDM). NEVER STRIKE OR JAR THE SDM. NEVER POWER UP THE SRS WHEN THE
SDM IS NOT RIGIDLY ATTACHED TO THE VEHICLE. ALL SDM AND MOUNTING BRACKET FASTENERS MUST
BE CAREFULLY TORQUED AND THE ARROW MUST BE POINTING TOWARD THE FRONT OF THE VEHICLE
TO ENSURE PROPER OPERATION OF THE SRS. THE SDM COULD BE ACTIVATED WHEN POWERED WHILE
NOT RIGIDLY ATTACHED TO THE VEHICLE WHICH COULD CAUSE DEPLOYMENT AND RESULT IN
PERSONAL INJURY.
Step
ActionYe sNo
11. This chart assumes that the ªSRS Diagnostic System Checkº
and either a symptom chart or a diagnostic trouble code chart
diagnosis have been performed When all circuitry outside the
SDM has been found to operate properly, as indicated by the
appropriate diagnostic chart, and the symptom or DTC
remains current, the following diagnostic procedures must be
performed to verify the need for SDM Replacement.
2. Ignition switch ªOFF.º
3. Reconnect all SRS components, ensure all components are
properly mounted.
4. Ensure the ignition switch has been ªOFFº for at least 15
seconds.
5. Confirm ªAIR BAGº warning lamp as ignition switch is turned
ªON.º
Does warning lamp flash 7 times then go ªOFFº?
The symptom or
DTC is no longer
occurring.
Clear SRS
diagnostic trouble
codes.
Repeat the ªSRS
Diagnostic
System Check.º
Go to Step 2
2Using a scan tool, request diagnostic trouble code display.
Is the same symptom or DTC occurring as was when the ªSRS
Diagnostic System Check º was first performed?Ignition switch
ªOFF.º
Go to the
appropriate chart
for the indicated
malfunction.
Go to Step 3
31. Clear ªSRS Diagnostic Trouble Codes.º
2. Ignition switch ªOFFº for at least two minutes.
3. Confirm ªAIR BAGº warning lamp as ignition switch is turned
ªON.º
Does warning lamp flash 7 times then go ªOFFº?SRS is functional
and free of
malfunctions.
No further
diagnosis is
required.
Go to
Step 4
Ignition switch
ªOFF.º
Replace SDM.
Go to
Step 4
4Reconnect all SRS components, ensure all components are
properly mounted.
Was this step finished?Repeat the ªSRS
Diagnostic
System Check.º
Go to Step 4

9J1±9
RESTRAINT CONTROL SYSTEM
Chart B ªAIR BAGº Warning Lamp Comes ªONº Steady
StepActionYe sNo
11. When measurements are requested in this chart use J±39200
DVM with correct terminal adapter from J±35616±A.
2. Ignition switch ªOFF.º
3. Connect scan tool to data link connector, Follow directions as
given in the scan tool instruction manual.
4. Ignition switch ªON.º
5. Request SRS diagnostic trouble code display.
Does scan tool indicate ªNo Data Receivedº?
Go to Step 2 Go to Step 3
21. Ignition switch ªOFF.º
2. Inspect SDM harness connector connection to SDM.
Is it securely connected to the SDM?
Ignition switch
ªOFF.º
Replace SDM.
Go to
Step 5
Connect SDM
securely to
de±activate
shorting clip in
SDM harness
connector.
Go to
Step 5
3Using scan tool, request SRS data list.
Is ªignitionº more than 9 volts?
Go to Step 4
Ignition switch
ªOFF.º
Replace SDM.
Go to
Step 5
41. Ignition switch ªOFF.º
2. Disconnect SRS coil and passenger air bag assemblies.
Yellow 2±pin connectors located at base of steering column
and behind the glove box assembly.
3. Disconnect SDM.
4. Measure resistance from SDM harness connector terminal ª6º
to ground.
Does J±39200 display ª0Lº (infinite)?
Go to Chart A.
Replace SRS
harness.
Go to
Step 5
5Reconnect all SRS components, ensure all components are
properly mounted.
Was this step finished?Repeat the ªSRS
Diagnostic
System Check.º
Go to Step 5

RESTRAINT CONTROL SYSTEM 9J1±22
5. This test determines whether the malfunction is in
CKT IB08±YEL/RED.
Diagnostic Aids:
An intermittent condition is likely to be caused by a short
to ground in the passenger air bag assembly circuit.Inspect CKTs IB07±YEL/GRN and IB08±YEL/RED
carefully for cutting or chafing. If the wiring pigtail of the
passenger air bag assembly is damaged, the component
must be replaced.
DTC 18 Passenger Deployment Loop Short To Ground
StepActionYe sNo
1Was the ªSRS Diagnostic System Checkº performed?
Go to Step 2
Go to the ªSRS
Diagnostic
System Check.º
21. When measurements are requested in this chart use J±39200
DVM with correct terminal adapter from J±35616±A.
2. Ignition switch ªOFF.º
3. Connect scan tool data link connector. Follow directions as
given in the scan tool operator's manual.
4. Ignition switch ªON.º
5. Read passenger sense LO.
Is passenger sense LO less than 1.5 volts?
Go to Step 3 Go to Chart A .
31. Ignition switch ªOFF.º
2. Disconnect passenger air bag assembly yellow 2±pin
connector behind the glove box assembly..
3. Leave driver air bag assembly connected.
Connect SRS driver / passenger load tool J±41433 and
appropriate adapter to passenger air bag assembly harness
connector.
4. Ignition switch ªON.º
Is DTC 18 current?
Go to Step 4
Ignition switch
ªOFF.º
Replace
passenger air
bag assembly.
Go to
Step 6
41. Ignition switch ªOFF.º
2. Disconnect SRS driver / passenger load tool.
3. Measure resistance on SDM harness connector from terminal
ª15º to terminal ª6º (ground).
Does J±39200 display ª0Lº (infinite)?
Go to Step 5
Replace SRS
harness.
Go to
Step 6
5Measure resistance on SDM harness connector from terminal ª6º
ª16º to terminal (ground).
Does J±39200 display ª0Lº (infinite)?
Go to Chart A .
Replace SRS
harness.
Go to
Step 6
61. Reconnect all components, ensure all component are properly
mounted.
2. Clear diagnostic trouble codes.
Was this step finished?
Repeat the ªSRS
Diagnostic
System Check.º
Go to Step 6

RESTRAINT CONTROL SYSTEM 9J1±24
5. This test determines whether the malfunction is in
CKT IB08±YEL/RED.
Diagnostic Aids:
An intermittent condition is likely to be caused by a short
to B+ in the passenger air bag assembly circuit. Inspect
CKTs IB07±YEL/GRN and IB08±YEL/RED carefully forcutting or chafing. If the wiring pigtail of the passenger air
bag assembly is damaged, the component must be
replaced. A careful inspection of CKT IB07±YEL/GRN
and IB08±YEL/RED, including the passenger air bag
assembly pigtail is essential to ensure that the
replacement SDM will not be damaged.
DTC 19 Passenger Deployment Loop Short To Voltage
CAUTION: When DTC 19 has been set, it is necessary to replace the SDM. Setting DTC 19 and 25 or 51 or 53
will also cause DTC 71 to set. When a scan tool ªCLEAR CODESº command is issued and the malfunction
is no longer present, DTC 71 will remain current. Ensure that the short to voltage condition is repaired prior
to installing a replacement SDM to avoid damaging the SDM.
Step
ActionYe sNo
1Was the ªSRS Diagnostic System Checkº performed?
Go to Step 2
Go to the ªSRS
Diagnostic
System Check.º
21. When measurements are requested in this chart use J±39200
DVM with correct terminal adapter from J±35616±A.
2. Ignition switch ªOFF.º
3. Connect scan tool data link connector. Follow directions as
given in the scan tool operator's manual.
4. Ignition switch ªON.º
5. Read passenger sense LO.
Is passenger sense LO more than 3.5 volts?
Go to Step 3 Go to Chart A .
31. Ignition switch ªOFF.º
2. Disconnect passenger air bag assembly yellow 2±pin
connector behind the glove box assembly.
3. Leave driver air bag assembly connected.
4. Connect SRS driver / passenger load tool J±41433 and
appropriate adapter to passenger air bag assembly harness
connector.
5. Ignition switch ªON.º
Is passenger sense LO more than 3.5 volts?
Go to Step 4
Ignition switch
ªOFF.º
Replace
passenger air
bag assembly.
Go to
Step 6
41. Ignition switch ªOFF.º
2. Disconnect SDM.
3. Disconnect SRS driver / passenger load tool.
4. Measure resistance on SDM harness connector from terminal
ª15º to terminal ª12º (IGNITION 1).
Does J±39200 display ª0Lº (infinite)?
Go to Step 5
Replace SRS
harness.
Go to
Step 6
5Measure resistance on SDM harness connector from terminal
ª16º to terminal ª12º (IGNITION 1).
Does J±39200 display ª0Lº (infinite)?
Go to Chart A .
Replace SRS
harness.
Go to
Step 6
61. Reconnect all components, ensure all component are properly
mounted.
2. Ignition switch ªON.º
Is passenger sense LO less than 3.5 volts?Ignition switch
ªOFF.ºReplace
SDM.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 Check.º
Go to Step 7

RESTRAINT CONTROL SYSTEM 9J1±32
5. This test determines whether the malfunction is in
CKT IB06±YEL/BLK.
6. 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
to ground in the driver air bag assembly circuit. Inspect
CKTs IB05±YEL and IB06±YEL/BLK carefully for cutting
or chafing.
DTC 24 Driver Deployment Loop Short To Ground
StepActionYe sNo
1Was the ªSRS Diagnostic System Checkº performed?
Go to Step 2
Go to the ªSRS
Diagnostic
System Check.º
21. When measurements are requested in this chart use J±39200
DVM with correct terminal adapter from J±35616±A.
2. Ignition switch ªOFF.º
3. Connect scan tool data link connector. Follow directions as
given in the scan tool operator's manual.
Ignition switch ªON.º
4. Read driver sense LO.
Is driver sense LO less than 1.5 volts?
Go to Step 3 Go to Chart A .
31. Ignition switch ªOFF.º
2. Disconnect SRS coil assembly yellow 2±pin connector located
at base of the steering column. Leave passenger air bag
assembly connected.
3. Connect SRS driver / passenger load tool J±41433 and
appropriate adapter to SRS coil assembly harness connector.
4. Ignition switch ªON.º
Is DTC 24 current?
Go to Step 4 Go to Step 6
41. Ignition switch ªOFF.º
2. Disconnect SDM.
3. Disconnect SRS driver / passenger load tool.
4. Measure resistance on SDM harness connector ª3º to terminal
ª6º (ground).
Does J±39200 display ª0Lº (infinite)?
Go to Step 5
Replace SRS
harness.
Go to
Step 7
5Measure resistance on SDM harness connector from terminal ª4º
to terminal ª6º (ground).
Does J±39200 display ª0Lº (infinite)?
Go to Chart A .
Replace SRS
harness.
Go to
Step 7
61. Ignition switch ªOFF.º
2. Disconnect SRS driver / passenger load tool J±41433 from
SRS coil assembly harness connector.
3. Connect SRS driver / passenger load tool J±41433 and
appropriate adapter J±35616±A to driver air bag assembly
harness connector. Located top of the steering column.
4. Reconnect SRS coil assembly harness connector as the base
of steering column.
5. Ignition switch ªON.º
Is DTC 24 current?
Ignition switch
ªOFF.º
Replace SRS coil
assembly.
Refer to in this
section 9J±24.
Go to
Step 7
Ignition switch
ªOFF.º
Replace driver air
bag assembly.
Go to
Step 7
71. Reconnect all components, ensure all component are properly
mounted.
2. Clear diagnostic trouble codes.
Was this step finished?
Repeat the ªSRS
Diagnostic
System Check.º
Go to Step 7

9J1±35
RESTRAINT CONTROL SYSTEM
DTC 25 Driver Deployment Loop Short To Ignition
CAUTION: When DTC 25 has been set, it is necessary to replace the SDM. Setting DTC 25 will also cause DTC
71 to set. When a scan tool ªCLEAR CODESº command is issued and the malfunction is no longer present,
DTC 71 will remain current. Ensure that the short to voltage condition is repaired prior to installing a
replacement SDM to avoid damaging the SDM.
Step
ActionYe sNo
1Was the ªSRS Diagnostic System Checkº performed?
Go to Step 2
Go to the ªSRS
Diagnostic
System Check.º
21. When measurements are requested in this chart use J±39200
DVM with correct terminal adapter from J±35616±A.
2. Ignition switch ªOFF.º
3. Connect scan tool data link connector. Follow directions as
given in the scan tool operator's manual.
4. Ignition switch ªON.º
5. Read driver sense LO.
Is driver sense LO more than 3.5 volts?
Go to Step 3 Go to Chart A .
31. Ignition switch ªOFF.º
2. Disconnect SRS coil assembly yellow 2±pin connector at the
base of the steering column. Leave passenger air bag
assembly connected.
Connect SRS driver / passenger load tool J±41433 and
appropriate adapter to SRS coil assembly harness connector.
3. Ignition switch ªON.º
Is driver sense LO more than 3.5 volts?
Go to Step 4 Go to Step 6
41. Ignition switch ªOFF.º
2. Disconnect SDM.
3. Disconnect SRS drive / passenger load tool.
4. Measure resistance on SDM harness connector from terminal
ª3º to terminal ª12º (Ignition 1).
Does J±39200 display ª0Lº (infinite)?
Go to Step 5
Replace SRS
harness.
Go to
Step 7
5Measure resistance on SDM harness connector from terminal ª4º
to terminal ª12º (Ignition 1).
Does J±39200 display ª0Lº (infinite)?
Go to Chart A .
Replace SRS
harness.
Go to
Step 7
61. Ignition switch ªOFF.º
2. Connect SRS driver / passenger load tool J±41433 and
appropriate adapter J±35616±A to driver air bag assembly
harness connector located of top of the steering column.
3. Reconnect SRS coil assembly harness connector as the base
of steering column.
4. Ignition switch ªON.º
Is driver sense LO more than 3.5 volts?
Ignition switch
ªOFF.º
Replace SRS coil
assembly.
Go to
Step 7
Ignition switch
ªOFF.º
Replace driver air
bag assembly.
Go to
Step 7
71. Reconnect all components, ensure all components are
properly mounted.
2. Ignition switch ªON.º
Is passenger sense LO less than 3.5 volts?
Replace SDM.
Go to
Step 8 Go to Chart A .
81. Reconnect all components, ensure all components are
properly mounted.
2. Clear diagnostic trouble codes.
Was this step finished?
Repeat the ªSRS
Diagnostic
System Check.º
Go to Step 8