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Supplemental Inflatable Restraint System Chevrolet Impala IX

Airbag 16 illustrations ~16756 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Inflatable Restraint Front End Sensor Fasteners11 ± 1.5 N.m97 ± 13 lb in
Inflatable Restraint Instrument Panel (I/P) Module Fasteners10 N.m89 lb in
Inflatable Restraint Roof Rail Module Fasteners9 N.m80 lb in
Inflatable Restraint Sensing and Diagnostic Module (SDM) Fasteners10 N.m89 lb in
Inflatable Restraint Side Impact Module Fasteners5 N.m45 lb in
Inflatable Restraint Side Impact Sensor (SIS) Fasteners10 N.m89 lb in
Seat Shoulder Belt Retractor Pretensioner Anchor Fastener42 N.m31 lb ft
Seat Shoulder Belt Retractor Pretensioner Fastener42 N.m31 lb ft
Seat Shoulder Belt Retractor Pretensioner Guide Fastener42 N.m31 lb ft

Scheme 1

Scheme 1: SIR Wiring Schematics
Scheme 1: SIR Wiring Schematics

Scheme 2

Scheme 2
Scheme 2

Scheme 3

Scheme 3
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

Scheme 4: SIR Identification Views
Scheme 4: SIR Identification Views
CalloutComponent Name
1Right Front Impact Sensor-Located under the hood at the front right side of the vehicle
2Vehicle Battery-Located at the front left of the engine compartment
3Front Hood Assist Rod-A gas shock located under the front hood on the passenger side
4Passenger Instrument Panel Air Bag-Located at the top right under the instrument panel
5Right Roof Rail Air Bag-Located under the headliner, extending from the passenger front windshield pillar to the passenger rear windshield pillar
6Right Front Side Impact Sensor (SIS)-Located behind door panel on the passenger front door
7Inflatable Restraint Sensing and Diagnostic Module (SDM)-Located underneath the passenger front seat under the vehicle carpet
8Passenger Presence System (PPS)-Located on the passenger front seat underneath the seat bottom trim
9Passenger Seat Belt Anchor Pretensioner-Located on the outboard side of the passenger seat
10Passenger Seat Side Air Bag-Located on the seat back of passenger seat
11Passenger Seat Belt Retractor Pretensioner-Located under the trim near the bottom of the center pillar on the passenger side of vehicle in the Sedan
12Inflator Module for Right Roof Rail Air Bag-Located behind the garnish molding on the upper rear pillar
13Rear Hood Assist Rod-A gas shock located under the rear truck lid on the passenger side
14Rear Hood Assist Rod-A gas shock located under the rear truck lid on the driver side
15Inflator Module for Left Roof Rail Air Bag-Located behind garnish molding on the upper rear pillar
16Driver Seat Belt Retractor Pretensioner-Located under the trim near the bottom of the center pillar on the driver side of vehicle in the Sedan
17Driver Seat Side Air Bag-Located on the seat back of driver seat
18Driver Seat Belt Anchor Pretensioner-Located on the outboard side of the driver seat
19Left Front Side Impact Sensor (SIS)-Located behind door panel on the driver front door
20Left Roof Rail Air Bag-Located under the headliner, extending from the driver front windshield pillar to the driver rear windshield pillar
21Driver Steering Wheel Air Bag-Located on the steering wheel
22Front Hood Assist Rod-A gas shock located under the front hood on the driver side
23Left Front Impact Sensor-Located under the hood at the front left side of the vehicle

DIAGNOSTIC CODE INDEX

DTCDescription
DTC B0012 or B0013B0012 01: Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Battery B0012 02: Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Ground B0012 04: Driver Steering Wheel Air Bag Deployment Loop Stage 1 Open Circuit B0012 0D: Driver Steering Wheel Air Bag Deployment Loop Stage 1 Resistance Above Threshold B0012 0E: Driver Steering Wheel Air Bag Deployment Loop Stage 1 Resistance Below Threshold B0013 01: Driver Steering Wheel Air Bag Deployment Loop Stage 2 Short to Battery B0013 02: Driver Steering Wheel Air Bag Deployment Loop Stage 2 Short to Ground B0013 04: Driver Steering Wheel Air Bag Deployment Loop Stage 2 Open Circuit B0013 0D: Driver Steering Wheel Air Bag Deployment Loop Stage 2 Resistance Above Threshold B0013 0E: Driver Steering Wheel Air Bag Deployment Loop Stage 2 Resistance Below Threshold
DTC B0014-B0045
DTC B001A or B001BB001A 01: Driver Seat Belt Anchor Pretensioner Deployment Loop Short to Battery B001A 02: Driver Seat Belt Anchor Pretensioner Deployment Loop Short to Ground B001A 04: Driver Seat Belt Anchor Pretensioner Deployment Loop Open Circuit B001A 0D: Driver Seat Belt Anchor Pretensioner Deployment Loop Resistance Above Threshold B001A 0E: Driver Seat Belt Anchor Pretensioner Deployment Loop Resistance Below Threshold B001B 01: Passenger Seat Belt Anchor Pretensioner Deployment Loop Short to Battery B001B 02: Passenger Seat Belt Anchor Pretensioner Deployment Loop Short to Ground B001B 04: Passenger Seat Belt Anchor Pretensioner Deployment Loop Open Circuit B001B 0D: Passenger Seat Belt Anchor Pretensioner Deployment Loop Resistance Above Threshold B001B 0E: Passenger Seat Belt Anchor Pretensioner Deployment Loop Resistance Below Threshold
DTC B0052, B0053, or B0055B0052 00: Deployment Commanded B0053 00: Deployment Commanded With Loop DTCs Present B0055 00: Seat Side Air Bag Deployment Commanded
DTC B0056-B0058B0056 00: Passenger Frontal Air Bag Suppressed B0057 00: Passenger Side Air Bag Suppressed B0058 00: Passenger Pretensioner Suppressed
DTC B0074B0074 00: Passenger Presence Sensor B0074 0D: Passenger Presence Sensor Circuit Resistance Above Threshold B0074 0E: Passenger Presence Sensor Circuit Resistance Below Threshold B0074 0F: Passenger Presence Sensor Circuit Erratic (Wet Seat)
DTC B0081B0081 0F: Passenger Presence Module Erratic B0081 11: Passenger Presence Module Above Threshold (Build Check Failure) B0081 3A: Passenger Presence Module Incorrect Component Installed B0081 4B: Passenger Presence Module Calibration Not Learned B0081 5A: Passenger Presence Module Plausibility Failure B0081 71: Passenger Presence Module Invalid Serial Data Received
DTC B0083-B0088B0083 01: Left Front Impact Sensor Short to Battery B0083 02: Left Front Impact Sensor Short to Ground B0083 05: Left Front Impact Sensor Short to Battery or Open B0083 0F: Left Front Impact Sensor Erratic B0083 39: Left Front Impact Sensor Internal Electronic Failure B0083 3A: Left Front Impact Sensor Incorrect Component Installed B0083 71: Left Front Impact Sensor Invalid Serial Data Received B0084 01: Right Front Impact Sensor Short to Battery B0084 02: Right Front Impact Sensor Short to Ground B0084 05: Right Front Impact Sensor Short to Battery or Open B0084 0F: Right Front Impact Sensor Erratic B0084 39: Right Front Impact Sensor Internal Electronic Failure B0084 3A: Right Front Impact Sensor Incorrect Component Installed B0084 71: Right Front Impact Sensor Invalid Serial Data Received B0085 01: Left Front Side Impact Sensor Short to Battery B0085 02: Left Front Side Impact Sensor Short to Ground B0085 05: Left Front Side Impact Sensor Short to Battery or Open B0085 0F: Left Front Side Impact Sensor Erratic B0085 39: Left Front Side Impact Sensor Internal Electronic Failure B0085 3A: Left Front Side Impact Sensor Incorrect Component Installed B0085 71: Left Front Side Impact Sensor Invalid Serial Data Received B0086 01: Right Front Side Impact Sensor Short to Battery B0086 02: Right Front Side Impact Sensor Short to Ground B0086 05: Right Front Side Impact Sensor Short to Battery or Open B0086 0F: Right Front Side Impact Sensor Erratic B0086 39: Right Front Side Impact Sensor Internal Electronic Failure B0086 3A: Right Front Side Impact Sensor Incorrect Component Installed B0086 71: Right Front Side Impact Sensor Invalid Serial Data Received
DTC B1001 (SDM)B1001 00: SDM Option Configuration Error
DTC B1001 (PPS)B1001 00: Option Configuration Error
DTC B1019B1019 00: SDM System Configuration Error B1019 3A: SDM System Configuration Error Incorrect Component Installed
DTC B1370B1370 06: Device Ignition 1 Circuit Short to Ground or Open

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

CircuitShort to GroundLow ResistanceHigh ResistanceOpenShort to Voltage
Driver Steering Wheel Air Bag Stage 1 High ControlB0012 02B0012 0EB0012 0DB0012 04B0012 01
Driver Steering Wheel Air Bag Stage 1 Low ControlB0012 02B0012 0EB0012 0DB0012 04B0012 01
Driver Steering Wheel Air Bag Stage 2 High ControlB0013 02B0013 0EB0013 0DB0013 04B0013 01
Driver Steering Wheel Air Bag Stage 2 Low ControlB0013 02B0013 0EB0013 0DB0013 04B0013 01

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 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 bage 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.

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.
  2. The SDM will store a DTC, however if an event occurs the system will still attempt deployment.

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

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  4. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/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 SIR Driver/Passenger Load Tool. See Special Tools .

Circuit/System Testing

IMPORTANTRefer 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: Driver steering wheel air bag SDM Driver steering wheel air bag wiring harness connector SDM wiring harness connector
  1. Verify that the Driver steering wheel air bag connector and the CPA are engaged. If the above condition is not found, make the appropriate repair.
  2. Ignition OFF, disconnect the harness connector at the driver steering wheel air bag.
  3. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the driver steering wheel air bag. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  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 , reconnect the harness connector at the driver steering wheel air bag, and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the driver steering wheel air bag. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  5. Ignition OFF, disconnect special tool J 38715-A and adaptor. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  6. Disconnect the in-line harness connector at the steering wheel module coil.
  7. With the appropriate load tool adaptor, connect special tool J 38715-A . See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  8. Ignition ON, with a scan tool, verify DTC is set as current. If DTC is not set or is set as history, replace the steering wheel module coil.
  9. Ignition OFF, disconnect special tool J 38715-A and adaptor. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  10. 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 A1 X250 Steering wheel module coil connector Stage 2 terminal B1 X250 If greater than the specified range, test the circuit for a short to voltage.
  11. Test for less than 1 volt between the appropriate low control circuit listed below and ground: Steering wheel module coil connector Stage 1 terminal A2 X250 Steering wheel module coil connector Stage 2 terminal B2 X250 If greater than the specified range, test the circuit for a short to voltage.
  12. Ignition OFF, test for infinite resistance between the appropriate high control circuit listed below and ground: Steering wheel module coil connector Stage 1 terminal A1 X207 Steering wheel module coil connector Stage 2 terminal B1 X207 If not the specified value, test the circuit for a short to ground.
  13. Test for infinite resistance between the appropriate low control circuit listed below and ground: Steering wheel module coil connector Stage 1 terminal A2 X207 Steering wheel module coil connector Stage 2 terminal B2 X207 If not the specified value, test the circuit for a short to ground.
  14. Disconnect the harness connector at the SDM.
  15. Test for less than 1 ohm between the appropriate high control circuit terminals listed below: Steering wheel module coil harness connector Stage 1 terminal A1 X250 and SDM terminal 9 Steering wheel module coil harness connector Stage 2 terminal B1 X250 and SDM terminal 5 If greater than the specified range, test the circuit for an open/high resistance.
  16. Test for less than 1 ohm between the appropriate low control circuit terminals listed below: Steering wheel module coil connector Stage 1 terminal A2 X250 and SDM terminal 8 Steering wheel module coil connector Stage 2 terminal B2 X250 and SDM terminal 4 If greater than the specified range, test the circuit for an open/high resistance.
  17. If all circuits test normal, replace the SDM.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Steering Wheel Inflatable Restraint Module Replacement»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Steering Wheel Inflatable Restraint Module Coil Replacement (Coil)»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  3. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundLow ResistanceHigh ResistanceOpenShort to Voltage
Driver Seat Side Air Bag High ControlB0014 02B0014 0EB0014 0DB0014 04B0014 01
Driver Seat Side Air Bag Low ControlB0014 02B0014 0EB0014 0DB0014 04B0014 01
Driver Seat Belt Retractor Pretensioner High ControlB0015 02B0015 0EB0015 0DB0015 04B0015 01
Driver Seat Belt Retractor Pretensioner Low ControlB0015 02B0015 0EB0015 0DB0015 04B0015 01
Left Roof Rail Air Bag High ControlB0016 02B0016 0EB0016 0DB0016 04B0016 01
Left Roof Rail Air Bag Low ControlB0016 02B0016 0EB0016 0DB0016 04B0016 01
Passenger Instrument Panel Air Bag Stage 1 High ControlB0019 02B0019 0EB0019 0DB0019 04B0019 01
Passenger Instrument Panel Air Bag Stage 1 Low ControlB0019 02B0019 0EB0019 0DB0019 04B0019 01
Passenger Instrument Panel Air Bag Stage 2 High ControlB0020 02B0020 0EB0020 0DB0020 04B0020 01
Passenger Instrument Panel Air Bag Stage 2 Low ControlB0020 02B0020 0EB0020 0DB0020 04B0020 01
Passenger Seat Side Air Bag High ControlB0021 02B0021 0EB0021 0DB0021 04B0021 01
Passenger Seat Side Air Bag Low ControlB0021 02B0021 0EB0021 0DB0021 04B0021 01
Passenger Seat Belt Retractor Pretensioner High ControlB0022 02B0022 0EB0022 0DB0022 04B0022 01
Passenger Seat Belt Retractor Pretensioner Low ControlB0022 02B0022 0EB0022 0DB0022 04B0022 01
Right Roof Rail Air Bag High ControlB0023 02B0023 0EB0023 0DB0023 04B0023 01
Right Roof Rail Air Bag Low ControlB0023 02B0023 0EB0023 0DB0023 04B0023 01

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 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, if an event occurs 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

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  4. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/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 inflatable restraint module requires a specific adapter to connect the load tool to the SIR system.

J 38715-A Driver and Passenger SIR Load Tool. See Special Tools .

Note. Refer to SIR Service Precautions . When removing connectors inspect for damage or corrosion. Damage or corrosion in 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. Ignition OFF, disconnect the harness connector at the appropriate air bag or pretensioner.
  2. With the appropriate adaptor, connect J 38715-A in place of the air bag or pretensioner. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  3. Ignition ON, with a scan tool, verify DTC is set as current. If DTC is not set or is set as history, replace the appropriate air bag or pretensioner.
  4. Ignition OFF, disconnect J 38715-A and the appropriate adaptor. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  5. Disconnect the harness connector at the SDM.
  6. Ignition ON, test for less than 1 V between the high control circuit and ground. Passenger instrument panel air bag Stage 1 terminal 1 X1 Passenger instrument panel air bag Stage 2 terminal 1 X2 Left roof rail air bag terminal 1 Right roof rail air bag terminal 1 Driver seat side air bag terminal 2 Passenger seat side air bag terminal 2 Driver seat belt retractor pretensioner terminal A Passenger seat belt retractor pretensioner terminal A If not the specified range, test the circuit for a short to voltage.
  7. Test for less than 1 V between the following low control circuit terminal and ground. Passenger instrument panel air bag Stage 1 terminal 2 X1 Passenger instrument panel air bag Stage 2 terminal 2 X2 Left roof rail air bag terminal 2 Right roof rail air bag terminal 2 Driver seat side air bag terminal 1 Passenger seat side air bag terminal 1 Driver seat belt retractor pretensioner terminal B Passenger seat belt retractor pretensioner terminal B If not the specified range, test the circuit for a short to voltage.
  8. Ignition OFF, test for infinite resistance between the following high control circuit terminal and ground. Passenger instrument panel air bag Stage 1 terminal 1 X1 Passenger instrument panel air bag Stage 2 terminal 1 X2 Left roof rail air bag terminal 1 Right roof rail air bag terminal 1 Driver seat side air bag terminal 2 Passenger seat side air bag terminal 2 Driver seat belt retractor pretensioner terminal A Passenger seat belt retractor pretensioner terminal A If not the specified range, test the circuit for a short to ground.
  9. Test for infinite resistance between the following low control circuit terminal and ground. Passenger instrument panel air bag Stage 1 terminal 2 X1 Passenger instrument panel air bag Stage 2 terminal 2 X2 Left roof rail air bag terminal 2 Right roof rail air bag terminal 2 Driver seat side air bag terminal 1 Passenger seat side air bag terminal 1 Driver seat belt retractor pretensioner terminal B Passenger seat belt retractor pretensioner terminal B If not the specified range, test the circuit for a short to ground.
  10. Test for less than 1 ohms between the following high control circuit terminals. Passenger instrument panel air bag Stage 1 terminal 1 X1 and SDM terminal 10 Passenger instrument panel air bag Stage 2 terminal 1 X2 and SDM terminal 6 Left roof rail air bag terminal 1 and SDM terminal 13 Right roof rail air bag terminal 1 and SDM terminal 14 Driver seat side air bag terminal 2 and SDM terminal 21 Passenger seat side air bag terminal 2 and SDM terminal 22 Driver seat belt retractor pretensioner terminal A and SDM terminal 17 Passenger seat belt retractor pretensioner terminal A and SDM terminal 18 If not the specified range, test the circuit for an open/high resistance.
  11. Test for less than 1 ohms between the following low control circuit terminals. Passenger instrument panel air bag Stage 1 terminal 2 X1 and SDM terminal 11 Passenger instrument panel air bag Stage 2 terminal 2 X2 and SDM terminal 7 Left roof rail air bag terminal 2 and SDM terminal 12 Right roof rail air bag terminal 2 and SDM terminal 15 Driver seat side air bag terminal 1 and SDM terminal 20 Passenger seat side air bag terminal 1 and SDM terminal 23 Driver seat belt retractor pretensioner terminal B and SDM terminal 16 Passenger seat belt retractor pretensioner terminal B and SDM terminal 19 If not the specified range, test the circuit for an open/high resistance.
  12. If all circuits test normal, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Instrument Panel Inflatable Restraint Module Replacement (Impala)»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Roof Side Rail Inflatable Restraint Module Replacement»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  3. «Seat Belt Retractor Pretensioner Replacement - Front»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  4. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  5. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provide an overview of each diagnostic category.
CircuitShort to GroundLow ResistanceHigh ResistanceOpenShort to Voltage
Driver Seat Belt Anchor Pretensioner Low ControlB001A 02B001A 0EB001A 0DB001A 04B001A 01
Driver Seat Belt Anchor Pretensioner High ControlB001A 02B001A 0EB001A 0DB001A 04B001A 01
Passenger Seat Belt Anchor Pretensioner High ControlB001B 02B001B 0EB001B 0DB001B 04B001B 01
Passenger Seat Belt Anchor Pretensioner Low ControlB001B 02B001B 0EB001B 0DB001B 04B001B 01

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 driver or passenger seat belt anchor 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 driver or passenger seat belt anchor pretensioner connector which will short together both seat belt anchor pretensioner 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.

B001A 01, B001B 01

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

B001A 02, B001B 02

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

B001A 04, B001B 04

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

B001A 0D, B001B 0D

The anchor pretensioner deployment loop resistance is more than 3.9 ohms for 120 milliseconds.

B001A 0E, B001B 0E

The anchor 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

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/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 inflatable restraint module requires a specific adapter to connect the load tool to the SIR system.

J 38715-A Driver and Passenger SIR Load Tool. See Special Tools .

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 anchor pretensioner SDM Seat belt anchor pretensioner 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 seat belt anchor 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 seat belt anchor pretensioner.
  3. Connect the load tool adaptor J 38715-A in place of the seat belt anchor pretensioner. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  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 anchor pretensioner, and cycle the ignition ON. If the DTC resets after reconnecting the seat belt anchor pretensioner, replace the seat belt anchor pretensioner.
  5. Ignition OFF, disconnect the load tool and the adapter.
  6. Disconnect the harness connector at the SDM.
  7. Ignition ON, test for less than 1.0 V between the low control circuit terminal 24 (Driver) or terminal 27 (Passenger) 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 25 (Driver) or terminal 26 (Passenger) 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 24 (Driver) or terminal 27 (Passenger) 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 25 (Driver) or terminal 26 (Passenger) 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 24 (Driver) or terminal 2 and the SDM terminal 27 (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 25 (Driver) or terminal 1 and the SDM terminal 26 (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. «Driver or Passenger Seat Belt Tensioner Replacement»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__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

  1. Deploying the air bags and/or pretensioners causing DTC B0052 to set.
  2. Deploying the side air bags causing DTC B0055 to set with no faults present.

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.

B0053 00

SDM commands air bag deployment with loop faults present.

B0055 00

  1. The SDM detects a frontal impact of sufficient force to warrant deployment of the 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.
  1. The SDM will only set DTC B0052, or DTC B0055, or the SDM sets DTC B0053 along with DTC B0052.
  2. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG warning lamp.
  3. 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.
  3. DTC B0055 is a latched code and cannot be cleared.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  4. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/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

IMPORTANTThe 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.
  1. Verify DTC B0053 is not set. If DTC B0053 is set along with additional DTCs, other than B0052, repair the malfunction causing the DTCs before replacing the SDM.
  2. Verify DTC B0052 is not set. If DTC B0052 is set, clear DTCs. If the DTC sets, replace the SDM.
  3. Verify DTC B0055 is not set. If DTC B0055 is set, replace 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»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the passenger presence system (PPS) and the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. The PPS is used to monitor the weight of an occupant in the front passenger seat. If the pressure from the occupant's weight is less than a specified value or an empty seat is detected, the PPS module will send a suppress signal to the SDM to disable the passenger instrument panel air bag. When the PPS detects a fault within itself, then the PPS will communicate to the SDM through serial data communications that a PPS fault is present. The SDM will suppress the deployment of the module and then illuminate the AIR BAG indicator.

DTC B0056 sets because the PPS commanded to suppress the passenger instrument panel air bag when the vehicle was involved in a collision and the SDM has commanded an air bag deployment.

DTC B0057 sets because the PPS commanded to suppress the passenger seat side air bag when the vehicle was involved in a collision and the SDM has commanded an air bag deployment.

DTC B0058 sets because the PPS commanded to suppress the passenger seat belt pretensioners when the vehicle was involved in a collision and the SDM has commanded an air bag deployment.

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

This DTC sets when the SDM has commanded an air bag deployment while the PPS has determined that the front passenger seat has one the following conditions

  1. The pressure from the occupant's weight is less than a specified value. The PPS module sent a suppress signal to the SDM to suppress the passenger instrument panel air bag.
  2. Empty front passenger seat
  3. A PPS fault was detected
  1. DTC B0056 and B0058 will only set if there is a child seated or the passenger seat is empty.
  2. DTC B0052, B0053, or B0055 will set along with this DTC.
  3. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.

Any of the codes will set along with one of the following latched codes: DTC B0052, B0053, or B0055 and cannot be cleared.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  4. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/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

  1. Ignition OFF, verify that the vehicle does not show any signs of air bag or pretensioner deployment. If the vehicle displays any signs of deployment, refer to «Repairs and Inspections Required After a Collision»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  2. Verify DTC B0052, B0053, or B0055 is not set. If DTC is set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
  3. Clear DTCs. Verify DTC B0056, B0057, or B0058 is not set. If DTC is set, 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»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__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, 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

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/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. 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, setup, and programming

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__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 (SDM) performs tests to diagnose critical malfunctions within itself. When the SDM has completed the power-up mode, the SDM will establish communication with the passenger presence module. The SDM will also request the instrument panel cluster to illuminate both of the PASSENGER AIR BAG ON/OFF indicators. If the SDM detects that the passenger presence module has set a current DTC, the SDM 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 0F

  1. The SDM has received a fault present message from the passenger presence module.
  2. The passenger presence module is in assembly plant mode and the SDM is in production mode.

B0081 11

The passenger presence module is above maximum threshold. The passenger presence module failed the preload/build check.

B0081 3A

The SDM 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/build check test not run.

B0081 5A

The passenger presence module detects a plausibility error.

B0081 71

The SDM has received invalid or no serial data from the passenger presence module.

  1. The SDM 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 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, 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

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/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 no passenger presence module DTCs are set. If any passenger presence module DTCs are set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) .
  2. Verify that DTC B0081 3A is not set. If DTC B0081 3A is set, verify that the correct passenger presence module is installed. If the incorrect passenger presence module is installed, replace with the correct part number.
  3. Verify that DTC B0081 4B is not set. If DTC B0081 4B is set, refer to «Passenger Presence System Preload Test»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system__passenger-presence-system-preload-test)
  4. Verify that DTC B0081 11 is not set. If DTC B0081 11 sets, perform the preload test. If the preload test fails, repeat the test. Refer to «Passenger Presence System Preload Test»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system__passenger-presence-system-preload-test) .
  5. Verify that DTC B1325 is not set. If DTC B1325 is set, refer to «DTC B1325, B1330, B1420, B1424, B1517, C0800, C0895, C0899, C0900, P0560, P0562, or P0563»(/chevrolet/impala/ix-2006-2016/remont/charging-system/#battery-charging-system-and-starting-system)

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 SDM Passenger presence module harness connector SDM 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 PPS components and perform the «Passenger Presence System Preload Test»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system__passenger-presence-system-preload-test) .
  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 diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  2. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for passenger presence system and SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Left Front Impact Sensor High SignalB0083 02B0083 0FB0083 05B0083 01, B0083 05B0083 0F
Left Front Impact Sensor Low ReferenceB0083 02B0083 0FB0083 05B0083 01, B0083 05B0083 0F
Right Front Impact Sensor High SignalB0084 02B0084 0FB0084 05B0084 01, B0084 05B0084 0F
Right Front Impact Sensor Low ReferenceB0084 02B0084 0FB0084 05B0084 01, B0084 05B0084 0F
Left Front Side Impact Sensor High SignalB0085 02B0085 0FB0085 05B0085 01, B0085 05B0085 0F
Left Front Side Impact Low ReferenceB0085 02B0085 0FB0085 05B0085 01, B0085 05B0085 0F
Right Front Side Impact Sensor High SignalB0086 02B0086 0FB0086 05B0086 01, B0086 05B0086 0F
Right Front Side Impact Low ReferenceB0086 02B0086 0FB0086 05B0086 01, B0086 05B0086 0F

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

Ignition voltage is between 9-16 volts.

Any of the following conditions exist for 2.5 seconds

B0083 01, B0084 01, B0085 01, B0086 01

The impact sensor has been shorted to voltage.

B0083 02, B0084 02, B0085 02, B0086 02

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

B0083 05 or B0084 05, B0085 05, B0086 05

  1. The impact sensor has been shorted to voltage.
  2. The impact sensor circuit is open.
  3. The SDM has not received a message from the impact sensor for greater than 375 milliseconds.

B0083 0F, B0084 0F, B0085 0F, B0086 0F

The SDM has received erratic messages from the impact sensor.

B0083 39, B0084 39, B0085 39, B0086 39

  1. The SDM has received a Not OK (NOK) message from the impact sensor.
  2. The SDM has not received a message.

B0083 3A, B0084 3A, B0085 3A, B0086 3A

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

B0083 71, B0084 71, B0085 71, B0086 71

The SDM has received invalid serial data from the impact sensor.

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

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/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

IMPORTANTRefer to SIR Service Precautions . When removing connectors, inspect for damage or corrosion. 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
  1. Ignition OFF, disconnect the harness connector at the SDM and the appropriate impact sensor.
  2. Ignition ON, test for less than 1 volt between the signal circuit of the impact sensor terminal B and ground. If greater than the specified range, test the circuit for a short to voltage.
  3. Ignition ON, test for less than 1 volt between the low reference circuit of the impact sensor terminal A and ground. If greater than the specified range, test the circuit for a short to voltage.
  4. Test for infinite resistance between the signal circuit terminal B and ground. If less than infinite resistance, test the circuit for a short to ground.
  5. Test for less than 1 ohm between the following signal circuit terminals. Left front impact sensor terminal B and SDM harness connector terminal 36. Right front impact sensor terminal B and SDM harness connector terminal 37. Left front side impact sensor terminal B and the SDM harness connector terminal 42. Right front side impact sensor terminal B and the SDM harness connector terminal 43. If greater than the specified range, test the circuit for an open/high resistance.
  6. Test for less then 1 ohm between the following low reference circuit terminals. Left front impact sensor terminal A and SDM harness connector terminal 38. Right front impact sensor terminal A and SDM harness connector terminal 39. Left front side impact sensor terminal A and the SDM harness connector terminal 40. Right front side impact sensor terminal A and the SDM harness connector terminal 41. If greater than the specified range, test the circuit for an open/high resistance.
  7. If all circuits test normal, replace the appropriate impact sensor.
  8. Reconnect all SIR components. Ignition ON, verify the DTC does not set as current. If the DTC resets as current, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Front End Sensor Replacement»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Inflatable Restraint Side Impact Sensor Replacement (Impala)»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  3. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__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. If there is a mismatch between the information stored in the SDM and BCM, DTC B1001 will set.

Ignition voltage is between 9-16 volts.

  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 does not match that of the vehicle.
  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 that is stored in the SDM matches the VIN stored in the BCM.

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

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)

Scan Tool Reference

Control Module References for scan tool information.

IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected. SDM SDM wiring harness
  1. 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. If the VIN matches, reprogram the SDM.
  2. Ignition ON, verify the scan tool Primary Key Status 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.
  3. With a scan tool, verify DTC B1001 is not set as current. If DTC is set as current, replace the SDM.

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»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__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

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)

Scan Tool Reference

Control Module References for scan tool information

IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected. PPS module PPS module wiring harness
  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»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__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 module. 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 illuminate 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 volts.

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 all the PPS indicators are present due to loss of power at indicator, or an open indicator control circuit.
  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.
  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 «Seat Belt System Description and Operation»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system) , and «SIR System Description and Operation»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  1. 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.
  2. DTC B1019 3A can be set if any of the passenger air bag ON/OFF indicators, including the passenger seat belt buckle indicator are inoperative.

Schematic Reference

  1. «Seat Belt Schematics»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system)
  2. «SIR Schematics»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)

Connector End View Reference

Description and Operation

  1. «Seat Belt System Description and Operation»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system)
  2. «SIR System Description and Operation»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/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 B1370 is not set as current in the SDM. If DTC is current refer to «DTC B1370»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  2. If equipped with PPS, verify the appropriate PPS indicator segments illuminate by occupying and unoccupying the passenger seat. If the PPS indicator segments do not illuminate properly, refer to «Seat Belt Indicator Circuit Malfunction - Passenger»(/chevrolet/impala/ix-2006-2016/remont/restraints-control-systems/#seat-belt-system) .
IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected. PPS module SDM PPS module wiring harness connector SDM wiring harness connector

B1019 00

  1. Ignition ON, verify the scan tool SDM 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 module and SDM DTCs.
  7. Verify DTC B1019 does not set. If DTC sets, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  2. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS module or SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using the diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) monitors the ignition 1 signal from the ignition switch. When the vehicle ignition switch is placed in the RUN or CRANK position, the switch supplies voltage to the SDM ignition 1 input terminal. If an open or short to ground in this SDM ignition 1 circuit is detected, then DTC B1370 will set.

Ignition voltage is between 9-16 volts.

The SDM detects a short to ground or an open in the ignition 1 voltage circuit for at least 10 seconds when the ignition switch is in RUN or CRANK.

  1. The SDM requests the instrument panel cluster (IPC) to illuminate the AIR BAG indicator.
  2. The SDM determines its power mode only from the GMLAN power mode messages and discards the ignition 1 input for the remainder of the ignition cycle.
  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

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  3. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
  4. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/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

IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected. SDM SDM wiring harness
  1. Ignition OFF, remove the AIRBAG/DISPLAY fuse.
  2. Ignition ON, with a DMM, test for 9-16 V between the voltage supply side and ground. If not the specified range, refer to «DTC B1370-B1379, B1380-B1389, or B1440-B1443»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures) .
  3. Ignition OFF, disconnect the harness connector at the SDM.
  4. Ignition OFF, disconnect the X4 harness connector at the Underhood Fuse Block.
  5. Ignition OFF, test for less than 1 ohm between the ignition 1 voltage circuit terminal 32 and the underhood fuse block terminal K4 X4. If greater then the specified range, test the circuit for an open/high resistance.
  6. Ignition ON, test for less than 1 volt between the ignition 1 voltage circuit terminal 32 and the underhood fuse block K4 X4. If greater then the specified value, test the circuit for a short to voltage.
  7. If all circuits test normal, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  2. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming

Passenger Presence System Preload Test

The passenger presence system consists of an electronic control module, a conductive based sensor mat, wiring harness, and PASSENGER AIR BAG ON/OFF indicators. The sensor mat is made up of several flexible conductive metal strips placed underneath the seat cushion trim. These sensor strips transmit and receive a low level electric field. The weight of the occupant sitting in the front passenger seat is measured as a change in current flow within the sensor mat. If the passenger seat bottom cushion, seat bottom trim, or heater pad has been serviced, reinstalled, or removed for any reason, the procedure below will check for any preloads on the passenger presence system. A service replacement passenger presence module does not require an unlock procedure prior to an initial preload test.

Passenger Presence System Preload System Test

Note. Before the passenger presence system can be checked for preloads the front passenger seat must be completely empty of all items. The presence of any items on the front passenger seat will affect the calibration and operation of the passenger presence system. When the preload test is performed, the instrument cluster and dash lights will begin illuminating at varying intensity. This is normal operation during the Passenger Presence Sensor Learn procedure and does not indicate additional system faults. The Diagnostic System Check - Vehicle must be performed after successfully completing the preload test procedure to ensure the system is functioning properly.

  1. Empty the front passenger seat, this system is susceptible to conductive material.
  2. With the scan tool, perform the Passenger Presence Sensor Learn procedure.
  3. Using the scan tool, check for DTC B0081 in history. If the Passenger Presence Sensor Learn procedure fails or DTC B0081 is current, confirm that there is no conductive material on the seat. Perform the Passenger Presence Sensor Learn test again. If the test fails again, for heated seats, ensure that the sensor pad is on top of the heater element. Once the test successfully completes, cycle the ignition OFF.
  4. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) after successfully completing the Passenger Presence Sensor Learn procedure to ensure the system is functioning properly.

Symptoms - SIR

IMPORTANTComplete the following steps before using the symptom tables
  1. Perform «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) 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»(/chevrolet/impala/ix-2006-2016/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»(/chevrolet/impala/ix-2006-2016/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

  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the instrument panel cluster (IPC) flashes the air bag indicator 7 times 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. If a preexisting malfunction exists, the air bag indicator will illuminate steady immediately after the ignition is turned ON. If the ignition 1 voltage is outside of the normal operating voltage range 9-16 volts, the SDM will command the IPC to illuminate the air bag indicator with no DTCs present, then disables all deployment loops.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/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

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

  1. Ignition ON, with a scan tool, verify the Battery Voltage Parameter is 9-16 volts. If not the specified range, refer to «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) .
  2. Ignition OFF, monitor the IPC, ignition ON. The SIR warning indicator should flash then turn OFF. If the SIR warning indicator continually flashes, program the SDM. If the SIR warning indicator remains on steady, test for DTCs and refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) . If no DTC is current, proceed to the next step.
  3. With a scan tool, 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.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  2. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for IPC or SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to Voltage
Ignition 1 Voltage11*1
Passenger Air Bag OFF Indicator Control42*2
Passenger Air Bag ON Indicator Control53*3
1. No indicators will illuminate. 2. The OFF indicator will not illuminate. 3. The ON indicator will not illuminate. 4. The OFF indictor will illuminate any time the ignition is ON. 5. The ON indictor will illuminate any time the ignition is ON. * High resistance may cause any or all indicators to illuminate less bright than normal.

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 passenger presence module. The passenger presence module communicates with the SDM indicating if the passenger seat is occupied or not. The IPC receives serial data messages from the SDM to illuminate the appropriate passenger instrument panel air bag indicator. The instrument panel cluster (IPC) grounds the appropriate indicator control circuit to the passenger air bag ON or OFF indicator for illumination.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
  2. «Connector Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  4. «Wiring Repairs»(/chevrolet/impala/ix-2006-2016/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, the passenger air bag ON and OFF indicators should both illuminate for approximately 5 seconds for a bulb check.
  2. Monitor the parameter Passenger Classification in Passenger Presence System with a scan tool. With the passenger seat unoccupied, the parameter should display Empty Seat. The passenger air bag OFF indicator should illuminate.
  3. Have an adult sit in the passenger seat. The passenger air bag indicator should switch from OFF to ON within 5 seconds.

Note. When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected. Passenger air bag on/off indicator. Passenger air bag on/off indicator wiring harness.

  1. Ignition OFF, disconnect the harness connector at the inflatable restraint passenger air bag ON/OFF indicator.
  2. 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. If the circuit tests normal and the ignition circuit fuse is open, test or replace the inflatable restraint passenger air bag ON/OFF indicator.
  3. Connect a test lamp between the ignition circuit terminal 4 and the control circuit terminal 3.
  4. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds. If the test lamp is always on, test the control circuit for a short to ground. If the circuit tests normal replace the IPC. If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the IPC.
  5. Connect a test lamp between the ignition circuit terminal 4 and the control circuit terminal 1.
  6. With the passenger seat unoccupied, then occupied the test lamp should switch states within 5 seconds. If the test lamp is always on, test the control circuit for a short to ground. If the circuit tests normal replace the IPC. If the test lamp is always off, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal replace the IPC.
  7. If all circuits test normal, replace the inflatable restraint passenger air bag ON/OFF indicator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/chevrolet/impala/ix-2006-2016/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-diagnostic-information-and-procedures)
  2. «Inflatable Restraint Instrument Panel Module Indicator Replacement»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system)
  3. «Control Module References»(/chevrolet/impala/ix-2006-2016/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for instrument panel cluster (IPC) 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.

ConditionAction
If the vehicle was involved in an accident with an air bag deployment.Disconnect the negative battery cable(s) *. Refer to Repairs and Inspections Required After a Collision .
When performing SIR diagnostics.Follow the appropriate SIR service manual diagnostic procedure(s) *
When moving, removing or replacing an SIR component or a component attached to an SIR component. (Anytime you remove fasteners.)Disconnect the negative battery cable(s) *
If the vehicle is suspected of having shorted electrical wires.Disconnect the negative battery cable(s) *
When performing electrical diagnosis on components other than the SIR system.Remove the SIR/Airbag fuse(s) when indicated by the diagnostic procedure to disable the SIR system
* DTCs will be lost when the negative battery cable is disconnected.

SIR Service Precautions

WARNINGWhen performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Failure to observe the correct procedure could cause deployment of the SIR components. Serious injury can occur. Failure to observe the correct procedure could also result in unnecessary SIR system repairs.

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»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) or «Electrical Center Identification Views»(/chevrolet/impala/ix-2006-2016/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»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) or «Electrical Center Identification Views»(/chevrolet/impala/ix-2006-2016/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»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) .

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 (LGD/LZE)»(/chevrolet/impala/ix-2006-2016/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 (LGD/LZE)»(/chevrolet/impala/ix-2006-2016/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»(/chevrolet/impala/ix-2006-2016/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) .
WARNINGWhen performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs.

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

Scheme 5: Inflatable Restraint Front End Sensor Replacement
Scheme 5: Inflatable Restraint Front End Sensor Replacement
CalloutComponent Name
WARNING: Refer to SIR Warning . Preliminary Procedures Disable the supplemental inflatable restraint (SIR) system. Refer to SIR Disabling and Enabling . Remove the upper air baffle and deflector. Refer to Radiator Air Upper Baffle and Deflector Replacement . Remove both headlamps. Refer to Headlamp Replacement . Remove the fascia grille support bolts, 8 total. DO NOT remove the bumper fascia. Refer to Front Bumper Fascia Energy Absorber Replacement . Remove the retainers from fascia to grille support, 4 total. Pull the grille support forward to gain clearance to the sensors.
1Inflatable Front End Sensor Mounting Bolts (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 11 N.m (97 lb in)
2Connector Position Assurance (CPA) Connector
3Inflatable Front End Sensor
WARNING
Refer to SIR Warning .
CAUTION
Refer to Fastener Caution .

Scheme 6

Scheme 6: Inflatable Restraint Side Impact Sensor Replacement (Impala)
Scheme 6: Inflatable Restraint Side Impact Sensor Replacement (Impala)
CalloutComponent Name
WARNING: Do not strike or jolt the inflatable restraint side impact sensor (SIS). Before applying power to the SIS make sure that it is securely fastened. Failure to observe the correct installation procedures could cause SIR deployment, personal injury, or unnecessary SIR system repairs. WARNING: Refer to SIR Warning . Preliminary Procedure Disable the SIR system. Refer to SIR Disabling and Enabling . Remove the front door panel. Refer to Front Side Door Trim Panel Replacement .
1Inflatable Restraint Side Impact Sensor Assembly Bolt/Screw (Qty: 2) CAUTION: Refer to Fastener Caution . Tip: Loosen the fasteners and slide the sensor out of the keyhole slots. Tighten: 10 N.m (89 lb in)
2Inflatable Restraint Side Impact Sensor Assembly
WARNING
Do not strike or jolt the inflatable restraint side impact sensor (SIS). Before applying power to the SIS make sure that it is securely fastened. Failure to observe the correct installation procedures could cause SIR deployment, personal injury, or unnecessary SIR system repairs.
WARNING
Refer to SIR Warning .
CAUTION
Refer to Fastener Caution .

Scheme 7

Scheme 7: Inflatable Restraint Sensing and Diagnostic Module Replacement
Scheme 7: Inflatable Restraint Sensing and Diagnostic Module Replacement
CalloutComponent Name
WARNING: Do not strike or jolt the inflatable restraint sensing and diagnostic module (SDM). Before applying power to the SDM, make sure that it is securely fastened with the arrow facing toward the front of the vehicle. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs. WARNING: Refer to SIR Warning . Preliminary Procedure Disable the supplemental inflatable restraint (SIR) system. Refer to SIR Disabling and Enabling . Remove the right front seat. Refer to Front Seat Replacement - Bucket (Impala) . Pull the carpeting back in order to access the sensing and diagnostic module (SDM). Refer to Floor Panel Carpet Replacement (Impala) . Program the inflatable restraint SDM after replacement. Refer to Control Module References .
1Inflatable Restraint Sensing and Diagnostic Module Bolt/Screw (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (88 lb in)
2Inflatable Restraint Sensing and Diagnostic Module Assembly
WARNING
Do not strike or jolt the inflatable restraint sensing and diagnostic module (SDM). Before applying power to the SDM, make sure that it is securely fastened with the arrow facing toward the front of the vehicle. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs.
WARNING
Refer to SIR Warning .
CAUTION
Refer to Fastener Caution .

Scheme 8

Scheme 8: Steering Wheel Inflatable Restraint Module Replacement
Scheme 8: Steering Wheel Inflatable Restraint Module Replacement
CalloutComponent Name
WARNING: Refer to SIR Warning . WARNING: Refer to SIR Inflator Module Handling and Storage Warning . Preliminary Procedure: Disable the supplemental inflatable restraint (SIR) system. Refer to SIR Disabling and Enabling .
1Inflatable Restraint Steering Wheel Module Assembly Tip: Insert a small blunt-ended tool through the access openings, on the left and right of the steering wheel, push on the blunt-ended tool to release the steering wheel inflator from the steering wheel.
WARNING
Refer to SIR Warning .

Special Tools

J 42640 Steering Column Anti Rotation Pin. See Special Tools .

Removal Procedure

  1. Disable the SIR System. Refer to «SIR Disabling and Enabling»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .
  2. Verify the following before removing the SIR coil: The wheels on the vehicle are straight ahead. That J 42640 is installed or the ignition switch is in the LOCK position. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  3. Remove the steering wheel from the steering shaft. Refer to «Steering Wheel Replacement»(/chevrolet/impala/ix-2006-2016/remont/steering-column-switches/#steering-wheel-and-steering-column) .
  4. On vehicles with a tilt column, pull the tilt lever straight out from the steering column.
  5. Remove 2 TORX® head screws (1) from the lower trim cover (2).
  6. Remove the lower trim cover (2).
  7. Remove 2 TORX® head screws (2) from the upper trim cover (1).
  8. Remove the upper trim cover (1).
  9. Remove the wire harness straps from the steering wheel column wire harness.
  10. Remove the retaining ring (3).
  11. Remove the SIR coil (4) from the steering shaft.
  12. If replacing, discard the SIR coil.

Installation Procedure

  1. Verify the following: The wheels on the vehicle are straight ahead. That J 42640 is installed or the ignition switch is in the LOCK position. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  2. If reusing the existing coil it MUST be centered, refer to «Inflatable Restraint Steering Wheel Module Coil Centering»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system__inflatable-restraint-steering-wheel-module-coil) .
  3. Align the SIR coil assembly (1) with the horn tower on the turn signal cancel cam assembly (2).
  4. Slide the SIR coil (4) onto the steering shaft assembly (2).
  5. Firmly seat the retaining ring (3) into the groove on the steering shaft assembly (2).
  6. Remove and discard the centering tab from the new SIR coil (4).
  7. Install the upper trim cover (1) and secure by using 2 TORX® head screws (2). Tighten: Tighten the screws to 1.5 N.m (13 lb in).
  8. Install the lower trim cover (2) and secure by using 2 TORX® head screws (1).
  9. Verify that the tabs on the lower trim cover (1) engage with the tabs on the upper trim cover (2). Snap the tabs together. Tighten: Tighten the screws to 1.5 N.m (13 lb in).
  10. On vehicles with a tilt column, align the tilt lever into the steering column.
  11. Slide the tilt lever handle into the steering column until the handle locks into position.
  12. Install the steering wheel onto the steering shaft. Refer to «Steering Wheel Replacement»(/chevrolet/impala/ix-2006-2016/remont/steering-column-switches/#steering-wheel-and-steering-column) .
  13. Enable the SIR system. Refer to «SIR Disabling and Enabling»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system__sir-disabling-and-enabling) .

Inflatable Restraint Steering Wheel Module Coil Centering

  1. Verify the following conditions before centering the SIR coil: The wheels on the vehicle are straight ahead. The block tooth (1) of the steering shaft assembly is in the 12 o'clock position. The ignition switch is in the LOCK position.
  2. If the front (5) of the SIR coil has a centering window (4), and the back side (2) includes a spring service lock (1), perform the following steps: Hold the SIR coil with the face up. While depressing the spring service lock, rotate the coil hub clockwise until the coil ribbon stops. Rotate the coil hub slowly, counterclockwise, until the centering window appears yellow and both arrows (3) line up. Release spring service lock between the locking tab. The SIR coil is now centered. Align the centered SIR coil with the horn tower and slide onto the steering shaft assembly.
  3. If the front (4) of the SIR coil has a centering window (3), and the back side (1) includes NO spring service lock, perform the following steps: Hold the SIR coil with the face up. Rotate the coil hub clockwise until the coil ribbon stops. Rotate the coil hub slowly, counterclockwise until the centering window appears yellow and both arrows (2) line up. This is the CENTER position. While holding the coil hub in the CENTER position, align the SIR coil with the horn tower and slide onto the steering shaft assembly.
  4. If the front side (3) of the SIR coil has NO centering window, but the back side (2) includes a spring service lock (1), perform the following steps: Hold the SIR coil with the back side up. While depressing the spring service lock, rotate the coil hub in the direction of the arrow (4) until the coil ribbon stops. Still pressing the spring service lock, rotate the coil hub in the opposite direction 21/2 revolutions. Release the spring service lock between locking tabs. The SIR coil is now centered. Align the centered SIR coil with the horn tower and slide onto the steering shaft assembly.
  5. If the front side (2) of the SIR coil has NO centering window, and the back side (1) includes NO spring service lock, perform the following steps: Hold the SIR coil with the face up. Rotate the coil hub in the direction of the arrow until the coil ribbon stops. Rotate the coil hub, slowly, counterclockwise, for 21/2 revolutions. This is the CENTER position. While maintaining the coil hub in the CENTER position, align the centered SIR coil with the horn tower and slide onto the steering shaft assembly.
  6. If double wire harness strap is installed onto the wire harness assembly and column, you must route the wires up against the steering column. One wire harness strap will surround one lead from the coil to the steering column. The other wire harness strap will surround all leads to the steering column.

Scheme 9

Scheme 9: Instrument Panel Inflatable Restraint Module Replacement (Impala)
Scheme 9: Instrument Panel Inflatable Restraint Module Replacement (Impala)
CalloutComponent Name
WARNING: Refer to SIR Warning . WARNING: Refer to SIR Inflator Module Handling and Storage Warning . Preliminary Procedures Disable the SIR. Refer to SIR Disabling and Enabling . Remove the instrument panel (I/P) upper trim panel. Refer to Instrument Panel Upper Trim Pad Replacement .
1Inflatable Restraint I/P Module Bolts (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten: 10 N.m (89 lb in)
2Inflatable Restraint I/P Module Assembly
WARNING
Refer to SIR Warning .
CAUTION
Refer to Fastener Caution .

Scheme 10

Scheme 10: Inflatable Restraint Passenger Presence System Replacement - Front
Scheme 10: Inflatable Restraint Passenger Presence System Replacement - Front
CalloutComponent Name
Preliminary Procedure Remove the front seat. Refer to Front Seat Replacement - Bucket (Impala) . Remove the seat cushion cover. Refer to Front Seat Cushion Cover and Pad Replacement (Impala) .
1Inflatable Restraint Front Passenger Presence System Assembly WARNING: Replace the passenger presence system as a complete assembly to prevent possible injury to the occupant. All the components in the service kit are assembled and calibrated as a unit. Using only some of the components in the service kit will cause the passenger presence system to operate improperly. WARNING: To avoid personal injury, perform a preload test on the passenger presence system whenever you remove or replace the seat cushion trim. Failure to do so may cause the system to malfunction. Procedures Passenger Presence System Preload Test the inflatable restraint passenger presence system whenever the seat cushion or any component of the passenger presence system is removed. Refer to Passenger Presence System Preload Test Program the inflatable restraint passenger presence system after replacement. Refer to Control Module References . Tip: The passenger presence system is an integral part of the pad on the passenger seat cushion. The seat cushion heater is attached directly to the pad, then the sensor goes on top of the heater (if equipped). The sensor, module and seat cushion pad must be replaced as a unit. Note the routing of the wiring harness and connector location for installation.
WARNING
Replace the passenger presence system as a complete assembly to prevent possible injury to the occupant. All the components in the service kit are assembled and calibrated as a unit. Using only some of the components in the service kit will cause the passenger presence system to operate improperly.
WARNING
To avoid personal injury, perform a preload test on the passenger presence system whenever you remove or replace the seat cushion trim. Failure to do so may cause the system to malfunction.

Scheme 11

Scheme 11: Driver or Passenger Seat Side Inflatable Restraint Module Replacement
Scheme 11: Driver or Passenger Seat Side Inflatable Restraint Module Replacement
CalloutComponent Name
WARNING: Following the deployment of a side impact air bag, inspect the following parts for damage. Replace these parts if necessary: The seat cushion frame The seat recliner, if equipped The seat adjuster The seat back frame Failure to do so may cause future personal injury. WARNING: Do not strike or jolt the inflatable restraint side impact sensor (SIS). Before applying power to the SIS make sure that it is securely fastened. Failure to observe the correct installation procedures could cause SIR deployment, personal injury, or unnecessary SIR system repairs. Preliminary Procedure Disable the SIR system. Refer to SIR Disabling and Enabling . Remove the front seat. Refer to Front Seat Replacement - Bucket (Impala) . Remove the front seat back cushion finish panel. Refer to Driver or Passenger Seat Back Cushion Finish Panel Replacement (Impala) .
1Inflatable Restraint Front Seat Side Module Nut (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten: 3.5 N.m (31 lb in)
2Inflatable Restraint Front Seat Side Module Procedure Remove the connector position assurance (CPA) from the module electrical connector. Disconnect the electrical connector. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to Inflatable Restraint Module Handling and Scrapping .
WARNING
Following the deployment of a side impact air bag, inspect the following parts for damage. Replace these parts if necessary: The seat cushion frame The seat recliner, if equipped The seat adjuster The seat back frame Failure to do so may cause future personal injury.
WARNING
Do not strike or jolt the inflatable restraint side impact sensor (SIS). Before applying power to the SIS make sure that it is securely fastened. Failure to observe the correct installation procedures could cause SIR deployment, personal injury, or unnecessary SIR system repairs.
CAUTION
Refer to Fastener Caution .

Scheme 12

Scheme 12: Inflatable Restraint Instrument Panel Module Indicator Replacement
Scheme 12: Inflatable Restraint Instrument Panel Module Indicator Replacement
CalloutComponent Name
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedure Remove the instrument panel accessory trim panel. Refer to Instrument Panel Accessory Trim Plate Replacement .
1Indicator Assembly, Inflatable Restraint Instrument Panel Module

Scheme 13

Scheme 13: Roof Side Rail Inflatable Restraint Module Replacement
Scheme 13: Roof Side Rail Inflatable Restraint Module Replacement
CalloutComponent Name
WARNING: In order to prevent SIR deployment, personal injury, or unnecessary SIR system repairs, do not strike the door or the door pillar in the area of the side impact sensor (SIS). Turn OFF the ignition and remove the key when performing service in the area of the SIS. WARNING: When installing the roof rail airbag, do not twist or turn the airbag 360 degrees. Securing the roof rail airbag with an airbag twisted or turned 360 degrees may cause the airbag not to deploy correctly and could cause personal injury. WARNING: Refer to SIR Warning . WARNING: Refer to SIR Inflator Module Handling and Storage Warning . Preliminary Procedures Disable the SIR system. Refer to SIR Disabling and Enabling . Remove the windshield pillar garnish molding. Refer to Windshield Pillar Garnish Molding Replacement . Remove the center pillar trim. Refer to Center Pillar Upper Trim Panel Replacement . Remove the rear quarter upper trim panel. Refer to Quarter Upper Trim Panel Replacement . Remove the assist handles. Refer to Assist Handle Replacement . Lower the side of the headliner. Refer to Headlining Trim Panel Replacement .
1Inflatable Restraint Roof Side Rail Bolt CAUTION: Refer to Fastener Caution . Tighten: 9 N.m (80 lb in)
2Inflatable Restraint Roof Side Rail Module Assembly
3Assist Handle Bracket Assembly
WARNING
In order to prevent SIR deployment, personal injury, or unnecessary SIR system repairs, do not strike the door or the door pillar in the area of the side impact sensor (SIS). Turn OFF the ignition and remove the key when performing service in the area of the SIS.
WARNING
When installing the roof rail airbag, do not twist or turn the airbag 360 degrees. Securing the roof rail airbag with an airbag twisted or turned 360 degrees may cause the airbag not to deploy correctly and could cause personal injury.
WARNING
Refer to SIR Warning .
CAUTION
Refer to Fastener Caution .

Scheme 14

Scheme 14: Driver or Passenger Seat Belt Tensioner Replacement
Scheme 14: Driver or Passenger Seat Belt Tensioner Replacement
CalloutComponent Name
WARNING: Refer to SIR Warning . WARNING: In order to prevent accidental deployment and the risk of personal injury, do not dispose of an undeployed inflatable restraint seat belt pretensioner as normal shop waste. Undeployed seat belt pretensioners contain substances that could cause severe illness or personal injury if their sealed containers are damaged during disposal. Use the following deployment procedures to safely dispose of an undeployed seat belt pretensioner. Failure to observe the following disposal methods may be a violation of federal, state, or local laws. WARNING: When carrying an undeployed inflatable restraint seat belt pretensioner: Do not carry the seat belt pretensioner by the wires or connector. Carry the seat belt pretensioner by the piston tube, keeping hands and fingers away from the cable. Make sure the open end of the seat belt pretensioner piston tube points away from you and other people. Do not cover the seat belt pretensioner piston tube opening with your hand. Failure to observe these guidelines may result in personal injury. Preliminary Procedures Move the front seat all the way forward. Disable the SIR. Refer to SIR Disabling and Enabling . Remove the seat cushion outer trim panel. Refer to Seat Cushion Outer Trim Panel Replacement .
1Tensioner (Anchor Side) Bolt/Screw CAUTION: Refer to Fastener Caution . Procedure Unsnap the upper sleeve from the linkage cover and slide down. Remove the linkage screw by loosening the screw, push the screw through the hole using the small access hole on the opposite side of the linkage cover. Pull the linkage plate from the linkage cover. If the screw does not come out, the cover halves can be separated with a flat-head screwdriver to access and hold the nut. Tighten: 6 N.m (53 lb in)
2Pretensioner Cover
3Seat Shoulder Belt Anchor Nut Tighten: 42 N.m (31 lb ft)
4Seat Belt (Anchor Side) Tensioner Assembly Tip: The tensioner is on the opposite side of the seat from the buckle.
WARNING
Refer to SIR Warning .
WARNING
In order to prevent accidental deployment and the risk of personal injury, do not dispose of an undeployed inflatable restraint seat belt pretensioner as normal shop waste. Undeployed seat belt pretensioners contain substances that could cause severe illness or personal injury if their sealed containers are damaged during disposal. Use the following deployment procedures to safely dispose of an undeployed seat belt pretensioner. Failure to observe the following disposal methods may be a violation of federal, state, or local laws.
WARNING
When carrying an undeployed inflatable restraint seat belt pretensioner: Do not carry the seat belt pretensioner by the wires or connector. Carry the seat belt pretensioner by the piston tube, keeping hands and fingers away from the cable. Make sure the open end of the seat belt pretensioner piston tube points away from you and other people. Do not cover the seat belt pretensioner piston tube opening with your hand. Failure to observe these guidelines may result in personal injury.
CAUTION
Refer to Fastener Caution .

Scheme 15

Scheme 15: Seat Belt Retractor Pretensioner Replacement - Front
Scheme 15: Seat Belt Retractor Pretensioner Replacement - Front
CalloutComponent Name
WARNING: Refer to SIR Warning . WARNING: In order to prevent accidental deployment and the risk of personal injury, do not dispose of an undeployed inflatable restraint seat belt pretensioner as normal shop waste. Undeployed seat belt pretensioners contain substances that could cause severe illness or personal injury if their sealed containers are damaged during disposal. Use the following deployment procedures to safely dispose of an undeployed seat belt pretensioner. Failure to observe the following disposal methods may be a violation of federal, state, or local laws. WARNING: When carrying an undeployed inflatable restraint seat belt pretensioner: Do not carry the seat belt pretensioner by the wires or connector. Carry the seat belt pretensioner by the piston tube, keeping hands and fingers away from the cable. Make sure the open end of the seat belt pretensioner piston tube points away from you and other people. Do not cover the seat belt pretensioner piston tube opening with your hand. Failure to observe these guidelines may result in personal injury. Preliminary Procedures Move the front seat all the way forward. Disable the SIR. Refer to SIR Disabling and Enabling . Remove the lower center pillar trim. Refer to Center Pillar Lower Trim Panel Replacement .
1Belt Tensioner (Retractor Side) Bolt/Screw CAUTION: Refer to Fastener Caution . Procedure Unsnap the upper sleeve from the linkage cover and slide down. Remove the linkage screw by loosening the screw, push the screw through the hole using the small access hole on the opposite side of the linkage cover. Pull the linkage plate from the linkage covers. Tighten: 6 N.m (53 lb in)
2Seat Shoulder Belt Guide Cover
3Seat Shoulder Belt Guide Bolt Tighten: 42 N.m (31 lb ft)
4Seat Shoulder Belt Guide Retainer
5Seat Shoulder Belt Retractor Bolt Tighten: 68 N.m (50 lb ft)
6Seat Shoulder Belt Retractor
WARNING
Refer to SIR Warning .
WARNING
In order to prevent accidental deployment and the risk of personal injury, do not dispose of an undeployed inflatable restraint seat belt pretensioner as normal shop waste. Undeployed seat belt pretensioners contain substances that could cause severe illness or personal injury if their sealed containers are damaged during disposal. Use the following deployment procedures to safely dispose of an undeployed seat belt pretensioner. Failure to observe the following disposal methods may be a violation of federal, state, or local laws.
WARNING
When carrying an undeployed inflatable restraint seat belt pretensioner: Do not carry the seat belt pretensioner by the wires or connector. Carry the seat belt pretensioner by the piston tube, keeping hands and fingers away from the cable. Make sure the open end of the seat belt pretensioner piston tube points away from you and other people. Do not cover the seat belt pretensioner piston tube opening with your hand. Failure to observe these guidelines may result in personal injury.
CAUTION
Refer to Fastener Caution .

Accident With or Without Air Bag Deployment - Component Inspections

WARNINGProper operation of the Supplemental Inflatable Restraint (SIR) sensing system requires that any repairs to the vehicle structure return the vehicle structure to the original production configuration. Not properly repairing the vehicle structure could cause non-deployment of the air bag(s) in a frontal collision or deployment of the air bag(s) for conditions less severe than intended.

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»(/chevrolet/impala/ix-2006-2016/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.

Accident With Frontal Air Bag Deployment - Component Replacement and Inspections

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

  1. Passenger instrument panel air bag
  2. Driver steering wheel air bag
  3. Inflatable restraint sensing and diagnostic module (SDM)
  4. Front and/or side impact sensors
  5. Driver/Passenger seat side air bag, if deployed
  6. Seat back cover on 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, SDM, 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 SDM has DTC B0052 56.
  4. Inflatable restraint seat belt anchor and/or retractor pretensioner.
  5. Driver or passenger seat back cushion cover replacement.
WARNINGDo not repair or replace the seat stitching or seams in the seat back trim cover with an internal mounted seat side airbag module. Replace the complete seat back trim cover from the OEM. Non-OEM seat stitching may cause improper airbag deployment which could result in personal injury.

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 SDM 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.

  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

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»(/chevrolet/impala/ix-2006-2016/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-1-2-shift-solenoid-through-door-lock) 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»(/chevrolet/impala/ix-2006-2016/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-1-2-shift-solenoid-through-door-lock) 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»(/chevrolet/impala/ix-2006-2016/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-1-2-shift-solenoid-through-door-lock) 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»(/chevrolet/impala/ix-2006-2016/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-1-2-shift-solenoid-through-door-lock) 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.

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.

WARNINGIn order to prevent accidental deployment of the pretensioner which could cause personal injury, do not dispose of an undeployed pretensioner as normal shop waste. The undeployed pretensioner contains substances that could cause severe illness or personal injury if the sealed container is damaged during disposal. Use the following deployment procedures to safely dispose of an undeployed pretensioner. Failure to dispose of a pretensioner as instructed may be a violation of federal, state, or local laws.
WARNINGWhen you are deploying a pretensioner for disposal, perform the deployment procedures in the order listed. Failure to follow the procedures in the order listed may result in personal injury.
  1. J 39401-B SIR Deployment Fixture. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  2. J 38826 SIR Deployment Harness. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  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 J 39401-B SIR Deployment Fixture in the center of the cleared area. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  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 J 39401-B arms (4) to the deployment fixture (3). See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) . To mount, use the proper size bolt (2) and nut (5) with washers in order to secure the pretensioner (1) to the deployment fixture brackets (4). Securely tighten all fasteners prior to deployment.
  11. Inspect the J 38826 SIR Deployment Harness and the appropriate pigtail adapter for damage. Replace as needed. See «Special Tools»(/chevrolet/impala/ix-2006-2016/remont/airbag/#supplemental-inflatable-restraint-system) .
  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 pretensioners (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. 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 driver steering wheel (dual air bags), passenger instrument panel (passenger side) (dual air bags), driver seat side (B-pillar), passenger seat side (B-pillar), left roof rail, and 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 of the air bag. For more severe frontal collisions a full deployment is initiated which consists of stage 1 and stage 2 of the air bag. 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 Pretensioners (Anchor and Retractor)

The seat belt pretensioners (driver and passenger) consist of a housing, seat belt retractor (located in the B-pillar), seat belt anchor (located on the outboard side of 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 front air bags deploying, or they will deploy immediately before the front air bags deploy. A shorting bar (if equipped) is located in the connector.

Impact Sensors

This vehicle contains 4 impact sensors. The 4 impact sensors are located in the front of the vehicle (2, left and right), and 2 in the front doors (left and right). 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 sensors 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

IMPORTANTThe Passenger Presence System (PPS) and the seat bottom foam cushion is a calibrated unit and cannot be service separately. After repairing or replacing the PPS, the system must be checked for preload in order to function properly.

The PPS is used to monitor the pressure profile of an occupant on the front outboard passenger seat and communicate the status to the sensing and diagnostic module (SDM) whether to enable or suppress the deployment of the instrument panel (I/P) module. The PPS consists of an electronic control module and sensor mat assembly attached to the bottom seat cushion, wiring harness, and PASSENGER AIR BAG ON/OFF indicators. The PPS measures the weight of the occupant sitting in the front passenger seat as a pressure change. If the pressure from the occupant's weight is less than a specified value, the PPS module will send a suppress signal to the SDM to disable the I/P module. If the pressure from the occupant's weight is higher than a specified value, the PPS module will send an enable signal to the SDM to enable the I/P module. The PPS module will notify the customer of the enable/disable status by turning ON one of the PASSENGER AIR BAG ON/OFF indicators. The PPS monitors itself for faults and will set diagnostic trouble codes (DTCs) if a fault is detected. The PPS will also notify the SDM of a fault. The SDM will respond by requesting the instrument panel cluster (IPC) to turn the SIR system AIR BAG indicator ON.

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 .

Illustration Tool Number/ Description J 38715-A Driver or Passenger Load Tool Brazil - Use Local Equivalent J 38826 SIR Deployment Harness J 39401-B SIR Deployment Fixture CH 42640 Steering Column Anti-rotation Pin Brazil - Use Local Equivalent

Scheme 16

Scheme 16: Special Tools
Scheme 16: Special Tools

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
• DTC B1325, B1330, B1420, B1424, B1517, C0800, C0895, C0899, C0900, P0560, P0562, or P0563
• Seat Belt System Description and Operation
• Checking Aftermarket Accessories
• Electrical Center Identification Views
• SIR Warning
• Radiator Air Upper Baffle and Deflector Replacement
• Headlamp Replacement
• Front Bumper Fascia Energy Absorber Replacement
• Fastener Caution
• Front Side Door Trim Panel Replacement
• Front Seat Replacement - Bucket (Impala)
• Floor Panel Carpet Replacement (Impala)
• SIR Inflator Module Handling and Storage Warning
• Steering Wheel Replacement
• Instrument Panel Upper Trim Pad 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
• Component Connector End Views
• SIR Disabling and Enabling
• DTC B0012 or B0013
• Passenger Presence System Preload Test
• SIR Identification Views
• Inflatable Restraint Steering Wheel Module Coil Centering
• Fastener Tightening Specifications