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Supplemental Inflatable Restraint System Cadillac DTS I

Airbag 21 illustrations ~18165 words

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Inflatable Restraint Front End Sensor9 N.m80 lb in
Inflatable Restraint IP Module Fasteners9 N.m80 lb in
Inflatable Restraint Rear Side Impact Inflator Module Fasteners9 N.m80 lb in
Inflatable Restraint Sensing and Diagnostic Module (SDM) Fasteners9 N.m80 lb in
Inflatable Restraint Side Impact Inflator Module to Seat Fasteners9 N.m80 lb in
Inflatable Restraint Side Impact Sensor (SIS) Fasteners9 N.m80 lb in
Seat Belt Buckle Pretensioner Bolt41 N.m30 lb ft
Steering Column Shrouds1.5 N.m13 lb in
Steering Wheel Nut41 N.m30 lb ft

Scheme 1

Scheme 1: SIR Schematics
Scheme 1: SIR Schematics

Scheme 2

Scheme 2
Scheme 2

Scheme 3

Scheme 3
Scheme 3

Scheme 4

Scheme 4
Scheme 4

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 5

Scheme 5: SIR Identification Views
Scheme 5: SIR Identification Views
CalloutComponent Name
1Right Front End Sensor-Located on the front of the vehicle in the engine compartment
2Front Hood Assist Rod-A gas shock located under the front hood on the passenger side
3I/P Air Bag-Located at the top right under the instrument panel
4Right Roof Rail Air Bag-Located under the headliner, extending from the passenger front windshield pillar to the passenger rear windshield pillar
5Sensing and Diagnostic Module (SDM)-Located underneath the center console
6Passenger Presence System (PPS)-Located on the passenger front seat underneath the seat bottom trim
7RF Side Impact Air Bag-Located on the seat back of passenger seat
8Right Seat Belt Retractor Pretensioner and Side Impact Sensor (SIS)-Located under the center pillar trim near the bottom on the passenger side
9Inflator Module for Right Roof Rail Air Bag-Located near rear pillar on passenger side
10Rear Compartment Lid Assist Rod-A gas shock is located under the rear trunk lid on the passenger side
11Rear Compartment Lid Assist Rod-A gas shock is located under the rear trunk lid on the driver side
12Inflator Module for Left Roof Rail Air Bag-Located near rear pillar on driver side
13Vehicle Battery-Located under the rear seat bottom cushion
14Left Seat Belt Retractor Pretensioner and Side Impact Sensor (SIS)-Located under the center pillar trim near the bottom on the driver side
15LF Side Impact Air Bag-Located on the seat back of driver seat
16Left Roof Rail Air Bag-Located under the headliner, extending from the driver front windshield pillar to the driver rear windshield pillar
17Steering Wheel Air Bag-Located on the steering wheel
18Front Hood Assist Rod-A gas shock located under the front hood on the driver side
19Left Front End Sensor-Located on the front of the vehicle in the engine compartment

DIAGNOSTIC CODE INDEX

DTCDescription
DTC B0012 or B0013B0012 01: Driver Frontal Deployment Loop Stage 1 Short to Battery B0012 02: Driver Frontal Deployment Loop Stage 1 Short to Ground B0012 04: Driver Frontal Deployment Loop Stage 1 Open Circuit B0012 0D: Driver Frontal Deployment Loop Stage 1 Resistance Above Threshold B0012 0E: Driver Frontal Deployment Loop Stage 1 Resistance Below Threshold B0013 01: Driver Frontal Deployment Loop Stage 2 Short to Battery B0013 02: Driver Frontal Deployment Loop Stage 2 Short to Ground B0013 04: Driver Frontal Deployment Loop Stage 2 Open Circuit B0013 0D: Driver Frontal Deployment Loop Stage 2 Resistance Above Threshold B0013 0E: Driver Frontal Deployment Loop Stage 2 Resistance Below Threshold
DTC B0014-B0045
DTC B0052 or B0053B0052: Deployment Commanded B0053: Deployment Commanded with Loop DTCs Present
DTC B0055B0055 00: Side Airbag Deployment Commanded
DTC B0056B0056 00: Passenger Frontal Airbag Suppressed
DTC B0057B0057 00: Passenger Side Air Bag Suppressed
DTC B0071B0071 03: Passenger Seat Belt Tension Sensor Circuit Voltage Below Threshold B0071 07: Passenger Seat Belt Tension Sensor Circuit Voltage Above Threshold
DTC B0073B0073 01: Passenger Seat Belt Sensor Circuit Short to Battery B0073 02: Passenger Seat Belt Sensor Circuit Short to Ground B0073 04: Passenger Seat Belt Sensor Circuit Open Circuit B0073 06: Passenger Seat Belt Sensor Circuit Short To Ground or Open Circuit B0073 08: Passenger Seat Belt Sensor Circuit Signal Invalid
DTC B0074B0074 03: Passenger Occupant Classification Sensor Circuit Voltage Below Threshold B0074 07: Passenger Occupant Classification Circuit Voltage Above Threshold
DTC B0080B0080 01: Passenger Seat Position Sensor Circuit Short to Battery B0080 02: Passenger Seat Position Sensor Circuit Short to Ground B0080 04: Passenger Seat Position Sensor Circuit Open B0080 06: Passenger Seat Position Sensor Circuit Short to Ground or Open Circuit
DTC B0081B0081 0F: Passenger Presence System Erratic B0081 39: Passenger Presence System Internal Electronic Failure B0081 3A: Passenger Presence System Incorrect Component Installed B0081 71: Passenger Presence System Invalid Serial Data Received
DTC B0083 or B0084B0083 01: Front End Sensor 1 Short to Battery (Left) B0083 02: Front End Sensor 1 Short to Ground (Left) B0083 05: Front End Sensor 1 Short to Battery or Open (Left) B0083 0F: Front End Sensor 1 Erratic (Left) B0083 39: Front End Sensor 1 Internal Electronic Failure (Left) B0083 3A: Front End Sensor 1 Incorrect Component Installed (Left) B0083 71: Front End Sensor 1 Invalid Serial Data Received (Left) B0084 01: Front End Sensor 2 Short to Battery (Right) B0084 02: Front End Sensor 2 Short to Ground (Right) B0084 05: Front End Sensor 2 Short to Battery or Open (Right) B0084 0F: Front End Sensor 2 Erratic (Right) B0084 39: Front End Sensor 2 Internal Electronic Failure (Right) B0084 3A: Front End Sensor 2 Incorrect Component Installed (Right) B0084 71: Front End Sensor 2 Invalid Serial Data Received (Right)
DTC B0085 or B0086B0085 02: LF Side Impact Sensor Short to Ground B0085 05: LF Side Impact Sensor Short to Battery or Open B0085 0F: LF Side Impact Sensor Erratic B0085 39: LF Side Impact Sensor Internal Electronic Failure B0085 3A: LF Side Impact Sensor Incorrect Component Installed B0085 71: LF Side Impact Sensor Invalid Serial Data Received B0086 02: RF Side Impact Sensor Short to Ground B0086 05: RF Side Impact Sensor Short to Battery or Open B0086 0F: RF Side Impact Sensor Erratic B0086 39: RF Side Impact Sensor Internal Electronic Failure B0086 3A: RF Side Impact Sensor Incorrect Component Installed B0086 71: RF Side Impact Sensor Invalid Serial Data Received
DTC B1000B1000 00: Electronic Control Unit (ECU) Performance No Additional Information Available B1000 33: Electronic Control Unit (ECU) Performance Special Memory Failure B1000 34: Electronic Control Unit (ECU) Performance RAM Integrity B1000 35: Electronic Control Unit (ECU) Performance ROM Integrity B1000 36: Electronic Control Unit (ECU) Performance EEPROM Integrity B1000 37: Electronic Control Unit (ECU) Performance Watchdog Failure B1000 39: Electronic Control Unit (ECU) Performance Internal Electronic Failure B1000 43: Electronic Control Unit (ECU) Performance EEPROM Error B1000 56: Electronic Control Unit (ECU) Performance Allowable Number of Transitions/Events Exceeded B1000 73: Electronic Control Unit (ECU) Performance Parity Error
DTC B1001 (SDM)B1001 00: SDM 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 Starting Point - SIR

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

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

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

Diagnostic Instructions

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

CircuitShort to GroundLow ResistanceHigh ResistanceOpenShort to Voltage
Steering Wheel Module Stage 1 High CircuitB0012 02B0012 0EB0012 0DB0012 04B0012 01
Steering Wheel Module Stage 1 Low CircuitB0012 02B0012 0EB0012 0DB0012 04B0012 01
Steering Wheel Module Stage 2 High CircuitB0013 02B0013 0EB0013 0DB0013 04B0013 01
Steering Wheel Module Stage 2 Low CircuitB0013 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 steering wheel module. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage.

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

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

B0012 01 Stage 1 or B0013 01 Stage 2

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

B0012 02 Stage 1 or B0013 02 Stage 2

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

B0012 04 Stage 1 or B0013 04 Stage 2

The steering wheel module high and/or low circuit is open for 120 milliseconds.

B0012 0D Stage 1 or B0013 0D Stage 2

The steering wheel module deployment loop resistance is more than 5.1 ohms for 120 milliseconds.

B0012 0E Stage 1 or B0013 0E Stage 2

The steering wheel module deployment loop resistance is less than 1.3 ohms for 120 milliseconds.

Action Taken When the DTC Sets

  1. The SDM commands the AIR BAG indicator ON via serial data communications.
  2. The SIR system is disabled and no deployments are allowed.

Conditions for Clearing the DTC

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

Reference Information

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  4. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)

Scan Tool Reference

Special Tools

  1. J 38715-A SIR Driver/Passenger Load Tool. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  2. SA9409Z-A SIR Driver/Passenger Load Tool

Circuit/System Testing

IMPORTANTRefer to SIR Service Precautions .
IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector. The pretensioner The air bag module The SDM module The air bag wiring harness connector The SDM wiring harness connector
  1. Verify that the steering wheel module connector and the connector position assurance (CPA) are engaged. IMPORTANT: The connector and CPA may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly. If the above condition is found, make the appropriate repair.
  2. Ignition OFF, disconnect the steering wheel module.
  3. With the applicable adaptor, connect special tool J 38715-A or SA9409Z-A . See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  4. 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.
  5. Ignition OFF, disconnect special tool J 38715-A or SA9409Z-A . See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  6. Disconnect the steering wheel module coil in-line connector.
  7. With the applicable adaptor, connect special tool J 38715-A or SA9409Z-A . See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  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 or SA9409Z-A and the applicable adaptor. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  10. Ignition ON, test for less than 1 volt between the applicable high control circuit and ground. Steering wheel module coil connector Stage 1 terminal 1 (X3) Steering wheel module coil connector Stage 2 terminal 3 (X3) If not the specified range, test the circuit for a short to voltage.
  11. Test for less than 1 volt between the applicable low control circuit and ground. Steering wheel module coil connector Stage 1 terminal 2 (X3) Steering wheel module coil connector Stage 2 terminal 4 (X3) If not the specified range, test the circuit for a short to voltage.
  12. Ignition OFF, test for infinite resistance between the applicable high control circuit and ground. Steering wheel module coil connector Stage 1 terminal 1 (X3) Steering wheel module coil connector Stage 2 terminal 3 (X3) If not the specified range, test the circuit for a short to ground.
  13. Test for infinite resistance between the applicable low control circuit and ground. Steering wheel module coil connector Stage 1 terminal 2 (X3) Steering wheel module coil connector Stage 2 terminal 4 (X3) If not the specified range, test the circuit for a short to ground.
  14. Disconnect the harness connector at the SDM.
  15. Test for less then 1 ohm of resistance between the following high control circuit terminals. Steering wheel module coil connector Stage 1 terminal 1 (X3) and SDM terminal 9 Steering wheel module coil connector Stage 2 terminal 3 (X3) and SDM terminal 5 If not the specified range, test the circuit for an open/high resistance.
  16. Test for less then 1 ohm of resistance between the following low control circuit terminals. Steering wheel module coil connector Stage 1 terminal 2 (X3) and SDM terminal 8 Steering wheel module coil connector Stage 2 terminal 4 (X3) and SDM terminal 4 If not 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. «Inflatable Restraint Steering Wheel Module Replacement»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundLow ResistanceHigh ResistanceOpenShort to Voltage
Side Impact Module - Left - Low ControlB0014 02B0014 0EB0014 0DB0014 04B0014 01
Side Impact Module - Left - High ControlB0014 02B0014 0EB0014 0DB0014 04B0014 01
Seat Belt Pretensioner - Driver Low ControlB0015 02B0015 0EB0015 0DB0015 04B0015 01
Seat Belt Pretensioner - Driver - High ControlB0015 02B0015 0EB0015 0DB0015 04B0015 01
Roof Rail Module - Left - Low ControlB0016 02B0016 0EB0016 0DB0016 04B0016 01
Roof Rail Module - Left - High ControlB0016 02B0016 0EB0016 0DB0016 04B0016 01
IP Module - Stage 1 - Low ControlB0019 02B0019 0EB0019 0DB0019 04B0019 01
IP Module - Stage 1 - High ControlB0019 02B0019 0EB0019 0DB0019 04B0019 01
IP Module - Stage 2 - Low ControlB0020 02B0020 0EB0020 0DB0020 04B0020 01
IP Module - Stage 2 - High ControlB0020 02B0020 0EB0020 0DB0020 04B0020 01
Side Impact Module - Right - Low ControlB0021 02B0021 0EB0021 0DB0021 04B0021 01
Side Impact Module - Right - High ControlB0021 02B0021 0EB0021 0DB0021 04B0021 01
Seat Belt Pretensioner - Passenger - Low ControlB0022 02B0022 0EB0022 0DB0022 04B0022 01
Seat Belt Pretensioner - Passenger - High ControlB0022 02B0022 0EB0022 0DB0022 04B0022 01
Roof Rail Module - Right - Low ControlB0023 02B0023 0EB0023 0DB0023 04B0023 01
Roof Rail Module - Right - High 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 inflatable restraint module. There are 2 shorting bars used within the module connector which will short together both high and low circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the inflator module during servicing.

Ignition voltage is between 9-16 volts.

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

The inflatable restraint module high and/or low circuit is short to voltage for 120 milliseconds.

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

The inflatable restraint module high and/or low circuit is short to ground for 120 milliseconds.

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

The inflatable restraint module 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 inflatable restraint module deployment loop resistance is more than 3.9 ohms for 120 milliseconds.

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

The inflatable restraint module deployment loop resistance is less than 1.1 ohms for 120 milliseconds.

  1. The SDM commands the AIR BAG indicator ON via serial data communications.
  2. The SDM will store a DTC, if an event occurs system will still attempt deployments.
  1. The condition responsible 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»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  4. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)

Scan Tool Reference

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 .

IMPORTANTRefer to SIR Service Precautions .
IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector. The pretensioner The inflatable restraint module The SDM module The inflatable restraint module wiring harness connector The SDM wiring harness connector
  1. Ignition OFF, disconnect the harness connector at the applicable inflatable restraint module.
  2. With the applicable adaptor, connect J 38715-A in place of the inflatable restraint module. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  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 applicable inflatable restraint module.
  4. Ignition OFF, disconnect J 38715-A and the applicable adaptor. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  5. Disconnect the harness connector at the SDM.
  6. Ignition ON, test for less than 1 volt between the applicable high control circuit and ground. I/P module Stage 1 terminal B (X1) I/P module Stage 2 terminal B (X2) Left roof rail module terminal B Right roof rail module terminal B Left side impact module terminal B Right side impact module terminal B Left seat belt pretensioner terminal 2 Right seat belt pretensioner terminal 2 If not the specified range, test the circuit for a short to voltage.
  7. Test for less than 1 volt between the applicable low control circuit terminal and ground. I/P module Stage 1 terminal A (X1) I/P module Stage 2 terminal A (X2) Left roof rail module terminal A Right roof rail module terminal A Left side impact module terminal A Right side impact module terminal A Left seat belt pretensioner terminal 1 Right seat belt pretensioner terminal 1 If not the specified range, test the circuit for a short to voltage.
  8. Ignition OFF, test for infinite resistance between the applicable high control circuit terminal and ground. I/P module Stage 1 terminal B (X1) I/P module Stage 2 terminal B (X2) Left roof rail module terminal B Right roof rail module terminal B Left side impact module terminal B Right side impact module terminal B Left seat belt pretensioner terminal 2 Right seat belt pretensioner terminal 2 If not the specified range, test the circuit for a short to ground.
  9. Test for infinite resistance between the applicable low control circuit terminal and ground. I/P module Stage 1 terminal A (X1) I/P module Stage 2 terminal A (X2) Left roof rail module terminal A Right roof rail module terminal A Left side impact module terminal A Right side impact module terminal A Left seat belt pretensioner terminal 1 Right seat belt pretensioner terminal 1 If not the specified range, test the circuit for a short to ground.
  10. Test for less then 1 ohm between the following high control circuit terminals. I/P module Stage 1 terminal B (X1) and SDM terminal 10 I/P module Stage 2 terminal B (X2) and SDM terminal 6 Left roof rail module terminal B and SDM terminal 21 Right roof rail module terminal B and SDM terminal 22 Left side impact module terminal B and SDM terminal 13 Right side impact module terminal B and SDM terminal 14 Left seat belt pretensioner terminal 2 and SDM terminal 25 Right seat belt pretensioner terminal 2 and SDM terminal 26 If not the specified range, test the circuit for an open/high resistance.
  11. Test for less then 1 ohm between the following low control circuit terminals. I/P module Stage 1 terminal A (X1) and SDM terminal 11 I/P module Stage 2 terminal A (X2) and SDM terminal 7 Left roof rail module terminal A and SDM terminal 20 Right roof rail module terminal A and SDM terminal 23 Left side impact module terminal A and SDM terminal 12 Right side impact module terminal A and SDM terminal 15 Left seat belt pretensioner terminal 1 and SDM terminal 24 Right seat belt pretensioner terminal 1 and SDM terminal 27 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. «Inflatable Restraint Instrument Panel Module Replacement»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Roof Side Rail Inflatable Restraint Module Replacement»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  3. «Inflatable Restraint Side Impact Module Replacement - Front»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  4. «Seat Belt Retractor Pretensioner Replacement - Front»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  5. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  6. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0052

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

B0053

SDM commands inflators deployment with loop faults present.

  1. The SDM will only set DTC B0052 or the SDM sets DTC B0053 along with DTC B0052.
  2. The SDM commands the AIR BAG indicator ON.
  3. The SDM records crash data.

DTC B0052 can be cleared if the following conditions are met.

  1. Three consecutive seat belt pretensioner deployment events have not occurred.
  2. One frontal or side air bag deployment has not occurred.

DTC B0052 becomes a latched code after 3 consecutive pretensioner deployments or 1 frontal or side air bag deployment. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.

Diagnostic Aids

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 deployment event. After the maximum number of deployments has occurred, DTC B0052 sets and becomes a latched code, which cannot be cleared.

When DTC B0053 is accompanied by additional DTCs, other than B0052, repair the malfunction causing the other DTCs before replacing SDM.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  4. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

  1. Ignition OFF, inspect the vehicle for signs of inflator module or pretensioner deployment. Verify that the vehicle does not show any signs of inflator deployment. If the vehicle displays any signs of inflator deployment, refer to «Repairs and Inspections Required After a Collision»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) .
  2. Verfiy DTC B0052 is not reset. If DTC is set, with a scan tool, clear DTCs. If the DTC resets, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) contains a sensing device that converts vehicle velocity changes into an electrical signal. The SDM compares this electrical signal to a value stored in memory. When the generated signal exceeds the stored value, the SDM performs additional signal processing and compares the generated signals to values stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the side air bags and causing DTC B0055 to set. This DTC is set when the SDM has commanded an air bag deployment with no faults present.

Ignition voltage is between 9-16 volts.

  1. This SDM detects a frontal crash of sufficient force to warrant deployment of the frontal inflator modules.
  2. The SDM detects a side impact crash of sufficient force to warrant deployment of a side inflator module.
  1. The SDM sets a DTC.
  2. DTC B0052 or B0053 will set.
  3. The SDM commands the AIR BAG indicator ON.
  4. The SDM records crash data.

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»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  4. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__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 side impact or frontal inflator module deployment. If the vehicle displays any signs of inflator deployment, refer to «Repairs and Inspections Required After a Collision»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) .
  2. Verify DTC B0055 is not set. If DTC B0055 is set, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the passenger presence 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 instrument panel (I/P) module. When the PPS detects a fault within itself, then the PPS will communicate to the SDM through GMLAN communications that a PPS fault is present. The SDM will suppress the deployment of the module and then turn the AIR BAG indicator ON.

Ignition voltage is between 9-16 volts.

This DTC is set 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 I/P module.
  2. Empty front passenger seat
  3. A PPS fault was detected
  1. The SDM sets a DTC B0056.
  2. DTC B0052, B0053, or B0055 will set along with this DTC.
  3. The SDM commands the AIR BAG indicator ON.

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

This code set because the PPS commanded to suppress the I/P module when the vehicle was involved in a collision and the SDM has commanded an air bag deployment.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  4. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__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 inflator module or pretensioner deployment. If the vehicle displays any signs of inflator deployment, refer to «Repairs and Inspections Required After a Collision»(/cadillac/dts/i-2005-2011/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»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list) .
  3. Verify DTC B0056 is not set. If DTC is set, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the passenger presence 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 side impact module (front seat air bag). When the PPS detects a fault within itself, then the PPS will communicate to the SDM through GMLAN communications that a PPS fault is present. The SDM will suppress the deployment of the module and then turn the AIR BAG indicator ON.

Ignition voltage is between 9-16 volts.

This DTC is set 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 occupants weight is less than a specified value. The PPS module sent a suppress signal to the SDM to suppress the side impact module.
  2. Empty front passenger seat
  3. A PPS fault was detected.
  1. The SDM sets a DTC B0057.
  2. DTC B0052, B0053, or B0055 will set along with this DTC.
  3. The SDM commands the AIR BAG indicator ON.

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

This code set because the PPS commanded to suppress the side impact module when the vehicle was involved in a collision and the SDM has commanded an air bag deployment.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  4. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

  1. Ignition OFF, verify no signs of inflator module or pretensioner deployment exist. If any signs of deployment exist, refer to «Repairs and Inspections Required After a Collision»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) .
  2. With a scan tool, verify DTC B0052, B0053, or B0055 is not set. If DTC is set, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list) .
  3. With a scan tool, clear DTCs. Verify DTC B0057 is not set. If DTC is set, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  2. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to Voltage
Belt Tension Sensor Low ReferenceB0071 07B0071 07
Belt Tension Sensor SignalB0071 03B0071 03, 07B0071 03, 07B0071 07
Belt Tension Sensor Voltage ReferenceB0071 03B0071 03B0071 03

The inflatable restraint seat belt tension sensor is a 3-wire potentiometer mounted on the buckle side of the passenger seat belt and provides an input to the passenger presence system (PPS). When an infant car seat is properly restrained on the front passenger seat, the seat belt is tightly secured through the car seat. The seat belt pulls on the tension sensor and changes the voltage signal to the PPS module. The PPS monitors the belt tension sensor signal circuit and if a fault is detected, DTC will be set. When the PPS detects this DTC it will send out a serial data message and the SDM will notify the customer of the enable/disable status by turning ON the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators. The SDM will then suppress the deployment of the instrument panel (I/P) module and turn the AIR BAG indicator ON.

Ignition voltage is between 9-16 volts.

  1. The PPS detects the voltage at the belt tension sensor signal circuit is less than 0.05 volt or greater than 4.5 volts for 500 milliseconds.
  2. The PPS detects the voltage at the belt tension sensor voltage reference circuit is less than 4.5 volts or greater than 9.1 volts for 500 milliseconds.
  3. The PPS detects the amperage at the belt tension sensor low reference circuit is 25 MA or greater for 500 milliseconds.
  1. The PPS will set a DTC, and then communicate with the SDM via serial data communications.
  2. The SDM disables the I/P module deployment loop.
  3. The PPS will turn ON the passenger air bag status OFF indicator.
  4. The SDM commands the AIR BAG indicator ON via GMLAN serial data.
  1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
  2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Inspect the passenger seat belt tension sensor signal, voltage reference, and low reference circuits carefully for cutting and/or chafing.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

IMPORTANTThe seat belt tension sensor is not serviced separately. The seat belt buckle replacement with the seat belt tension sensor must be serviced as a complete unit.
  1. Ignition OFF, disconnect the harness connector at the seat belt tension sensor and inspect the component and harness sides for damage or corrosion. If damage or corrosion is found, repair or replace as necessary.
  2. Ignition ON, test for 4.5-5.5 volts between the voltage reference circuit terminal A and ground. If less that the specified range, test the voltage reference circuit for open/high resistance or a short to ground. If the circuit tests normal, replace the PPS. If greater that the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the PPS.
  3. Ignition OFF, remove the AIRBAG Fuse. Test for less than 2.0 ohms of resistance between low reference terminal B and ground. If greater than the specified range, test the low reference circuit for open/high resistance. If the circuit tests normal, replace the PPS.
  4. Ignition OFF, disconnect the harness connector at the PPS module.
  5. Test for infinite resistance between the signal circuit terminal C and ground. If less than the specified value, test the signal circuit for a short to ground.
  6. Ignition ON, test for less than 1 volt between the signal circuit terminal C and ground. If greater than the specified range, test the signal circuit for a short to voltage.
  7. Test for less than 1 ohm of resistance in the signal circuit between PPS module terminal 4 and belt tension sensor terminal C. If greater than the specified range, test the signal circuit for open/high resistance. If the circuit tests normal, replace the PPS.
  8. If all circuits test normal, replace the passenger seat belt buckle which includes the seat belt tension sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Front Seat Belt Buckle Replacement»(/cadillac/dts/i-2005-2011/remont/restraints-control-systems/#seat-belt-system)
  2. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint seat belt buckle switch is within the seat belt buckle and provides an input to the inflatable restraint sensing and diagnostic module (SDM). The SDM supplies a low reference circuit and a seat belt switch signal circuit to determine a buckled or unbuckled condition. The SDM monitors the seat belt switch circuits, and if a fault is detected a DTC will be set.

Ignition voltage is between 9-16 volts.

B0073 01

The SDM detects the seat switch signal circuit or low reference circuit is shorted to voltage for 500 milliseconds.

B0073 02

The SDM detects the seat switch signal circuit or low reference circuit is shorted to ground for 500 milliseconds.

B0073 04

The SDM detects the seat switch signal circuit or low reference circuit is open for 500 milliseconds.

B0073 06

The SDM detects the seat switch signal circuit or low reference circuit is shorted to ground or an open for 500 milliseconds.

B0073 08

The SDM detects an invalid signal in the seat switch signal circuit.

  1. The SDM commands ON the AIR BAG warning lamp via serial data communications.
  2. The SDM will store a DTC.
  1. The condition responsible 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

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  4. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
IMPORTANTThe seat belt buckle switch is not serviced separately. The seat belt buckle with the seat belt buckle switch must be serviced as a complete unit. When removing connectors, inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector: The SDM The seat belt buckle switch wiring harness connector The seat belt buckle switch The SDM wiring harness connector
  1. Ignition OFF, disconnect the harness connector of the seat belt switch.
  2. Test for less than 1.0 ohm of resistance between low reference terminal A and ground. If greater than specified, test the low reference circuit for open/high resistance. If the circuit tests normal, replace the SDM.
  3. Ignition ON. Test for 1.0 - 1.6 volts between the signal circuit terminal B and ground. If less that the specified range, test the signal circuit for open/high resistance or a short to ground. If the circuit tests normal, replace the SDM. If greater that the specified range, test the signal circuit for a short to voltage.
  4. If the circuits test normal, replace the seat belt buckle.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Seat Belt Retractor Pretensioner Replacement - Front»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to Voltage
Pressure Sensor Low ReferenceB0074 03B0074 03
Pressure Sensor SignalB0071 07B0071 03, 07B0071 03, 07B0074 03
Pressure Sensor Voltage ReferenceB0074 07B0074 07B0074 07B0074 03

The passenger presence system (PPS) uses a silicone filled sensor pad located underneath the passenger seat foam cushion and is connected by a hose clamp to a pressure sensor. The weight of the occupant sitting in the front passenger seat is measured as a pressure change within the bladder by the pressure sensor. The pressure sensor is a 3-wire sensor consisting of a high and low reference, and signal circuit. The PPS monitors the pressure sensor signal circuit and if a fault is detected, DTC will be set. When the PPS detects this DTC it will send out a serial data message and the SDM will notify the customer of the enable/disable status by requesting the instrument panel cluster to turn ON the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators. The SDM will then suppress the deployment of the instrument panel (I/P) module and turn the AIR BAG indicator ON.

Ignition voltage is between 9-16 volts.

  1. The PPS detects the voltage at the pressure sensor signal is less than 0.05 volt or greater than 4.5 volts for 500 milliseconds.
  2. The PPS detects the voltage at the pressure sensor voltage reference is less than 4.5 volts or greater than 9.1 volts for 500 milliseconds.
  3. The PPS detects the amperage at the sensor low reference is 25 mA or greater for 500 milliseconds.
  1. The PPS will set a DTC, and then communicate with the SDM via serial data communications.
  2. The SDM disables the I/P module deployment loop.
  3. The SDM will request the IPC to turn ON the passenger air bag status OFF indicator.
  4. The SDM commands ON the AIR BAG warning lamp via serial data communications.
  1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
  2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

IMPORTANTThe PPS pressure sensor is not serviced separately. The PPS replacement with the PPS pressure sensor must be serviced as a complete unit.
  1. Ignition OFF, disconnect the harness connector at the PPS pressure sensor and inspect the component and harness sides for damage or corrosion. If damage or corrosion is found, repair or replace as necessary.
  2. Ignition ON, test for 4.5-5.5 volts between the voltage reference circuit terminal A and ground. If less that the specified range, test the voltage reference circuit for open/high resistance or a short to ground. If the circuit tests normal, replace the PPS. If greater that the specified range, test the voltage reference circuit for a short to voltage. If the circuit tests normal, replace the PPS.
  3. Ignition OFF, remove the AIRBAG Fuse. Test for less than 2.0 ohms of resistance between low reference terminal C and ground. If greater than the specified range, test the low reference circuit for open/high resistance. If the circuit tests normal, replace the PPS.
  4. Ignition OFF, disconnect the harness connector at the PPS module.
  5. Test for infinite resistance between the signal circuit terminal B and ground. If less than the specified value, test the signal circuit for a short to ground.
  6. Ignition ON, test for less than 1 volt between the signal circuit terminal B and ground. If greater than the specified range, test the signal circuit for a short to voltage.
  7. Test for less than 1 ohm of resistance in the signal circuit between PPS module terminal 4 and belt tension sensor terminal B. If greater than the specified range, test the signal circuit for open/high resistance. If the circuit tests normal, replace the PPS.
  8. If all circuits test normal, replace the PPS which includes the pressure sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundOpen/High ResistanceShort to VoltageSignal Performance
Low ReferenceB0080 04
Passenger Seat Position Switch SignalB0080 02, 06B0080 04B0080 01

The inflatable restraint seat position sensor (SPS) is used to determine the proximity of a front passenger seat position with respect to the inflatable restraint I/P module. The SPS is a hall effect sensor that is mounted on the seat track of the front passenger seat. The SPS is connected to the sensing and diagnostic module (SDM) with a low reference and a signal circuit. The SDM uses the state of the SPS to determine the need for a stage 2 deployment of the inflatable restraint I/P module. When the seat is in the forward position stage 2 deployment is disabled, and when in the rearward position stage 2 deployment is enabled. The SDM monitors the passenger seat position switch signal circuit and if a fault is detected, the SDM will set DTC B0080 and defaults to disabling stage 2 inflatable restraint I/P module deployment.

Ignition voltage is between 9-16 volts.

B0080 01

The SDM detects the passenger seat position switch signal circuit is shorted to voltage for 500 milliseconds.

B0080 02

The SDM detects the passenger seat position switch signal circuit is shorted to ground for 500 milliseconds.

B0080 04

The SDM detects the passenger seat position switch signal circuit is open for 500 milliseconds.

B0080 06

The SDM detects the passenger seat position switch signal circuit is shorted to ground or an open for 500 milliseconds.

  1. The SDM sets a DTC B0080.
  2. The SDM defaults the SPS to seat forward threshold.
  3. The SDM commands ON the AIR BAG warning lamp via serial data communications.
  1. The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
  2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for Scan Tool Information

Ignition ON, with a scan tool, monitor the SDM Psgr. Seat Position Sensor parameter while moving the passenger seat fully forward and fully rearward. The parameter should change from Forward to Rearward appropriately.

  1. If DTC B0080 is current and the parameters are correct, replace the SDM.
  1. Ignition OFF, disconnect the harness connector at the right SPS and inspect the component and harness sides for damage or corrosion. If damage or corrosion is found, repair or replace as necessary.
  2. Test for less than 2.0 ohms of resistance between low reference terminal 1 and ground. If greater than the specified range, test the low reference circuit for open/high resistance. If the circuit tests normal, replace the SDM.
  3. Ignition ON, test for 4.5 - 5.5 volts between the signal circuit terminal 2 and ground. If less that the specified range, test the signal circuit for open/high resistance or a short to ground. If the circuit tests normal, replace the SDM. If greater that the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the SDM.
  4. If the circuits test normal, replace the seat position sensor.

Perform the Diagnostic Repair Verification after completing the repair.

  1. «Inflatable Restraint Seat Position Sensor Replacement»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the passenger presence system (PPS) 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 PPS. The SDM will also request the instrument panel cluster to command both of the PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. If the SDM detects that the PPS has set a current DTC, the SDM will then disable the instrument panel (I/P) module deployment loop, set DTC B0081, and command the AIR BAG indicator ON.

Ignition voltage is between 9-16 volts.

All of the following conditions must exist for 5 seconds

B0081 0F

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

B0081 39

The SDM has received a fault message from the PPS.

B0081 3A

The SDM has received a message from the PPS indicating a vehicle and PPS mismatch.

B0081 71

The SDM has received invalid or no serial data from the PPS.

  1. The SDM commands the AIR BAG indicator ON via serial data communications.
  2. The I/P module deployment loop will be disable.
  1. The condition responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

If either the SDM or PPS were replaced, verify that the correct part numbers were used for the vehicle application.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. Verify that DTC U0170 is not set in the SDM. If the DTC is set, diagnose that first. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-trouble-code-dtc-list) .
  2. Verify the correct PPS part number is installed in the vehicle. If the wrong PPS was installed, replace with the correct PPS.
  3. Replace the PPS module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for PPS and SDM replacement, setup, and programming
  2. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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

All of the following conditions exist for 2.5 seconds

B0083 01 or B0084 01

The front end sensor has been shorted to voltage.

B0083 02 or B0084 02

  1. The front end sensor has been shorted to ground.
  2. The front end sensor current has been above 23 mA for longer than 5 milliseconds.

B0083 05 or B0084 05

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

B0083 0F or B0084 0F

The SDM has received erratic messages from the front end sensor.

B0083 39 or B0084 39

  1. The SDM has received a NOK message from the front end sensor.
  2. The SDM has not received a message.

B0083 3A or B0084 3A

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

B0083 71 or B0084 71

The SDM has received invalid serial data from the front end sensor.

  1. The SDM commands the AIR BAG indicator ON via serial data communications.
  2. The SIR System is disabled and no deployments are allowed.
  1. The condition responsible 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»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. Ignition OFF, disconnect the applicable front end sensor connector.
  2. Disconnect the harness connector at the SDM.
  3. Ignition ON, test for less than 1 volt between the front end sensor signal circuit terminal B and ground. If greater than the specified range, test the circuit for a short to voltage.
  4. Ignition ON, test for less than 1 volt between the applicable front end sensor low reference circuit terminal A and ground. If greater than the specified range, test the circuit for a short to voltage.
  5. Test for infinite resistance between the front end sensor signal circuit terminal B and ground. If less than infinite resistance, test the circuit for a short to ground.
  6. Test for less then 1 ohm of resistance between the following front end sensor signal circuit terminals. Right front end sensor terminal B and SDM harness connector terminal 37. Left front end sensor terminal B and SDM harness connector terminal 36. If greater than the specified range, test the circuit for an open/high resistance.
  7. Test for less then 1 ohm of resistance between the following front end sensor low reference circuit terminals. If greater than the specified range, test the circuit for an open/high resistance.
  8. If all circuits test normal, replace the applicable front end sensor.
  9. Reconnect all SIR components. Ignition ON, with a scan tool clear and recheck for DTCs. If the front end sensor DTC returns and is current, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Front End Sensor Replacement»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.
CircuitShort to GroundHigh ResistanceOpenShort to VoltageSignal Performance
Left Side Impact Sensor High CircuitB0085 02B0085 0FB0085 05B0085 05B0085 0F
Left Side Impact Low CircuitB0085 02B0085 0FB0085 05B0085 05B0085 0F
Right Side Impact Sensor High CircuitB0086 02B0086 0FB0086 05B0086 05B0086 0F
Right Side Impact Low CircuitB0086 02B0086 0FB0086 05B0086 05B0086 0F

The inflatable restraint side impact sensor utilizes a unidirectional 2-wire circuit. The side 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 side impact sensor. When the ignition is turned ON and input power from the SDM is first detected, the side 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 side impact sensor continually communicates status messages to the SDM, which determines if a fault is present in the side impact sensor circuit. When a fault is detected, the SDM may reset the side 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.

All of the following conditions exist for 2.5 seconds

B0083 02 or B0084 02

  1. The side impact sensor has been shorted to ground.
  2. The side impact sensor current has been above 23 mA for longer than 5 milliseconds.

B0083 05 or B0084 05

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

The SDM has received erratic messages from the side impact sensor.

B0083 39 or B0084 39

  1. The SDM has received a NOK message from the side impact sensor.
  2. The SDM has not received a message.

B0083 3A or B0084 3A

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

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

  1. The SDM commands the AIR BAG indicator ON via serial data communications.
  2. The SIR System is disabled and no deployments are allowed.
  1. The condition responsible 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»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information.

  1. Ignition OFF, disconnect the applicable front end sensor connector.
  2. Disconnect the harness connector at the SDM.
  3. Ignition ON, test for less than 1 volt between the side impact sensor high circuit terminal B and ground. If greater than the specified range, test the circuit for a short to voltage.
  4. Ignition ON, test for less than 1 volt between the side impact sensor low circuit terminal A and ground. If greater than the specified range, test the circuit for a short to voltage.
  5. Test for infinite resistance between the side impact sensor high circuit terminal B and ground. If less than infinite resistance, test the circuit for a short to ground.
  6. Test for less then 1 ohm of resistance between the following side impact sensor high circuit terminals. Right side impact sensor terminal B and SDM harness connector terminal 43. Left side impact sensor terminal B and SDM harness connector terminal 42. If greater than the specified range, test the circuit for an open/high resistance.
  7. Test for less then 1 ohm of resistance between the following side impact sensor low circuit terminals. Right side impact sensor terminal A and SDM harness connector terminal 41. Left side impact sensor terminal A and SDM harness connector terminal 40. If greater than the specified range, test the circuit for an open/high resistance.
  8. If all circuits test normal, replace the applicable side impact sensor.
  9. Reconnect all SIR components. Ignition ON, with a scan tool clear and recheck for DTCs. If the side impact sensor DTC returns and is current, replace the SDM.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «Inflatable Restraint Side Impact Sensor Replacement»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

This diagnostic is specific to the passenger presence system (PPS) module. The internal fault detection is typically handled inside the control module, however the PPS module may set DTC B1000 due to other system malfunctions.

The module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This program runs even if the voltage is out of the valid operating range.

The module has detected an internal malfunction or a specific sensor circuit may be shorted.

The module refuses all additional inputs.

  1. A current DTC clears when the malfunction is no longer present.
  2. A history DTC clears when the module ignition cycle counter reaches the reset threshold of 100, without a repeat of the malfunction.
  1. DTC B1000 may set in the PPS module due to shorted circuits of the PPS pressure sensor or the seat belt tension sensor.
  2. This DTC may be stored as a history DTC without affecting the operation of the module.
  3. If stored only as a history DTC and not retrieved as a current DTC, do not replace the module.

Ignition ON, with a scan tool, clear DTC. Verify DTC B1000 is not set as current in the PPS.

  1. If DTC is set as a current DTC, replace the PPS.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for PPS replacement, setup, and programming

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) stores a primary data key, which is a 4-digit number, and a secondary data key, which is a portion of the vehicle identification number (VIN). When the ignition is turned ON, the SDM compares this information to the information stored in the body control module (BCM) over the serial data communication circuit. 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 commands the AIR BAG indicator ON.
  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»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  5. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

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 and BCM replacement, setup, and programming

  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The passenger air bag ON/OFF indicators are used to notify the driver when the Passenger Presence System (PPS) has enabled or disabled the I/P inflator module. 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 turn ON the indicators as necessary.

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

Ignition voltage is between 9-16 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 the PPS indicator is present due to loss of power at indicator.
  2. The vehicle is not configured for PPS and the SDM detects that the PPS indicator is present.
  1. The SDM commands the AIR BAG warning lamp ON.
  2. The SDM disables all deployments when B1019 00 DTC is set as current.
  1. The correct SDM must be installed.
  2. The correct components must be installed.
  3. The PPS indicator operates as indicated in the «SIR System Description and Operation»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) .

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

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__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»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) .
  2. If equipped with PPS, verify the appropriate PPS indicator segments illuminate by occupying and un-occupying the passenger seat. If the PPS indicator segments do not illuminate properly, refer to «Passenger Presence System Indicator Circuit Malfunction»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) .
IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected. The PPS module SDM The PPS module wiring harness connector SDM wiring harness connector

B1019 00

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

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

  1. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM or BCM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using the diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) 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 commands the AIR BAG indicator ON via serial data communications.
  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 responsible for setting the DTC no longer exists.
  2. A history DTC will clear once 255 malfunction-free ignition cycles have occurred.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  3. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)
  4. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__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 IGN 1 AIR BAG 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»(/cadillac/dts/i-2005-2011/remont/body-electrical/#wiring-systems-and-power-management-dtc-b0005-to-dtc-b1433) .
  3. Ignition OFF, disconnect the harness connector at the SDM.
  4. Ignition OFF, disconnect the X2 harness connector at the IP fuse block.
  5. Ignition OFF, test for less then 1 ohm of resistance between the ignition 1 voltage circuit terminal 32 and the IP fuse block terminal 10 (X2). If greater then the specified range, test the circuit for an open/high resistance.
  6. Ignition ON, test for less then 1 volt between the ignition 1 voltage circuit terminal 32 and the IP fuse block terminal 10 (X2). 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. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for SDM replacement, setup, and programming
  2. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)

Introduction

The Inflatable Restraints Passenger Presence System (PPS) is a calibrated system that requires rezeroing anytime the seat cushion trim attachments have been removed or the PPS has been replaced. The procedures below are designed to assist in the rezeroing of the PPS. Before you start, read these procedures carefully and completely. For further information regarding the PPS refer to SIR System Description and Operation .

IMPORTANTThe following procedures must be followed
  1. Read this procedure carefully and completely.
  2. The PPS will not function properly if the PPS rezeroing procedure is not performed.
  3. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) after successfully completing the rezeroing procedure to ensure the system is functioning properly.

Passenger Presence System (PPS) Rezeroing Procedure

IMPORTANTBefore rezeroing the PPS, 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 PPS.
  1. Empty the front outboard passenger seat.
  2. Verify that all SIR and PPS components, connectors, and connector position assurances (CPAs) are properly connected and mounted.
  3. Install a scan tool.
  4. Turn ON the ignition, with the engine OFF.
  5. Use the scan tool in order to clear the SIR and PPS DTCs.
  6. With a scan tool, request the PPS rezeroing procedure.
  7. Initiate the PPS rezeroing procedure. The PPS will illuminate both PASSENGER AIR BAG ON and OFF indicators until the rezeroing procedure has been completed.
  8. When the rezeroing procedure has been successfully completed, the PPS will display the current system status.
  9. If the rezeroing procedure was unsuccessful, repeat this procedure. Due to the communication status between the SDM and the PPS module, this procedure may have to be repeated until a successful rezero attempt has been achieved.
  10. After the PPS has been successfully rezeroed, perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) .

Symptoms - SIR

IMPORTANTComplete the following steps before using the symptom tables
  1. Perform «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) 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»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) .

Visual/Physical Inspection

  1. Inspect for aftermarket devices which could affect the operation of the SIR system. Refer to «Checking Aftermarket Accessories»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__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. «Air Bag Indicator Circuit Malfunction»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) in order to diagnose the symptom.
  2. «Passenger Presence System Indicator Circuit Malfunction»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) in order to diagnose the symptom.
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__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 turn the air bag indicator ON with no DTCs present, then disables all deployment loops.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__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»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) .
  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»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__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»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  2. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for IPC and SDM replacement, setup, and programming
  1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) prior to using this diagnostic procedure.
  2. Review «Strategy Based Diagnosis»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
  3. «Diagnostic Procedure Instructions»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__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
No indicators will illuminate. The OFF indicator will not illuminate. The ON indicator will not illuminate. The OFF indictor will illuminate any time the ignition is ON. 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 I/P inflator module. 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 turn ON the indicators as necessary.

Schematic Reference

Connector End View Reference

Description and Operation

Electrical Information Reference

  1. «Circuit Testing»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
  2. «Connector Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
  3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__testing-for-intermittent-conditions-poor)
  4. «Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__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. Apply enough weight on the passenger seat to change the parameter display to Small. The passenger air bag OFF indicator should remain illuminated.
  4. Apply additional weight to change the parameter display to Large. The passenger air bag indicator should switch from OFF to ON within 5 seconds.
IMPORTANTWhen removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected. Inflatable restraint passenger air bag on/off indicator. Inflatable restraint 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. «Inflatable Restraint Instrument Panel Module Indicator Replacement»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system)
  2. «SIR/SRS Wiring Repairs»(/cadillac/dts/i-2005-2011/remont/ignition-switchsteering-lock/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
  3. «Control Module References»(/cadillac/dts/i-2005-2011/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) instrument panel cluster (IPC) replacement, setup, and programming

SIR Disabling & 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 removing or replacing an SIR component or a component attached to an SIR component.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

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

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

  1. Inflatable restraint sensing and diagnostic module (SDM)
  2. Any Inflatable restraint air bag module
  3. Inflatable restraint steering wheel module coil
  4. Any Inflatable restraint sensor
  5. Inflatable restraint seat belt pretensioners
  6. Inflatable restraint Passenger Presence System (PPS) module or 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»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) or «Electrical Center Identification Views»(/cadillac/dts/i-2005-2011/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-component-connector-end-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»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system) or «Electrical Center Identification Views»(/cadillac/dts/i-2005-2011/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-component-connector-end-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»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) .

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»(/cadillac/dts/i-2005-2011/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»(/cadillac/dts/i-2005-2011/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»(/cadillac/dts/i-2005-2011/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-system-check-vehicle) .
CAUTIONWhen 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.

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

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

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

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

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

Scheme 6

Scheme 6: Inflatable Restraint Front End Sensor Replacement
Scheme 6: Inflatable Restraint Front End Sensor Replacement
CalloutComponent Name
CAUTION: Do not strike or jolt the inflatable restraint front end sensor. Before applying power to the front end sensor make sure that it is securely fastened. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs. NOTE: Refer to Fastener Notice . Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedure: Disable the supplemental inflatable restraint (SIR) system. Refer to SIR Disabling and Enabling .
1Forward Discriminating Sensor Bolt (Qty: 2) Tip: Loosen the bolts in order to remove the sensor. Tighten: 8 N.m (71 lb in)
2Forward Discriminating Sensor Tip: Remove the connector position assurance (CPA) retainer. Disconnect the electrical connector.
CAUTION
Do not strike or jolt the inflatable restraint front end sensor. Before applying power to the front end sensor make sure that it is securely fastened. Failure to observe the correct installation procedure could cause SIR deployment, personal injury, or unnecessary SIR system repairs.
NOTE
Refer to Fastener Notice .

Scheme 7

Scheme 7: Inflatable Restraint Side Impact Sensor Replacement
Scheme 7: Inflatable Restraint Side Impact Sensor Replacement
CalloutComponent Name
CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs. CAUTION: 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. Refer to SIR Disabling and Enabling . Remove the center pillar garnish molding. Refer to Center Pillar Lower Garnish Molding Replacement .
1Inflatable Restraint Side Impact Sensor Assembly Bolt (Qty: 2) NOTE: Refer to Fastener Notice . Procedure: Loosen the bolts and slide the sensor out of the key hole slots. Tighten: 9 N.m (80 lb in)
2Inflatable Restraint Side Impact Sensor Assembly
CAUTION
When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs.
CAUTION
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.
NOTE
Refer to Fastener Notice .

Scheme 8

Scheme 8: Inflatable Restraint Sensing & Diagnostic Module Replacement
Scheme 8: Inflatable Restraint Sensing & Diagnostic Module Replacement
CalloutComponent Name
CAUTION: When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs. CAUTION: 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. NOTE: Refer to Fastener Notice . Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedure Disable the SIR. Refer to SIR Disabling and Enabling . Remove the center console. Refer to Console Replacement .
1Inflatable Restraint Sensing and Diagnostic Module Nut (Qty: 3) Tighten: 10 N.m (89 lb in)
2Inflatable Restraint Sensing and Diagnostic Module Tip: Reprogram the inflatable restraint sensing and diagnostic module after installation. Refer to Control Module References .
CAUTION
When performing service on or near the SIR components or the SIR wiring, the SIR system must be disabled. Refer to SIR Disabling and Enabling. Failure to observe the correct procedure could cause deployment of the SIR components, personal injury, or unnecessary SIR system repairs.
CAUTION
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.
NOTE
Refer to Fastener Notice .

Scheme 9

Scheme 9: Inflatable Restraint Steering Wheel Module Replacement
Scheme 9: Inflatable Restraint Steering Wheel Module Replacement
CalloutComponent Name
CAUTION: Refer to SIR Inflator Module Handling and Storage Caution . CAUTION: Refer to SIR Caution . Preliminary Procedures Disable the supplemental inflatable restraint (SIR) system. Refer to SIR Disabling and Enabling . Locate tool access hole on side of steering wheel. Using a blunt-ended tool, push the spring fastener inward through the access hole. Repeat the step for the other opening.
1Steering Wheel Inflatable Restraint Module Tip: Remove the connector position assurance (CPA) retainer. Disconnect the electrical connectors. Fully deploy the module before disposal. If the module was replaced under warranty, fully deploy and dispose of the module after the required retention period. Refer to Inflator Module Handling and Scrapping .
CAUTION
Refer to SIR Caution .

Scheme 10

Scheme 10: Inflatable Restraint Steering Wheel Module Coil Replacement
Scheme 10: Inflatable Restraint Steering Wheel Module Coil Replacement
CalloutComponent Name
NOTE: The new SIR coil assembly will be centered. Improper alignment of the SIR coil assembly may damage the unit, causing an inflatable restraint malfunction. Preliminary Procedure: Remove the steering column trim covers. Refer to Steering Column Trim Covers Replacement .
1Inflatable Restraint Steering Wheel Module Coil Retaining Ring
2Inflatable Restraint Steering Wheel Module Coil Procedure: Disconnect any electrical connectors as needed. Tip: Ensure the inflatable restraint steering wheel module coil washer does not need to be replaced and is installed correctly before reinstalling the coil. If reusing the inflatable restraint steering wheel module coil it must centered before reinstalling it. Refer to Inflatable Restraint Steering Wheel Module Coil Centering .
NOTE
The new SIR coil assembly will be centered. Improper alignment of the SIR coil assembly may damage the unit, causing an inflatable restraint malfunction.

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 assembly is in the LOCK position.
  2. If the front (5) of the SIR coil has a centering window (4), and the back side (2) has a spring service lock (1), perform the following steps: Hold the 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 the 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) has NO spring service lock, perform the following steps: Hold the coil with the face up. Rotate the coil hub clockwise until the coil ribbon stops. Rotate the coil hub slowly, 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 coil with the horn tower and slide the coil onto the steering shaft assembly.
  4. If no centering window is present on the front side (3) of the SIR coil, but a spring service lock (1) is on the back side (2), perform the following steps: Hold the 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 the locking tabs. The SIR coil is now centered. Align the centered coil with the horn tower and slide the coil onto the steering shaft assembly.
  5. If no centering window appears on the front side (2) of the SIR coil and no spring service lock exists on the back side (1), perform the following steps: Hold the 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 coil with the horn tower and slide the coil onto the steering shaft assembly.

Scheme 11

Scheme 11: Inflatable Restraint Instrument Panel Module Replacement
Scheme 11: Inflatable Restraint Instrument Panel Module Replacement
CalloutComponent Name
CAUTION: Refer to SIR Caution . CAUTION: Refer to SIR Inflator Module Handling and Storage Caution . NOTE: Refer to Fastener Notice . Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedure 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 Bolt (Qty: 4) Tighten: 10 N.m (89 lb in)
2Inflatable Restraint I/P Module Assembly
CAUTION
Refer to SIR Caution .
NOTE
Refer to Fastener Notice .

Scheme 12

Scheme 12: Inflatable Restraint Seat Position Sensor Replacement
Scheme 12: Inflatable Restraint Seat Position Sensor Replacement
CalloutComponent Name
CAUTION: Refer to SIR Caution . NOTE: Refer to Fastener Notice . Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedures Disable the SIR system. Refer to SIR Disabling and Enabling . Remove the front passenger seat. Refer to Seat Replacement . Re-zero the inflatable restraint passenger presence system whenever the seat cushion or any component of the passenger presence system is removed. Refer to Control Module References .
1Screw, Inflatable Restraint Front Passenger Position Sensor (Qty: 2) Tighten: 3 N.m (25 lb in)
2Sensor Assembly, Inflatable Restraint Front Passenger Position Tip: Disconnect the electrical connector.
CAUTION
Refer to SIR Caution .
NOTE
Refer to Fastener Notice .

Scheme 13

Scheme 13: Inflatable Restraint Passenger Presence System Replacement - Front
Scheme 13: Inflatable Restraint Passenger Presence System Replacement - Front
CalloutComponent Name
CAUTION: Refer to SIR Caution . CAUTION: 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. CAUTION: To avoid personal injuries, re-zero the passenger presence system whenever you remove or replace the seat cushion or trim. Failure to do so may cause the system to malfunction. Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedures Disable the SIR system. Refer to SIR Disabling and Enabling . Remove the front passenger seat. Refer to Seat Replacement . Remove the front passenger seat cushion cover and pad. Refer to Seat Cushion Trim Cover and Pad Replacement . Remove the front passenger seat cushion frame. Refer to Front Seat Cushion Frame Replacement . Re-zero the inflatable restraint passenger presence system whenever the seat cushion or any component of the passenger presence system is removed. Refer to Control Module References for replacement and setup information.
1Cover, Passenger Seat Cushion Pad Refer to Seat Cushion Trim Cover and Pad Replacement .
2Retainer, Inflatable Restraint Front Passenger Presence Sensor (Qty: 2)
3Sensor Assembly, Inflatable Restraint Front Passenger Presence Tip: Note the routing of the wiring harness and connector location for installation. Disconnect the electrical connector. Remove the retaining cap for the seat cushion blower if equipped.
4Frame, Passenger Seat Cushion Pad Refer to Front Seat Cushion Frame Replacement .
5Rivet, Inflatable Restraint Front Passenger Presence Module (Qty: 2) Tip: Drill out the rivets to remove the module and reinstall with new rivets.
6Module, Inflatable Restraint Front Passenger Presence Tip: Disconnect the electrical connector.
CAUTION
Refer to SIR Caution .
CAUTION
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.
CAUTION
To avoid personal injuries, re-zero the passenger presence system whenever you remove or replace the seat cushion or trim. Failure to do so may cause the system to malfunction.

Scheme 14

Scheme 14: Inflatable Restraint Side Impact Module Replacement - Front
Scheme 14: Inflatable Restraint Side Impact Module Replacement - Front
CalloutComponent Name
CAUTION: 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. NOTE: Refer to Fastener Notice . Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedure Disable the SIR system. Refer to SIR Disabling and Enabling . Remove the front seat. Refer to Seat Replacement . Remove the seat back cushion finish panel. Refer to Driver Seat and Passenger Seat Back Cushion Finish Panel Replacement .
1Nut, Side Impact Inflatable Restraint (Qty: 2) Tighten: 5 N.m (44 lb in)
2Module Assembly, Inflatable Restraint Tip: 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 Inflator Module Handling and Scrapping .
CAUTION
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.
NOTE
Refer to Fastener Notice .

Scheme 15

Scheme 15: Inflatable Restraint Side Impact Module Wiring Harness Replacement
Scheme 15: Inflatable Restraint Side Impact Module Wiring Harness Replacement
CalloutComponent Name
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedure Disable the SIR system. Refer to SIR Disabling and Enabling . Remove the front seat. Refer to Seat Replacement . Remove the inflatable restraint side impact module front. Refer to Inflatable Restraint Side Impact Module Replacement - Front . Remove the seat back front panel. Refer to Driver Seat and Passenger Seat Back Cushion Finish Panel Replacement .
1Inflatable Restraint Side Impact Module Wiring Harness

Scheme 16

Scheme 16: Inflatable Restraint Instrument Panel Module Indicator Replacement
Scheme 16: Inflatable Restraint Instrument Panel Module Indicator Replacement
CalloutComponent Name
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedure: Remove the overhead console. Refer to Roof Console Replacement .
1Indicator Assembly, Inflatable Restraint Instrument Panel Module Tip: Release the tabs to remove the module from the overhead console.

Scheme 17

Scheme 17: Roof Side Rail Inflatable Restraint Module Replacement
Scheme 17: Roof Side Rail Inflatable Restraint Module Replacement
CalloutComponent Name
CAUTION: 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. CAUTION: Refer to SIR Caution . CAUTION: Refer to SIR Inflator Module Handling and Storage Caution . NOTE: Refer to Fastener Notice . Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedure 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 Garnish Molding Replacement . Remove the sail panel. Refer to Sail 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 Tip: Mandatory Tightening Sequence Tighten: 9 N.m (80 lb in)
2Inflatable Restraint Roof Side Rail Module Assembly
3Assist Handle Bracket Assembly
CAUTION
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.
CAUTION
Refer to SIR Caution .
NOTE
Refer to Fastener Notice .

Scheme 18

Scheme 18: Seat Belt Retractor Pretensioner Replacement - Front
Scheme 18: Seat Belt Retractor Pretensioner Replacement - Front
CalloutComponent Name
CAUTION: Refer to SIR Caution . CAUTION: 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. NOTE: Refer to Fastener Notice . Fastener Tightening Specifications: Refer to Fastener Tightening Specifications . Preliminary Procedure Disable the SIR. Refer to SIR Disabling and Enabling . Remove the front seat. Refer to Seat Replacement . Remove the panel assembly and B-pillar trim. Refer to Center Pillar Upper Garnish Molding Replacement and Center Pillar Lower Garnish Molding Replacement .
1Seat Belt Retractor Anchor Plate Assembly Tip: Use a flat-bladed tool to disengage the retaining clip. Remove trim panel from side of seat to remove the seat belt.
2Seat Shoulder Belt Guide Bolt Tighten: 47 N.m (35 lb ft)
3Seat Belt, Push On Retainer Tip: Use a flat bladed tool to remove locking pin in retainer.
4Intermediate Guide
5Seat Shoulder Belt Retractor Screw Tighten: 47 N.m (35 lb ft)
6Retractor Belt Assembly
CAUTION
Refer to SIR Caution .
CAUTION
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.
NOTE
Refer to Fastener Notice .

Accident With or Without Air Bag Deployment - Component Inspections

CAUTIONProper operation of the 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 in a collision or deployment for conditions less severe than intended.

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

  1. Steering column-Perform the steering column accident damage checking procedures. Refer to «Steering Column Accident Damage Inspection»(/cadillac/dts/i-2005-2011/remont/steering-column-switches/#steering-wheel-steering-column) .
  2. Instrument panel (I/P) knee bolsters and mounting points-Inspect the knee bolsters for bending, twisting, buckling, or any other type of damage.
  3. I/P brackets, braces, etc.-Inspect for bending, twisting, buckling, or any other type of damage.
  4. Seat belts-Perform the seat belt operational and functional checks. Refer to «Operational and Functional Checks»(/cadillac/dts/i-2005-2011/remont/restraints-control-systems/#seat-belt-system__operational-functional-checks) .
  5. Seats and seat mounting points-Inspect for bending, twisting, buckling, or any other type of damage.
  6. Passenger seat bottom with passenger presence system (PPS)-Check for any dtcs or problems that may cause the PPS not to function properly.
  7. The roof and headliner mounting points.

Frontal Inflator Module Deployment

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

IMPORTANTThe front passenger seat is equipped with a PPS, which detects an occupant. If the requirements for disabling the I/P air bag are met then the PPS will communicate with the sensing and diagnostic module (SDM) to disable/turn OFF the I/P air bag, even in a accident. For more information on the PPS refer to SIR System Description and Operation .
  1. Inflatable restraint I/P module, if deployed and after performing the necessary inspections listed above
  2. Inflatable restraint steering wheel module
  3. Inflatable restraint SDM
  4. Inflatable restraint front end sensor, left/right
  5. Inflatable restraint seat belt pretensioners

Perform additional inspections on the following components.

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

Accident With Side Air Bag Deployment - Component Replacement & Inspections

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

  1. Inflatable restraint side impact sensors (SIS), left/right, on the side of the impact
  2. Inflatable restraint roof rail module, left/right, on the side of the impact
  3. Inflatable restraint SDM
  4. Inflatable restraint seat belt pretensioner

Perform additional inspections on the following components.

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

Inflator Module Handling & Scrapping

Tools Required

  1. SA9207Z-A or J 38826 SIR Deployment Harness. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  2. SA9413NE or J 39401-B SIR Deployment Fixture. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  3. An appropriate pigtail adapter

Live and Undeployed Inflator Module

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

Dual Stage Inflator Module

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

Scrapping Procedure

During the course of a vehicle's useful life, certain situations may arise which will require the disposal of a live and undeployed inflator module. Do NOT dispose a live and undeployed inflator module through normal disposal channels until the inflator module has been deployed.

Do not deploy the inflator module in the following situations

  1. After replacement of an inflator module under warranty - the inflator module may need to be returned undeployed to the manufacturer.
  2. If the vehicle is the subject of a product liability 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 inflator modules - follow the instructions in the Campaign Service Bulletin for proper SIR handling procedures.

Deployment Procedures

You can deploy the inflator module 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 Module, I/P Module & Roof Rail Module

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

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

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

  1. Turn OFF the ignition.
  2. Remove the inflator module.
  3. Clear a space on the ground about 1.85 m (6 ft) in diameter for deployment of the inflator module or deployment fixture. If possible, use a paved, outdoor location free of activity. Otherwise, use a space free of activity on the shop floor. Ensure you have sufficient ventilation.
  4. Clear the area of loose or flammable objects.
  5. If you are deploying a steering wheel inflator module, place the inflator module in the center of the space with the vinyl trim cover facing up and away from the surface.
  6. When deploying an I/P inflator module, perform the following instructions: Place the SA9413NE or J 39401-B in the center of the cleared area. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . Fill the deployment fixture with water or sand. Using the proper nuts and bolts, mount the I/P module (1) to the deployment fixture (2), with the vinyl trim facing up. Securely tighten all fasteners that hold the I/P module (1) to the deployment fixture (2).
  7. When deploying a roof rail module, perform the following instructions: Place the SA9413NE or J 39401-B (3) in the center of the cleared area. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . 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 module in the deployment fixture and securely tighten all fasteners.
  8. Inspect the SA9207Z-A or J 38826 and the appropriate pigtail adapter (2) for damage. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . 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 inflator module (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 12V 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 Inflator module will occur when contact is made.
  17. Disconnect the SIR deployment harness from the power source after the inflator module deploys.
  18. If the inflator module 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 inflator module as soon as possible.
  22. Inspect the pigtail adapter and the SIR deployment harness. Replace as needed.
  23. Dispose of the deployed inflator module through normal refuse channels.
  24. Wash your hands with a mild soap.

Deployment Inside Vehicle - Vehicle Scrapping Procedure

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

  1. The vehicle has completed all useful life.
  2. Irreparable damage occurred to the vehicle in a non-deployment type accident.
  3. Irreparable 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 inflator modules which will be deployed are mounted securely.
  4. Remove all loose objects from the front seats.
  5. Disconnect the steering wheel module 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 gage) 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 inflator module.
  11. Twist together the 2 connector wire leads from the high circuits from both stages of the steering wheel module, to one set of deployment wires. Refer to «Component Connector End Views»(/cadillac/dts/i-2005-2011/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-component-connector-end-views) 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 module, to one set of deployment wires. Refer to «Component Connector End Views»(/cadillac/dts/i-2005-2011/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-component-connector-end-views) 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 module.
  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 gage) 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 module.
  29. Route the deployment harness out of the driver side of the vehicle.
  30. Disconnect the I/P module 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 gage) 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 I/P module to one set of deployment wires. Refer to «Component Connector End Views»(/cadillac/dts/i-2005-2011/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-component-connector-end-views) 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 I/P module to one set of deployment wires. Refer to «Component Connector End Views»(/cadillac/dts/i-2005-2011/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-component-connector-end-views) 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 I/P module 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 gage) 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 module 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, 12V 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 inflator module.
  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 inflator modules did not deploy, remove the undeployed modules from the vehicle.

Pretensioner Handling & Scrapping

Tools Required

  1. J 39401-B or SA9413NE SIR Deployment Fixture. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  2. J 38826 or SA9207Z-A SIR Deployment Harness. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .

Scheme 19

Scheme 19
Scheme 19
CAUTIONWhen you are carrying an undeployed seat belt pretensioner: Do not carry the seat belt pretensioner by the wires or connector on the pretensioner. Do not touch the seat belt pretensioner in the area of the cable (1). Do not cover the tube opening with your hand. Keep the open end of the tube pointed away from you. Do not point the open end of the tube at another person. When the pretensioner deploys the cable retracts. This shortens the pretensioner between the buckle and the mounting bolt. Grasp the pretensioner by the piston tube (2). Disregarding these precautions may result in personal injury or unnecessary SIR system repairs.

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

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

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

Deployment Inside the Vehicle

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

Deployment Outside Vehicle for Seat Belt Pretensioners

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

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

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

CAUTIONIn 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.
CAUTIONWhen 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. Turn the ignition switch to the OFF position.
  2. Remove the seat belt pretensioner from the vehicle.
  3. When carrying a pretensioner to the deployment area keep the open end of pretensioner pointed away from the body.
  4. 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.
  5. Make sure no loose or flammable objects are in the area.
  6. Place the J 39401-B or SA9413NE in the center of the cleared area. See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) .
  7. Fill the fixture plastic reservoir with water or sand.
  8. Mount the module (1) in the SIR deployment fixture (3) with the open end facing up using the following mounting method. Adjust and secure the J 39401-B or SA9413NE arms (4) to the deployment fixture (3). See «Special Tools»(/cadillac/dts/i-2005-2011/remont/airbag/#supplemental-inflatable-restraint-system__special-tools) . 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.
  9. Inspect the J 38826 or SA9207Z-A and the appropriate pigtail adapter for damage. Replace as needed.
  10. Short the 2 SIR deployment harness (1) leads together using one banana plug seated into the other.
  11. Connect the appropriate pigtail adapter (2) to the SIR deployment harness (1).
  12. Extend the SIR deployment harness and adapter to full length from the deployment fixture.
  13. Connect the pretensioner (1) to the adapter (2) on the deployment harness (3).
  14. Clear the area of people.
  15. Separate the 2 banana plugs on the SIR deployment harness.
  16. Place a 12V minimum/2A minimum power source (i.e., vehicle battery) near the shorted end of the harness.
  17. Connect the SIR deployment harness wires to the power source. Pretensioner deployment will occur when contact is made.
  18. Disconnect the SIR deployment harness from the power source after the pretensioner deploys.
  19. Seat one banana plug into the other in order to short the deployment harness leads.
  20. If the pretensioner did not deploy, disconnect the adapter and discontinue the procedure. Contact the Technical Assistance Group. Otherwise, proceed to the following steps.
  21. Put on a pair of shop gloves.
  22. Disconnect the pigtail adapter from the pretensioner as soon as possible.
  23. Inspect the pigtail adapter and the SIR deployment harness. Replace as needed.
  24. Dispose of the deployed pretensioner through normal refuse channels.
  25. Wash hands with a mild soap.

Scheme 20

Scheme 20: SIR System Overview
Scheme 20: SIR System Overview

The supplemental inflatable restraint (SIR) system supplements the protection offered by the occupants Seat Belt System (2). The SIR system may contain several inflator modules located throughout the vehicle, i.e. steering wheel module (1), instrument panel (I/P) module (1), or roof rail modules. In addition to inflator modules, the vehicle may contain seat belt pretensioners that tighten the seat belt in the event of a collision, thus reducing the distance between the occupant and the seat belt when an inflator module is deployed. Each inflator module has a deployment loop that is controlled by the sensing and diagnostic module (SDM) mounted inside the vehicle. The SDM determines the severity of a collision with the assistance of various sensor inputs located at strategic points on the vehicle. When the SDM detects a collision, it will process the information provided by the sensors to further support air bag or pretensioner deployment. The SDM will deploy the frontal air bags and pretensioners if it detects a collision of sufficient force. If the force of the impact is not sufficient to warrant inflator module deployment, the SDM may still deploy the seat belt pretensioners. The SDM performs continuous diagnostic monitoring of the SIR system electrical components. Upon detection of a circuit malfunction, the SDM will set a DTC and inform the driver by turning the AIR BAG indicator ON. The steering column (1) and knee bolsters (3) are designed to absorb energy and compress during frontal collisions in order to limit leg movement and decrease the chance of injury to the driver and passenger.

Frontal SIR System Description

The frontal supplemental inflatable restraint (SIR) system consists of the following components

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

A frontal collision of sufficient force will deploy the frontal air bags and/or pretensioners. The sensing and diagnostic module (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, I/P module, steering wheel module, steering wheel module coil, seat belt retractor pretensioners, and the connecting wires make up the frontal deployment loops. The SDM continuously monitors the deployment loops for malfunctions and turns the AIR BAG indicator ON if a fault is detected.

Inflatable Restraint Sensing & Diagnostic Module (SDM)

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

Inflatable Restraint Passenger Presence System

IMPORTANTThe passenger presence system (PPS), heated seat element (if equipped), 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 rezeroed in order to function properly.

The PPS is used to monitor the weight 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) inflator module. The PPS consist of an electronic control module, sensor mat, heated seat element (if equipped), wiring harness, and PASSENGER AIR BAG ON/OFF indicators. The sensor 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 sensor determines that the occupant 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 sensor determines the occupant weight is higher than a specified value, the PPS module will send an enable signal to the SDM to enable the I/P. The PPS module will notify the customer of the enable/disable status by turning on one of the PASSENGER AIR BAG ON/OFF indicators located in the center of the instrument panel cluster (IPC). The PPS monitors itself for faults and will display flash diagnostic trouble codes (DTCs) when a fault is detected and the SDM commands it by using the PASSENGER AIR BAG ON/OFF indicators. The PPS will also notify the SDM of a fault and the SDM will request the IPC to turn the AIR BAG indicator located on the IPC ON. To determine what DTCs have been set by the PPS, the scan tool is used to command the SDM to request the PPS to flash the DTCs using the PASSENGER AIR BAG ON/OFF indicators located on the I/P.

Inflatable Restraint PASSENGER AIR BAG ON/OFF indicator

The PASSENGER AIR BAG ON/OFF indicators is used to notify the driver and passenger when the I/P and the right front air bag is enable or disable.

AIR BAG Indicator

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

Dual Stage Inflator Modules

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

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

Inflatable Restraint Seat Belt Retractor Pretensioners

The seat belt retractor pretensioners consist of a housing, a seat belt retractor, the seat belt webbing, an initiator, and a canister of gas generating materials. The initiator is part of the seat belt pretensioner deployment loop. When the vehicle is involved in a collision of sufficient force, the sensing and diagnostic module (SDM) 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 and retracts the seat belt webbing, which removes all of the slack in the seat belts. Depending on the severity of the collision, the seat belt pretensioners may deploy without the frontal inflator modules deploying, or they will deploy immediately before the frontal inflator modules deploy. Each seat belt pretensioner is equipped with a shorting bar that is located in the connector of the seat belt pretensioner. The shorting bar shorts the seat belt pretensioner circuitry to prevent unwanted deployment of the seat belt pretensioner when the connector is disconnected.

Inflatable Restraint Steering Wheel Module Coil

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

Steering Column & Wheel

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

Knee Bolster

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

Side SIR System Description

The side supplemental inflatable restraint (SIR) system consists of the following components

  1. AIR BAG indicator located in the instrument panel cluster (IPC)
  2. Inflatable restraint sensing and diagnostic module (SDM)
  3. Inflatable restraint side impact sensors (SIS)
  4. Inflatable restraint roof rail modules
  5. Inflatable restraint wiring harnesses

Inflatable Restraint Roof Rail Modules

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

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

Inflatable Restraint Side Impact Sensor (SIS)

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

Inflatable Restraint Wiring Harness

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

Special Tools

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

Scheme 21

Scheme 21: Special Tools
Scheme 21: Special Tools

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Circuit Testing
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Connector Repairs
• Control Module References
• Diagnostic Repair Verification
• SIR/SRS Wiring Repairs
• Diagnostic Trouble Code (DTC) List - Vehicle
• Front Seat Belt Buckle Replacement
• DTC B1370
• Checking Aftermarket Accessories
• Battery Negative Cable Disconnection and Connection
• Fastener Notice
• Center Pillar Lower Garnish Molding Replacement
• Console Replacement
• SIR Inflator Module Handling and Storage Caution
• SIR Caution
• Steering Column Trim Covers Replacement
• Seat Replacement
• Fastener Tightening Specifications
• Headlining Trim Panel Replacement
• Fastener Tightening Specifications
• Operational and Functional Checks
• SIR Inflator Module Disposal Caution
• SIR Deployed Inflator Modules Are Hot Caution
• SIR Inflatable Module Deployment Outside Vehicle Caution
• SIR Disabling and Enabling
• DTC B0012 or B0013
• Special Tools
• SIR Identification Views
• Fastener Tightening Specifications
• Inflator Module Handling and Scrapping
• Inflatable Restraint Steering Wheel Module Coil Centering