Supplemental Inflatable Restraint System Cadillac SRX I

Fastener Tightening Specifications

Fastener Tightening Specifications

SIR Schematic Icons

SIR Schematic Icons Icon Icon Definition CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling Zones. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs. IMPORTANT: In order to prevent accidental deployment, the shorting bars close in order to short the connectors when the connectors are separated. Twisted-pair wires provide an effective shield that helps protect sensitive electronic components from electrical interference. If the wires were covered with shielding, install new shielding. In order to prevent electrical interference from degrading the performance of the connected components, you must maintain the proper specification when making any repairs to the twisted-pair wires shown : The wires must be twisted a minimum of 9 turns per 31 cm (12 in) as measured anywhere along the length of the wires The outside diameter of the twisted wires must not exceed 6.0 mm (0.25 in)

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SIR Zone Identification Views

The SIR Zone Identification Views shown below illustrate the approximate location of all SIR components available for the vehicle. This will assist in determining the appropriate SIR Disabling and Enabling Zones for a given service procedure, refer to SIR Disabling and Enabling Zones .

Scheme 9

SIR Connector End Views

Inflatable Restraint Front End Sensor - Left Connector Part Information 15356723 2-Way F GT 150 Series (YE) Pin Wire Color Circuit No. Function A TN/OG 5045 Discriminating Sensor - Low Reference B YE 354 Discriminating Sensor - Signal

Inflatable Restraint Front End Sensor - Right Connector Part Information 15356723 2-Way F GT 150 Series (YE) Pin Wire Color Circuit No. Function A GY 5600 Discriminating Sensor - Low Reference B D-GN 1409 Discriminating Sensor Signal

Inflatable Restraint I/P Module Connector Part Information 15336476 4-Way M Metri-Pack 280 Series (YE) Pin Wire Color Circuit No. Function A1 YE 3025 I/P Module - Stage 1 - High Control A2 OG 3024 I/P Module - Stage 1 - Low Control B1 GY 3027 I/P Module - Stage 2 - High Control B2 PU 3026 I/P Module - Stage 2 - Low Control

Inflatable Restraint Roof Rail Module - Left (AY0) Connector Part Information CA 252912048 2-Way M Metri-Pack 280 Series (YE) Pin Wire Color Circuit No. Function 1 PU/WH 5019 Roof Rail Module - Left - High Control 2 PK 5020 Roof Rail Module - Left - Low Control

Inflatable Restraint Roof Rail Module - Right (AY0) Connector Part Information CA 252912048 2-Way M Metri-Pack 280 Series (YE) Pin Wire Color Circuit No. Function 1 YE/BK 5021 Roof Rail Module - Right - High Control 2 WH/BK 5022 Roof Rail Module - Right - Low Control

Inflatable Restraint Sensing and Diagnostic Module (SDM) Connector Part Information 2-638595-7 60-Way F AMP (YE) Pin Wire Color Circuit No. Function 1 BK/WH 1751 Ground 2-3 - - Not Available 4 WH 3023 Steering Wheel Module - Stage 2 - High Control 5 PK 3022 Steering Wheel Module - Stage 2 - Low Control 6 PU 3026 I/P Module - Stage 2 - Low Control 7 GY 3027 I/P Module - Stage 2 - High Control 8 TN 3021 Steering Wheel Module - Stage 1 - High Control 9 BN 3020 Steering Wheel Module - Stage 1 - Low Control 10 OG 3024 I/P Module - Stage 1 - High Control 11 YE 3025 I/P Module - Stage 1 - High Control 12 D-GN 2105 Side Impact Module - Left - High Control 13 BN 2106 Side Impact Module - Left - Low Control 14 D-BU 2104 Side Impact Module - Right - Low Control 15 GY 2103 Side Impact Module - Right - High Control 16 TN/WH 2118 Seat Belt Pretensioner - Left - High Control 17 OG/BK 2119 Seat Belt Pretensioner - Left - Low Control 18 OG 2117 Seat Belt Pretensioner - Right - Low Control 19 L-GN 2116 Seat Belt Pretensioner - Right - High Control 20 PU/WH 5019 Roof Rail Module - Left - High Control 21 PK 5020 Roof Rail Module - Left - Low Control 22 WH/BK 5022 Roof Rail Module - Right - Low Control 23 YE/BK 5021 Roof Rail Module - Right - High Control 24-27 - - Not Available 28 PK 5017 Seat Belt Switch - Left - Low Reference 29 TN/WH 238 Seat Belt Switch - Left 30 - - Not Available 31 PK 1139 Ignition 1 Voltage 32 PU 1807 Class 2 Serial Data 33 PU 1807 Class 2 Serial Data 34 PK 5018 Occupant Sensor - Serial Data 35-46 - - Not Available 47 WH 2132 Side Impact Sensing Module - Left - Signal 48 D-GN 2134 Side Impact Sensing Module - Right - Signal 49 TN 2133 Side Impact Sensing Module - Right - Voltage 50 YE 2131 Side Impact Sensing Module - Left - Voltage 51-54 - - Not Available 55 TN/OG 5045 Discriminating Sensor - Low Reference 56 GY 5600 Discriminating Sensor - Low Reference 57 D-GN 1409 Discriminating Sensor - Right - Signal 58 YE 354 Discriminating Sensor - Signal 59-60 - - Not Available

Inflatable Restraint Seat Belt Pretensioner - Left Connector Part Information CA252912048 2-Way F (PU/YE) Pin Wire Color Circuit No. Function 1 BK 2118 Seat Belt Pretensioner - Left - High Control 2 WH 2119 Seat Belt Pretensioner - Left - Low Control

Inflatable Restraint Seat Belt Pretensioner - Right Connector Part Information CA252912048 2-Way F (PU/YE) Pin Wire Color Circuit No. Function 1 BK 2116 Seat Belt Pretensioner - Right - High Control 2 WH 2117 Seat Belt Pretensioner - Right - Low Control

Inflatable Restraint Side Impact Module - Left Connector Part Information CA252912048 2-Way F (PU/YE) Pin Wire Color Circuit No. Function 1 WH 2105 Side Impact Module - Left - High Control 2 D-GN 2106 Side Impact Module - Left - Low Control

Inflatable Restraint Side Impact Module - Right Connector Part Information CA252912048 2-Way F (PU/YE) Pin Wire Color Circuit No. Function 1 WH 2103 Side Impact Module - Right - High Control 2 D-GN 2104 Side Impact Module - Right - Low Control

Inflatable Restraint Side Impact Sensing Module (SISM) - Left Connector Part Information 15356726 2-Way F GT 150 Series, Sealed (YE) Pin Wire Color Circuit No. Function A WH 2132 Side Impact Sensing Module - Left - Signal B YE 2131 Side Impact Sensing Module - Left - Voltage

Inflatable Restraint Side Impact Sensing Module (SISM) - Right Connector Part Information 15356726 2-Way F GT 150 Series, Sealed (YE) Pin Wire Color Circuit No. Function A D-GN 2134 Side Impact Sensing Module - Right - Signal B TN 2133 Side Impact Sensing Module - Right - Voltage

Inflatable Restraint Steering Wheel Module C1 Connector Part Information CA-252-92-4R 2-Way F (GY/YE) Pin Wire Color Circuit No. Function 1 TN 3021 Steering Wheel Module - Stage 1 - High Control 2 BN 3020 Steering Wheel Module - Stage 1 - Low Control

Inflatable Restraint Steering Wheel Module C2 Connector Part Information CA-252-92-5Q 2-Way F (PU/YE) Pin Wire Color Circuit No. Function 1 WH 3023 Steering Wheel Module - Stage 2 - High Control 2 PK 3022 Steering Wheel Module - Stage 2 - Low Control

Rollover Sensor Connector Part Information 6189-1024 6-Way F Sealed .64 Series (YE) Pin Wire Color Circuit No. Function 1 PK 1139 Ignition 1 Voltage 2-4 - - Not Used 5 PK 5018 Occupant Sensor Serial Data 6 BK/WH 1751 Ground

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - SIR

Begin the system diagnosis with Diagnostic System Check - Vehicle in Vehicle DTC Information. The Diagnostic System Check - SIR will provide the following information

1. The identification of the control modules which commands the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of Diagnostic System Check - Vehicle in Vehicle DTC Information, will identify the correct procedure for diagnosing the system and where the procedure is located.

Scan Tool Data List

The SIR Scan Tool Data List contains all the restraint system related parameters that are available on the scan tool. The parameters in the list are arranged in alphabetical order. The column, "Data List," indicates the location of the parameter within the scan tool menu selections.

Use the SIR Scan Tool Data List as directed by a diagnostic table or in order to supplement the diagnostic procedures. Begin all of the diagnostic procedures with the SIR Diagnostic System Check. Use the SIR Scan Tool Data List after the following are determined

1. There is no published DTC procedure nor published symptom procedure for the customer concern.
2. The DTC or symptom diagnostic procedure indicated by the diagnostic system check does not resolve the customer concern.

The Typical Data Values are obtained from a properly operating vehicle under the conditions specified in the first row of the Scan Tool Data List table. Comparison of the parameter values from the suspect vehicle with the Typical Data Values may reveal the source of the customer concern.

SIR Scan Tool Data List

Scan Tool Data Definitions

The SIR scan tool data definitions contain a brief description of all SIR related parameters available on the scan tool. The parameters that are available on the scan tool are listed below in alphabetical order.

Circuit Description

The passenger frontal deployment loop consists of the following components

1. A dual stage inflatable restraint instrument panel (I/P) module
2. The I/P module high circuits for both stages 1 and 2
3. The I/P module low circuits for both stages 1 and 2

There are 2 shorting bars used within the I/P module connector which will short together both I/P module stage 1 high and low circuits, and both I/P module stage 2 high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. During a frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop, in order to deploy the I/P module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory.

DTC Descriptors

This diagnostic procedure supports the following DTCs

1. DTC B0012 Passenger Frontal Deployment Loop (Stage 2) Resistance Low
2. DTC B0013 Passenger Frontal Deployment Loop (Stage 2) Open
3. DTC B0014 Passenger Frontal Deployment Loop (Stage 2) Voltage Out of Range
4. DTC B0016 Passenger Frontal Deployment Loop (Stage 1) Resistance Low
5. DTC B0017 Passenger Frontal Deployment Loop (Stage 1) Open
6. DTC B0018 Passenger Frontal Deployment Loop (Stage 1) Voltage Out of Range

Conditions for Running the DTC

Ignition 1 voltage is within the normal operating voltage range.

Conditions for Setting the DTC

1. DTC B0012 stage 2 or B0016 stage 1 will set when the I/P module deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
2. DTC B0013 stage 2 or B0017 stage 1 will set when one of the following conditions occur: The I/P module high circuit is less than 2.4 volts and the I/P module deployment loop is more than 6 ohms for 500 milliseconds. The I/P module deployment loop resistance is more than 4.8 ohms for 500 milliseconds.
3. DTC B0014 stage 2 or B0018 stage 1 will set when one of the following conditions occur: The I/P module high and/or low circuits is short to ground or short to voltage for 500 milliseconds. The I/P module high circuit is less than 2.4 volts and I/P module deployment loop resistance is less than 6 ohms for 500 milliseconds.

Action Taken When the DTC Sets

The SDM commands the AIR BAG indicator ON via class 2 serial data.

Conditions for Clearing the DTC

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Diagnostic Aids

The following are possible causes of the malfunction

1. A short between the I/P module stage 1 or stage 2, high and low circuits
2. An open or a high resistance in the I/P module stage 1 or stage 2, high or low circuits
3. A short to ground or a short to voltage in the I/P module stage 1 or stage 2, high or low circuits
4. The I/P module connector
5. The SDM connector
6. A malfunctioning I/P module
7. A malfunctioning SDM

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 4: This step tests to see if the malfunction is caused by the I/P module.
2. 6: This step tests to see what DTCs are present. If DTC B0012 or B0016 is present, test the I/P module for a short between high and low circuits in stage 1 or stage 2. If DTC B0013 or B0017 is present, test the I/P module high and low circuits for an open and for high resistance in stage 1 or stage 2. If DTC B0014 or B0018 is present, test the I/P module high and low circuits for a short to ground and for a short to voltage in stage 1 or stage 2.

DTC B0012, B0013, B0014, B0016, B0017, or B0018

The driver frontal deployment loop consists of the following components

1. A dual stage inflatable restraint steering wheel module
2. The inflatable restraint steering wheel module coil
3. The steering wheel module high circuits for both stages 1 and 2
4. The steering wheel module low circuits for both stages 1 and 2

There are 2 shorting bars used within the steering wheel module coil connector which will short together both the steering wheel module stage 1 high circuit and the steering wheel module stage 1 low circuit, and both the steering wheel module stage 2 high circuit and the steering wheel module stage 2 low circuit, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. During a frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop, in order to deploy the steering wheel module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory.

This diagnostic procedure supports the following DTCs

1. DTC B0022 Driver Frontal Deployment Loop (Stage 1) Resistance Low
2. DTC B0024 Driver Frontal Deployment Loop (Stage 1) Voltage Out of Range
3. DTC B0026 Driver Frontal Deployment Loop (Stage 1) Open
4. DTC B0042 Driver Frontal Deployment Loop (Stage 2) Resistance Low
5. DTC B0043 Driver Frontal Deployment Loop (Stage 2) Voltage Out of Range
6. DTC B0044 Driver Frontal Deployment Loop (Stage 2) Open

Ignition 1 voltage is within the normal operating voltage range.

1. DTC B0022 stage 1 or B0042 stage 2 will set when the steering wheel module deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
2. DTC B0024 stage 1 or B0043 stage 2 will set when one of the following conditions occur: The steering wheel module high and/or low circuits are shorted to ground or shorted to voltage for 500 milliseconds. The steering wheel module high circuit is less than 2.4 volts and the steering wheel module deployment loop resistance is less than 6 ohms for 500 milliseconds.
3. DTC B0026 stage 1 or B0044 stage 2 will set when one of the following conditions occurs: The steering wheel module high circuit is less than 2.4 volts and the steering wheel module deployment loop is more than 6 ohms for 500 milliseconds. The steering wheel module deployment loop resistance is more than 4.8 ohms for 500 milliseconds.

The SDM commands the AIR BAG indicator ON via class 2 serial data.

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

The following are possible causes of the malfunction

1. A short between the steering wheel module stage 1 or stage 2, high and low circuits
2. An open or a high resistance in the steering wheel module stage 1 or stage 2, high or low circuits
3. A short to ground or a short to voltage in the steering wheel module stage 1 or stage 2, high or low circuits
4. The steering wheel module coil connector
5. The SDM connector
6. A malfunctioning steering wheel module
7. A malfunctioning steering wheel module coil
8. A malfunctioning SDM

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The numbers below refer to the step numbers on the diagnostic table.

1. 5: This step tests to see if the malfunction is caused by the steering wheel module or by the steering wheel module coil.
2. 7: This step tests to see what DTCs are present. If DTC B0022 or B0042 is present, test the steering wheel module for a short between high and low circuits in stage 1 or stage 2. If DTC B0024 or B0043 is present, test the steering wheel module high and low circuits for an open and for high resistance in stage 1 or stage 2. If DTC B0026 or B0044 is present, test the steering wheel module high and low circuits for an open and for high resistance in stage 1 or stage 2.

DTC B0022, B0024, B0026, B0042, B0043, or B0044

The passenger side deployment loop consists of the following components

1. An inflatable restraint side impact module - RF
2. The inflatable restraint side impact module wiring harness
3. The side impact module - RF high circuits
4. The side impact module - RF low circuits

A shorting bar is used within the side impact module - RF connector. The shorting bar will short together the side impact module - RF high circuit, and the side impact module - RF low circuit when the connector is disconnected. This helps prevent unwanted deployment of the inflator module during servicing. During a side or frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop. This flow of current will deploy the side impact module - RF. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory.

This diagnostic procedure supports the following DTCs

1. DTC B0028 Right Front Side Deployment Loop Resistance Low
2. DTC B0029 Right Front Side Deployment Loop Open
3. DTC B0030 Right Front Side Deployment Loop Voltage Out of Range

Ignition 1 voltage is within the normal operating voltage range.

1. DTC B0028 will set when the side impact module - RF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
2. DTC B0029 will set when one of the following conditions occurs: Side impact module - RF high circuit is less than 2.4 volts and the side impact module - RF deployment loop is more than 6 ohms for 500 milliseconds. Side impact module - RF deployment loop resistance is more than 4.8 ohms for 500 milliseconds.
3. DTC B0030 will set when one of the following conditions occur: Side impact module - RF high and/or low circuits is short to ground or short to voltage for 500 milliseconds. Side impact module - RF high circuit is less than 2.4 volts and side impact module - RF deployment loop resistance is less than 6 ohms for 500 milliseconds.

The SDM commands the AIR BAG indicator ON via class 2 serial data.

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

The following are possible causes of the malfunction

1. A short between the side impact module - RF high and low circuits
2. An open or a high resistance in the side impact module - RF high or low circuits
3. A short to ground or a short to voltage in the side impact module - RF high or low circuits
4. The side impact module - RF connector
5. The SDM connector
6. A malfunctioning side impact module - RF
7. A malfunctioning SDM

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The numbers below refer to the step numbers on the diagnostic table.

1. 5: This step tests to see if the malfunction is caused by the side impact module - RF or by the side impact module - RF wiring harness.
2. 7: This step tests to see what DTCs are present. If DTC B0028 is present, test the side impact module - RF for a short between high and low circuits. If DTC B0029 is present, test the side impact module - RF high and low circuits for an open and for high resistance. If DTC B0030 is present, test the side impact module - RF high and low circuits for a short to ground or a short to voltage.

DTC B0028, B0029, or B0030

The driver side deployment loop consists of the following components

1. An inflatable restraint side impact module - LF
2. The inflatable restraint side impact module wiring harness
3. The side impact module - LF high circuits
4. The side impact module - LF low circuits

A shorting bar is used within the side impact module - LF connector. The shorting bar will short together the side impact module - LF high circuit, and the side impact module - LF low circuit when the connector is disconnected. This helps prevent unwanted deployment of the inflator module during servicing. During a side or frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop. This flow of current will deploy the side impact module - LF. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory.

This diagnostic procedure supports the following DTCs

1. DTC B0040 Left Front Side Deployment Loop Resistance Low
2. DTC B0041 Left Front Side Deployment Loop Open
3. DTC B0045 Left Front Side Deployment Loop Voltage Out of Range

Ignition 1 voltage is within the normal operating voltage range.

1. DTC B0040 will set when the side impact module - LF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
2. DTC B0041 will set when one of the following conditions occurs: Side impact module - LF high circuit is less than 2.4 volts and the side impact module - LF deployment loop is more than 6 ohms for 500 milliseconds. Side impact module - LF deployment loop resistance is more than 4.8 ohms for 500 milliseconds.
3. DTC B0045 will set when one of the following conditions occur: Side impact module - LF high and/or low circuits is short to ground or short to voltage for 500 milliseconds. Side impact module - LF high circuit is less than 2.4 volts and side impact module - LF deployment loop resistance is less than 6 ohms for 500 milliseconds.

The SDM commands the AIR BAG indicator ON via class 2 serial data.

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

The following are possible causes of the malfunction

1. A short between the side impact module - LF high and low circuits
2. An open or a high resistance in the side impact module - LF high or low circuits
3. A short to ground or a short to voltage in the side impact module - LF high or low circuits
4. The side impact module - LF connector
5. The SDM connector
6. A malfunctioning side impact module - LF
7. A malfunctioning SDM

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The numbers below refer to the step numbers on the diagnostic table.

1. 5: This step tests to see if the malfunction is caused by the side impact module - LF or by the side impact module - LF wiring harness.
2. 7: This step tests to see what DTCs are present. If DTC B0040 s present, test the side impact module - LF for a short between high and low circuits. If DTC B0041 is present, test the side impact module - LF high and low circuits for an open and for high resistance. If DTC B0045 is present, test the side impact module - LF high and low circuits for a short to ground or a short to voltage.

DTC B0040, B0041, or B0045

The inflatable restraint sensing and diagnostic module (SDM) contains sensing devices that converts vehicle velocity changes to electrical signals. The SDM processes the generated electrical signals and compares them to values stored in memory. When the generated signals exceed the stored values, the SDM performs additional signal processing and compares the generated signals to signals stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the inflator modules, and causing DTC B0051 to set.

DTC Descriptor

This diagnostic procedure supports the following DTC

DTC B0051 Deployment Commanded

Ignition 1 voltage is within the normal operating voltage range.

The DTC will set if one of the following conditions occur

1. The SDM detects a frontal crash of sufficient force to warrant deployment of the frontal inflator modules.
2. The SDM detects a side impact crash of sufficient force to warrant deployment of a side inflator module.

1. The SDM commands the AIR BAG indicator ON via class 2 serial data.
2. The SDM records crash data.

DTC B0051 is a latched code. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.

DTC B0051

The inflatable restraint sensing and diagnostic module (SDM) contains sensing devices that converts vehicle velocity changes to electrical signals. The SDM processes the generated electrical signals and compares them to values stored in memory. When the generated signals exceed the stored values, the SDM performs additional signal processing and compares the generated signals to signals stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the inflator modules. DTC B0053 will set along with DTC B0051 when a deployment occurs while a circuit malfunction is present in any one of the deployment loops.

This diagnostic procedure supports the following DTC

DTC B0053 Deployment Commanded with Loop DTCs Present

Ignition 1 voltage is within the normal operating voltage range.

The DTC will set if one of the following conditions occur

1. The SDM detects a frontal crash of sufficient force to warrant deployment of the frontal inflator modules.
2. The SDM detects a side impact crash of sufficient force to warrant deployment of a side inflator module.

1. The SDM commands the AIR BAG indicator ON via class 2 serial data.
2. The SDM records crash data.

DTC B0053 is a latched code. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.

DTC B0053 will be accompanied by another DTC, other than DTC B1000 and DTC B0051. Repair the malfunction causing the other DTCs before installing a new SDM.

DTC B0053

The passenger seat belt pretensioner deployment loop consists of a seat belt pretensioner - RF, the seat belt pretensioner - RF high and seat belt pretensioner - RF low circuits. A shorting bar used within the seat belt pretensioner connector will short together both seat belt pretensioner high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the pretensioner during servicing. During a frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop, in order to deploy the seat belt pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.

This diagnostic procedure supports the following DTCs

1. DTC B0057 Right Front Pretensioner Deployment Loop Resistance Low
2. DTC B0058 Right Front Pretensioner Deployment Loop Open
3. DTC B0059 Right Front Pretensioner Deployment Loop Voltage Out of Range

Ignition 1 voltage is within the normal operating voltage range.

1. DTC B0057 will set when the seat belt pretensioner - RF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
2. DTC B0058 will set when one of the following conditions occurs: Seat belt pretensioner - RF high circuit is less than 2.4 volts and the seat belt pretensioner - RF deployment loop is more than 6 ohms for 500 milliseconds. Seat belt pretensioner - RF deployment loop resistance is more than 4.8 ohms for 500 milliseconds.
3. DTC B0059 when one of the following conditions occur: Seat belt pretensioner - RF high and/or low circuits is short to ground or short to voltage for 500 milliseconds. Seat belt pretensioner - RF high circuit is less than 2.4 volts and seat belt pretensioner - RF deployment loop resistance is less than 6 ohms for 500 milliseconds.

The SDM commands the AIR BAG indicator ON via class 2 serial data.

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

The following are possible causes of the malfunction

1. A short between the seat belt pretensioner - RF high and low circuits
2. An open or a high resistance in the seat belt pretensioner - RF high or low circuits
3. A short to ground or a short to voltage in the seat belt pretensioner - RF high or low circuits
4. The seat belt pretensioner - RF connector
5. The SDM connector
6. A malfunctioning seat belt pretensioner
7. A malfunctioning SDM

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The numbers below refer to the step numbers on the diagnostic table.

1. 4: Tests to see if the malfunction is caused by the seat belt pretensioner - RF.
2. 6: Tests to see what DTCs are present. If DTC B0057 is present, test the seat belt pretensioner - RF for a short between high and low circuits. If DTC B0058 is present, test the seat belt pretensioner - RF high and low circuits for an open and for high resistance. If DTC B0059 is present, test the seat belt pretensioner - RF high and low circuits for a short to ground and for a short to voltage.

DTC B0057, B0058, or B0059

The driver roof rail deployment loop consists of the following components

1. An inflatable restraint side impact module - Left
2. The roof rail impact module - Left high circuit
3. The roof rail impact module - Left low circuit

A shorting bar used within the roof rail module connector will short together both roof side rail module - left high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. During a side or frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop, in order to deploy the roof side rail module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.

This diagnostic procedure supports the following DTCs

1. DTC B0061 Left Front Roof Rail Deployment Loop Resistance Low
2. DTC B0062 Left Front Roof Rail Deployment Loop Open
3. DTC B0068 Left Front Roof Rail Deployment Loop Voltage Out of Range

Ignition 1 voltage is within the normal operating voltage range.

1. DTC B0061 will set when the roof rail module - left deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
2. DTC B0062 will set when one of the following conditions occurs: Roof rail module - left high circuit is less than 2.4 volts and the roof rail module - left deployment loop is more than 6 ohms for 500 milliseconds. Roof rail module - left deployment loop resistance is more than 4.8 ohms for 500 milliseconds.
3. DTC B0068 when one of the following conditions occur: Roof rail module - left high and/or low circuits is short to ground or short to voltage for 500 milliseconds. Roof rail module - left high circuit is less than 2.4 volts and roof rail module - left deployment loop resistance is less than 6 ohms for 500 milliseconds.

The SDM commands the AIR BAG indicator ON via class 2 serial data.

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

The following are possible causes of the malfunction

1. A short between the roof rail module - left high and low circuits.
2. An open or a high resistance in the roof rail module - left high or low circuits.
3. A short to ground or a short to voltage in the roof rail module - left high or low circuits.
4. The roof rail module - left connector
5. The SDM connector
6. A malfunctioning roof rail module - left
7. A malfunctioning SDM

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The numbers below refer to the step numbers on the diagnostic table.

1. 4: Tests to see if the malfunction is caused by the roof rail module - left.
2. 6: Tests to see what DTCs are present. If DTC B0061 is present, test the roof rail module - left for a short between high and low circuits. If DTC B0062 is present, test the roof rail module - left high and low circuits for an open and for high resistance. If DTC B0068 is present, test the roof rail module - left high and low circuits for a short to ground and for a short to voltage.

DTC B0061, B0062, or B0068

The driver seat belt pretensioner deployment loop consists of a seat belt pretensioner - LF, the seat belt pretensioner - LF high and seat belt pretensioner - LF low circuits. A shorting bar used within the seat belt pretensioner connector will short together both seat belt pretensioner high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the pretensioner during servicing. During a frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop, in order to deploy the seat belt pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.

This diagnostic procedure supports the following DTCs

1. DTC B0064 Left Front Pretensioner Deployment Loop Resistance Low
2. DTC B0065 Left Front Pretensioner Deployment Loop Open
3. DTC B0066 Left Front Pretensioner Deployment Loop Voltage Out of Range

Ignition 1 voltage is within the normal operating voltage range.

1. DTC B0064 will set when the seat belt pretensioner - LF deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
2. DTC B0065 will set when one of the following conditions occurs: Seat belt pretensioner - LF high circuit is less than 2.4 volts and the seat belt pretensioner - LF deployment loop is more than 6 ohms for 500 milliseconds. Seat belt pretensioner - LF deployment loop resistance is more than 4.8 ohms for 500 milliseconds.
3. DTC B0066 when one of the following conditions occur: Seat belt pretensioner - LF high and/or low circuits is short to ground or short to voltage for 500 milliseconds. Seat belt pretensioner - LF high circuit is less than 2.4 volts and seat belt pretensioner - LF deployment loop resistance is less than 6 ohms for 500 milliseconds.

The SDM commands the AIR BAG indicator ON via class 2 serial data.

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

The following are possible causes of the malfunction

1. A short between the seat belt pretensioner - LF high and low circuits
2. An open or a high resistance in the seat belt pretensioner - LF high or low circuits
3. A short to ground or a short to voltage in the seat belt pretensioner - LF high or low circuits
4. The seat belt pretensioner - LF connector
5. The SDM connector
6. A malfunctioning seat belt pretensioner
7. A malfunctioning SDM

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The numbers below refer to the step numbers on the diagnostic table.

1. 4: Tests to see if the malfunction is caused by the seat belt pretensioner - LF.
2. 6: Tests to see what DTCs are present. If DTC B0064 is present, test the seat belt pretensioner - LF for a short between high and low circuits. If DTC B0065 is present, test the seat belt pretensioner - LF high and low circuits for an open and for high resistance. If DTC B0066 is present, test the seat belt pretensioner - LF high and low circuits for a short to ground and for a short to voltage.

DTC B0064, B0065, or B0066

The passenger roof rail deployment loop consists the following components

1. An inflatable restraint side impact module - Right
2. The roof rail impact module - Right high circuit
3. The roof rail impact module - Right low circuit

A shorting bar used within the roof rail module connector will short together both roof rail module - right high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing. During a side or frontal crash of sufficient force, the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop, in order to deploy the roof side rail module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, and for shorts to ground or voltage. If a malfunction is detected, a DTC will be stored in memory.

This diagnostic procedure supports the following DTCs

1. DTC B0069 Right Front Roof Rail Deployment Loop Resistance Low
2. DTC B0070 Right Front Roof Rail Deployment Loop Open
3. DTC B0071 Right Front Roof Rail Deployment Loop Voltage Out of Range

Ignition 1 voltage is within the normal operating voltage range.

1. DTC B0069 will set when the roof rail module - right deployment loop resistance is less than 1.3 ohms for 500 milliseconds.
2. DTC B0070 will set when one of the following conditions occurs: Roof rail module - right high circuit is less than 2.4 volts, and the roof rail module - right deployment loop is more than 6 ohms for 500 milliseconds. Roof rail module - right deployment loop resistance is more than 4.8 ohms for 500 milliseconds.
3. DTC B0071 when one of the following conditions occur: Roof rail module - right high and/or low circuits are short to ground, or short to voltage for 500 milliseconds. Roof rail module - right high circuit is less than 2.4 volts, and roof rail module - right deployment loop resistance is less than 6 ohms for 500 milliseconds.

The SDM commands the AIR BAG indicator ON via class 2 serial data.

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

The following are possible causes of the malfunction

1. A short between the roof rail module - right high and low circuits
2. An open or a high resistance in the roof rail module - right high or low circuits
3. A short to ground or a short to voltage in the roof rail module - right high or low circuits
4. The roof rail module - right connector
5. The SDM connector
6. A malfunctioning roof rail module - right
7. A malfunctioning SDM

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The numbers below refer to the step numbers on the diagnostic table.

1. 4: This step tests to see if the malfunction is caused by the roof rail module - right.
2. 6: This step tests to see what DTCs are present. If DTC B0069 is present, test the roof rail module - right for a short between high and low circuits. If DTC B0070 is present, test the roof rail module - right high and low circuits for an open and for high resistance. If DTC B0071 is present, test the roof rail module - right high and low circuits for a short to ground and for a short to voltage.

DTC B0069, B0070, or B0071

The inflatable restraint side impact sensor (SIS) utilizes a unidirectional 2-wire circuit. The SIS modulates current on the interface to send ID, State of Health, and deployment commands to the inflatable restraint sensing and diagnostic module (SDM). The SDM serves as a power source and a ground for the SIS. When the ignition is turned on and input power from the SDM is first detected, the SIS responds by performing internal diagnostics and sending an ID to the SDM. The SDM considers the ID to be valid if the response time is less than 5 seconds. The SIS continually communicates status messages to the SDM, which determines if a fault is present in the SIS circuit. When a fault is detected, the SDM resets the SIS twice by removing and reapplying power to it. If the fault is still present, the SDM will set a diagnostic trouble code (DTC).

This diagnostic procedure supports the following DTCs

1. DTC B0077 Driver Side Impact Sensor (SIS) Performance
2. DTC B0078 Passenger Side Impact Sensor (SIS) Performance
3. DTC B0079 Incorrect Driver Side Impact Sensor (SIS) Installed
4. DTC B0080 Discard Driver Side Impact Sensor (SIS)
5. DTC B0081 Incorrect Passenger Side Impact Sensor (SIS) Installed
6. DTC B0082 Discard Passenger Side Impact Sensor (SIS)

Ignition 1 voltage is within the normal operating voltage range.

1. DTC B0077 for the SIS - LF or B0078 for the SIS - RF will set when one of the following conditions occur: A valid ID message is not received within 5 seconds of the SIS being powered up. Status message is not received. The SDM has reset the SIS twice without detecting a valid ID message.
2. DTC B0079 for the SIS - LF or B0081 for the SIS - RF will set when one of the following conditions occur: The SDM has received an ID message from the SIS which does not match the ID stored in the SDM memory. The SDM has reset the SIS twice without detecting a correct ID message.
3. DTC B0080 for the SIS - LF or B0082 for the SIS - RF will set when the SDM has received a NOK message from the SIS.

The SDM commands ON the AIR BAG warning lamp via class 2 serial data.

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

The following are conditions that may cause the malfunction

1. A short to ground or voltage in the SIS circuit
2. High or low resistance in the SIS circuit
3. Improper SIS installed on vehicle

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The numbers below refer to the step numbers on the diagnostic table.

1. 7: This step tests the SIS signal and SIS voltage circuits for an open or high resistance.
2. 8: This step tests between the SIS signal and SIS voltage circuits for continuity.
3. 9: This step tests the SIS signal and SIS voltage circuits for a short to voltage.

DTC B0077, B0078, B0079, B0080, B0081, or B0082

The inflatable restraint front end sensor utilizes a unidirectional 2-wire circuit. The front end sensor modulates current on the interface to send ID, State of Health, and deployment commands to the inflatable restraint sensing and diagnostic module (SDM). The SDM serves as a power source and a ground for the front end sensor. When the ignition is turned on and input power from the SDM is first detected, the front end sensor responds by performing internal diagnostics and sending an ID to the SDM. The SDM considers the ID to be valid if the response time is less than 5 seconds. The front end sensor continually communicates status messages to the SDM, which determines if a fault is present in the front end sensor circuit. When a fault is detected, the SDM resets the front end sensor twice by removing and reapplying power. If the fault is still present, the SDM will set a diagnostic trouble code (DTC).

This diagnostic procedure supports the following DTCs

1. DTC B0100 Front End Sensor 1 Performance
2. DTC B0101 Discard Front End Sensor 1
3. DTC B0102 Incorrect Front End Sensor 1 Installed
4. DTC B0103 Front End Sensor 2 Performance
5. DTC B0104 Discard Front End Sensor 2
6. DTC B0105 Incorrect Front End Sensor 2 Installed

Ignition 1 voltage is within the normal operating voltage range.

1. DTC B0100 or B0103 will set when one of the following conditions occur: A valid ID message is not received within 5 seconds of the front end sensor being powered up. Status message is not received. The SDM has failed twice to reset the front end sensor.
2. DTC B0101 or B0104 will set when the SDM has received 4 consecutive NOK (Not OK) messages from the front end sensor.
3. DTC B0102 or B0105 will set when one of the following conditions occur: The SDM has received an ID message from the front end sensor which does not match the ID stored in the SDM memory. When 2 front end sensor resets are attempted without the correct identification being detected by the SDM.

The SDM commands the AIR BAG indicator ON via class 2 serial data.

1. The condition responsible for setting the DTC no longer exists.
2. You issue a scan tool CLEAR DTCs command.
3. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

The following are conditions that may cause the malfunction

1. A short to ground or voltage in the front end sensor circuits
2. High or low resistance in the front end sensor circuits
3. Improper front end sensors installed on vehicle

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and connectors may result in misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

The numbers below refer to the step numbers on the diagnostic table

1. 2: Tests the communication status of both front end sensors.
2. 6: Tests for a short to ground, a high resistance, or an open in the front end sensor signal circuit.
3. 7: Tests for a short to ground, a high resistance, or an open in the front end sensor low reference circuit.
4. 8: Tests for a short to voltage in the front end sensor signal and low reference circuits.

DTC B0100, B0101, B0102, B0103, B0104, or B0105

When the ignition is turned ON the inflatable restraint sensing and diagnostic module (SDM) compares the restraint ID that is stored in the SDM to the restraints ID that is stored in the dash integration module (DIM). The restraints ID that is being compared to contains the last 4 digits of SDM part number. The SDM receives these messages and compares them to information stored in memory. This DTC is set when the SDM receives a restraints ID over the class 2 communication circuit from the DIM that is different from the ID that is stored in the SDM memory.

This diagnostic procedure supports the following DTC

DTC B1001 Option Configuration Error

Ignition 1 voltage is within the normal operating voltage range.

1. The restraints ID that is stored in the SDM does not match the restraints ID that is stored in the DIM.
2. This test is only run once during power initialization.

1. The SDM commands ON the AIR BAG warning lamp via class 2 serial data.
2. The SDM disables all deployments.

The restraints ID that is stored in the SDM matches the restraints ID that is stored in the DIM.

This DTC is an indication that an incorrect SDM is installed in the vehicle, or that the SDM and/or the DIM was replace without reprogramming the DIM with the new information.

The numbers below refer to the step numbers in the diagnostic table

1. 2: This test inspects for current SDM DTCs.
2. 3: This test inspects to see if the correct VIN is programmed in the DIM.
3. 4: This step explains that the DIM must be programmed.
4. 6: This test inspects to see if after clearing the DTCs, if this DTC is current, that it is possible that the wrong SDM has been installed.

DTC B1001

Diagnostic Fault Information

DTC B3855, B3856, or B3857

Circuit/System Description

The inflatable restraint vehicle rollover sensor (ROS) utilizes battery power supply and a bidirectional interface circuit. The ROS modulates current on the interface to send ID, State of Health, and deployment commands to the inflatable restraint sensing and diagnostic module (SDM). When the ignition is turned on the ROS responds by performing internal diagnostics and sending an ID to the SDM. The ROS continually communicates status messages to the SDM, which determines if a fault is present in the ROS circuit. If the fault is present, the SDM will set a diagnostic trouble code (DTC).

Ignition voltage is between 9-16 volts.

B3855

1. A valid ID message is not received within 5 seconds of the ROS being powered up.
2. The SDM has not received a status message.

B3856

1. The SDM has received a NOK message from the ROS.
2. A ROS internal fault exists for a 127 ignition cycles.

B3857

The SDM has received an ID message from the ROS that does not match the ID stored in the SDM memory.

The SDM commands the AIR BAG indicator ON via serial data communications.

1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Electrical Information Reference

1. «Circuit Testing»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__circuit-testing)
2. «Connector Repairs»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__wiring-repairs)

Circuit/System Testing

1. Ignition ON, use a scan tool and check for DTC B3856 or B3857. Verify DTC B3856 or B3857 is not set current. If DTC B3856 or B3857 is set current then replace the ROS. Refer to vehicle rollover sensor replacement in Repair Instructions
2. Use the scan tool to check for DTC B3855, if DTC B3855 is set current then disconnect the ROS connector. Refer to vehicle rollover sensor replacement in Repair Instructions for connector location.
3. Test the ROS ignition 1voltage and ground circuits for an open or high resistance. Verify that a open or high resistance does not exist. If any of the above conditions are found make the appropriate repair.
4. Remove the SDM connector. Refer to SDM replacement in Repair Instructions for connector location.
5. Test the serial data link circuit between the SDM and ROS for a short to voltage, short to ground, or open/low resistance. Verify that a short to voltage, short to ground, or open/low resistance does not exist. If any of the above conditions are found make the appropriate repair.
6. Reconnect all SIR components. Ignition ON, use the scan tool to clear the DTCs then recheck for DTCs. If DTC B3855 was current replace the ROS. After replacement refer to Repair Verification.

Repair Instructions

1. «Inflatable Restraint Vehicle Rollover Sensor Replacement»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/cadillac/srx/i-2003-2009/remont/communication-devices/#computerintegrating-systems__control-module-references) for SDM replacement, setup, and programming

Repair Verification

Ignition ON, use the scan tool to clear the DTCs then recheck for DTCs.

1. If DTC B3855 was current replace the SDM

Symptoms - SIR

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information, before using the symptom tables in order to verify that all of the following are true: There are no diagnostic trouble codes (DTCs) set. The inflatable restraint sensing and diagnostic module (SDM) can communicate via the serial data link.
2. Review the SIR system description and operation in order to familiarize yourself with the system functions. Refer to «SIR System Description and Operation»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the SIR system. Refer to «Checking Aftermarket Accessories»(/cadillac/srx/i-2003-2009/remont/body-electrical/#how-to-diagnosis-repair-the-wiring-systems-testing__checking-aftermarket-accessories) in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

Refer to Air Bag Indicator Circuit Malfunction in order to diagnose the symptom.

When the ignition is turned ON, the instrument panel cluster (IPC) flashes the AIR BAG indicator seven times. The inflatable restraint sensing and diagnostic module (SDM) performs diagnostic tests on the SIR system and then commands the IPC to turn the AIR BAG indicator OFF if no SIR malfunction exists. The AIR BAG indicator is controlled by the SDM via serial data communications. If the ignition 1 voltage is outside of the normal operating voltage range 9-16 volts, the SDM will command the IPC to turn the AIR BAG indicator ON with no diagnostic trouble codes (DTCs) present then disables all deployment loops.

SIR Schematics

SIR Connector End Views

1. Ignition ON, use the scan tool to request the SIR data list display. Observe the Battery Voltage Parameter. The battery voltage on the scan tool should read 9-16 volts. If the voltage is less than 9 volts refer to «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) .
2. Using the scan tool go to Body and Accessories, then go onward to Special Functions to Instrument Panel Cluster, and then go to Display Test. In the Display Test mode you can turn ON or OFF all the instrument panel indicators when commanded ON. Commanded the IPC indicators ON. The Air Bag indicator should turn ON. If the Air Bag indicator does not turn ON replace the IPC. Note: The AIR BAG warning indicator is not serviceable separately. The IPC must be serviced/replaced as a complete unit.
3. Replace the SDM.

Control Module References for IPC and SDM replacement, setup, and programming.

SIR Disabling and Enabling Zones

The SIR system has been divided into Disabling and Enabling Zones. When performing service on or near SIR components or SIR wiring, it may be necessary to disable the SIR components in that zone. It may be necessary to disable more than one zone depending on the location of other SIR components and the area being serviced, refer to SIR Zone Identification Views . Refer to the illustration below, to identify the specific zone or zones in which service will be performed. After identifying the zone or zones, proceed to the disabling and enabling procedures for that particular zone or zones.

Scheme 10

SIR Disabling and Enabling Zones

SIR Service Precautions

The inflatable restraint sensing and diagnostic module (SDM) maintains a reserved energy supply. The reserved energy supply provides deployment power for the air bags. Deployment power is available for as much as 1 minute after disconnecting the vehicle power. Disabling the SIR system prevents deployment of the air bags from the reserved energy supply.

General Service Instructions

The following are general service instructions which must be followed in order to properly repair the vehicle and return it to its original integrity

1. Do not expose inflator modules to temperatures above 65°C (150°F).
2. Verify the correct replacement part number. Do not substitute a component from a different vehicle.
3. Use only original GM replacement parts available from your authorized GM dealer. Do not use salvaged parts for repairs to the SIR system.

Discard any of the following components if it has been dropped from a height of 91 cm (3 feet) or greater

1. Inflatable restraint sensing and diagnostic module (SDM)
2. Inflatable restraint I/P module
3. Inflatable restraint steering wheel module
4. Inflatable restraint steering wheel module coil
5. Inflatable restraint side impact modules (front seat)
6. Inflatable restraint roof side rail modules
7. Inflatable restraint side impact sensors (SIS)
8. Inflatable restraint seat belt pretensioners
9. Inflatable restraint front end sensor

Disabling Procedure

1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Adjust the right rear seat to the rear of vehicle.
5. Pull the carpet away from under the right side of rear seat.
6. When the carpet is pulled away from the right rear seat the right rear fuse center (1) will be exposed, then remove the fuse center top cover.
7. Locate and remove the SIR fuse from the right rear fuse center.
8. Open front hood, and locate both front end sensors (3,4).
9. Remove both connector position assurance (CPA) (1,6) from left and right front end sensor connectors (2,5).
10. Remove both connectors (2,5) from left and right front end sensors (3,4).

Enabling Procedure

1. Remove the key from the ignition switch.
2. Connect both connectors (2,5) to the left and right front end sensors (3,4).
3. Install both CPAs (1,6) to the left and right front end sensor connectors (2,5).
4. Close front hood.
5. Install the SIR fuse into the right rear fuse center (1).
6. Install the right rear fuse center cover.
7. Position the carpet back under the right rear seat.
8. Use caution while reaching in and turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
9. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information.

1. Turn the steering wheel so that the vehicle's wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Adjust the right rear seat to the rear of vehicle.
5. Pull the carpet away from under the right side of rear seat.
6. When the carpet is pulled away from the rear seat the right rear fuse center (1) will be exposed, then remove the fuse center top cover.
7. Locate and remove the SIR fuse from the right rear fuse center.
8. When disabling the roof rail module, go to step 9. If the side impact sensor (SIS) needs disabling, go to step 12.
9. Remove the left carpet retainer trim. Refer to «Carpet Retainer Replacement - Rear»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
10. Remove the connector position assurance (CPA) (3) from the left/driver roof rail module yellow connector (2).
11. Disconnect the left roof rail module connector (2) from the left roof rail module (1).
12. Remove the left center pillar trim panel. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
13. Remove the SIS CPA (1) from the left SIS connector (2).
14. Remove the SIS connector (2) from the SIS (3).

1. Remove the key from the ignition switch.
2. When enabling the SIS, proceed to step 3. If the roof rail module needs enabling, go to step 6.
3. Connect the SIS connector (2) to the SIS (3).
4. Connect the CPA (1) to the SIS connector (2).
5. Install the left center pillar trim panel. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
6. Connect the roof rail module yellow connector (2) to the left roof rail module (1).
7. Install the CPA (3) to the left roof rail module connector (2).
8. Install the left carpet retainer trim. Refer to «Carpet Retainer Replacement - Rear»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
9. Install the SIR fuse into the right rear fuse center (1).
10. Install the right rear fuse center cover.
11. Position the carpet back under the right rear seat.
12. Use caution while reaching in and turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
13. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information.

1. Turn the steering wheel so that the vehicle's wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Adjust the right rear seat to the rear of vehicle.
5. Pull the carpet away from under the right side of rear seat.
6. When the carpet is pulled away from the rear seat the right rear fuse center (1) will be exposed, then remove the fuse center top cover.
7. Locate and remove the SIR fuse from the right rear fuse center.
8. Remove the left/driver sound insulator from the instrument panel (I/P) (2). Refer to «Closeout/Insulator Panel Replacement - Left»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
9. Remove the connector position assurance (CPA) from the steering wheel module coil yellow connector (1).
10. Disconnect the steering wheel module coil yellow connector (1) from the vehicle harness yellow connector (3).

1. Remove the key from the ignition switch.
2. Connect the steering wheel module coil yellow connector (3) to the vehicle harness yellow connector (1).
3. Install the CPA to the steering wheel module coil yellow connector (1).
4. Install the left sound insulator to the I/P (2). Refer to «Closeout/Insulator Panel Replacement - Left»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
5. Install the SIR fuse into the right rear fuse center (1).
6. Install the right rear fuse center cover.
7. Position the carpet back under the right rear seat.
8. Use caution while reaching in and turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
9. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information.

1. Turn the steering wheel so that the vehicle's wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Adjust the right rear seat to the rear of vehicle.
5. Pull the carpet away from under the right side of rear seat.
6. When the carpet is pulled away from the rear seat the right rear fuse center (1) will be exposed, then remove the fuse center top cover.
7. Locate and remove the SIR fuse from the right rear fuse center.
8. Remove the right/passenger sound insulator from the instrument panel (I/P) (3). Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
9. Remove the connector position assurance (CPA) from the I/P module yellow connector (2).
10. Disconnect the I/P module yellow connector (1) from the vehicle harness yellow connector (2).

1. Remove the key from the ignition switch.
2. Connect the I/P module yellow connector (1) to the vehicle harness yellow connector (2).
3. Install the CPA to the I/P module yellow connector (2).
4. Install the right sound insulator to the I/P (3). Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
5. Install the SIR fuse into the right rear fuse center (1).
6. Install the right rear fuse center cover.
7. Position the carpet back under the right rear seat.
8. Use caution while reaching in and turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
9. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information.

1. Turn the steering wheel so that the vehicle's wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Adjust the right rear seat to the rear of vehicle.
5. Pull the carpet away from under the right side of rear seat.
6. When the carpet is pulled away from the rear seat the right rear fuse center (1) will be exposed, then remove the fuse center top cover.
7. Locate and remove the SIR fuse from the right rear fuse center.
8. When disabling the roof rail module, go to step 9. If the side impact sensor (SIS) needs disabling, go to step 12.
9. Remove the right carpet retainer trim. Refer to «Carpet Retainer Replacement - Rear»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
10. Remove the connector position assurance (CPA) (2) from the right/passenger roof rail module yellow connector (3).
11. Disconnect the right roof rail module connector (3) from the right roof rail module (1).
12. Remove the right center pillar trim panel. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
13. Remove the SIS CPA (1) from the left SIS connector (2).
14. Remove the SIS connector (2) from the SIS (3).

1. Remove the key from the ignition switch.
2. When enabling the SIS, proceed to step 3. If the roof rail module needs enabling, go to step 6.
3. Connect the SIS connector (2) to the SIS (3).
4. Connect the CPA (1) to the SIS connector (2).
5. Install the right center pillar trim panel. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
6. Connect the roof rail module yellow connector (3) to the right roof rail module (1).
7. Install the CPA (2) to the right roof rail module connector (3).
8. Install the right carpet retainer trim. Refer to «Carpet Retainer Replacement - Rear»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
9. Install the SIR fuse into the right rear fuse center (1).
10. Install the right rear fuse center cover.
11. Position the carpet back under the right rear seat.
12. Use caution while reaching in and turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
13. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information.

1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Adjust the right rear seat to the rear of vehicle.
5. Pull the carpet away from under the right side of rear seat.
6. When the carpet is pulled away from the rear seat the right rear fuse center (1) will be exposed, then remove the fuse center top cover.
7. Locate and remove the SIR fuse from the right rear fuse center.
8. Remove both connector position assurance (CPA) from the LF/driver side impact module and seat belt pretensioner yellow connector (1) which is located under the front of driver seat.
9. Disconnect the LF side impact module and pretensioner yellow connector (1) from the vehicle harness yellow connector.

1. Remove the key from the ignition switch.
2. Connect the LF side impact module and pretensioner yellow connector (1) to the vehicle harness yellow connector.
3. Install both CPA locks to the LF side impact module and pretensioner yellow connector (1).
4. Install the SIR fuse into the right rear fuse center (1).
5. Install the right rear fuse center cover.
6. Position the carpet back under the right rear seat.
7. Use caution while reaching in and turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
8. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information.

1. Turn the steering wheel so that the vehicle's wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Adjust the right rear seat to the rear of vehicle.
5. Pull the carpet away from under the right side of rear seat.
6. When the carpet is pulled away from the rear seat the right rear fuse center (1) will be exposed, then remove the fuse center top cover.
7. Locate and remove the SIR fuse from the right rear fuse center.
8. Remove the right carpet retainer trim. Refer to «Carpet Retainer Replacement - Rear»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
9. Remove the connector position assurance (CPA) (2) from the right/passenger roof rail module yellow connector (3).
10. Disconnect the right roof rail module connector (3) from the right roof rail module (1).
11. Remove the right/passenger sound insulator from the instrument panel (I/P) (3). Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
12. Remove the CPA from the I/P module yellow connector (2).
13. Disconnect the I/P module yellow connector (1) from the vehicle harness yellow connector (2).
14. Remove both CPA locks from the passenger/RF side impact module and seat belt pretensioner yellow connector (1) located under the front of passenger seat.
15. Disconnect the RF side impact module and pretensioner yellow connector from the vehicle harness yellow connector (1).
16. Remove the driver/left sound insulator from the I/P (2). Refer to «Closeout/Insulator Panel Replacement - Left»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
17. Remove the CPA from the steering wheel module coil yellow connector (1).
18. Disconnect the steering wheel module coil yellow connector (1) from the vehicle harness yellow connector (3).
19. Remove both CPA locks from the driver/LF side impact module and seat belt pretensioner yellow connector (1) located under the front of driver seat.
20. Disconnect the LF side impact module and pretensioner yellow connector from the vehicle harness yellow connector (1).
21. Remove the left carpet retainer trim. Refer to «Carpet Retainer Replacement - Rear»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
22. Remove the CPA (3) from the left/driver roof rail module yellow connector (2).
23. Disconnect the left roof rail module connector (2) from the left roof rail module (1).

1. Remove the key from the ignition switch.
2. Connect the roof rail module yellow connector (2) to the left roof rail module (1).
3. Install the CPA (3) to the left roof rail module connector (2).
4. Install the left carpet retainer trim. Refer to «Carpet Retainer Replacement - Rear»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
5. Connect the driver/LF side impact module and seat belt pretensioner yellow connector to the vehicle harness yellow connector (1) located under the front of driver seat.
6. Install both CPA locks to the LF side impact module and pretensioner yellow connector (1).
7. Connect the steering wheel module coil yellow connector (1) to the vehicle harness yellow connector (3).
8. Install the CPA to the steering wheel module coil yellow connector (1).
9. Install the driver/left sound insulator to the I/P (2). Refer to «Closeout/Insulator Panel Replacement - Left»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
10. Connect the passenger/I/P module yellow connector (1) to the vehicle harness yellow connector (2).
11. Install the CPA to the I/P module yellow connector (1).
12. Install the passenger/right sound insulator to the I/P (3). Refer to «Closeout/Insulator Panel Replacement - Right»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages, and Console.
13. Connect the passenger/RF side impact module and seat belt pretensioner yellow connector to the vehicle harness yellow connector (1) located under the front of passenger seat.
14. Install both CPA locks to the RF side impact module and pretensioner yellow connector (1).
15. Connect the roof rail module yellow connector (3) to the right roof rail module (1).
16. Install the CPA (2) to the right roof rail module connector (3).
17. Install the right carpet retainer trim. Refer to «Carpet Retainer Replacement - Rear»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
18. Install the SIR fuse into the right rear fuse center (1).
19. Install the right rear fuse center cover.
20. Position the carpet back under the right rear seat.
21. Use caution while reaching in and turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
22. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information.

1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
2. Turn the ignition switch to the OFF position.
3. Remove the key from the ignition switch.
4. Adjust the right rear seat to the rear of vehicle.
5. Pull the carpet away from under the right side of rear seat.
6. When the carpet is pulled away from the rear seat the right rear fuse center (1) will be exposed, then remove the fuse center top cover.
7. Locate and remove the SIR fuse from the right rear fuse center.
8. Remove both connector position assurance (CPA) from the RF/passenger side impact module and seat belt pretensioner yellow connector (1) which is located under the front of passenger seat.
9. Disconnect the RF side impact module and pretensioner yellow connector (1) from the vehicle harness yellow connector.

1. Remove the key from the ignition switch.
2. Connect the RF side impact module and pretensioner yellow connector (1) to the vehicle harness yellow connector.
3. Install both CPA locks to the RF side impact module and pretensioner yellow connector (1).
4. Install the SIR fuse into the right rear fuse center (1).
5. Install the right rear fuse center cover.
6. Position the carpet back under the right rear seat.
7. Use caution while reaching in and turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
8. Perform the SIR Diagnostic System Check if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/cadillac/srx/i-2003-2009/remont/oem-general-information/#vehicle-dtc-information) in Vehicle DTC Information.

Removal Procedure

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 1»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
2. Remove the connector position assurance (CPA) (1,6) from the wiring harness connector to the inflatable restraint front end sensor (3,4).
3. Disconnect the wiring harness connector (2,5) from the front end sensor (3,4).
4. Loosen the front end sensor mounting fastener (8,9), which is located in the upper tie bar.
5. Remove the front end sensor (3,4) from the upper tie bar.

Installation Procedure

1. Remove any dirt, grease, or other impurities from the mounting surface (7).
2. Position the sensor (3,4) horizontally on the mounting surface.
3. Point the arrow on the sensor toward the front of the vehicle.
4. Install the mounting fasteners (8,9). Tighten: Tighten the fastener (1) to 9 N.m (80 lb in).
5. Connect the harness wiring connector (2,5) to the front end sensor (3,4).
6. Install the CPA (1,6) to the wiring harness connector on the front end sensor.
7. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 1»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 2»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) or «SIR Disabling and Enabling Zone 6»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
2. Move the seat to the full forward position.
3. Remove the center pillar trim panel. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
4. Remove the connector position assurance (CPA) (1) from the harness connector (2) to the inflatable restraint side impact sensor (SIS).
5. Disconnect the harness connector (2) from the SIS (3).
6. Remove the SIS mounting fasteners (2).
7. Remove the SIS (1) from the center pillar.

1. Remove any dirt, grease, or other impurities from the mounting surface.
2. Install the SIS (1) to the center pillar.
3. Install the SIS mounting fasteners (2). Tighten: Tighten the fasteners to 9 N.m (80 lb in).
4. Install the harness connector (2) to the SIS (3).
5. Install the CPA (1) to the SIS harness connector (2).
6. Install the center pillar trim. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
7. Move the seat to the original position.
8. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 2»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) or «SIR Disabling and Enabling Zone 6»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .

Scheme 11

Inflatable Restraint Vehicle Rollover Sensor Replacement

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 8»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
2. Remove the center console. Refer to «Console Replacement - Front Floor»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
3. Remove the connector position assurance (CPA) (1) from the wiring harness connector (2) to the inflatable restraint sensing and diagnostic module (SDM).
4. Push the flex lock button (3) down and move the sliding connector locking cover (4) to the OPEN position.
5. Disconnect the wiring harness connector from the SDM (1).
6. Remove the SDM mounting fasteners (2).
7. Remove the SDM from the console floor.

1. Remove any dirt, grease, or other impurities from the mounting surface.
2. Install the SDM (1) horizontally to the console floor.
3. Point the arrow on the SDM toward the front of the vehicle.
4. Install the SDM mounting fasteners (2). Tighten: Tighten fasteners to 9 N.m (80 lb in).
5. Connect the wiring harness connector (1) to the SDM.
6. Push the flex lock button (3) down and move the sliding connector locking cover (4) to the CLOSE position.
7. Install the CPA (1) to the wiring harness connector (2) to the inflatable restraint SDM.
8. Install the console. Refer to «Console Replacement - Front Floor»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
9. Install the driver and the passenger seats to the original position.
10. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 8»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
11. Program the new SDM into the dash integration module. Refer to «Body Control Module (BCM) Programming/RPO Configuration (DIM)»(/cadillac/srx/i-2003-2009/remont/communication-devices/#computerintegrating-systems) or «Body Control Module (BCM) Programming/RPO Configuration (RIM)»(/cadillac/srx/i-2003-2009/remont/communication-devices/#computerintegrating-systems) in Computer/Integrating Systems.

Tools Required

J 44298 Driver Air Bag Removal Tool. See Special Tools .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 3»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
2. On the back side of the steering wheel are 3 openings for removing the steering wheel module.
3. Adjust and install J 44298 into 1 of the holes. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
4. Pull the handle of the air bag tool away from the instrument panel (I/P) releasing one of the spring loaded fasteners.
5. Repeat this step for the other 2 fasteners.
6. Pull the inflatable restraint module gently away from the steering wheel.
7. Remove the connector position assurance (CPA) (4) and the electrical connector from the steering wheel module.
8. Remove the horn contact lead (2) from the steering column cam tower.
9. Remove the steering wheel module (5).

1. Connect the horn contact lead into the steering column cam tower.
2. Connect the steering wheel module electrical connector and the CPA (4). IMPORTANT: This vehicle is equipped with dual stage air bags, you will find 2 connectors. Match the right color connector to the right color opening in the module. Route the steering wheel module wires, the redundant control wires, and the horn wires correctly.
3. Align the steering wheel module fasteners to the steering column fastener holes.
4. Push the steering wheel module firmly into the steering column in order to engage the fasteners.
5. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 3»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
6. After replacing the module, deploy the old module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Inflator Module Handling and Scrapping»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for proper disposal.

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 3»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
2. Remove the steering column trim covers. Refer to «Steering Column Trim Covers Replacement»(/cadillac/srx/i-2003-2009/remont/ignition-switchsteering-lock/#steering-wheel-and-steering-column) in Steering Wheel and Column.
3. Remove the wire harness assembly from the wire harness strap.
4. Remove the wire harness straps from the wire harness assembly.
5. Remove the wire harness strap from the upper tilt head assembly.
6. Remove the SIR steering wheel module coil retaining clip.
7. Remove the SIR steering wheel module coil.
8. Remove the wave washer from the steering column upper shaft.

1. Align the block tooth on the upper shaft (1) to the 12 o'clock position.
2. Install the wave washer (1) to the steering column upper shaft.
3. Align the SIR steering wheel module coil with the horn tower on the turn signal cancel cam.
4. Install the pre-centered SIR steering wheel module coil to the steering column upper shaft.
5. Remove the centering tab (1) and discard.
6. Install the SIR steering wheel module coil retaining ring. Verify that the ring (1) is firmly seated in the groove on the upper shaft (2).
7. Route the wire harness assembly around the steering column tilt head. Install a wire strap around the wire harness assembly and through the hole on the steering column tilt head assembly.
8. Install wire harness straps to the wire harness assembly.
9. Install the steering column trim covers. Refer to «Steering Column Trim Covers Replacement»(/cadillac/srx/i-2003-2009/remont/ignition-switchsteering-lock/#steering-wheel-and-steering-column) in Steering Wheel and Column.
10. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 3»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 5»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
2. Remove the I/P retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
3. Note the wire harness routing position on the I/P module, to help in assembly.
4. Remove the I/P module mounting fasteners.
5. Remove the I/P module from the I/P.

1. Route the I/P module pigtail down through the I/P.
2. Install the I/P module to the instrument panel.
3. Install the I/P module mounting fasteners. Tighten: Tighten the fasteners to 9 N.m (80 lb in).
4. Route the I/P module wiring harness in place to secure the I/P module yellow 2-way connector clip.
5. Install the I/P retainer. Refer to «Instrument Panel (I/P) Retainer Replacement»(/cadillac/srx/i-2003-2009/remont/gauges-instrument-panels/#instrument-panel-gages-and-console) in Instrument Panel, Gages and Console.
6. Install the I/P module yellow connector to the vehicle harness yellow connector.
7. Install the CPA to the instrument panel module connector.
8. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 5»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
9. After replacing the module, deploy the old module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Inflator Module Handling and Scrapping»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for proper disposal.

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for driver's seat or «SIR Disabling and Enabling Zone 9»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for passenger seat.
2. Move the seat to the full forward position.
3. Remove the seat back panel cover (2) from the seat (1) by pulling out the top of the panel and lifting the bottom away from the seat to release the hook retainers.
4. Remove the 2 bolts (1) from the inflatable restraint side impact module bracket.
5. Remove the module from the seat.
6. Remove the Connector Position Assurance (CPA) from the module electrical connector.
7. Disconnect the electrical connector (1) from the module.

1. Install a new inflatable restraint side impact module bracket.
2. Install the 2 bracket mounting bolts to the module. Tighten: Tighten the bolts to 9 N.m (80 lb in).
3. Connect the electrical connector (1) to the inflatable restraint side impact module.
4. Install the connector position assurance (CPA) to the module electrical connector.
5. Install the module to the seat.
6. Install the 2 bolts (1) to the inflatable restraint side impact module. Tighten: Tighten the bolts to 9 N.m (80 lb in).
7. Install the seat back panel (2) to the seat (1) by sliding the bottom of the panel into place and pushing the top of the panel in until the push-in retainers are secure.
8. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for driver's seat or «SIR Disabling and Enabling Zone 9»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for passenger seat.
9. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Inflator Module Handling and Scrapping»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for driver's seat or «SIR Disabling and Enabling Zone 9»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for passenger seat.
2. Partially remove the seat back panel to access the wiring.
3. Remove the inflatable restraint side impact module (2) from the seat (1). Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) . With the seat back panel removed, the inflatable restraint side impact module wiring harness (3) will be exposed.
4. Remove the retaining clips that fasten the side impact module wiring harness (3) to the seat (1).

1. Install the new side impact module wiring harness (3) to the seat (1).
2. Install the retaining clips that fasten the side impact module wiring harness (3) to the seat (1).
3. Install the side impact module (2) to the seat (1). Refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
4. Install the seat back panel.
5. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for driver's seat or «SIR Disabling and Enabling Zone 9»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) for passenger seat.

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 2»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
2. Remove the windshield garnish molding. Refer to «Garnish Molding Replacement - Windshield Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
3. Remove the center pillar garnish moldings. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
4. Remove the side door opening garnish molding. Refer to «Garnish Molding Replacement - Side Door Opening Frame»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
5. Remove the body side rear trim panel. Refer to «Trim Panel Replacement - Body Side Rear (w/o TB5)»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) or «Trim Panel Replacement - Body Side Rear (w/TB5)»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
6. Remove the connector position assurance (CPA) (2) from the harness connector to the inflatable restraint roof rail module (1).
7. Disconnect the connector (3) from the roof rail module.
8. Lower the headliner to gain clearance to the roof rail module.
9. Remove the fasteners from the roof rail module.
10. Remove the tether from the windshield pillar (1).
11. Remove the roof rail module from the roof.

1. Remove any dirt, grease, or other impurities from the mounting surface.
2. Insert the roof rail module tether to the windshield pillar (1).
3. Install the mounting fasteners to the inflatable restraint roof rail module. Tighten: Tighten the fasteners to 9 N.m (80 lb in).
4. Install the roof rail module connector (3) to the wiring harness.
5. Install the CPA (2) to the roof rail module harness connector.
6. Install the windshield garnish molding. Refer to «Garnish Molding Replacement - Windshield Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
7. Install the center pillar garnish moldings. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
8. Install the side door opening garnish molding. Refer to «Garnish Molding Replacement - Side Door Opening Frame»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
9. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 2»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
10. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Inflator Module Handling and Scrapping»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 2»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
2. Remove the windshield garnish molding. Refer to «Garnish Molding Replacement - Windshield Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
3. Remove the center pillar garnish moldings. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
4. Remove the side door opening garnish molding. Refer to «Garnish Molding Replacement - Side Door Opening Frame»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
5. Remove the body side rear trim panel. Refer to «Trim Panel Replacement - Body Side Rear (w/o TB5)»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) or «Trim Panel Replacement - Body Side Rear (w/TB5)»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
6. Remove the connector position assurance (CPA) (2) from the connector to the inflatable restraint roof rail module (1).
7. Disconnect the connector (3) from the roof rail module.
8. Lower the headliner to gain clearance to the roof rail module.
9. Remove the fasteners from the roof rail module.
10. Remove the tether from the windshield pillar (1).
11. Remove the roof rail module from the roof.

1. Remove any dirt, grease, or other impurities from the mounting surface.
2. Insert the roof rail module tether to the windshield pillar (1).
3. Install the mounting fasteners to the inflatable restraint roof rail module. Tighten: Tighten the fasteners to 9 N.m (80 lb in).
4. Install the roof rail module harness connector (3).
5. Install the CPA (2) to the roof rail module harness connector.
6. Install the windshield garnish molding. Refer to «Garnish Molding Replacement - Windshield Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
7. Install the center pillar garnish moldings. Refer to «Garnish Molding Replacement - Center Pillar»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
8. Install the side door opening garnish molding. Refer to «Garnish Molding Replacement - Side Door Opening Frame»(/cadillac/srx/i-2003-2009/remont/exteriorinterior-trim/#interior-trim) in Interior Trim.
9. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 2»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
10. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Inflator Module Handling and Scrapping»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .

1. Disable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system)
2. Disconnect the pretensioner electrical connector from the side air bag connector.
3. Disconnect the electrical connector from the seat belt switch.
4. Remove the seat from the vehicle. Refer to «Seat Replacement - Bucket»(/cadillac/srx/i-2003-2009/remont/seats/#seat-system) in Seats.
5. Remove the pretensioner trim cover by pulling out on the cover.
6. Remove the pretensioner fastener (2) and remove the pretensioner (1) from the seat.
7. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to «Pretensioner Handling and Scrapping»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .

1. Install the pretensioner (1) to the seat. Notice that the pretensioner has a tab that fits into the seat in order to insure that the pretensioner is in the proper position.
2. Install the fastener (2) while holding the pretensioner in place. Tighten: Tighten the nut to 42 N.m (31 lb ft).
3. Install the pretensioner trim cover by aligning the tabs. Snap the tabs into place.
4. Install the seat into the vehicle. Refer to «Seat Replacement - Bucket»(/cadillac/srx/i-2003-2009/remont/seats/#seat-system) in Seats.
5. Carefully route the pretensioner pigtail harness and the seat belt wiring harness under the seat.
6. Connect the pretensioner electrical connector to the side air bag connector.
7. Connect the electrical connector to the seat belt switch.
8. Enable the SIR system. Refer to «SIR Disabling and Enabling Zone 7»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) or to «SIR Disabling and Enabling Zone 9»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .

Accident With or Without Air Bag Deployment - Component Inspections

After any collision, inspect the following components as indicated. If you detect any damage, replace the component. If you detect any damage to the mounting points or mounting hardware, repair the component or replace the hardware as needed.

1. The steering column - Perform the steering column accident damage checking procedures. Refer to «Steering Column Accident Damage Inspection»(/cadillac/srx/i-2003-2009/remont/ignition-switchsteering-lock/#steering-wheel-and-steering-column__steering-column-accident-damage-inspection) in Steering Wheel and Column.
2. The I/P knee bolsters and mounting points - Inspect the knee bolsters for bending, twisting, buckling, or any other type of damage.
3. The I/P brackets, braces, etc. - Inspect for bending, twisting, buckling, or any other type of damage.
4. The seat belts - Perform the seat belt operational and functional checks. Refer to «Repairs and Inspections Required After a Collision»(/cadillac/srx/i-2003-2009/remont/restraints-control-systems/#seat-belt-system__repairs-and-inspections-required-after-a) in Seat Belts.
5. The I/P cross car beam - Inspect for bending, twisting, buckling, or any other type of damage.
6. The I/P mounting points and brackets - Inspect for bending, twisting, buckling, or any other type of damage.
7. The seats and seat mounting points - Inspect for bending, twisting, buckling, or any other type of damage.
8. The roof and headliner mounting points.

Accident With Frontal Air Bag Deployment - Component Replacement and Inspections

After a collision involving air bag deployment, replace the following components.

1. Inflatable restraint I/P module
2. Inflatable restraint steering wheel module
3. Inflatable restraint sensing and diagnostic module (SDM)
4. Inflatable restraint front end sensors
5. Inflatable restraint side impact modules, front seat air bags, if deploy
6. Inflatable restraint seat belt pretensioners

Perform additional inspections on the following components.

1. Steering wheel module coil and the coil wiring pigtail - Inspect for melting, scorching, or other damage due to excessive heat.
2. Mounting points or mounting hardware for the I/P module, steering wheel module, SDM, and pretensioners - Inspect for any damage and repair or replace each component as needed.

Accident With Side Air Bag Deployment - Component Replacement and Inspections

After a collision involving side air bag deployment, replace the following components.

1. Inflatable restraint side impact sensors (SIS), Left/Right, on the side of the impact.
2. Inflatable restraint roof rail module, Left/Right, on the side of the impact.
3. Inflatable restraint sensing and diagnostic module (SDM).
4. Inflatable restraint seat belt pretensioner

Perform additional inspections on the following components.

1. Mounting points or mounting hardware for the SIS, and side impact module (LF/RF) on the side of impact - Inspect for any damage and repair or replace each component as needed.
2. Mounting points or mounting hardware for the roof rail module (left/right) on the side of impact - Inspect for any damage and repair or replace each component as needed.
3. Mounting points or mounting hardware for the SDM and seat belt pretensioners - Inspect for any damage and repair or replace each component as needed.

Sensor Replacement Guidelines

The SIR/side air bag sensor replacement policy requires replacing sensors in the area of accident damage. The area of accident damage is defined as the portion of the vehicle which is crushed, bent, or damaged due to a collision. An example of this would be a moderate collision where the front of the vehicle impacts a tree. If the vehicle has an SIR sensor mounted forward of the radiator, it must be replaced.

1. Replace the sensor whether or not the air bags have deployed.
2. Replace the sensor even if it appears to be undamaged.

Sensor damage which is not visible, such as slight bending of the mounting bracket or cuts in the wire insulation, can cause improper operation of the SIR/side air bag sensing system. Do not try to determine whether the sensor is undamaged, replace the sensor. Also, if you follow a Diagnostic Trouble Code (DTC) table and a malfunctioning sensor is indicated, replace the sensor.

Live (Undeployed) Inflator Module

Scheme 12

Take special care when handling or storing a live (undeployed) inflator module. An inflator module deployment produces a rapid generation of gas. This may cause the inflator module, or an object in front of the inflator module, to project through the air in the event of an unlikely deployment.

Dual Stage Inflator Module

Dual stage inflator modules have two deployment stages. If stage 1 was used to deploy a dual stage inflator module, stage 2 may still be active. Therefore, a deployed dual stage inflator module must be treated as an active module. If disposal of a deployed or undeployed dual stage module is required both deployment loops must be energized to deploy the air bag.

Scrapping Procedure

During the course of a vehicle's useful life, certain situations may arise which will require the disposal of a live (undeployed) inflator module. Do not dispose a live (undeployed) inflator module through normal disposal channels until the inflator module has been deployed. The following information covers the proper procedures for the disposing of a live (undeployed) inflator module.

Do not deploy the inflator module in the following situations

1. After replacement of an inflator module under warranty. The inflator module may need to be returned undeployed to the manufacturer.
2. If the vehicle is the subject of a Product Liability report related to the SIR system and is subject to a Preliminary Investigation (GM-1241). Do not alter the SIR system in any manner.
3. If the vehicle is involved in a campaign affecting the inflator modules. Follow the instructions in the Campaign Service Bulletin for proper SIR handling procedures.

Deployment Procedures

The inflator module can be deployed inside or outside of the vehicle. The method used depends upon the final disposition of the vehicle. Review the following procedures in order to determine which will work best in a given situation

Deployment Outside Vehicle (Steering Wheel Module, I/P Module, Roof Rail Module, and Side Impact Module)

Deploy the inflator module outside of the vehicle when the vehicle will be returned to service. Situations that require deployment outside of the vehicle include the following

1. Using the SIR diagnostics, you determine that the inflator module is malfunctioning.
2. The inflator module is cosmetically damaged (scratched or ripped).
3. The inflator module pigtail (if equipped) is damaged.
4. The inflator module connector is damaged.
5. The inflator module connector terminals are damaged.

Deployment and disposal of a malfunctioning inflator module is subject to any required retention period.

Tools Required

1. J 38826 SIR Deployment Harness. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
2. J 39401-B SIR Deployment Fixture. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
3. J 38826-30A Roof rail module adapter
4. J 38826-30A Side impact module adapter
5. J 38826-75 Steering wheel module adapter (dual stage air bags)
6. J 38826-80 I/P module adapter (dual stage air bags)

1. Turn OFF the ignition.
2. Remove the ignition key.
3. Put on safety glasses.
4. Remove the inflator module. Refer to the following: If you are removing the steering wheel module, refer to «Inflatable Restraint Steering Wheel Module Replacement»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) . If you are removing the I/P module, refer to «Inflatable Restraint Instrument Panel Module Replacement»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) . If you are removing a side impact module, refer to «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) . If you are removing a roof rail module, refer to «Inflatable Restraint Roof Rail Module Replacement - Left»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) and/or «Inflatable Restraint Roof Rail Module Replacement - Right»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
5. Place the inflator module with the vinyl trim cover facing up and away from the surface on a work bench.
6. Clear a space on the ground about 1.85 m (6 ft) in diameter for deployment of the inflator module or deployment fixture. If possible, use a paved, outdoor location free of activity. Otherwise, use a space free of activity on the shop floor. Make sure you have sufficient ventilation.
7. Make sure no loose or flammable objects are in the area.
8. If you have a steering wheel inflator module, place the inflator module in the center of the space.
9. If you have an I/P inflator module, refer to the following instructions: Place the J 39401-B SIR deployment fixture (2) in the center of the cleared area. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Fill the deployment fixture with water or sand. Using the proper nuts and bolts, mount the I/P module (1) to the deployment fixture (2), with the vinyl trim facing up. Securely tighten all fasteners that hold the I/P module (1) to the deployment fixture (2).
10. If you have a side impact module, refer to the following instructions: Place the J 39401-B SIR deployment fixture (3) in the center of the cleared area. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Fill the deployment fixture with water or sand. Using the proper nuts and mount the side impact module (1) to the deployment fixture (3), with the vinyl trim facing up. Adjust and secure the fixture arms (4) to the deployment fixture (3). Securely tighten all fasteners that hold the side impact module (1) to the deployment fixture (3).
11. If you have a roof rail module, refer to the following instructions: Place the J 39401-B SIR deployment fixture (3) in the center of the cleared area. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Fill the deployment fixture with water or sand. Using the proper nuts (2) and mount the roof rail module (1) to the deployment fixture (3), with the vinyl face up. Adjust and secure the fixture arms (4) to the deployment fixture (3). Securely tighten all fasteners that hold the side impact module (1) to the deployment fixture (3).
12. Inspect the J 38826 and the appropriate pigtail adapter for damage. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Replace as needed.
13. Short the 2 SIR deployment harness leads (1) together using one banana plug seated into the other.
14. Connect the appropriate pigtail adapter (2) to the SIR deployment harness (1).
15. Extend the SIR deployment harness and adapter to full length from the deployment fixture.
16. Connect the inflator module to the adapter (2) on the SIR deployment harness (1).
17. Place a 12 V minimum/2 A minimum power source (i.e., vehicle battery) near the shorted end of the harness.
18. Clear the area of people.
19. Separate the 2 banana plugs on the SIR deployment harness.
20. Connect the SIR deployment harness wires to the power source. Inflator module deployment will occur when contact is made.
21. Disconnect the SIR deployment harness from the power source after the inflator module deploys.
22. If the inflator module did not deploy, disconnect the adapter and discontinue the procedure. Contact the Technical Assistance Group. Otherwise, proceed to the following steps.
23. Seat one banana plug into the other in order to short the deployment harness leads.
24. Put on a pair of shop gloves.
25. Disconnect the pigtail adapter from the inflator module as soon as possible.
26. Inspect the pigtail adapter and the SIR deployment harness. Replace as needed.
27. Dispose of the deployed inflator module through normal refuse channels.
28. Wash hands with a mild soap.

Deployment Inside Vehicle (Vehicle Scrapping Procedure)

Deploy the inflator modules inside of the vehicle when destroying the vehicle or when salvaging the vehicle for parts. This includes but is not limited to the following situations

1. The vehicle has completed its useful life.
2. Irreparable damage occurs to the vehicle in a non-deployment type accident.
3. Irreparable damage occurs to the vehicle during a theft.
4. The vehicle is being salvaged for parts to be used on a vehicle with a different VIN as opposed to rebuilding as the same VIN.

1. Turn the ignition switch to the OFF position.
2. Remove the ignition key.
3. Put on safety glasses.
4. Remove all loose objects from the front seats.
5. Disable the SIR system. Refer to «SIR Disabling and Enabling Zones»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling-zones) .
6. Disconnect the steering wheel module yellow connector (1) from vehicle harness yellow connector (3).
7. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
8. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
9. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. Use these wires to fabricate the driver deployment harness.
10. Strip 13 mm (0.5 in) of insulation from both ends of the wires cut in the previous step.
11. Twist together one end from each of the wires in order to short the wires. Deployment wires shall remain shorted, and not connected to a power source until you are ready to deploy the inflator module.
12. Twist together two connector wire leads (the high circuits from both stages of the steering wheel module) to one sets of deployment wires. Refer to «SIR Connector End Views»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__sir-connector-end-views) in order to determine the correct circuits.
13. Inspect that the 3 wire connection is secure.
14. Bend flat the twisted connection.
15. Secure and insulate the 3 wire connection to deployment harness using electrical tape.
16. Twist together two connector wire leads (the low circuits from both stages of the steering wheel module) to one sets of deployment wires. Refer to «SIR Connector End Views»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__sir-connector-end-views) in order to determine the correct circuits.
17. Inspect that the 3 wire connection is secure.
18. Bend flat the twisted connection.
19. Secure and insulate the 3 wire connection to deployment harness using electrical tape.
20. Connect the deployment harness to the steering wheel module in-line connector.
21. Route the deployment harness out of the driver side of the vehicle.
22. Disconnect the driver side air bag/pretensioner yellow connector (1) from the vehicle wiring harness located under the front of driver seat.
23. Cut the four SIR wires (2 for side air bag and 2 for pretensioner) leading to the yellow harness connector from the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
24. Strip 13 mm (0.5 in) of insulation from all four SIR wires connector leads (2 for side air bag and 2 for pretensioner).
25. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. Use these wires to fabricate the deployment harness.
26. Strip 13 mm (0.5 in) of insulation from both ends of the wires cut in the previous step.
27. Twist together one end from each of the wires in order to short the wires. Deployment wires shall remain shorted, and not connected to a power source until you are ready to deploy the side air bag module and pretensioner.
28. Twist together two connector wire leads (the high circuits from side air bag and pretensioner ) to one sets of deployment wires. Refer to «SIR Connector End Views»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__sir-connector-end-views) in order to determine the correct circuits.
29. Inspect that the 3 wire connection is secure.
30. Bend flat the twisted connection.
31. Secure and insulate the 3 wire connection to deployment harness using electrical tape.
32. Twist together two connector wire leads (the low circuits from side air bag and pretensioner ) to one sets of deployment wires. Refer to «SIR Connector End Views»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__sir-connector-end-views) in order to determine the correct circuits.
33. Inspect that the 3 wire connection is secure.
34. Bend flat the twisted connection.
35. Secure and insulate the 3 wire connection to deployment harness using electrical tape.
36. Connect the deployment harness to the driver side air bag/pretensioner yellow connector.
37. Route the deployment harness out of the driver side of the vehicle.
38. Disconnect the vehicle yellow harness connector (2) from the left/driver roof rail module (1).
39. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
40. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
41. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. These wires will be used to fabricate the roof rail air bag deployment harness.
42. Strip 13 mm (0.5 in) of insulation from both ends of the wires cut in the previous step.
43. Twist together one end from each of the wires in order to short the wires.
44. Twist together one connector wire lead to one deployment wire.
45. Bend flat the twisted connection.
46. Secure and insulate the connection using electrical tape.
47. Twist together, bend, and tape the remaining connector wire lead to the remaining deployment wire.
48. Connect the deployment harness to the roof rail module yellow connector.
49. Route the deployment harness out of the driver side of the vehicle.
50. Disconnect the I/P module yellow harness connector (1) from the vehicle harness connector (2).
51. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
52. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
53. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. These wires will be used to fabricate the passenger deployment harness.
54. Strip 13 mm (0.5 in) of insulation from both ends of the wires cut in the previous step.
55. Twist together one end from each of the wires in order to short the wires.
56. Twist together two connector wire leads (the high circuits from both stages of the I/P module) to one sets of deployment wires. Refer to «SIR Connector End Views»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__sir-connector-end-views) in order to determine the correct circuits.
57. Inspect that the 3 wire connection is secure.
58. Bend flat the twisted connection.
59. Secure and insulate the 3 wire connection to deployment harness using electrical tape.
60. Twist together 2 connector wire leads (the low circuits from both stages of the I/P module) to one sets of deployment wires. Refer to «SIR Connector End Views»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__sir-connector-end-views) in order to determine the correct circuits.
61. Inspect that the 3 wire connection is secure.
62. Bend flat the twisted connection.
63. Secure and insulate the 3 wire connection to deployment harness using electrical tape.
64. Connect the deployment harness to the I/P module in-line connector.
65. Route the deployment harness out of the passenger side of the vehicle.
66. Disconnect the passenger side air bag/pretensioner yellow connector (1) from the vehicle wiring harness located under the front of driver seat.
67. Cut the four SIR wires (2 for side air bag and 2 for pretensioner) leading to the yellow harness connector from the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
68. Strip 13 mm (0.5 in) of insulation from all four SIR wires connector leads (2 for side air bag and 2 for pretensioner).
69. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. Use these wires to fabricate the deployment harness.
70. Strip 13 mm (0.5 in) of insulation from both ends of the wires cut in the previous step.
71. Twist together one end from each of the wires in order to short the wires. Deployment wires shall remain shorted, and not connected to a power source until you are ready to deploy the side air bag module and pretensioner.
72. Twist together two connector wire leads (the high circuits from side air bag and pretensioner) to one sets of deployment wires. Refer to «SIR Connector End Views»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__sir-connector-end-views) in order to determine the correct circuits.
73. Inspect that the 3 wire connection is secure.
74. Bend flat the twisted connection.
75. Secure and insulate the 3 wire connection to deployment harness using electrical tape.
76. Twist together two connector wire leads (the low circuits from side air bag and pretensioner) to one sets of deployment wires. Refer to «SIR Connector End Views»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__sir-connector-end-views) in order to determine the correct circuits.
77. Inspect that the 3 wire connection is secure.
78. Bend flat the twisted connection.
79. Secure and insulate the 3 wire connection to deployment harness using electrical tape.
80. Connect the deployment harness to the passenger side air bag/pretensioner yellow connector.
81. Route the deployment harness out of the passenger side of the vehicle.
82. Disconnect the vehicle yellow harness connector (3) from the right/passenger roof rail air bag (1).
83. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
84. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
85. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gage) or thicker multi-strand wire. These wires will be used to fabricate the roof rail air bag deployment harness.
86. Strip 13 mm (0.5 in) of insulation from both ends of the wires cut in the previous step.
87. Twist together one end from each of the wires in order to short the wires.
88. Twist together one connector wire lead to one deployment wire.
89. Bend flat the twisted connection.
90. Secure and insulate the connection using electrical tape.
91. Twist together, bend, and tape the remaining connector wire lead to the remaining deployment wire.
92. Connect the deployment harness to the roof rail module yellow connector.
93. Route the deployment harness out of the passenger side of the vehicle.
94. Completely cover the windshield and front door window openings with a drop cloth.
95. Stretch out all of the deployment harness wires on the right side of the vehicle to their full length.
96. Deploy each deployment loop one at a time.
97. Place a power source, 12 V minimum/2 A minimum (i.e., a vehicle battery) near the shorted end of the harnesses.
98. Separate the one set of wires and touch the wires ends to the power source in order to deploy the inflator modules, doing one module at a time.
99. Disconnect the deployment harness from the power source and twist the wire ends together.
100. Continue the same process with the remaining deployment harnesses that are available.
101. Stretch out all of the deployment harness wires on the left side of the vehicle to their full length.
102. Deploy each deployment loop one at a time.
103. Place a power source, 12 V minimum/2 A minimum (i.e., a vehicle battery) near the shorted end of the harnesses.
104. Separate the one set of wires and touch the wires ends to the power source in order to deploy the inflator modules, doing one module at a time.
105. Disconnect the deployment harness from the power source and twist the wire ends together.
106. Continue the same process with the remaining deployment harnesses that are available.
107. Remove the drop cloth from the vehicle.
108. Disconnect all harnesses from the vehicle.
109. Discard the harnesses.
110. Scrap the vehicle in the same manner as a non-SIR equipped vehicle.
111. If one or all of the inflator modules did not deploy, perform the following steps to remove the undeployed module(s) from the vehicle: «Inflatable Restraint Steering Wheel Module Replacement»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) «Inflatable Restraint Instrument Panel Module Replacement»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) «Inflatable Restraint Roof Rail Module Replacement - Left»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) «Inflatable Restraint Roof Rail Module Replacement - Right»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system)

Scheme 13

During the course of a vehicle's useful life, certain situations may arise which will necessitate the disposal of a live (undeployed) pretensioner. The following information covers the proper procedures for the disposing of a live (undeployed) pretensioner. Deploy the pretensioner before disposal. Do not dispose of a live (undeployed) pretensioner through normal disposal channels until the pretensioner has been deployed. The following information covers the proper procedures for the disposing of a live (undeployed) pretensioner.

1. After replacement of a pretensioner under warranty. The pretensioner may need to be returned undeployed to the original manufacturer of pretensioner.
2. If the vehicle is the subject of a Product Liability report related to the SIR system and is subject to a Preliminary Investigation (GM-1241). Do not alter the SIR system in any manner.
3. If the vehicle is involved in a campaign affecting the pretensioners. Follow the instructions in the Campaign Service Bulletin for proper SIR handling procedures.

The pretensioner can be deployed inside or outside of the vehicle. The method used depends upon the final disposition of the vehicle. Review the following procedures in order to determine which will work best in a given situation.

Deployment Inside the Vehicle

Refer to Inflator Module Handling and Scrapping for deploying the pretensioner inside vehicle under Vehicle Scrapping Procedure.

Deployment Outside Vehicle for Seat Belt Pretensioners

Deploy the seat belt pretensioners outside of the vehicle when the vehicle will be returned to service. Situations that require deployment outside of the vehicle include the following

1. Using the SIR diagnostics, you determine that the seat belt pretensioner is malfunctioning.
2. The pretensioner pigtail (if equipped) is damaged.
3. The pretensioner connector is damaged.
4. The pretensioner connector terminal is damaged.

Deployment and disposal of a malfunctioning seat belt pretensioner is subject to any required retention period.

Tools Required

1. J 39401-B SIR Deployment Fixture. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
2. J 38826 SIR Deployment Harness. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
3. J 38826-25 for seat belt pretensioner module adapter

1. Turn the ignition switch to the OFF position.
2. Remove the ignition key.
3. Put on safety glasses.
4. Remove the seat belt pretensioner from the vehicle. Refer to «Seat Belt Buckle Pretensioner Replacement»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system) .
5. When carrying a pretensioner to the deployment area keep the open end of pretensioner pointed away from the body.
6. Clear a space on the ground about 1.85 M (6 ft) in diameter for deployment of the pretensioner. If possible, use a paved, outdoor location free of activity. Otherwise, use a space free of activity on the shop floor. Make sure you have sufficient ventilation.
7. Make sure no loose or flammable objects are in the area.
8. Place the J 39401-B SIR Deployment Fixture in the center of the cleared area. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
9. Fill the fixture plastic reservoir with water or sand.
10. Mount the module (1) in the SIR deployment fixture (3) with the open end facing up using the following mounting method. Adjust and secure the J 39401-B arms (4) to the deployment fixture (3). To mount, use the proper size bolt (2) and nut (5) with washers in order to secure the pretensioner (1) to the deployment fixture brackets (4). Securely tighten all fasteners prior to deployment.
11. Inspect the J 38826 SIR Deployment Harness and the appropriate pigtail adapter for damage. See «Special Tools»(/cadillac/srx/i-2003-2009/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Replace as needed.
12. Short the 2 SIR deployment harness (1) leads together using one banana plug seated into the other.
13. Connect the appropriate pigtail adapter (2) to the SIR deployment harness (1).
14. Extend the SIR deployment harness and adapter to full length from the deployment fixture.
15. Connect the pretensioner (1) to the adapter (2) on the deployment harness (3).
16. Clear the area of people.
17. Separate the 2 banana plugs on the SIR deployment harness.
18. Place a 12 V minimum/2 A minimum power source (i.e., vehicle battery) near the shorted end of the harness.
19. Connect the SIR deployment harness wires to the power source. Pretensioner deployment will occur when contact is made.
20. Disconnect the SIR deployment harness from the power source after the pretensioner deploys.
21. Seat one banana plug into the other in order to short the deployment harness leads.
22. If the pretensioner did not deploy, disconnect the adapter and discontinue the procedure. Contact the Technical Assistance Group. Otherwise, proceed to the following steps.
23. Put on a pair of shop gloves.
24. Disconnect the pigtail adapter from the pretensioner as soon as possible.
25. Inspect the pigtail adapter and the SIR deployment harness. Replace as needed.
26. Dispose of the deployed pretensioner through normal refuse channels.
27. Wash hands with a mild soap.

Scheme 14

The supplemental inflatable restraint (SIR) system supplements the protection offered by the occupant's seat belt system (2). The SIR system may contain several inflator modules located throughout the vehicle, i.e. steering wheel module (1), instrument panel (I/P) module (1), or side impact modules. In addition to inflator modules, the vehicle may contain seat belt pretensioners that tighten the seat belt in the event of a collision, thus reducing the distance between the occupant and the seat belt when an inflator module is deployed. Each inflator module has a deployment loop that is controlled by the sensing and diagnostic module (SDM) mounted inside the vehicle. The SDM determines the severity of a collision with the assistance of various sensor inputs located at strategic points on the vehicle. When the SDM detects a collision of sufficient force it will process the information provided by the sensors to further support air bag deployment. The SDM performs continuous diagnostic monitoring of the SIR system electrical components. Upon detection of a circuit malfunction, the SDM will set a DTC and inform the driver by turning the AIR BAG indicator ON. The steering column (1) and knee bolsters (3) are designed to absorb energy and compress during frontal collisions in order to limit leg movement and decrease the chance of injury to the driver and passenger. After an Air Bag deployment, the SDM will send out a post-air message to the rear integration module (RIM). The RIM will unlock the doors and turn ON the interior lights 15 seconds after receipt of this message.

Frontal SIR System Description

The frontal SIR system consists of the following components

1. AIR BAG indicator located in the instrument panel cluster (IPC)
2. Driver and passenger knee bolsters
3. Inflatable restraint front end sensors
4. Inflatable restraint instrument panel (I/P) module
5. Inflatable restraint sensing and diagnostic module (SDM)
6. Inflatable restraint steering wheel module
7. Inflatable restraint steering wheel module coil
8. Inflatable restraint seat belt pretensioners
9. Inflatable restraint wiring harnesses
10. Steering wheel and column

A frontal collision of sufficient force up to 30 degrees off the longitudinal centerline of the vehicle will deploy the frontal air bags. The SDM contains a sensing device that converts vehicle velocity changes to an electrical signal. In the event of a frontal collision, the SDM receives a signal from the electronic frontal sensor, which assists the SDM in determining the severity of the collision. The SDM compares these signals to a value stored in memory. When the generated signals exceed the stored value, the SDM will cause current to flow through the frontal deployment loops simultaneously deploying the frontal air bags. The SDM, I/P module, steering wheel module, steering wheel module coil and the connecting wires makeup the frontal deployment loops. The SDM continuously monitors the deployment loops for malfunctions and turns the AIR BAG indicator ON if a fault is detected.

Inflatable Restraint Sensing and Diagnostic Module (SDM)

The sensing and diagnostic module (SDM) is a microprocessor and the control center for the SIR system. The SDM contains internal sensors along with several external sensors, if equipped, mounted at strategic locations on the vehicle. In the event of a collision, the SDM compares the signals from the internal and external sensors to a value stored in memory. When the generated signals exceed the stored value, the SDM will cause current to flow through the appropriate deployment loops to deploy the air bags. The SDM records the SIR system status when a deployment occurs and turns the AIR BAG indicator located in the instrument panel cluster (IPC) ON. The SDM performs continuous diagnostic monitoring of the SIR system electrical components and circuitry when the ignition is turned ON. If the SDM detects a malfunction, a DTC will be stored and the SDM will command the AIR BAG indicator ON, notifying the driver that a malfunction exist. In the event that ignition positive voltage is lost during a collision, the SDM maintains a 23-volt loop reserve (23 VLR) for deployment of the air bags. It is important when disabling the SIR system for servicing or rescue operations to allow the 23 VLR to dissipate, which could take up to 1 minute.

AIR BAG Indicator

The AIR BAG indicator, located in the instrument panel cluster (IPC) is used to notify the driver of SIR system malfunctions and to verify that the sensing diagnostic module (SDM) is communicating with the IPC. When the ignition is turned ON, the SDM is supplied with ignition positive voltage. The SDM requests the IPC to flash the AIR BAG indicator seven times. While flashing the indicator, the SDM conducts test on all SIR system components and circuits. If no malfunctions are detected the SDM will communicate with the IPC through the class 2 serial data circuit and command the AIR BAG indicator OFF. The SDM provides continuous monitoring of the air bag circuits by conducting a sequence of checks. If a malfunction is detected the SDM will store a diagnostic trouble code (DTC) and command the IPC to turn the AIR BAG indicator ON via class 2 serial data and a SERVICE AIR BAG message will be display on the driver information center (DIC). The presence of a SIR system malfunction could result in non-deployment of the air bags or deployment in conditions less severe than intended. The AIR BAG indicator and the SERVICE AIR BAG message on the DIC will remain ON until the malfunction has been repaired.

Dual Stage Inflator Modules

Dual stage inflator modules contain a housing, inflatable air bag, 2 initiating devices, canister of gas generating material and, in some cases, stored compressed gas. The 2 initiators are part of the frontal deployment loop. The function of the frontal deployment loops are to supply current through the steering wheel and instrument panel (I/P) inflator modules to deploy the air bags. The inflator modules have 2 stages of deployment, which varies the amount of restraint to the occupant according to the collision severity. For moderate frontal collisions the inflator modules deploy at less than full deployment (low deployment) which consists of stage 1 of the inflator module. For more severe frontal collisions a full deployment is initiated which consists of stage 1 and stage 2 of the inflator module. The current passing through the initiators ignites the material in the canister producing a rapid generation of gas and is some cases, the release of compressed gas. The gas produced from this reaction rapidly inflates the air bag. Once the air bag is inflated it quickly deflates through the air bag vent holes and/or the bag fabric.

Each dual stage inflator modules is equipped with a shorting bar located in the connector(s) of the module. The shorting bar shorts the inflator module deployment loop circuitry to prevent unwanted deployment of the air bag when it is disconnected.

Inflatable Restraint Steering Wheel Module Coil

The steering wheel module coil is attached to the steering column and is located under the steering wheel. The steering wheel module coil consists of two or more current-carrying coils. The coils allow the rotation of the steering wheel while maintaining continuous electrical contact between the driver deployment loop and the steering wheel module. Two or four, if equipped with dual stage air bags, coil wires are used for the steering wheel module deployment loop. Additional coil wires are used for accessories attached to the steering wheel depending on the vehicle model. The steering wheel module coil connector is located near the base of the steering column. The connector contains a shorting bar that shorts the steering wheel module coil deployment loop circuitry to prevent unwanted deployment of the air bag when servicing the inflator module.

Inflatable Restraint Front End Sensor

The front end sensors are equipped on vehicles to supplement the SIR system performance. The front end sensor is an electronic sensor and is not part of the deployment loops, but instead provides an input to the sensing and diagnostic module (SDM). The front end sensor can assist in determining the severity of some frontal collisions. The SDM contains a microprocessor which performs calculations using the measured accelerations and compares these calculations to a value stored in memory. When the generated calculations exceed the stored value, the SDM will cause current to flow through the frontal deployment loops deploying the frontal air bags.

Inflatable Restraint Seat Belt Pretensioner

The seat belt pretensioner modules contain a housing, an initiating device, canister of gas generating material. The initiator is part of the seat belt pretensioner deployment loop. When the vehicle is involved in a collision of sufficient force, the sensing and diagnostic module (SDM) will cause current to flow through the deployment loops to the initiator. Current passing through the initiator ignites the material in the canister producing a rapid generation of gas and the release of compressed gas, if present. The gas produced from this reaction rapidly shortens the seat belt buckle height.

Each seat belt pretensioner is equipped with a shorting bar located on the connector of the pretensioner. The shorting bar shorts the seat belt pretensioner deployment loop circuitry to prevent unwanted deployment of the pretensioner when servicing the seat belt pretensioner.

Inflatable Restraint Wiring Harness

The inflatable restraint wiring harnesses connect the inflators modules, sensing and diagnostic module (SDM), deployment loops, and class 2 serial data together using weather pack connectors. SIR system connectors are yellow in color for easy identification. When repairing the SIR wiring harnesses follow the proper testing and wiring repair procedures listed in this manual.

Steering Column and Wheel

The steering wheel and columns are designed to absorb energy when driver contact is made with the steering wheel or inflated air bag. In a frontal collision the driver may come in contact with the steering wheel directly or load the steering wheel and column through the inflated air bag. When the driver applies load to the air bag or the steering wheel the column will compress downward absorbing some of the impact, helping to reduce bodily injuries to the driver. The steering wheel and column must be inspected for damages after a collision.

Knee Bolster

The knee bolsters are designed to help restrain the lower torso of front seat occupants by absorbing the energy through the front seat occupant's upper legs. In a frontal collision the front seat occupant legs may come in contact with the knee bolsters. The knee bolsters are designed to crush or deform, absorbing some of the impact, which helps to reduce bodily injuries. The driver and passenger knee bolsters are located in the lower part of the instrument panel and must be inspected for damages after a collision.

Side SIR System Description

The side SIR system consists of the following components

1. AIR BAG indicator located in the instrument panel cluster (IPC)
2. Inflatable restraint sensing and diagnostic module (SDM)
3. Inflatable restraint side impact modules (LF/RF)
4. Inflatable restraint side impact sensors (SIS) (left/right)
5. Inflatable restraint vehicle rollover sensor
6. Inflatable restraint roof rail modules (left/right)
7. Inflatable restraint wiring harnesses

The side impact modules are located in the outside portion of the front seat backs and the roof rail modules are located under the headliner extending from the front windshield pillar to the rear window pillar. The side impact modules and the roof rail modules contain a housing, inflatable air bag, initiating device, and a canister of gas generating material. The initiator is part of the side impact and roof rail module deployment loop. When a side impact of sufficient force occurs the SIS detects the impact and sends a signal to the SDM. The SDM compares the signal received from the SIS to a value stored in memory. When the generated signal exceeds the stored value, the SDM will cause current to flow through the side deployment loop deploying the side and the roof rail air bags. The SDM, side impact modules, roof rail modules and the connecting wires makeup the side deployment loops. The SDM continuously monitors the deployment loops for malfunctions and turns the AIR BAG indicator ON if a fault is present.

Each side impact and roof rail module is equipped with a shorting bar located on the connector of the module. The shorting bar shorts the side impact and roof rail modules deployment loop circuitry to prevent unwanted deployment of the air bag when servicing the inflator module.

Inflatable Restraint Side Impact Sensor (SIS)

The side impact sensor (SIS) contains a sensing device which monitors vehicle acceleration and velocity changes to detect side collisions that are severe enough to warrant air bag deployment. The SIS is not part of the deployment loop, but instead provides an input to the sensing and diagnostic module (SDM). The SDM contains a microprocessor that performs calculations using the measured accelerations and compares these calculations to a value stored in memory. When the generated calculations exceed the stored value, the SDM will cause current to flow through the deployment loops deploying the side air bags.

Inflatable Restraint Vehicle Rollover Sensor

The vehicle rollover sensor is used to supplement the side Supplemental Inflatable Restraint (SIR) System. The sensing and diagnostic module (SDM) uses the input from the vehicle rollover sensor to assist in determining the severity of a vehicle rollover or near rollover condition. If the SDM determines a deployment is warranted, the SDM will cause current to flow through the deployment loops deploying the inflatable restraint roof rail modules.

Special Tools

Special Tools Illustration Tool Number/Description J 38715-A Driver/Passenger SIR Load Tool J 38826 SIR Deployment Harness J 39401-B SIR Deployment Fixture J 44298 Driver Air Bag Removal Tool

See also:
• Diagnostic System Check - Vehicle
• Testing for Intermittent Conditions and Poor Connections
• Connector Repairs
• Control Module References
• Circuit Testing
• Wiring Repairs
• Diagnostic Repair Verification
• Checking Aftermarket Accessories
• Carpet Retainer Replacement - Rear
• Closeout/Insulator Panel Replacement - Left
• SIR Caution
• Fastener Notice
• Body Control Module (BCM) Programming/RPO Configuration (DIM)
• SIR Inflator Module Handling and Storage Caution
• Steering Column Trim Covers Replacement
• Inflatable Restraint Steering Wheel Module Coil Centering
• Seat Replacement - Bucket
• Steering Column Accident Damage Inspection
• Repairs and Inspections Required After a Collision
• SIR Inflator Module Disposal Caution
• SIR Deployed Inflator Modules Are Hot Caution
• SIR Inflatable Module Deployment Outside Vehicle Caution
• SIR Disabling and Enabling Zones
• DTC B0012, B0013, B0014, B0016, B0017, or B0018
• SIR Connector End Views
• Special Tools
• SIR Service Precautions
• SIR Zone Identification Views
• Fastener Tightening Specifications