Supplemental Inflatable Restraint System Buick Enclave I

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

SIR Identification Views

The SIR 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 for a given service procedure. Refer to SIR Disabling and Enabling .

Scheme 4

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

Circuit/System Description

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 driver steering wheel air bag. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage.

There are 2 shorting bars used within the driver steering wheel module coil connector which will short together both driver steering wheel air bag stage 1 high circuit and driver steering wheel air bag stage 1 low circuit and both driver steering wheel air bag stage 2 high circuit and driver steering wheel air bag stage 2 low circuit when the connector is disconnected. This will help to prevent unwanted deployment of the air bag during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0012 01 Stage 1 or B0013 01 Stage 2

The driver steering wheel air bag high and/or low circuit is short to voltage for 120 milliseconds.

B0012 02 Stage 1 or B0013 02 Stage 2

The driver steering wheel air bag high and/or low circuit is short to ground for 120 milliseconds.

B0012 04 Stage 1 or B0013 04 Stage 2

The driver steering wheel air bag high and/or low circuit is open for 120 milliseconds.

B0012 0D Stage 1 or B0013 0D Stage 2

The driver steering wheel air bag deployment loop resistance is greater than 5.1 ohms for 120 milliseconds.

B0012 0E Stage 1 or B0013 0E Stage 2

The driver steering wheel air bag deployment loop resistance is less than 1.3 ohms for 120 milliseconds.

Action Taken When the DTC Sets

1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator ON.
2. The SIR system is disabled and no deployments are allowed.

Conditions for Clearing the DTC

1. The condition for setting the DTC no longer exists.
2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

J 38715-A Driver and Passenger SIR Load Tool

Circuit/System Testing

1. Verify that the driver steering wheel air bag connector and the connector position assurance (CPA) are engaged. If the above condition is found, make the appropriate repair.
2. Ignition OFF, disconnect the appropriate driver steering wheel air bag harness connector.
3. With the appropriate load tool adaptor, connect J 38715-A driver and passenger SIR load tool.
4. Ignition ON, verify DTC is set as current. If the DTC is not set or is set as history, cycle ignition OFF, disconnect the adapter and J 38715-A driver and passenger SIR load tool , reconnect the harness connector at the driver steering wheel air bag, and cycle the ignition ON. If the DTC resets after reconnecting the air bag, replace the driver steering wheel air bag.
5. Ignition OFF, disconnect J 38715-A driver and passenger SIR load tool and adaptor.
6. Disconnect the harness connector at the driver steering wheel module coil.
7. Ignition ON, test for less than 1 volt between the appropriate high control circuit listed below and ground: Steering wheel module coil connector Stage 1 terminal 1 X3 Steering wheel module coil connector Stage 2 terminal 3 X3 If not within the specified range, test the high control circuit for a short to voltage.
8. Test for less than 1 volt between the appropriate low control circuit listed below and ground: Steering wheel module coil connector Stage 1 terminal 2 X3 Steering wheel module coil connector Stage 2 terminal 4 X3 If not within the specified range, test the low control circuit for a short to voltage.
9. Ignition OFF, test for infinite resistance between the appropriate high control circuit listed below and ground: Steering wheel module coil connector Stage 1 terminal 1 X3 Steering wheel module coil connector Stage 2 terminal 3 X3 If not within the specified range, test the high control circuit for a short to ground.
10. Test for infinite resistance between the appropriate low control circuit listed below and ground: Steering wheel module coil connector Stage 1 terminal 2 X3 Steering wheel module coil connector Stage 2 terminal 4 X3 If not within the specified range, test the low control circuit for a short to ground.
11. Test for less then 1 ohm between the appropriate high control circuit terminals listed below: Steering wheel module coil connector Stage 1 terminal 1 X3 and SDM terminal 4 X1 Steering wheel module coil connector Stage 2 terminal 3 X3 and SDM terminal 1 X1 If not within the specified range, test the high control circuit for an open/high resistance.
12. Test for less then 1 ohm between the appropriate low control circuit terminals listed below: Steering wheel module coil connector Stage 1 terminal 2 X3 and SDM terminal 3 X1 Steering wheel module coil connector Stage 2 terminal 4 X3 and SDM terminal 2 X1 If not within the specified range, test the low control circuit for an open/high resistance. If circuits tests normal replace the steering wheel module coil.
13. If all circuits test normal, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Steering Wheel Inflatable Restraint Module Replacement»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Steering Wheel Airbag Coil Replacement»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
3. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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 an air bag. There are 2 shorting bars used within the module connector which will short together both high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the air bag during servicing.

Ignition voltage is between 9-16 V.

B0014 01, B0015 01, B0016 01, B0019 01, B0020 01, B0021 01, B0022 01, B0023 01

The air bag or pretensioner high and/or low circuit is shorted to voltage for 120 milliseconds.

B0014 02, B0015 02, B0016 02, B0019 02, B0020 02, B0021 02, B0022 02, B0023 02

The air bag or pretensioner high and/or low circuit is shorted to ground for 120 milliseconds.

B0014 04, B0015 04, B0016 04, B0019 04, B0020 04, B0021 04, B0022 04, B0023 04

The air bag or pretensioner high and/or low circuit is open for 120 milliseconds.

B0014 0D, B0015 0D, B0016 0D, B0019 0D, B0020 0D, B0021 0D, B0022 0D, B0023 0D

The air bag or pretensioner deployment loop resistance is greater than 3.9 ohms for 120 milliseconds.

B0014 0E, B0015 0E, B0016 0E, B0019 0E, B0020 0E, B0021 0E, B0022 0E, B0023 0E

The air bag or pretensioner deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
2. The SDM will store a DTC, however if an event occurs the system will still attempt deployments.

1. The condition for setting the DTC no longer exists.
2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

Each air bag requires a specific adapter to connect the load tool to the SIR system.

J-38715-A Driver and Passenger SIR Load Tool

Note. Refer to SIR Service Precautions . When removing connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector: Pretensioner Air Bag SDM Pretensioner wiring harness connector Air Bag wiring harness connector SDM wiring harness connector

1. Verify that the appropriate air bag or pretensioner connector and CPA are engaged. If the connector and CPA are not engaged, make the appropriate repair.
2. Ignition OFF, disconnect the harness connector at the appropriate air bag or pretensioner.
3. Install a 3A fused jumper between the J-38715-A driver and passenger SIR load tool and the harness connector of the appropriate air bag or pretensioner.
4. Ignition ON, with a scan tool, verify the appropriate DTC is set as current. If the DTC is not set or is set as history, cycle ignition OFF, disconnect the adapter and J-38715-A driver and passenger SIR load tool , reconnect the harness connector at the air bag or pretensioner, and cycle the ignition ON. If the DTC resets after reconnecting the air bag or pretensioner, replace the air bag or pretensioner.
5. Ignition OFF, disconnect J-38715-A driver and passenger SIR load tool and the appropriate adaptor.
6. Disconnect the harness connector at the SDM.
7. Ignition ON, test for less than 1 V between the appropriate high control circuit listed below and ground: Passenger instrument panel air bag Stage 1 terminal 1 Passenger instrument panel air bag Stage 2 terminal 4 Left roof rail air bag terminal 1 Right roof rail air bag terminal 1 Driver seat side air bag terminal 1 Passenger seat side air bag terminal 1 Driver seat belt anchor pretensioner terminal 1 Passenger seat belt anchor pretensioner terminal 1 If not within the specified range, test the circuit for a short to voltage.
8. Test for less than 1 V between the appropriate low control circuit terminal listed below and ground: Passenger instrument panel air bag Stage 1 terminal 2 Passenger instrument panel air bag Stage 2 terminal 5 Left roof rail air bag terminal 2 Right roof rail air bag terminal 2 Driver seat side air bag terminal 2 Passenger seat side air bag terminal 2 Driver seat belt anchor pretensioner terminal 2 Passenger seat belt anchor pretensioner terminal 2 If not within the specified range, test the circuit for a short to voltage.
9. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal listed below and ground: Passenger instrument panel air bag Stage 1 terminal 1 Passenger instrument panel air bag Stage 2 terminal 4 Left roof rail air bag terminal 1 Right roof rail air bag terminal 1 Driver seat side air bag terminal 1 Passenger seat side air bag terminal 1 Driver seat belt anchor pretensioner terminal 1 Passenger seat belt anchor pretensioner terminal 1 If not within the specified range, test the circuit for a short to ground.
10. Test for infinite resistance between the appropriate low control circuit terminal listed below and ground: Passenger instrument panel air bag Stage 1 terminal 2 Passenger instrument panel air bag Stage 2 terminal 5 Left roof rail air bag terminal 2 Right roof rail air bag terminal 2 Driver seat side air bag terminal 2 Passenger seat side air bag terminal 2 Driver seat belt anchor pretensioner terminal 2 Passenger seat belt anchor pretensioner terminal 2 If not within the specified range, test the circuit for a short to ground.
11. Test for less then 1 ohms between the appropriate high control circuit terminals listed below: Passenger instrument panel air bag Stage 1 terminal 1 and SDM terminal 5 X1 Passenger instrument panel air bag Stage 2 terminal 4 and SDM terminal 8 X1 Left roof rail air bag terminal 1 and SDM terminal 17 X2 Right roof rail air bag terminal 1 and SDM terminal 53 X2 Driver seat side air bag terminal 1 and SDM terminal 13 X2 Passenger seat side air bag terminal 1 and SDM terminal 16 X2 Driver seat belt anchor pretensioner terminal 1 and SDM terminal 9 X2 Passenger seat belt anchor pretensioner terminal 1 and SDM terminal 12 X2 If not within the specified range, test the circuit for an open/high resistance.
12. Test for less then 1 ohms between the appropriate low control circuit terminals listed below: Passenger instrument panel air bag Stage 1 terminal 2 and SDM terminal 6 X1 Passenger instrument panel air bag Stage 2 terminal 5 and SDM terminal 7 X1 Left roof rail air bag terminal 2 and SDM terminal 18 X2 Right roof rail air bag terminal 2 and SDM terminal 54 X2 Driver seat side air bag terminal 2 and SDM terminal 14 X2 Passenger seat side air bag terminal 2 and SDM terminal 15 X2 Driver seat belt anchor pretensioner terminal 2 and SDM terminal 10 X2 Passenger seat belt anchor pretensioner terminal 2 and SDM terminal 11 X2 If not within the specified range, test the circuit for an open/high resistance.
13. If all circuits test normal, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Front Seat Belt Anchor Plate Tensioner Replacement»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Instrument Panel Inflatable Restraint Module Replacement»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
3. «Driver or Passenger Seat Side Inflatable Restraint Module Replacement»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
4. «Roof Side Rail Inflatable Restraint Module Replacement»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
5. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provide an overview of each diagnostic category.

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 seat belt retractor pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage.

A shorting bar used within the seat belt retractor pretensioner connector which will short together both seat belt retractor pretensioner high and low circuits when the connector is disconnected, this will help to prevent unwanted deployment of the inflator module during servicing.

Ignition voltage is between 9-16 V.

B001A 01, B001B 01

The seat belt retractor pretensioner high and/or low circuit is short to voltage for 120 milliseconds.

B001A 02, B001B 02

The seat belt retractor pretensioner high and/or low circuit is short to ground for 120 milliseconds.

B001A 04, B001B 04

The seat belt retractor pretensioner high and/or low circuit is open for 120 milliseconds.

B001A 0D, B001B 0D

The seat belt retractor pretensioner deployment loop resistance is more than 3.9 ohms for 120 milliseconds.

B001A 0E, B001B 0E

The seat belt retractor pretensioner deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
2. The SDM will store a DTC, however if an event occurs the system will still attempt deployments.

1. The condition for setting the DTC no longer exists.
2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

Each seat belt retractor pretensioner requires a specific adapter to connect the load tool to the SIR system.

1. J-38715-A Driver and Passenger SIR Load Tool
2. J-38715-30A SIR Load Tool Adapter

Note. Refer to SIR Service Precautions . When removing the connectors, inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector: Seat belt retractor pretensioner SDM Seat belt retractor wiring harness connector SDM wiring harness connector

Note. The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shoring-bars within the connector allowing the deployment circuit to operate properly.

1. Verify that the inflatable restraint seat belt retractor pretensioner connector and CPA are engaged. If the above condition is not found, make the appropriate repair.
2. Ignition OFF, disconnect the harness connector at the appropriate seat belt retractor pretensioner.
3. Connect the load tool adapter J-38715-A driver and passenger SIR load tool in place of the seat belt retractor pretensioner.
4. Ignition ON, with a scan tool, verify that DTC B001A is set as current. If the DTC is not set or is set as history, cycle the ignition OFF, disconnect the load tool and adapter, reconnect the harness connector at the seat belt retractor pretensioner, and cycle the ignition ON. If the DTC resets after reconnecting the pretensioner, replace the seat belt retractor pretensioner.
5. Ignition OFF, disconnect the load tool and the adapter.
6. Disconnect the harness connector at the seat belt retractor pretensioner.
7. Ignition ON, test for less than 1.0 V between the low control circuit terminal 2 and ground. If greater than the specified range, test the control circuit for a short to voltage.
8. Ignition ON, test for less than 1.0 V between the high control circuit terminal 1 and ground. If greater than the specified range, test the control circuit for a short to voltage.
9. Ignition OFF, test for infinite resistance between the low control circuit terminal 2 and ground. If less than the specified value, test the control circuit for a short to ground.
10. Ignition OFF, test for infinite resistance between the high control circuit terminal 1 and ground. If less than the specified value, test the control circuit for a short to ground.
11. Test for less than 1.0 ohms between the low control circuit terminal 2 and the SDM terminal 38 X2 (driver) or terminal 39 X2 (passenger). If greater than the specified range, test the control circuit for an open/high resistance.
12. Test for less than 1.0 ohms between the high control circuit terminal 1 and the SDM terminal 37 X2 (driver) or terminal 40 X2 (passenger). If greater than the specified range, test the control circuit for an open/high resistance.
13. If all circuits test normal, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Seat Belt Retractor Pretensioner Replacement - Front»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) contains a sensing device that converts vehicle velocity changes into an electrical signal. The SDM compares this electrical signal to a value stored in memory. When the generated signal exceeds the stored value, the SDM performs additional signal processing and compares the generated signals to values stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the deployment loops deploying the air bags and/or pretensioners causing DTC B0052 to set.

Ignition voltage is between 9-16 volts.

B0052 00

1. The SDM detects a frontal impact of sufficient force to warrant deployment of the frontal air bags.
2. The SDM detects a side impact of sufficient force to warrant deployment of a side air bag and/or roof rail air bag.
3. The SDM has deployed the seat belt pretensioner for 3 separate deployments.

1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG warning lamp.
2. The SDM records crash data.

1. DTC B0052 can be cleared if the following conditions are met. Three consecutive seat belt pretensioner deployment events have not occurred. One frontal or side air bag deployment has not occurred.
2. DTC B0052 becomes a latched code after 3 consecutive pretensioner deployments or 1 frontal or side air bag deployment. The DTC is a latched code and cannot be cleared. Replace the SDM after following the instructions in the diagnostic test.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Note. The seat belt pretensioners may deploy for impacts that are not severe enough to warrant frontal or side air bag deployment. The SDM is capable of sustaining 3 pretensioner deployment events, or one frontal or side air bag deployment event. After the maximum number of deployments has occurred, DTC B0052 sets and becomes a latched code, which cannot be cleared.

Verify DTC B0052 is not set.

1. If DTC B0052 is set, clear DTCs. If the DTC resets, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for SDM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The passenger presence sensor continually monitors itself and if a fault in this circuit occurs, a DTC will set in the passenger presence module. When the inflatable restraint sensing and diagnostic module (SDM) detects this DTC within the passenger presence module, it will notify the customer of the enable/disable status by illuminating the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators. Then the passenger presence module will communicate to the SDM through serial data communications that a PPS fault is present. The SDM will then disable the deployment of the passenger instrument panel air bag and then illuminate the AIR BAG warning indicator.

Ignition voltage is between 9-16 V.

1. The SDM has received a fault message from the passenger presence module.
2. The passenger presence module detects a wet seat fault if DTC B0074 0F is set.

1. The SDM disables the passenger instrument panel air bag deployment loop.
2. The SDM will illuminate the OFF portion of the PASSENGER AIR BAG ON/OFF indicator.
3. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

1. The condition for setting the DTC no longer exists.
2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

Diagnostic Aids

1. If either the SDM or PPS were replaced verify that the correct part numbers were used for the vehicle application.
2. If this DTC is set as either current or history it may have been caused by an electronic device. If an electronic device (Computers, MP3 Players, Cell Phones, Diagnostic Scan Tool, Power Inverter, etc.) was placed on the passenger seat the passenger presence module may command the passenger air bag indicator to turn on and/or command the passenger seat belt indicator to turn on. Make sure there are no objects on the passenger seat and clear the DTCs. If this DTC resets then perform this diagnostic. If the DTC does not reset there is no further work needed on the passenger presence system.
3. If this DTC is set as either current or history it may have been caused by an aftermarket seat heater. The aftermarket seat heater may command the passenger air bag indicator to turn on and/or command the passenger seat belt indicator to turn on. Remove the aftermarket seat heater from the passenger seat and clear the DTCs. If this DTC resets then perform this diagnostic. If the DTC does not reset there is no further work needed on the passenger presence system.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. The passenger presence system (PPS) is a calibrated unit. When replacing the assembly all parts in the service kit must remain together. Do not mix any of the old parts with the new parts. PPS comes in as part of a service kit which contains a seat foam, presence sensor and a electronic control unit (ECU) module (if applicable). When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector: Passenger presence module Passenger presence sensor wiring harness

1. Verify that no other passenger presence module DTCs are set. If other passenger presence module DTCs are set, investigate those DTCs first.
2. Verify that DTC B0074 0F is not set. If this DTC is set, verify there are no electronic devices on the passenger seat. If not, then verify the seat is dry by removing the trim from the seat bottom frame. IF the seat is wet, allow 24-48 hours dry time with trim completely off. If the DTC is history, do not replace the passenger presence module. Clear the passenger presence module codes.
3. Verify that DTC B0074 00, B0074 0D, or B0074 0E is not set. If any of the DTCs are set then replace the passenger presence module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for passenger presence system replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the Passenger Presence Module and the Inflatable Restraint Sensing and Diagnostic Module performs tests to diagnose critical malfunctions within itself. When the Inflatable Restraint Sensing and Diagnostic Module has completed the power-up mode, the Inflatable Restraint Sensing and Diagnostic Module will establish communication with the Passenger Presence Module. The Inflatable Restraint Sensing and Diagnostic Module will also request the instrument panel cluster to illuminate both of the PASSENGER AIR BAG ON/OFF indicators for 5 seconds. If the Inflatable Restraint Sensing and Diagnostic Module detects that the Passenger Presence Module has set a current DTC, the Inflatable Restraint Sensing and Diagnostic Module will then disable the passenger instrument panel air bag deployment loop, set DTC B0081, and illuminate the AIR BAG indicator.

Ignition voltage is between 9-16 V.

Any of the following conditions must exist for 5 seconds

B0081 00

The Inflatable Restraint Sensing and Diagnostic Module has a general fault present.

B0081 11

The Passenger Presence Module is above maximum threshold. The Passenger Presence Module failed the preload/build check.

B0081 3A

The Inflatable Restraint Sensing and Diagnostic Module has received a mismatch message indicating the wrong Passenger Presence Module is installed on the vehicle.

B0081 4B

The Passenger Presence Module is not calibrated. Preload procedure has not been run.

B0081 5A

The Passenger Presence Module detects a plausibility error.

B0081 71

The Inflatable Restraint Sensing and Diagnostic Module has received invalid or no serial data from the Passenger Presence Module.

1. The Inflatable Restraint Sensing and Diagnostic Module requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
2. The passenger instrument panel air bag deployment loop will be disabled.

1. The condition for setting the DTC no longer exists.
2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

1. If either the Inflatable Restraint Sensing and Diagnostic Module or Passenger Presence Module were replaced verify that the correct part numbers were used for the vehicle application.
2. If this DTC is set as either current or history it may have been caused by an electronic device. If an electronic device (Computers, MP3 Players, Cell Phones, Diagnostic Scan Tool, Power Inverter, etc.) was placed on the passenger seat the Passenger Presence Module may command the passenger air bag indicator to turn on and/or command the passenger seat belt indicator to turn on. Make sure there are no objects on the passenger seat and clear the DTCs. If this DTC resets then perform this diagnostic. If the DTC does not reset there is no further work needed on the passenger presence system.
3. If this DTC is set as either current or history it may have been caused by an aftermarket seat heater. The aftermarket seat heater may command the passenger air bag indicator to turn on and/or command the passenger seat belt indicator to turn on. Remove the aftermarket seat heater from the passenger seat and clear the DTCs. If this DTC resets then perform this diagnostic. If the DTC does not reset there is no further work needed on the passenger presence system.
4. If this DTC sets with DTC B0081 5A as a history code, do not replace the Passenger Presence Module.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, verify that DTC B0081 is the only DTC set in the Inflatable Restraint Sensing and Diagnostic Module or Passenger Presence Module. If any other DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list) .
2. Verify DTC B0081 00, DTC B0081 3A, or DTC B0081 71 is not set in the Inflatable Restraint Sensing and Diagnostic Module. If any of these DTCs set in the Inflatable Restraint Sensing and Diagnostic Module diagnose the following: Inflatable Restraint Sensing and Diagnostic Module DTC B0081 00: If DTC B0081 00 sets in the Inflatable Restraint Sensing and Diagnostic Module then refer to step 3 and diagnose the Passenger Presence Module DTC B0081 5A. By diagnosing the Passenger Presence Module DTC B0081 5A, DTC B0081 00 will be fixed in the Inflatable Restraint Sensing and Diagnostic Module. Inflatable Restraint Sensing and Diagnostic Module DTC B0081 3A: Either an incorrect replacement Passenger Presence Module or Inflatable Restraint Sensing and Diagnostic Module was placed in this vehicle. Check and make sure the part numbers are correct for each module. If the part numbers are correct clear this DTC and see if DTC B0081 3A resets as a current DTC. If DTC B0081 3A resets then replace the Passenger Presence Module. Clear DTCs again and check if DTC B0081 3A sets as current again. If DTC B0081 3A sets again then replace the Inflatable Restraint Sensing and Diagnostic Module. Inflatable Restraint Sensing and Diagnostic Module DTC B0081 71: If DTC B0081 71 sets in the Inflatable Restraint Sensing and Diagnostic Module then refer to Circuit/System Testing below.
3. DTC B0081 11, DTC B0081 4B, or DTC B0081 5A is set in the Passenger Presence Module, diagnose the following: Passenger Presence Module DTC B0081 11: If DTC B0081 11 sets in the Passenger Presence Module if the correct calibration was not learned by the Passenger Presence Module. Make sure there is nothing on the passenger seat, not even a scan tool. Perform the Passenger Presence Module Preload procedure, refer to «Passenger Presence System Programming and Setup»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems) . Clear the DTC's and check if DTC B0081 11 sets again in the Passenger Presence Module. If DTC B0081 11 sets again replace the Passenger Presence Module. Passenger Presence Module DTC B0081 4B: If DTC B0081 4B sets in the Passenger Presence Module if the correct calibration was not learned by the Passenger Presence Module. Make sure there is nothing on the passenger seat, not even a scan tool. Perform the Passenger Presence Module Preload procedure, refer to «Passenger Presence System Programming and Setup»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems) . Clear the DTC's and check if DTC B0081 11 sets again in the Passenger Presence Module. If DTC B0081 11 sets again replace the Passenger Presence Module. Passenger Presence Module DTC B0081 5A: If DTC B0081 5A sets in the Passenger Presence Module check the connections at the Inflatable Restraint Sensing and Diagnostic Module and Passenger Presence Module. Clear the DTC's and check if DTC B0081 5A sets again as a current DTC in the Passenger Presence Module. If DTC B0081 5A sets then replace the Passenger Presence Module. Clear DTCs again and check if DTC B0081 5A sets as current again. If DTC B0081 5A sets again then replace the Inflatable Restraint Sensing and Diagnostic Module.

Note. When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector: Passenger Presence Module Inflatable Restraint Sensing and Diagnostic Module Passenger Presence Module harness connector Inflatable Restraint Sensing and Diagnostic Module wiring harness connector

1. Ignition OFF, disconnect the harness connector at the Passenger Presence Module.
2. Ignition OFF, test for less then 10 ohms between the ground circuit terminal 4 and ground. If greater then the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 3 and ground. If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.
4. Reconnect all Passenger Presence Module components and perform the «Passenger Presence System Programming and Setup»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems) .
5. Clear all DTCs and operate the vehicle. DTC B0081 should not set. If DTC B0081 sets, replace the Passenger Presence Module.

Perform the Diagnostic Repair Verification after completing the repair.

1. «SIR/SRS Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__sirsrs-wiring-repairs)
2. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for passenger presence system or Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The impact sensors are equipped on vehicles to supplement the Supplemental Inflatable Restraint (SIR) System performance. The impact sensors are electronic and are not part of the deployment loops, but instead provide inputs to the inflatable restraint sensing and diagnostic module. The impact sensors can assist in determining the severity of some frontal and side collisions. The inflatable restraint sensing and diagnostic module uses the input from the impact sensors to assist in determining the severity of a collision further supporting air bag deployment. If the inflatable restraint sensing and diagnostic module determines a deployment is warranted, the inflatable restraint sensing and diagnostic module will cause current to flow through the deployment loops deploying the air bags.

Ignition voltage is between 9-16 V.

Any of the following conditions exist for 10 seconds

B0083 01, B0084 01, B0085 01, B0086 01, B0087 01, B0088 01

The sensor has been shorted to ground.

B0083 02, B0084 02, B0085 02, B0086 02, B0087 02, B0088 02

1. The sensor has been shorted to ground.
2. The sensor current is greater than 23 mA for greater than 5 milliseconds.

B0083 04, B0083 05, B0084 04, B0084 05, B0085 04, B0085 05, B0086 04, B0086 05, B0087 04, B0087 05, B0088 04, B0088 05

1. The sensor has been shorted to battery or is open.
2. The SDM has not received a message from the sensor for greater than 375 milliseconds.

B0083 39, B0084 39, B0085 39, B0086 39, B0087 39, B0088 39

1. The SDM has received a Not OK message from the sensor.
2. The SDM has not received a message.

B0083 3A, B0084 3A, B0085 3A, B0086 3A, B0087 3A, B0088 3A

1. The SDM has received identification message from the sensor, which does not match the identification stored in the SDM memory.
2. The SDM has reset the sensor twice without detecting the correct identification message.

B0083 71, B0084 71, B0085 71, B0086 71, B0087 71, B0088 71

The SDM has received invalid serial data from the sensor.

The SDM requests the instrument panel cluster to illuminate the AIR BAG indicator.

1. The condition for setting the DTC no longer exists.
2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
3. An ignition cycle is required for the DTC to go from current to history.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. Refer to SIR Service Precautions . Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of the affected component/connector. Impact sensor SDM Impact sensor wiring harness connector SDM wiring harness connector The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly. Replace any CPA that is damaged or missing. If the condition is intermittent or cannot be duplicated, disconnect the connectors and add dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087). This procedure will correct the high resistance condition due to terminal fretting corrosion.

1. Verify that DTC B0083-B0088 symptom byte 3A, 39, or 71 is not set as current. If DTC B0083-B0088 symptom byte 3A, 39 or 71 is set as current Replace the appropriate B59 or B63 impact sensor. If DTC B0083-B0088 symptom byte 3A, 39 or 71 is not set as current
2. Verify that DTC B0083-B0088 symptom byte 01, 02, 04, or 05 is not set as current. If DTC B0083-B0088 symptom byte 01, 02, 04, or 05 is set as current Refer to Circuit/System Testing. If DTC B0083-B0088 symptom byte 01, 02, 04, 05 is not set as current
3. All OK.

1. Ignition OFF, disconnect the harness connector at the appropriate B59 or B63 impact sensor, wait 120 seconds.
2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground. If 10 ohms or greater Ignition OFF, disconnect the harness connector at the K36 inflatable restraint sensing and diagnostic module. Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 inflatable restraint sensing and diagnostic module. If less than 10 ohms
3. Test for greater than 50k ohms between the signal circuit terminal 1 and ground. If 50k ohms or less Disconnect the harness connector at the K36 inflatable restraint sensing and diagnostic module. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K36 inflatable restraint sensing and diagnostic module. If greater than 50k ohms
4. Ignition ON, test for less than 1 V between the signal circuit terminal 1 and ground. If greater than 1 V Disconnect the harness connector at the K36 inflatable restraint sensing and diagnostic module. Ignition ON, test for less than 1 V between the signal circuit and ground. If greater than 1 V, repair the short to voltage on the circuit. If less than 1 V, replace the K36 inflatable restraint sensing and diagnostic module. If less than 1 volt
5. Disconnect the harness connector at the inflatable restraint sensing and diagnostic module.
6. Test for less than 2 ohms between the signal circuit end to end from the impact sensor terminal 1 and the inflatable restraint sensing and diagnostic module terminal listed below: Left front side impact sensor terminal 19 X2 Left front impact sensor terminal 23 X2 Right front side impact sensor terminal 27 X2 Right front impact sensor terminal 26 X2 Left rear side impact sensor terminal 22 X2 Right rear side impact sensor terminal 30 X2 If 2 ohms or greater Repair the open/high resistance in the circuit. If less than 2 ohms
7. Reconnect all harness connectors. Ignition ON, clear the DTC.
8. Verify the DTC does not set. If the DTC sets Replace the B59 or B63 impact sensor. If the DTC does not set
9. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Inflatable Restraint Front End Sensor Replacement»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Inflatable Restraint Side Impact Sensor Replacement - Front»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
3. «Inflatable Restraint Side Impact Sensor Replacement - Rear»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system)
4. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for inflatable restraint sensing and diagnostic module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) stores a 4-digit primary key for the inflatable restraint passenger presence system (PPS). The SDM sends the PPS module the primary key. If the PPS module determines that it is the wrong primary key, the PPS module will set DTC B1001 and send the SDM a vehicle mismatch message. The SDM then will set DTC B0081 and illuminate the SIR warning indicator. The PPS module does not use a secondary key.

Ignition voltage is between 9-16 volts.

The 4-digit primary key stored in the SDM does not match the 4-digit key stored in the PPS module.

1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
2. The passenger instrument panel air bag deployment is disabled.

The 4-digit Primary Key in the SDM and in the PPS module match.

This DTC is an indication that the PPS module was not set-up correctly, is not the correct part number or that the PPS module is defective.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
5. «SIR/SRS Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__sirsrs-wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Verify the correct PPS module part number has been installed If the wrong PPS module part number was installed, replace with the correct PPS module.
2. Verify that DTC B1001 is not set as current in the PPS module. If DTC is set as current, perform the PPS Preload procedure. Verify the SDM is sending the correct key. If DTC resets replace the PPS module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for PPS module replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) stores a primary data key, which is a 4-digit number, and a secondary data key, which is a portion of the vehicle identification number (VIN). When the ignition is turned ON, the SDM compares this information to the information stored in the body control module (BCM) over the serial data communication circuit.

Ignition voltage is between 9-16 V.

1. The 4-digit primary data key stored in the SDM does not match the 4 digits stored in the BCM.
2. The VIN stored in the BCM is not in the acceptable range of VINs allowed by the SDM calibration.

1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
2. The SDM disables all deployments.

1. The last 4-digit Primary Data Key in the SDM match the last 4 digits stored in the BCM.
2. The VIN stored in the BCM is in the acceptable range of VINs allowed by the SDM calibration.

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

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, verify the scan tool Primary Key Status parameter displays Valid. If not the specified value, verify the scan tool SDM Primary Key matches the Received Primary Key. If the key does not match, perform the Setup SDM Primary Key in BCM procedure.
2. Ignition ON, verify the scan tool Secondary Key Status displays Valid. If not the specified value, verify the scan tool received VIN Digits 2-7 match the vehicle VIN. If the VIN does not match, reprogram the BCM and perform the Setup SDM Primary Key in BCM procedure. If the VIN matches, reprogram the SDM, ensure the correct SDM calibration is used and perform the Setup SDM Primary Key in BCM procedure.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for SDM or BCM replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The passenger air bag ON/OFF indicators are used to notify the driver when the passenger presence system (PPS) has enabled or disabled the passenger instrument panel air bag. When the ignition is turned ON, the ignition voltage is supplied to the passenger air bag ON/OFF indicators and to the PPS. The instrument panel cluster (IPC) grounds all indicator control circuits to the passenger air bag ON/OFF indicators for illumination. The IPC receives serial data messages from the supplemental inflatable restraints system to turn ON the indicators as necessary.

After the SDM is programmed, the SDM setup procedure is required. During this set up procedure, the SDM will compare the content that was just programmed to the actual components that are installed on the vehicle. If the SDM detects that there are too few or too many components on the system, DTC B1019 00 will set and not allow the setup procedure to complete.

Ignition voltage is between 9-16 V.

B1019 00

1. The SDM was programmed with the wrong options for the vehicle.
2. The wrong components were installed for the content of the vehicle.
3. SDM connector may have bent pins or shorting bars causing the SDM to learn deployment loops that are not actually present.

B1019 3A

1. The vehicle was configured for passenger presence system (PPS) but the SDM does not detect that the PPS indicator is present due to loss of power at indicator.
2. The vehicle is not configured for PPS and the SDM detects that the PPS indicator is present.

1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG warning lamp ON.
2. The SDM disables all deployments when B1019 00 DTC is set as current.

1. The correct SDM must be installed.
2. The correct components must be installed.
3. The PPS indicator operates as indicated in the «SIR System Description and Operation»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system) .

If the SDM has been replaced, make sure that the correct part number was installed for this vehicle. If after programming the SDM DTC B1019 00 sets as current, check for bent pins or shorting bars at the SDM connector.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

B1019 3A

1. With a scan tool, verify DTC B1325 is not set as current in the SDM. If DTC is current refer to «DTC B1325, B1330, B1420, B1424, B1517, C0800, C0895, C0899, C0900, P0560, P0562, or P0563»(/buick/enclave/i-2007-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
2. If equipped with PPS, verify the appropriate PPS indicator segments illuminate by occupying and un-occupying the passenger seat. If the PPS indicator segments do not illuminate properly, refer to «Seat Belt Indicator Malfunction - Passenger»(/buick/enclave/i-2007-2013/remont/restraints-control-systems/#seat-belt-system) .

Note. When removing connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected: PPS SDM PPS wiring harness connector SDM wiring harness connector

B1019 00

1. Ignition ON, verify the scan tool End Model Part Number is correct for the vehicle. If the part number is incorrect, reprogram the SDM.
2. Observe the scan tool PPS Options parameter to determine how the vehicle PPS is currently configured in the SDM. Verify the actual vehicle equipment and the current configuration indicated by the scan tool parameter are the same. If the original configuration does not match the actual vehicle equipment, reprogram the SDM with the correct configuration.
3. Ignition OFF, disconnect the harness connectors at the SDM and verify the connector is in good condition and has no bent pins, terminals or shorting bars. If damage is found, repair the bent pins, terminals or shorting bars as needed and perform the Setup New SDM procedure.
4. Connect the harness connector at the SDM.
5. Ignition ON, verify the scan tool System Configuration matches the actual components installed on the vehicle. If the System Configuration does not match the actual components installed, reprogram the SDM with the correct components.
6. Ignition ON, clear all PPS and SDM DTCs.
7. Verify DTC B1019 does not set. If DTC sets, replace the SDM.

Perform the Diagnostic Repair Verification after completing the repair.

1. «SIR/SRS Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__sirsrs-wiring-repairs)
2. «Control Module References»(/buick/enclave/i-2007-2013/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, programming and setup

Symptoms - SIR

1. Perform «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) before using the symptom tables in order to verify that all of the following are true: There are no 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»(/buick/enclave/i-2007-2013/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»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
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 .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

Air Bag Indicator Circuit Malfunction (Driver) , Air Bag Indicator Circuit Malfunction (Passenger) in order to diagnose the symptom.

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the air bag indicator will turn on and stay on for 8 seconds in the instrument panel cluster (IPC) for a bulb check. The inflatable restraint sensing and diagnostic module (SDM) performs diagnostic tests on the SIR system during the bulb check. If any malfunction exists the SDM will request the IPC to illuminate the air bag indicator steady, via serial data after the original 8 seconds. 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 DTCs present, then disables all deployment loops.

A DTC B1370 may set if the ignition 1 circuit is outside the 9-16 volts range.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Ignition ON, verify the SDM Battery Voltage Signal parameter is 9-16 volts. If not the specified range, refer to «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) .
2. Ignition OFF, monitor the IPC, ignition ON. The SIR warning indicator should turn on and stay on for 8 seconds in the instrument panel cluster (IPC) for a bulb check. If the SIR warning indicator flashes, program the SDM. If the SIR warning indicator remains on steady after the bulb check, test for DTCs and refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list) . If no DTC is current, proceed to the next step.
3. Perform the Display Test in Instrument Panel Cluster/Special Functions. The Air Bag indicator should turn ON and OFF as commanded. If the air bag indicator does not illuminate as expected, replace the IPC.
4. If all circuits test normal, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

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

1. Perform the «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The PASSENGER AIR BAG ON/OFF indicators are used to notify the driver when the Passenger Presence System (PPS) has enabled or disabled the passenger instrument panel air bag. When the ignition is turned ON, the PPS illuminates the PASSENGER AIR BAG ON/OFF indicators for 5 seconds. The passenger presence module conducts tests on the PPS components and circuits while the PASSENGER AIR BAG ON/OFF indicators are illuminated. If no malfunctions are detected, the passenger presence module will illuminate the PASSENGER AIR BAG indicator ON or OFF, depending on the status of the PPS. If a malfunction is detected, the passenger presence module will store a diagnostic trouble code (DTC), default the PPS to the OFF state, and communicate with the SDM that a DTC has been set. The SDM will request the IPC to illuminate the AIR BAG indicator to notify the driver of a PPS malfunction.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

SIR System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/buick/enclave/i-2007-2013/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

With the passenger seat occupied and unoccupied the passenger air bag ON/OFF indicator should switch states within 5 seconds.

1. Ignition OFF, disconnect the harness connector at the passenger air bag ON/OFF indicator.
2. Test for less than 1 ohm between the ground circuit terminal 2 and ground. If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify a test lamp illuminates between the ignition circuit terminal 4 and ground. If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
4. Connect a test lamp between the control circuit terminal 1 and the ignition circuit terminal 4.
5. With the passenger seat occupied and unoccupied the test lamp should switch states within 5 seconds. If the test lamp does not change state, test the control circuit for an open, short to ground, or short to voltage. If all circuits test normal replace the IPC.
6. Connect a test lamp between the control circuit terminal 3 and the ignition circuit terminal 4.
7. With the passenger seat occupied and unoccupied the test lamp should switch states within 5 seconds. If the test lamp does not change state, test the control circuit for an open, short to ground, or short to voltage. If all circuits test normal replace the IPC.
8. If all circuits test normal, replace the passenger air bag ON/OFF indicator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for IPC and passenger air bag ON/OFF indicator replacement, setup, and programming

SIR Disabling and Enabling

SIR component location affects how a vehicle should be serviced. There are parts of the SIR system installed in various locations around a vehicle. To find the location of the SIR components refer to SIR Identification Views .

There are several reasons for disabling the SIR system, such as repairs to the SIR system or servicing a component near or attached to an SIR component. There are several ways to disable the SIR system depending on what type of service is being performed. The following information covers the proper procedures for disabling/enabling the SIR system.

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 if the SDM loses battery power during a collision. Deployment power is available for as much as 1 minute after disconnecting the vehicle power. Waiting 1 minute before working on the system after 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 air bags to temperatures above 65°C (149°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 92 cm (3 feet) or greater

1. Inflatable restraint sensing and diagnostic module (SDM)
2. Any air bag
3. Driver steering wheel air bag coil
4. Any impact sensor
5. Seat belt anchor and/or retractor pretensioners
6. Passenger presence module and/or occupant sensor

Disabling Procedure - Air Bag Fuse

1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
2. Place the ignition in the OFF position.
3. Locate and remove the fuse(s) supplying power to the SDM. Refer to «SIR Schematics»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system) , or «Electrical Center Identification Views»(/buick/enclave/i-2007-2013/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-electrical-center-identification-views) .
4. Wait 1 minute before working on the system.

Enabling Procedure - Air Bag Fuse

1. Place the ignition in the OFF position.
2. Install the fuse(s) supplying power to the SDM. Refer to «SIR Schematics»(/buick/enclave/i-2007-2013/remont/airbag/#supplemental-inflatable-restraint-system) , or «Electrical Center Identification Views»(/buick/enclave/i-2007-2013/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-electrical-center-identification-views) .
3. Turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
4. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) .

Disabling Procedure - Negative Battery Cable

1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
2. Place the ignition in the OFF position.
3. Disconnect the negative battery cable from the battery. Refer to «Battery Negative Cable Disconnection and Connection»(/buick/enclave/i-2007-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
4. Wait 1 minute before working on system.

Enabling Procedure - Negative Battery Cable

1. Place the ignition in the OFF position.
2. Connect the negative battery cable to the battery. Refer to «Battery Negative Cable Disconnection and Connection»(/buick/enclave/i-2007-2013/remont/charging-system/#battery-charging-system-and-starting-system) .
3. Turn the ignition switch to the ON position. The AIR BAG indicator will flash then turn OFF.
4. Perform the Diagnostic System Check - Vehicle if the AIR BAG warning indicator does not operate as described. Refer to «Diagnostic System Check - Vehicle»(/buick/enclave/i-2007-2013/remont/oem-general-information/#vehicle-diagnostic-information) .

General Service Instructions

Note. The inflatable restraint sensing and diagnostic module (SDM) maintains a reserved energy supply. The reserved energy supply provides deployment power for the SIR air bags. Deployment power may be available for up to 60 seconds after disconnecting the vehicle power. Disabling the SIR system prevents deployment of the SIR air bags from the reserved energy supply.

Note. 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 air bags to temperatures above 65°C (149°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

Note. Discard any of the following components if it has been dropped from a height of 92 cm (3 ft) or greater

1. SDM
2. Passenger instrument panel air bag
3. Driver steering wheel air bag
4. Driver steering wheel air bag coil
5. Roof rail air bags
6. Front and /or side impact sensors
7. Seat belt achor and/or retractor pretensioners
8. Front seat side air bag

Scheme 5

Inflatable Restraint Front End Sensor Replacement

Scheme 6

Airbag Sensing and Diagnostic Module Replacement

Scheme 7

Steering Wheel Inflatable Restraint Module Replacement

Scheme 8

Steering Wheel Airbag Coil Replacement

Inflatable Restraint Steering Wheel Module Coil Centering

Special Tools

J-42640 Steering Column Anti-rotation Pin

1. Verify the following conditions before centering the inflatable restraint steering wheel module coil : The wheels on the vehicle are pointed straight ahead. The block tooth (1) of the steering shaft is in the 12 o'clock position. The ignition and start switch is in the LOCK position, or anti-rotation pin J-42640 pin is installed.
2. If the front side (3) of the inflatable restraint steering wheel module coil does NOT have a centering window, and the back side (2) does NOT have a spring service lock (1), perform the following steps: Hold the coil with the face up. Rotate the coil hub clockwise until the coil ribbon stops. Rotate the coil hub, slowly, counter clockwise, for 2.5 revolutions. This is center position. While maintaining the coil hub in center position, align the centered coil with the horn tower and slide onto the steering shaft.

Scheme 9

Instrument Panel Inflatable Restraint Module Replacement

Scheme 10

Inflatable Restraint Passenger Presence System Replacement - Front

Scheme 11

Driver or Passenger Seat Side Inflatable Restraint Module Replacement

Scheme 12

Inflatable Restraint Side Impact Sensor Replacement - Front

Scheme 13

Inflatable Restraint Side Impact Sensor Replacement - Rear

Scheme 14

Inflatable Restraint Instrument Panel Module Indicator Replacement

Scheme 15

Roof Side Rail Inflatable Restraint Module Replacement

Scheme 16

Front Seat Belt Anchor Plate Tensioner Replacement

Scheme 17

Seat Belt Retractor Pretensioner Replacement - Front

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-Inspect the steering column for bending, twisting, buckling or any type of damage.
2. The instrument panel knee bolsters and mounting points-Inspect the knee bolsters for bending, twisting, buckling, or any other type of damage.
3. The instrument panel 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»(/buick/enclave/i-2007-2013/remont/restraints-control-systems/#seat-belt-system__repairs-and-inspections-required-after-a) .
5. The instrument panel cross car beam-Inspect for bending, twisting, buckling, or any other type of damage.
6. The instrument panel 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.
9. The brake pedal --Inspect the brake pedal for bending, twisting, buckling or any type of damage.

Accident With Frontal Air Bag Deployment - Component Replacement and Inspections

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

1. Driver steering wheel air bag
2. Passenger instrument panel air bag, if deployed
3. Inflatable Restraint Sensing and Diagnostic Module (SDM), if the Inflatable Restraint Sensing and Diagnostic Module has set DTC B0052 and will not clear
4. Front and/or side impact sensors
5. Driver/Passenger seat side air bag, if deployed
6. Seat back cover if side seat air bag is deployed
7. Driver/Passenger seat belt anchor and/or retractor pretensioners

Perform additional inspections on the following components.

1. Steering wheel air bag 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 passenger instrument panel air bag, steering wheel air bag, Inflatable Restraint Sensing and Diagnostic Module, seat side air bag (if deployed) and seat belt anchor and/or retractor pretensioners-Inspect for any damage and repair or replace each component as needed.

Accident With Side Seat Air Bag Deployment - Component Replacement and Inspections

After a collision involving driver/passenger side seat air bag deployment, replace the following components.

1. Left/right side impact sensors on the side of the impact.
2. Left/right roof rail air bag on the side of the impact.
3. Inflatable Restraint Sensing and Diagnostic Module (SDM), if the Inflatable Restraint Sensing and Diagnostic Module has set DTC B0052 and will not clear.
4. Inflatable restraint seat belt anchor and/or retractor pretensioner.
5. Driver or passenger seat back cushion cover replacement.

Perform additional inspections on the following components.

1. Mounting points or mounting hardware for the side impact sensors, and driver/passenger side seat air bags on the side of impact-Inspect for any damage and repair or replace each component as needed.
2. Mounting points, mounting hardware, headliner and trim pieces for the left/right roof rail air bag 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 Inflatable Restraint Sensing and Diagnostic Module and seat belt anchor and/or retractor pretensioners-Inspect for any damage and repair or replace each component as needed.
4. The seat cushion frame
5. The seat recliner and cover, if equipped
6. The seat adjuster
7. The seat back frame
8. Door trim assembly
9. Impacted seat cushion side covers and switches

Impact Sensor Replacement Guidelines

The impact sensor replacement policy requires replacing sensors in the area of the 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 object. If the vehicle has an impact sensor mounted forward of the radiator, it must be replaced.

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

Impact 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 system. Do not try to determine whether the impact sensor is undamaged, replace the impact sensor. Also, if you follow a diagnostic trouble code (DTC) procedure and a malfunctioning impact sensor is indicated, replace the impact sensor.

Inflatable Restraint Module Handling and Scrapping

Special Tools

1. EL-38826 SIR Deployment Harness
2. EL-39401-B SIR Deployment Fixture

For equivalent regional tools, refer to Special Tools .

Live and Undeployed Air Bag

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

Dual Stage Air Bags

Dual stage air bags have two deployment stages. If stage 1 was used to deploy a dual stage air bag, stage 2 may still be active. Therefore, a deployed dual stage air bag must be treated as an active air bag. If disposal of a dual stage air bag 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 and undeployed air bag. Do NOT dispose a live and undeployed air bag through normal disposal channels until the air bag has been deployed.

Do not deploy the air bag in the following situations

1. After replacement of an air bag under warranty-the air bag may need to be returned undeployed to the manufacturer.
2. If the vehicle is the subject of a product liability claim, related to the SIR system and is subject to a preliminary investigation - do NOT alter the SIR system in any manner.
3. If the vehicle is involved in a campaign affecting the air bags - follow the instructions in the campaign service bulletin for proper SIR handling procedures.

Deployment Procedures

Note. Some countries, states or localities may not allow service deployment of air bags without special permission or training. Local laws regarding deploying and scrapping of air bags/devices with pyrotechnics must be followed.

You can deploy the air bag either 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 Air Bag, Instrument Panel Air Bag, and Roof Rail Air Bag

Deploy the air bag 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 air bag is malfunctioning.
2. The air bag is cosmetically damaged, scratched, or ripped.
3. The air bag pigtail is damaged.
4. The air bag connector is damaged.
5. The air bag connector terminals are damaged.

Deployment and disposal of a malfunctioning air bag is subject to any required retention period.

1. Turn OFF the ignition.
2. Remove the air bag.
3. Clear a space on the ground about 1.85 m (6 ft) in diameter for deployment of the air bag or deployment fixture. If possible, use a paved, outdoor location free of activity. Otherwise, use a space free of activity on the shop floor. Ensure you have sufficient ventilation.
4. Clear the area of loose or flammable objects.
5. If you are deploying a steering wheel air bag, place the air bag in the center of the space with the vinyl trim cover facing up and away from the surface.
6. When deploying an instrument panel air bag, perform the following instructions: Place the EL-39401-B fixture in the center of the cleared area. Fill the deployment fixture with water or sand. Using the proper nuts and bolts, mount the instrument panel air bag (1) to the deployment fixture (2), with the vinyl trim facing up. Securely tighten all fasteners that hold the instrument panel air bag (1) to the deployment fixture (2).
7. When deploying a roof rail air bag, perform the following instructions: Place the EL-39401-B fixture (3) in the center of the cleared area. Fill the deployment fixture with water or sand to provide sufficient stabilization of fixture during deployment. Adjust and secure the fixture arms (4) to the deployment fixture (3), using the proper nuts and bolts. Attach the roof rail air bag in the deployment fixture and securely tighten all fasteners.
8. Inspect the EL-38826 harness and the appropriate pigtail adapter (2) for damage. Replace as needed.
9. Short the 2 SIR deployment harness leads (1) together using one banana plug seated into the other.
10. Connect the appropriate pigtail adapter (2) to the SIR deployment harness (1).
11. Extend the SIR deployment harness and adapter to the full length from the deployment fixture or area.
12. Connect the air bag (1) to the adapter (2) on the SIR deployment harness (3).
13. Clear the area of people.
14. Separate the 2 banana plugs on the SIR deployment harness that were shorted together earlier in the procedure.
15. Place a 12 V minimum/2A minimum power source, such as a vehicle battery, near the shorted end of the harness.
16. Connect the SIR deployment harness wires to the power source. Deployment of the air bag will occur when contact is made.
17. Disconnect the SIR deployment harness from the power source after the air bag deploys.
18. If the air bag did not deploy, disconnect the adapter and discontinue the procedure and contact the Technical Assistance Group. If deployment was successful, proceed to the following steps.
19. Seat one banana plug into the other in order to short the deployment harness leads.
20. Put on a pair of shop gloves.
21. Disconnect the pigtail adapter from the air bag as soon as possible.
22. Inspect the pigtail adapter and the SIR deployment harness. Replace as needed.
23. Dispose of the deployed air bag through normal refuse channels.
24. Wash your hands with a mild soap.

Deployment Inside Vehicle - Vehicle Scrapping Procedure

Deploy the air bags 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 all useful life.
2. Irrepairable damage occurred to the vehicle in a non-deployment type accident.
3. Irrepairable damage occurred 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. Lower the driver and passenger windows.
2. Turn the ignition switch to the OFF position and remove the ignition key.
3. Check that all air bags which will be deployed are mounted securely.
4. Remove all loose objects from the front seats.
5. Disconnect the steering wheel air bag yellow connector (1) from vehicle harness yellow connector (3).
6. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
7. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
8. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gauge) or thicker multi-strand wire. Use these wires to fabricate the driver deployment harness.
9. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
10. 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 air bag.
11. Twist together the 2 connector wire leads from the high circuits from both stages of the steering wheel air bag, to one set of deployment wires. Refer to «COMPONENT CONNECTOR END VIEWS - INDEX»(/buick/enclave/i-2007-2013/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-index) in order to determine the correct circuits.
12. Inspect that the 3-wire connection is secure.
13. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
14. Twist together the 2 connector wire leads from the low circuits from both stages of the steering wheel air bag, to one set of deployment wires. Refer to «COMPONENT CONNECTOR END VIEWS - INDEX»(/buick/enclave/i-2007-2013/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-index) in order to determine the correct circuits.
15. Inspect that the 3-wire connection is secure.
16. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
17. Connect the deployment harness to the connector on the steering wheel air bag.
18. Route the deployment harness out of the driver side of the vehicle.
19. Disconnect the yellow left roof rail harness connector from the vehicle harness connector.
20. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
21. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
22. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gauge) or thicker multi-strand wire. These wires will be used to fabricate the roof rail air bag deployment harness.
23. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
24. Twist together one end from each of the wires in order to short the wires.
25. Twist together one connector wire lead to one deployment wire.
26. Secure and insulate the connection using electrical tape.
27. Twist together and tape the remaining connector wire lead to the remaining deployment wire.
28. Connect the deployment harness to the yellow connector of the roof rail air bag.
29. Route the deployment harness out of the driver side of the vehicle.
30. Disconnect the instrument panel air bag yellow harness connector (1) from the vehicle harness connector (2).
31. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
32. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
33. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gauge) or thicker multi-strand wire. These wires will be used to fabricate the passenger deployment harness.
34. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
35. Twist together one end from each of the wires in order to short the wires.
36. Twist together the 2 connector wire leads from the high circuits from both stages of the instrument panel air bag to one set of deployment wires. Refer to «COMPONENT CONNECTOR END VIEWS - INDEX»(/buick/enclave/i-2007-2013/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-index) in order to determine the correct circuits.
37. Inspect that the 3-wire connection is secure.
38. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
39. Twist together the 2 connector wire leads from the low circuits from both stages of the instrument panel air bag to one set of deployment wires. Refer to «COMPONENT CONNECTOR END VIEWS - INDEX»(/buick/enclave/i-2007-2013/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-index) in order to determine the correct circuits.
40. Inspect that the 3-wire connection is secure.
41. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
42. Connect the deployment harness to the instrument panel air bag in-line connector.
43. Route the deployment harness out of the passenger side of the vehicle.
44. Disconnect the yellow harness connector to the right roof rail air bag from the vehicle harness connector.
45. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
46. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
47. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gauge) or thicker multi-strand wire. These wires will be used to fabricate the roof rail air bag deployment harness.
48. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
49. Twist together one end from each of the wires in order to short the wires.
50. Twist together one connector wire lead to one deployment wire.
51. Secure and insulate the connection using electrical tape.
52. Twist together and tape the remaining connector wire lead to the remaining deployment wire.
53. Connect the deployment harness to the roof rail air bag yellow connector.
54. Route the deployment harness out of the passenger side of the vehicle.
55. Completely cover the windshield and the front door window openings with a drop cloth.
56. Stretch to the full length all of the deployment harness wires on the right side of the vehicle.
57. Deploy each deployment loop one at a time.
58. Place a power source, 12 V minimum/2A minimum, such as a vehicle battery, near the shorted end of the harnesses.
59. Separate one set of wires and touch the wire ends to the power source in order to deploy the selected air bag.
60. Disconnect the deployment harness from the power source and twist the wire ends together.
61. Continue the same process with the remaining deployment harnesses.
62. Disconnect all harnesses from the vehicle.
63. Discard the harnesses.
64. Scrap the vehicle in the same manner as a non-SIR equipped vehicle.
65. If one or all of the air bags did not deploy, remove the undeployed air bags from the vehicle.

During the course of a vehicles 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.

Note. Some countries, states or localities may not allow service deployment of air bags without special permission or training. Local laws regarding deploying and scrapping of air bags/devices with pyrotechnics must be followed.

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 Inflatable Restraint 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.

Special Tools

1. EL-39401-B SIR Deployment Fixture
2. EL-38826 SIR Deployment Harness

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.
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 EL-39401-B SIR deployment fixture in the center of the cleared area.
9. Fill the fixture plastic reservoir with water or sand.
10. Mount the pretensioner (1) in the SIR deployment fixture (3) with the open end facing up using the following mounting method. Adjust and secure the EL-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 EL-38826 SIR deployment harness and the appropriate pigtail adapter for damage. 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.

SIR System Overview

The supplemental inflatable restraint (SIR) system supplements the protection offered by the seat belts. The SIR system contains an inflatable restraint sensing and diagnostic module (SDM), air bags, seat belt pretensioner (anchor and retractor), and impact sensors. The SDM determines the severity of a collision with the assistance of impact sensors located at strategic points on the vehicle. When the SDM detects a collision, the SDM will process the information provided by the sensors to further support air bag or pretensioner deployment. The SDM will deploy the air bags and pretensioners if it detects a collision of sufficient force. If the force of the impact is not sufficient to warrant air bag deployment, the SDM may still deploy the seat belt pretensioners. The SDM contains a sensing device that converts vehicle velocity changes to an electrical signal. The SDM compares these signals to values stored in memory. If the signals exceed a stored value, the SDM will determine the severity of the impact and either cause current to flow through the frontal deployment loops deploying the frontal air bags and pretensioners, or it will deploy the pretensioners only. The SDM continuously monitors the deployment loops for malfunctions and illuminates the SIR system AIR BAG indicator if a fault is detected.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 illuminating the SIR system AIR BAG indicator. The steering column and knee bolsters 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.

SIR System AIR BAG Indicator

The SIR system AIR BAG indicator, located in the instrument cluster, is used to notify the driver of SIR system malfunctions and to verify that the inflatable restraint sensing and diagnostic module (SDM) is communicating with the instrument cluster. When the ignition is turned ON, the SDM is supplied with ignition positive voltage. The instrument cluster will momentarily turn on the SIR system AIR BAG indicator steady for 8 seconds. While the indicator is on, the SDM conducts tests on all SIR system components and circuits. If no malfunctions are detected the SDM will communicate with the instrument cluster through the serial data circuit and command the SIR system 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 instrument cluster to illuminate the SIR system AIR BAG indicator via serial data. 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 SIR system AIR BAG indicator will remain ON until the malfunction has been repaired.

Inflatable Restraint Sensing and Diagnostic Module (SDM)

The inflatable restraint sensing and diagnostic module (SDM) is a microprocessor and the control center for the supplemental inflatable restraint (SIR) system. The SDM contains internal sensors along with external impact sensors, mounted at strategic locations on the vehicle. In the event of a collision, the SDM compares the signals from the internal and external impact 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 illuminates the SIR system AIR BAG indicator located in the instrument cluster. 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 request the instrument cluster to illuminate the SIR system AIR BAG indicator, notifying the driver that a malfunction exists. In the event that ignition positive voltage is lost during a collision, the SDM maintains a 23-volt loop reserve for deployment of the air bags. It is important when disabling the SIR system for servicing or rescue operations to allow the 23-volt loop reserve to dissipate, which could take up to 1 minute.

Air Bags

This vehicle contains 6 air bags. The 6 air bags are located in the steering wheel (dual air bags), instrument panel (passenger side) (dual air bags), driver side (seat), passenger side (seat), left roof rail, right roof rail. To view the locations of the air bags refer to SIR Identification Views . Air bags contain a housing, inflatable air bag, two initiating devices (if dual air bags), canister of gas generating material and, in some cases, stored compressed gas. The deployment loops supply current to deploy the air bags. The steering wheel and passenger instrument panel air bags have two stages of deployment, which varies the amount of restraint to the occupant according to the collision severity. For moderate frontal collisions the air bags deploy at less than full deployment which consists of stage 1. For more severe frontal collisions a full deployment is initiated which consists of stage 1 and stage 2 of the air bags. The current passing through the air bags ignite 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. A shorting bar (if equipped) is located in the connector.

Seat Belt Pretensioner (Anchor and Retractor)

The seat belt pretensioner (driver and passenger) consist of a housing, seat belt retractor (located in the B-pillar), seat belt anchor (located in the seat), seat belt webbing, an initiator, and a canister of gas generating materials. To view the locations of the seat belt pretentioners refer to SIR Identification Views . The initiator is part of the seat belt pretensioner deployment loop. When the vehicle is involved in a collision of sufficient force, the SDM causes current to flow through the seat belt deployment loops to the initiator. Current passing through the initiator ignites the material in the canister producing a rapid generation of gas. The gas produced from this reaction deploys the seat belt pretensioners which removes all of the slack in the seat belts. Depending on the severity of the collision, the seat belt pretensioners may deploy without the frontal air bags deploying, or they will deploy immediately before the frontal air bags deploy. A shorting bar (if equipped) is located in the connector.

Impact Sensors

This vehicle contains 6 impact sensors. The 6 impact sensors are located in the front of the vehicle (left and right), and the 4 doors. To view the locations of the impact sensors refer to SIR Identification Views . The impact sensors contain a sensing device which monitors vehicle acceleration and velocity changes to detect side collisions that are severe enough to warrant air bag deployment. The impact sensor are not part of the deployment loop, but instead provide input to the 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 appropriate air bags.

Passenger Presence Detection System and Passenger Air Bag Indicator (If Equipped)

Note. The passenger presence system (PPS) is a calibrated unit. When replacing the assembly all parts in the service kit must remain together. Do not mix any of the old parts with the new parts. After repairing or replacing the PPS, the preload test must be performed in order to function properly.

The passenger presence detection system (PPS) is used to monitor the type of occupant that is sitting in the front passenger seat and communicate the status to the inflatable restraint sensing and diagnostic module (SDM). The SDM then uses this information to determine whether to enable or suppress the deployment of the passenger instrument panel air bag. The PPS consists of an electronic control module, a sensor mat in the seat, a harness, and PASSENGER AIR BAG ON/OFF indicators. The PPS transmits and receives a low-level electric field. The measured capacitance value of this field is used to determine the type of occupant sitting in the front passenger seat. If the measured capacitance is less than a calibrated value, then the PPS module will send a serial data signal to the SDM to disable the passenger instrument panel air bag. If the measured capacitance is greater than a calibrated value, then the PPS module will send a serial data signal to the SDM to enable the passenger instrument panel air bag. The SDM will notify the customer of the enable/disable status by illuminating one of the PASSENGER AIR BAG ON/OFF indicator. The PPS monitors itself for faults and will displays diagnostic trouble codes (DTCs) onthe scan tool. When a fault is detected, the PPS module sends out a message to the SDM. The SDM responds by sending a command message to the IPC to illuminate the SIR system AIR BAG indicator.

Seat Belt Indicators

The seat belt indicators are controlled through the inflatable restraint sensing and diagnostic module (SDM). For further information on seat belt indicators refer to Seat Belt System Description and Operation

Special Tools

Illustration Tool Number/ Description EL 38826 J 38826 KM 799-3 SIR Deployment Harness EL 39401-B J 39401-B SIR Deployment Fixture

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS - INDEX
• Circuit Testing
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Connector Repairs
• Control Module References
• Diagnostic Repair Verification
• Diagnostic Trouble Code (DTC) List - Vehicle
• Passenger Presence System Programming and Setup
• SIR/SRS Wiring Repairs
• DTC B1325, B1330, B1420, B1424, B1517, C0800, C0895, C0899, C0900, P0560, P0562, or P0563
• Seat Belt Indicator Malfunction - Passenger
• Checking Aftermarket Accessories
• Electrical Center Identification Views
• Fastener Caution
• SIR Warning
• Front Floor Console Replacement (Enclave)
• SIR Inflator Module Handling and Storage Warning
• Steering Wheel Replacement
• Ignition Lock Cylinder Opening Trim Cover Replacement
• Instrument Panel Trim Pad Replacement (Enclave)
• Bucket Seat Replacement
• Front Side Door Trim Panel Replacement - Left Side (Traverse)
• Front Side Door Trim Panel Replacement - Left Side (Acadia)
• Rear Side Door Trim Panel Replacement (Traverse)
• Headlining Trim Panel Replacement
• Repairs and Inspections Required After a Collision
• SIR Inflator Module Disposal Warning
• SIR Deployed Inflator Modules Are Hot Warning
• SIR Inflatable Module Deployment Outside Vehicle Warning
• SIR Disabling and Enabling
• DTC B0012 or B0013
• SIR Identification Views
• Inflatable Restraint Module Handling and Scrapping
• Inflatable Restraint Steering Wheel Module Coil Centering
• Special Tools