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Symptom List:
LEFT SIACM, NO PCI TRANSMISSION - STORED
LEFT SIACM, NO PCM MESSAGE - STORED
LEFT SIACM, SEAT SQUIB CIRCUIT OPEN - STORED
LEFT SIACM, SEAT SQUIB CIRCUIT SHORT - STORED
LEFT SIACM, SEAT SQUIB SHORT TO BATTERY - STORED
LEFT SIACM, SEAT SQUIB SHORT TO GROUND - STORED
ORC, INTERROGATE LEFT SIACM - STORED
ORC, NO LEFT SIACM MESSAGE - STORED
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be LEFT SIACM, NO PCI TRANS-
MISSION - STORED.
When Monitored and Set Condition:
LEFT SIACM, NO PCI TRANSMISSION - STORED
When Monitored: With the ignition in the On position and the Left SIACM transmitting
information on the PCI BUS.
Set Condition: The code will set if, the Left SIACM cannot detect the Left SIACM
transmitting information on the PCI BUS for 4 consecutive seconds. NOTE: Any PCI Bus
Failure will cause this code to set.
LEFT SIACM, SEAT SQUIB CIRCUIT OPEN - STORED
When Monitored: When the ignition is ON, the Left SIACM monitors the Left Seat Squib
circuits for high resistance.
Set Condition: The Left SIACM has detected an open circuit or high resistance on the
Left Seat Squib circuits.
LEFT SIACM, SEAT SQUIB CIRCUIT SHORT - STORED
When Monitored: When the ignition is on, the Left SIACM monitors the resistance of the
Left Seat Squib circuits.
Set Condition: The Left SIACM has detected low resistance in the Left Seat Squib
circuits.
LEFT SIACM, SEAT SQUIB SHORT TO BATTERY - STORED
When Monitored: When the ignition is on, the Left SIACM monitors the voltage of the
Left Seat Squib circuits.
Set Condition: The Left SIACM has detected high voltage on the Left Seat Squib circuits.
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AIRBAG
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POSSIBLE CAUSES
CHECKING FOR ACTIVE LEFT SIACM DTCS
STORED CODE PRESENT
TEST ACTION APPLICABILITY
1 Turn ignition on.
NOTE: Ensure the battery is fully charged.
Active codes must be resolved before diagnosing stored codes.
With the DRBIIIt, record and erase all DTCs from all modules.
With the DRB III monitor active codes as you work through the system.
Wiggle the wiring harness and connectors of the Airbag System.
NOTE: Check connectors - Clean and repair as necessary.
The following additional checks may assist you in identifying a possible intermittent
problem:
- Visually inspect related wire harness connectors. Look for broken, bent, pushed out,
spread, corroded, or contaminated terminals.
- Visually inspect related harnesses. Look for chafed, pierced, pinched or partially
broken wire.
- Refer to Wiring Diagrams and Technical Service Bulletins that may apply.
Did the DTC become active ?All
Ye s®Select appropriate symptom from Symptom List and continue
with diagnosis.
No®No problem found at this time. NOTE: interrogate the ORC and
Right SIACM for DTCs. Erase all codes in all airbag modules
before returning vehicle to customer.
57
AIRBAG
LEFT SIACM, NO PCI TRANSMISSION - STORED ÐContinued
Page 87 of 4284

Symptom:
LEFT SIACM, NO PCM MESSAGE - ACTIVE
POSSIBLE CAUSES
PCM, PCI COMMUNICATION FAILURE
LSIACM, NO PCI MESSAGE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, select BODY, BODY COMPUTER, and PCM MONITOR.
With the DRBIIIt, read the PCM MONITOR.
Does the DRB show PCM ACTIVE ON THE BUS?All
Ye s®Go To 2
No®Refer to category9COMMUNICATION CATEGORY9and select
the related symptom.
Perform AIRBAG VERIFICATION TEST - VER 1.
2WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
WARNING: IF THE LEFT SIDE IMPACT AIRBAG CONTROL MODULE IS
DROPPED AT ANY TIME, IT MUST BE REPLACED.
If there are no possible causes remaining, view repair.All
Repair
Replace the Left Side Impact Airbag Control Module in accordance
with Service Instructions. WARNING: make sure the battery is
disconnected and wait 2 minutes before proceeding.
Perform AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.
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AIRBAG
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Symptom:
LEFT SIACM, SEAT SQUIB CIRCUIT OPEN - ACTIVE
When Monitored and Set Condition:
LEFT SIACM, SEAT SQUIB CIRCUIT OPEN - ACTIVE
When Monitored: When the ignition is On, the Left SIACM monitors the Left Seat Squib
circuits for high resistance.
Set Condition: The Left SIACM has detected an open circuit or high resistance on the left
Seat Squib circuits.
POSSIBLE CAUSES
LEFT SEAT AIRBAG MODULE CIRCUIT OPEN
LEFT SEAT SQUIB LINE 1 CIRCUIT OPEN
LEFT SEAT SQUIB LINE 2 CIRCUIT OPEN
LSIACM, LEFT SEAT SQUIB CIRCUIT OPEN
TEST ACTION APPLICABILITY
1NOTE: Ensure that the battery is fully charged.
WARNING: TURN IGNITION OFF, DISCONNECT THE BATTERY AND WAIT
TWO MINUTES BEFORE PROCEEDING.
CAUTION: DO NOT PLACE AN INTACT UNDEPLOYED SEAT BACK PAD-
DED SIDE DOWN ON A HARD SURFACE, THE AIRBAG WILL PROPEL
INTO THE AIR IF ACCIDENTALLY DEPLOYED, AND COULD RESULT IN
SERIOUS OR FATAL INJURY.
Disconnect the Left Seat Airbag inline connector located between the seat back and
seat cushion.
NOTE: Check connectors - Clean and repair as necessary.
Connect the SRS Load Tool 8443 Passenger cable to the Left Seat Airbag inline
connector.
WARNING: TURN IGNITION ON, THEN RECONNECT THE BATTERY.
With the DRBIIIt, read the Left SIACM active DTC's.
Does the DRB show LEFT SEAT SQUIB CIRCUIT OPEN?All
Ye s®Go To 2
No®Replace Left Seat Airbag.
Perform AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
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AIRBAG
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TEST ACTION APPLICABILITY
2WARNING: TURN IGNITION OFF, DISCONNECT THE BATTERY AND WAIT
TWO MINUTES BEFORE PROCEEDING.
CAUTION: DO NOT PLACE AN INTACT UNDEPLOYED SEAT BACK PAD-
DED SIDE DOWN ON A HARD SURFACE, THE AIRBAG WILL PROPEL
INTO THE AIR IF ACCIDENTALLY DEPLOYED, AND COULD RESULT IN
SERIOUS OR FATAL INJURY.
Disconnect the Left Seat Airbag inline connector located between the seat back and
seat cushion.
Do not disconnect the airbag connectors at the base of the seat.
Disconnect the Left Side Impact Airbag Control Module Connector.
NOTE: Check connectors - Clean and repair as necessary.
Connect the SRS Load Tool 8443 SIACM Adaptor to the Left SIACM connector.
Measure the resistance of the Left Seat Squib Line 1 circuit between the Left SIACM
connector and the Left Seat Airbag connector.
Is the resistance below 1.0 ohms ?All
Ye s®Go To 3
No®Repair open or high resistance in the Left Seat Squib Line 1
circuit.
Perform AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
3WARNING: TURN IGNITION OFF, DISCONNECT THE BATTERY AND WAIT
TWO MINUTES BEFORE PROCEEDING.
CAUTION: DO NOT PLACE AN INTACT UNDEPLOYED SEAT BACK PAD-
DED SIDE DOWN ON A HARD SURFACE, THE AIRBAG WILL PROPEL
INTO THE AIR IF ACCIDENTALLY DEPLOYED, AND COULD RESULT IN
SERIOUS OR FATAL INJURY.
Disconnect the Left Seat Airbag inline connector located between the seat back and
seat cushion.
Do not disconnect the airbag connectors at the base of the seat.
Disconnect the Left Side Impact Airbag Control Module connector.
NOTE: Check connectors - Clean and repair as necessary.
Connect the SRS Load Tool 8443 SIACM Adaptor to the Left SIACM connector.
Measure the resistance of the Left Seat Squib Line 2 circuit between the Left SIACM
connector and the Left Seat Airbag connector.
Is the resistance below 1.0 ohms?All
Ye s®Go To 4
No®Repair open or high resistance in the Left Seat Squib Line 2
circuit.
Perform AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
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AIRBAG
LEFT SIACM, SEAT SQUIB CIRCUIT OPEN - ACTIVE ÐContinued
Page 90 of 4284
TEST ACTION APPLICABILITY
4WARNING: TURN IGNITION OFF, DISCONNECT THE BATTERY AND WAIT
TWO MINUTES BEFORE PROCEEDING.
WARNING: IF THE LEFT SIDE IMPACT AIRBAG CONTROL MODULE IS
DROPPED AT ANY TIME, IT MUST BE REPLACED.
If there are no possible causes remaining, view repair.All
Repair
Replace the Left Side Impact Airbag Control Module in accordance
with the Service information. WARNING: Make sure the battery
is disconnected and wait 2 minutes before proceeding.
Perform AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
61
AIRBAG
LEFT SIACM, SEAT SQUIB CIRCUIT OPEN - ACTIVE ÐContinued
Page 91 of 4284

Symptom:
LEFT SIACM, SEAT SQUIB CIRCUIT SHORT - ACTIVE
When Monitored and Set Condition:
LEFT SIACM, SEAT SQUIB CIRCUIT SHORT - ACTIVE
When Monitored: When the ignition is on, the Left SIACM monitors the resistance of the
Left Seat Squib circuits.
Set Condition: The Left SIACM has detected low resistance in the Left Seat Squib
circuits.
POSSIBLE CAUSES
LEFT SEAT AIRBAG CIRCUIT SHORT
LEFT SEAT SQUIB LINE 1 SHORT TO LINE 2
LSIACM, LEFT SEAT SQUIB CIRCUIT SHORT
TEST ACTION APPLICABILITY
1NOTE: Ensure that the battery is fully charged.
WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
CAUTION: DO NOT PLACE AN INTACT UNDEPLOYED SEAT BACK PAD-
DED SIDE DOWN ON A HARD SURFACE, THE AIRBAG WILL PROPEL
INTO THE AIR IF ACCIDENTALLY DEPLOYED, AND COULD RESULT IN
SERIOUS OR FATAL INJURY.
Disconnect the Left Seat Airbag inline connector located between the seat back and
seat cushion.
Do not disconnect the airbag connectors at the base of the seat.
NOTE: Check connectors - Clean repair as necessary.
Connect the SRS Load Tool 8443 SIACM Adaptor to the LSIACM connector.
Turn Ignition On and then reconnect the Battery.
With the DRB, read the active codes.
Does the DRB show LEFT SEAT SQUIB CIRCUIT SHORT?All
Ye s®Go To 2
No®Replace Left Seat Airbag.
Perform AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.
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AIRBAG
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TEST ACTION APPLICABILITY
2WARNING: Turn Ignition OFF. Disconnect the Battery and wait 2 minutes
before proceeding.
CAUTION: DO NOT PLACE AN INTACT UNDEPLOYED SEAT BACK PAD-
DED SIDE DOWN ON A HARD SURFACE, THE AIRBAG WILL PROPEL
INTO THE AIR IF ACCIDENTALLY DEPLOYED, AND COULD RESULT IN
SERIOUS OR FATAL INJURY.
Disconnect the Left Seat Airbag inline connector located between the seat back and
seat cushion.
Do not disconnect the airbag connectors at the base of the seat.
Disconnect the Left Side Impact Airbag Control Module connector
NOTE: Check connectors - Clean and repair as necessary.
Connect the SRS Load Tool 8443 SIACM Adaptor to the Left Seat Airbag connector.
Measure the resistance between the Left Seat Squib Line 1 and line 2 at the Left Side
Impact Airbag Control Module connector.
Is the resistance below 5.0 Ohms?All
Ye s®Repair Left Seat Squib Line 1 short to the Left Seat Squib Line 2
circuit.
Perform AIRBAG VERIFICATION TEST - VER 1.
No®Go To 3
NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.
3WARNING: TURN IGNITION OFF, DISCONNECT THE BATTERY AND WAIT
TWO MINUTES BEFORE PROCEEDING.
WARNING: IF THE LEFT SIDE IMPACT AIRBAG CONTROL MODULE IS
DROPPED AT ANY TIME, IT MUST BE REPLACED.
If there are no possible causes remaining, view repair.All
Repair
Replace the Left Side Impact Airbag Control Module in accordance
with Service Instructions. WARNING: make sure the battery is
disconnected and wait 2 minutes before proceeding.
Perform AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.
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AIRBAG
LEFT SIACM, SEAT SQUIB CIRCUIT SHORT - ACTIVE ÐContinued