Supplemental Inflatable Restraint System Cadillac ELR I

Fastener Tightening Specifications

Fastener Tightening Specifications

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category

Diagnostic Fault Information

Circuit/System Description

During a frontal crash of sufficient force the Inflatable Restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy the Steering Wheel Air Bag. The Inflatable Restraint Sensing and Diagnostic Module 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 Air Bag coil connector which will short together both Steering Wheel Air Bag stage 1 high control circuit and Steering Wheel Air Bag stage 1 low control circuit and both Steering Wheel Air Bag stage 2 high control circuit and Steering Wheel Air Bag stage 2 low control circuit when the connector is disconnected. This will help to prevent unwanted deployment of the Steering Wheel Air Bag during servicing.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

B0012 01 stage 1 or B0013 01 stage 2

The Steering Wheel Air Bag deployment loop is shorted to voltage for 2 seconds.

B0012 02 stage 1 or B0013 02 stage 2

The Steering Wheel Air Bag deployment loop is shorted to ground for 2 seconds.

B0012 04 stage 1 or B0013 04 stage 2

The Steering Wheel Air Bag deployment loop is open for 2 seconds.

B0012 0D stage 1 or B0013 0D stage 2

The Steering Wheel Air Bag deployment loop resistance is greater than 4.4 ohms for 2 seconds.

B0012 0E stage 1 or B0013 0E stage 2

The Steering Wheel Air Bag deployment loop resistance is less than 1.7 ohms for 2 seconds.

Action Taken When the DTC Sets

1. The Inflatable Restraint Sensing and Diagnostic Module requests the instrument cluster to illuminate the AIR BAG indicator.
2. The Inflatable Restraint Sensing and Diagnostic Module will store a DTC, however if an event occurs the system will still attempt deployment.

Conditions for Clearing the DTC

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

Diagnostic Aid

Note. The following diagnostic aids apply for both current and history DTCs.

A worn Steering Wheel Air Bag coil can cause a repeated history DTC to set. To verify this condition, turn the steering wheel 360 degrees in one direction then back 360 degrees in the other direction, multiple times, while viewing the scan tool Deployment Loop Resistance parameters.

An incorrectly installed CPA or incorrectly seated connector can cause a shorting bar to short both control circuits together. Check the connectors and CPAs if a DTC with symptom byte 02 or 0E is set, to ensure the shorting bars are not causing the circuits to be shorted together. Shorting bars are used in the locations listed below

1. Steering Wheel Air Bag assembly
2. Steering Wheel Air Bag Coil assembly
3. Inline connectors - on the Steering Wheel Air Bag side of the harness connector
4. Harness side of the Inflatable Restraint Sensing and Diagnostic Module connector

Terminal fretting or incorrectly seated connector can cause an open/high resistance condition. Check the circuit terminals for fretting or incorrectly seated connector if a DTC with symptom byte 04 or 0D is set.

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-38125-580 Terminal Release Tool Kit

Circuit/System Verification

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

1. Verify the scan tool Deployment Loop Resistance parameters stay consistently between 2.1 and 4.0 ohms without any spikes or dropouts while turning the steering wheel 360 degrees in one direction then back 360 degrees in the other direction. If less than 2.1 or greater than 4.0 ohms Refer to Circuit/System Testing. If there are spikes or dropouts Replace the X85 Steering Wheel Air Bag Coil. If within 2.1 and 4.0 ohms without any spikes or dropouts
2. Verify DTC B0012 or B0013 is set as a current DTC. If the DTC is set as current Refer to Circuit/System Testing. If the DTC is set as history
3. Verify the scan tool Deployment Loop Resistance parameters stay consistently between 2.1 and 4.0 ohms without any drop outs or spikes while moving the harness near each connector listed below. X85 Steering Wheel Air Bag Coil F107 Steering Wheel Air Bag Any harness inline K36 Inflatable Restraint Sensing and Diagnostic Module If the reading is erratic while moving the harness, perform the following Inspect each connector terminal for damage or corrosion and repair as necessary. Apply dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087) to each connector terminal. Insure each connector and CPA is correctly seated. If within 2.1 and 4.0 ohms without any spikes or dropouts
4. All OK

Circuit/System Testing

1. Vehicle OFF and all vehicle systems OFF, disconnect the X1 harness connector at the F107 Steering Wheel Air Bag. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for greater than 25 ohms between the control circuit terminals 1 and 2 (Stage 1) or terminals 4 and 5 (Stage 2). If 25 ohms or less Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. NOTE: Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar, or terminal when depressing the shorting bar. Test for infinite resistance between the two control circuits. If less than infinite resistance, repair the short between the two circuits. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 25 ohms
3. Vehicle in Service Mode.
4. Test for less than 11 V between the control circuit terminals listed below and ground: Control circuit terminal 1 (Stage 1) Control circuit terminal 2 (Stage 1) Control circuit terminal 4 (Stage 2) Control circuit terminal 5 (Stage 2) If 11 V or greater Vehicle OFF, disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, vehicle in Service Mode. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 11 V
5. Vehicle OFF.
6. Test for greater than 25 ohms between the control circuit terminals listed below and ground: Control circuit terminal 1 (Stage 1) Control circuit terminal 2 (Stage 1) Control circuit terminal 4 (Stage 2) Control circuit terminal 5 (Stage 2) If 25 ohms or less Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 25 ohms
7. Install a 3 A fused jumper wire between the control circuit terminals 1 and 2 (Stage 1) or terminals 4 and 5 (Stage 2).
8. Vehicle in Service Mode, verify the scan tool Deployment Loop Resistance parameter is consistently less than 2 ohms while turning the steering wheel 360 degrees in one direction then back 360 degrees in the other direction. If the reading is erratic while turning the steering wheel Replace the X85 Steering Wheel Air Bag Coil. If 2 ohms or greater Vehicle OFF, disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for less than 2 ohms in the X85 Steering Wheel Air Bag Coil and each control circuit end to end. If 2 ohms or greater, replace the coil or repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 2 ohms
9. Vehicle OFF, connect the harness connector at the F107 Steering Wheel Air Bag, press in the CPA (if equipped) until an audible and/or tactile click is heard.
10. Vehicle in Service Mode, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
11. Verify DTC B0012 or B0013 is not set. If DTC B0012 or B0013 is set Replace the F107 Steering Wheel Air Bag. If DTC B0012 or B0013 is not set
12. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

1. «Steering Wheel Airbag Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Steering Wheel Airbag Coil Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
3. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy an air bag. There are 2 shorting bars used within the connector that will short together the control circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the air bag or retractor pretensioner during servicing.

Ignition voltage is between 9-16 V.

B0014 01, B0021 01

The air bag control circuit is shorted to voltage for 2 seconds.

B0014 02, B0021 02

The air bag control circuit is shorted to ground for 2 seconds.

B0014 04, B0021 04

The air bag control circuit is open for 2 seconds.

B0014 0D, B0021 0D

The air bag deployment loop resistance is greater than 4.2 ohms for 2 seconds.

B0014 0E, B0021 0E

The air bag deployment loop resistance is less than 1.4 ohms for 2 seconds.

1. The inflatable restraint sensing and diagnostic module requests the instrument cluster to illuminate the AIR BAG indicator.
2. The inflatable restraint sensing and diagnostic module will store a DTC, however if an event occurs the system will still attempt deployments.

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

Note. The following diagnostic aids apply for both current and history DTCs.

An incorrectly installed CPA or incorrectly seated connector can cause a shorting bar to short both control circuits together. Check the connectors and CPAs if a DTC with symptom byte 02 or 0E is set, to ensure the shorting bars are not causing the circuits to be shorted together. Shorting bars are used in the locations listed below

1. Left and rear seat side air bags
2. Left and right roof rail air bags
3. Inline connectors - on the side of the harness connector
4. Harness side of the inflatable restraint sensing and diagnostic module connector

Terminal fretting or incorrectly seated connector can cause an open/high resistance condition. Check the circuit terminals for fretting or incorrectly seated connector if a DTC with symptom byte 04 or 0D is set. DTCs of deployment loops which are in the seat can occur because of stress or damage to the harness due to seat movement. Move the seat to the full extend of travel while using the scan tool to observe deployment type loop parameters.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-38125-580 Terminal Release Tool Kit

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

1. Verify the scan tool Deployment Loop Resistance parameters stay consistently between 2.1 and 4.0 ohms without any spikes or dropouts while moving the harness near each connector. F106 Seat Side Air Bag Any inline harness K36 Inflatable Restraint Sensing and Diagnostic Module If less than 2.1 or greater than 4.0 ohms Refer to Circuit/System Testing. If there are spikes or dropouts, perform the following Inspect each connector terminal and harness for damage or corrosion and repair as necessary Apply dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087) to each connector terminal Insure each connector and CPA is correctly seated. If within 2.1 and 4.0 ohms without any spikes or dropouts
2. All OK

1. Vehicle OFF, disconnect the scan tool and then disconnect the appropriate F106 Seat Side Air Bag harness connector and then wait for 120 seconds.
2. Test for greater than 25 ohms between the control circuit terminals 1 and 2. If 25 ohms or less Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. NOTE: Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar, or terminal when depressing the shorting bar. Test for infinite resistance between the two control circuits. If less than infinite resistance, repair the short between the two circuits. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 25 ohms
3. Vehicle in Service Mode.
4. Test for less than 11 V between the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 If 11 V or greater Vehicle OFF, disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, Vehicle in Service Mode. Test for less than 1 V between each control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 11 V
5. Vehicle OFF.
6. Test for greater than 25 ohms between the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 If 25 ohms or less Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for infinite resistance between each control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 25 ohms
7. Vehicle OFF, install a 3 A fused jumper wire between the control circuit terminals 1 and 2.
8. Vehicle in Service Mode, verify the scan tool Deployment Loop Resistance parameter is less than 2 ohms. If 2 ohms or greater Vehicle OFF, disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for less than 2 ohms in each control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 2 ohms
9. Vehicle OFF, connect the harness connector at the appropriate F106 Seat Side Air Bag, press in the CPA (if equipped) until an audible and/or tactile click is heard.
10. Vehicle in Service Mode, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
11. Verify DTC B0014, B0021, B0031, or B0038 is not set. If DTC B0014, B0021, B0031, or B0038 is set Replace the appropriate F106 Seat Side Air Bag. If DTC B0014, B0021, B0031, or B0038 is not set
12. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Seat Outboard Seat Back Airbag Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Inflatable Restraint Sensing and Diagnostic Module control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

During a side or frontal crash of sufficient force the Inflatable Restraint Sensing and Diagnostic Module will allow current to flow through the deployment loop in order to deploy an air bag or pretensioner. There are 2 shorting bars which will short together control circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the air bag or pretensioner during servicing.

Ignition voltage is between 9-16 V.

B0015 01, B001A 01, B001B 01, B0022 01

The pretensioner control circuit is shorted to voltage for 2 seconds.

B0015 02, B001A 02, B001B 02, B0022 02

The pretensioner control circuit is shorted to ground for 2 seconds.

B0015 04, B001A 04, B001B 04, B0022 04

The pretensioner control circuit is open for 2 seconds.

B0015 0D, B001A 0D, B001B 0D, B0022 0D

The pretensioner deployment loop resistance is greater than 4.2 ohms for 2 seconds.

B0015 0E, B001A 0E, B001B 0E, B0022 0E

The pretensioner deployment loop resistance is less than 1.4 ohms for 2 seconds.

1. The Inflatable Restraint Sensing and Diagnostic Module requests the Instrument Cluster to illuminate the AIR BAG indicator.
2. The Inflatable Restraint Sensing and Diagnostic Module will store a DTC, however if an event occurs the system will still attempt deployments.

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

Note. The following diagnostic aids apply for both current and history DTCs.

An incorrectly installed CPA or incorrectly seated connector can cause a shorting bar to short both control circuits together. Check the connectors and CPAs if a DTC with symptom byte 02 or 0E is set, to ensure the shorting bars are not causing the circuits to be shorted together. Shorting bars are used in the locations listed below

1. Driver and passenger anchor or retractor pretensioners
2. Inline connectors - on the side of the harness connector
3. Harness side of the inflatable restraint sensing and diagnostic module connector

Terminal fretting or incorrectly seated connectors can cause an open/high resistance condition. Check the circuit terminals for fretting or incorrectly seated connector if a DTC with symptom byte 04 or 0D is set. DTCs of deployment loops which are in the seat can occur because of stress or damage to the harness due to seat movement. Move the seat to the full extend of travel while using the scan tool to observe deployment type loop parameters.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-38125-580 Terminal Release Tool Kit

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

1. Verify the scan tool Deployment Loop Resistance parameters stay consistently between 2.1 and 4.0 ohms without any spikes or dropouts while moving the harness near each connector listed below: F112 Seat Belt Retractor Pretensioner F113 Seat Belt Anchor Pretensioner Any inline harness K36 Inflatable Restraint Sensing and Diagnostic Module If less than 2.1 or greater than 4.0 ohms Refer to Circuit/System Testing. If there are spikes or dropouts, perform the following Inspect each connector terminal and harness for damage or corrosion and repair as necessary. Apply dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087) to each connector terminal. Ensure each connector and CPA is correctly seated. If within 2.1 and 4.0 ohms without any spikes or dropouts
2. All OK.

1. Vehicle OFF, disconnect the scan tool. It may take up to 2 minutes for all vehicle systems to power down. Disconnect the appropriate harness connector listed below: F112 Seat Belt Retractor Pretensioner F113 Seat Belt Anchor Pretensioner
2. Test for greater than 25 ohms between the appropriate control circuit terminals listed below: F112 Seat Belt Retractor Pretensioner terminals 1 and 2 F113 Seat Belt Anchor Pretensioner terminals 1 and 2 If 25 ohms or less Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. NOTE: Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar, or terminal when depressing the shorting bar. Test for infinite resistance between the 2 control circuits. If less than infinite resistance, repair the short between the two circuits. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 25 ohms
3. Vehicle in Service Mode.
4. Test for less than 11 V between the control circuit terminals listed below and ground: F112 Seat Belt Retractor Pretensioner terminal 1 F112 Seat Belt Retractor Pretensioner terminal 2 F113 Seat Belt Anchor Pretensioner terminal 1 F113 Seat Belt Anchor Pretensioner terminal 2 If 11 V or greater Vehicle OFF, disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, vehicle in Service Mode. Test for less than 1 V between each control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 11 V
5. Vehicle OFF. It may take up to 2 minutes for all vehicle systems to power down.
6. Test for greater than 25 ohms between the control circuit terminals listed below and ground: F112 Seat Belt Retractor Pretensioner terminal 1 F112 Seat Belt Retractor Pretensioner terminal 2 F113 Seat Belt Anchor Pretensioner terminal 1 F113 Seat Belt Anchor Pretensioner terminal 2 If 25 ohms or less Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for infinite resistance between each control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 25 ohms
7. Install a 3 A fused jumper wire between the appropriate control circuit terminals listed below: F112 Seat Belt Retractor Pretensioner terminals 1 and 2 F113 Seat Belt Anchor Pretensioner terminals 1 and 2
8. Vehicle in Service Mode.
9. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohms. If 2 ohms or greater Vehicle OFF. Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for less than 2 ohms in each control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 2 ohms
10. Vehicle OFF, connect the harness connector at the F112 Seat Belt Retractor Pretensioner or F113 Seat Belt Anchor Pretensioner, press in the CPA (if equipped) until an audible and/or tactile click is heard.
11. Vehicle in Service Mode, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
12. Verify DTC B0015, B001A, B001B, or B0022 is not set. If B0015, B001A, B001B, or B0022 is set Replace the appropriate F112 Seat Belt Retractor Pretensioner or F113 Seat Belt Anchor Pretensioner. If DTC B0015, B001A, B001B, or B0022 is not set
13. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front Seat Belt Anchor Plate Tensioner Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Front Seat Belt Retractor Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
3. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy an air bag or pretensioner. There are 2 shorting bars which will short together control circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the air bag or pretensioner during servicing.

Ignition voltage is between 9-16 V.

B0016 01, B0023 01

The air bag control circuit is shorted to voltage for 2 seconds.

B0016 02, B0023 02

The air bag control circuit is shorted to ground for 2 seconds.

B0016 04, B0023 04

The air bag control circuit is open for 2 seconds.

B0016 0D, B0023 0D

The air bag deployment loop resistance is greater than 4.2 ohms for 2 seconds.

B0016 0E, B0023 0E

The air bag deployment loop resistance is less than 1.4 ohms for 2 seconds.

1. The inflatable restraint sensing and diagnostic module requests the instrument cluster to illuminate the AIR BAG indicator.
2. The inflatable restraint sensing and diagnostic module will store a DTC, however if an event occurs the system will still attempt deployments.

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

Note. The following diagnostic aids apply for both current and history DTCs.

An incorrectly installed CPA or incorrectly seated connector can cause a shorting bar to short both control circuits together. Check the connectors and CPAs if a DTC with symptom byte 02 or 0E is set, to ensure the shorting bars are not causing the circuits to be shorted together. Shorting bars are used in the locations listed below

1. Passenger instrument panel air bag
2. Driver and passenger seat side air bags
3. Knee air bags
4. Left and right roof rail air bags
5. Driver and passenger retractor pretensioners
6. Inline connectors - on the side of the harness connector
7. Harness side of the inflatable restraint sensing and diagnostic module connector

Terminal fretting or incorrectly seated connectors can cause an open/high resistance condition. Check the circuit terminals for fretting or incorrectly seated connector if a DTC with symptom byte 04 or 0D is set. DTCs of deployment loops which are in the seat DTC can occur because of stress or damage to the harness due to seat movement. Move the seat to the full extend of travel while using the scan tool to observe deployment type loop parameters.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-38125-580 Terminal Release Tool Kit

Note. Refer to SIR Service Precautions . Inspect all terminals for damage or corrosion when disconnecting connectors. Damage or corrosion in the following requires repair or replacement of the affected component/connector. Seat belt retractor pretensioner Passenger instrument panel air bag Knee air bag Seat side air bag Roof rail air bag Inflatable restraint sensing and diagnostic module Seat belt retractor pretensioner wiring harness connector Passenger instrument panel air bag wiring harness connector Seat side air bag wiring harness connector Roof rail air bag wiring harness connector Inflatable restraint sensing and diagnostic module wiring harness connector The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly. If the condition is intermittent or cannot be duplicated, disconnect the connectors and add dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087). This procedure will correct the high resistance condition due to terminal fretting corrosion.

1. Verify the scan tool Deployment Loop Resistance parameters stay consistently between 2.1 and 4.0 ohms without any spikes or dropouts while moving the harness near each connector listed below: F105L Roof rail air bag - left F105R Roof rail air bag - right Any inline harness K36 inflatable restraint sensing and diagnostic module If less than 2.1 or greater than 4.0 ohms Refer to Circuit/System Testing. If there are spikes or dropouts, perform the following Inspect each connector terminal and harness for damage or corrosion and repair as necessary Apply dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087) to each connector terminal Insure each connector and CPA is correctly seated. If within 2.1 and 4.0 ohms without any spikes or dropouts
2. All OK

1. Vehicle OFF.
2. Disconnect the scan tool.
3. Disconnect the appropriate harness connector listed below: F105L Roof Rail Air Bag - Left F105R Roof Rail Air Bag - Right
4. Wait for 120 seconds.
5. Test for greater than 25 ohms between the control circuit terminals 1 and 2. If 25 ohms or less Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module. NOTE: Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar, or terminal when depressing the shorting bar. Test for infinite resistance between the two control circuits. If less than infinite resistance, repair the short between the two circuits. If infinite resistance, replace the K36 inflatable restraint sensing and diagnostic module. If greater than 25 ohms
6. Vehicle in Service Mode.
7. Test for less than 11 V between the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 If 11 V or greater Vehicle OFF. Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module. Vehicle in Service Mode. Test for less than 1 V between each control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 inflatable restraint sensing and diagnostic module. If less than 11 V
8. Vehicle OFF.
9. Test for greater than 25 ohms between the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 If 25 ohms or less Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module. Test for infinite resistance between each control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K36 inflatable restraint sensing and diagnostic module. If greater than 25 ohms
10. Vehicle OFF.
11. Install a 3 A fused jumper wire between the appropriate control circuit terminals 1 and 2.
12. Vehicle in Service Mode.
13. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohms. If 2 ohms or greater Vehicle OFF. Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module. Test for less than 2 ohms in each control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 inflatable restraint sensing and diagnostic module. If less than 2 ohms
14. Vehicle OFF, connect the harness connector at the F105L Roof Rail Air Bag - left or F015R Roof Rail Air Bag - right, press in the CPA (if equipped) until an audible and/or tactile click is heard.
15. Vehicle in Service Mode, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
16. Verify DTC B0016, B0018, B0023, or B0025 is not set. If DTC B0016, B0018, B0023, or B0025 is set Replace the appropriate F105L Roof Rail Air Bag - left or F015R Roof Rail Air Bag - right. If DTC B0016, B0018, B0023, or B0025 is not set
17. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Front and Rear Row Seat Roof Rail Airbag Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for inflatable restraint sensing and diagnostic module control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

During a side or frontal crash of sufficient force the inflatable restraint sensing and diagnostic module (SDM) will allow current to flow through the deployment loop in order to deploy an air bag. There are 2 shorting bars used within the connector that will short together the control circuits, when the connector is disconnected. This will help to prevent unwanted deployment of the air bag or retractor pretensioner during servicing.

Ignition voltage is between 9-16 V.

B0017 01, B0024 01

The air bag control circuit is shorted to voltage for 2 seconds.

B0017 02, B0024 02

The air bag control circuit is shorted to ground for 2 seconds.

B0017 04, B0024 04

The air bag control circuit is open for 2 seconds.

B0017 0D, B0024 0D

The air bag deployment loop resistance is greater than 4.2 ohms for 2 seconds.

B0017 0E, B0024 0E

The air bag deployment loop resistance is less than 1.4 ohms for 2 seconds.

1. The Inflatable Restraint Sensing and Diagnostic Module requests the instrument cluster to illuminate the AIR BAG indicator.
2. The Inflatable Restraint Sensing and Diagnostic Module will store a DTC, however if an event occurs the system will still attempt deployments.

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

Note. The following diagnostic aids apply for both current and history DTCs.

An incorrectly installed CPA or incorrectly seated connector can cause a shorting bar to short both control circuits together. Check the connectors and CPAs if a DTC with symptom byte 02 or 0E is set, to ensure the shorting bars are not causing the circuits to be shorted together. Shorting bars are used in the locations listed below

1. Driver and passenger Knee Air Bags
2. Inline connectors - on the side of the harness connector
3. Harness side of the inflatable restraint sensing and diagnostic module connector

Terminal fretting or incorrectly seated connector can cause an open/high resistance condition. Check the circuit terminals for fretting or incorrectly seated connector if a DTC with symptom byte 04 or 0D is set. DTCs of deployment loops which are in the seat can occur because of stress or damage to the harness due to seat movement. Move the seat to the full extend of travel while using the scan tool to observe deployment type loop parameters.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-38125-580 Terminal Release Tool Kit

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

1. Verify the scan tool Deployment Loop Resistance parameters stay consistently between 2.1 and 4.0 ohms without any spikes or dropouts while moving the harness near each connector listed below: F114D Knee Air Bag - Driver F114P Knee Air Bag - Passenger Any inline harness K36 Inflatable Restraint Sensing and Diagnostic Module If less than 2.1 or greater than 4.0 ohms Refer to Circuit/System Testing. If there are spikes or dropouts, perform the following Inspect each connector terminal and harness for damage or corrosion and repair as necessary Apply dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087) to each connector terminal Insure each connector and CPA is correctly seated. If within 2.1 and 4.0 ohms without any spikes or dropouts
2. All OK

1. Vehicle OFF, disconnect the scan tool, disconnect the appropriate F114 Knee Air Bag harness connector, and then wait for 120 seconds.
2. Test for greater than 25 ohms between the appropriate control circuit terminals 1 and 2. If 25 ohms or less Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. NOTE: Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar, or terminal when depressing the shorting bar. Test for infinite resistance between the two control circuits. If less than infinite resistance, repair the short between the two circuits. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 25 ohms
3. Vehicle in Service Mode.
4. Test for less than 11 V between the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 If 11 V or greater Vehicle OFF, disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module, Vehicle in Service Mode. Test for less than 1 V between each control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 11 V
5. Vehicle OFF.
6. Test for greater than 25 ohms between the control circuit terminals listed below and ground: Control circuit terminal 1 Control circuit terminal 2 If 25 ohms or less Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for infinite resistance between each control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 25 ohms
7. Vehicle OFF, install a 3 A fused jumper wire between the control circuit terminals 1 and 2.
8. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohms. If 2 ohms or greater Vehicle OFF, disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for less than 2 ohms in each control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 2 ohms
9. Vehicle OFF, connect the harness connector at the F114 knee air bag, press in the CPA (if equipped) until an audible and/or tactile click is heard.
10. Vehicle in Service Mode, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
11. Verify DTC B0017 or B0024 is not set. If DTC B0017 or B0024 is set Replace the appropriate F114 Knee Air Bag. If DTC B0017 or B0024 is not set
12. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Instrument Panel Lower Airbag Replacement - Driver Side»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Instrument Panel Lower Airbag Replacement - Passenger Side»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
3. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for inflatable restraint sensing and diagnostic module control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

During a side or frontal crash of sufficient force the Inflatable Restraint Sensing and Diagnostic Module (SDM) will allow current to flow through the deployment loop in order to deploy an air bag or pretensioner. There are two shorting bars which will short the control circuits together when the connector is disconnected. This will help to prevent unwanted deployment of the air bag or pretensioner during servicing.

Ignition voltage is between 9-16 V.

B0019 01, B0020 01

The air bag control circuit is shorted to voltage for 2 seconds.

B0019 02, B0020 02

The air bag control circuit is shorted to ground for 2 seconds.

B0019 04, B0020 04

The air bag control circuit is open for 2 seconds.

B0019 0D, B0020 0D

The air bag deployment loop resistance is greater than 4.2 ohms for 2 seconds.

B0019 0E, B0020 0E

The air bag deployment loop resistance is less than 1.4 ohms for 2 seconds.

1. The Inflatable Restraint Sensing and Diagnostic Module requests the instrument cluster to illuminate the AIR BAG indicator.
2. The Inflatable Restraint Sensing and Diagnostic Module will store a DTC, however if an event occurs the system will still attempt deployments.

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

Note. The following diagnostic aids apply for both current and history DTCs.

An incorrectly installed connector position assurance (CPA) or incorrectly seated connector can cause a shorting bar to short both control circuits together. Check the connectors and CPAs if a DTC with symptom byte 02 or 0E is set, to ensure the shorting bars are not causing the circuits to be shorted together. Shorting bars are used in the locations listed below

1. Passenger Instrument Panel Air Bag
2. Inline harness connectors
3. Harness side of the Inflatable Restraint Sensing and Diagnostic Module connector

Terminal fretting or incorrectly seated connector can cause an open/high resistance condition. Check the circuit terminals for fretting or incorrectly seated connector if a DTC with symptom byte 04 or 0D is set.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

Special Tools

EL-38125-580 Terminal Release Tool Kit

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

1. Verify the scan tool Deployment Loop Resistance parameters stay consistently between 2.1-4.0 ohms without any spikes or dropouts while moving the harness near each connector listed below: F101 Passenger Instrument Panel Air Bag Any inline harness connector K36 Inflatable Restraint Sensing and Diagnostic Module If less than 2.1 ohms or greater than 4.0 ohms Refer to Circuit/System Testing. If there are spikes or dropouts, perform the following Inspect each connector terminal and harness for damage or corrosion and repair as necessary Apply dielectric grease / lubricant (Nyogel 760G or equivalent, meeting GM specification 9986087) to each connector terminal Insure each connector and CPA is correctly seated. If between 2.1-4.0 ohms without any spikes or dropouts
2. All OK.

1. Vehicle OFF, scan tool disconnected, disconnect the appropriate X1 (DTC B0019) or X2 (DTC B0020) harness connector at the F101 Passenger instrument panel air bag. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for greater than 25 ohms between the appropriate control circuit terminals listed below: F101 Passenger Instrument Panel Air Bag stage 1 control circuit terminal 1 X1 and 2 X1 F101 Passenger Instrument Panel Air Bag stage 2 control circuit terminal 1 X2 and 2 X2 If 25 ohms or less Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. NOTE: Some connectors may be equipped with shorting bars as a safety component to prevent accidental inflator deployment. When testing on a connector with shorting bars, the shorting bars must be disabled to ensure accurate test results. Insert an appropriate pick from EL-38125-580 and depress the shorting bars above the appropriate terminals. This will lift the shorting bar from the terminal and allow accurate test results. Take care not to damage the connector, shorting bar, or terminal when depressing the shorting bar. Test for infinite resistance between the two control circuits. If less than infinite resistance, repair the short between the two circuits. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 25 ohms
3. Test for less than 11 V between each control circuit terminals listed below and ground: F101 Passenger Instrument Panel Air Bag control circuit terminal 1 X1 F101 Passenger Instrument Panel Air Bag control circuit terminal 2 X1 F101 Passenger Instrument Panel Air Bag control circuit terminal 1 X2 F101 Passenger Instrument Panel Air Bag control circuit terminal 2 X2 If 11 V or greater Repair the short to voltage on the circuit. If less than 11 V
4. Vehicle OFF.
5. Test for greater than 25 ohms between each control circuit terminals listed below and ground: F101 Passenger Instrument Panel Air Bag control circuit terminal 1 X1 F101 Passenger Instrument Panel Air Bag control circuit terminal 2 X1 F101 Passenger Instrument Panel Air Bag control circuit terminal 1 X2 F101 Passenger Instrument Panel Air Bag control circuit terminal 2 X2 If 25 ohms or less Repair the short to ground on the circuit. If greater than 25 ohms
6. Install a 3 A fused jumper wire between the control circuit terminals listed below: F101 Passenger Instrument Panel Air Bag stage 1 control circuit terminal 1 X1 and 2 X1 F101 Passenger Instrument Panel Air Bag stage 2 control circuit terminal 1 X2 and 2 X2
7. Vehicle in Service Mode.
8. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohms. If 2 ohms or greater Vehicle OFF, disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for less than 2 ohms in each control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 2 ohms
9. Vehicle OFF, connect the harness connector at the F101 Passenger Instrument Panel Air Bag, press in the CPA (if equipped) until an audible and/or tactile click is heard.
10. Vehicle in Service Mode, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
11. Verify DTC B0019 or B0020 is not set. If DTC B0019 or B0020 is set Replace the F101 Passenger Instrument Panel Air Bag. If DTC B0019 or B0020 is not set
12. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Instrument Panel Airbag Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Inflatable Restraint Sensing and Diagnostic Module control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using the diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) senses vehicle impacts and provides deployment signals to the air bags and anchor and/or retractor pretensioners when warranted. The inflatable restraint sensing and diagnostic module sets DTC B0052 after each command for deployment. DTC B0052 will latch and not clear after 3 commanded deployments by the inflatable restraint sensing and diagnostic module. Therefore the inflatable restraint sensing and diagnostic module has to be replaced.

Ignition voltage is between 9-16 V.

1. The inflatable restraint sensing and diagnostic module detects a frontal impact of sufficient force to warrant deployment of the frontal air bags.
2. The inflatable restraint sensing and diagnostic module detects a side impact or rollover (if equipped) of sufficient force to warrant deployment of a seat air bag and/or roof rail air bag.

The inflatable restraint sensing and diagnostic module requests the instrument cluster to illuminate the AIR BAG indicator.

1. DTC B0052 00 is a DTC that may be cleared with a scan tool without replacing the inflatable restraint sensing and diagnostic module. This DTC will not clear if deployment has been commanded more then two times, and the inflatable restraint sensing and diagnostic module would have to be replaced.
2. DTC B0052 56 is a latched DTC. The DTC cannot be cleared with the scan tool. Replacement of the inflatable restraint sensing and diagnostic module is required.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Verify that DTC B0052 00 is not set. If DTC B0052 00 is set Clear the DTC. If the DTC will not clear, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If DTC B0052 00 is not set
2. Verify that DTC B0052 56 is not set. If DTC B0052 56 is set Replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If DTC B0052 56 is not set
3. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for inflatable restraint sensing and diagnostic module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The passenger presence module monitors the sensor status continually. Whenever the sensor mat has an internal malfunction, the passenger presence module will set DTC B0074.

Ignition voltage is between 9-16 V.

B0074 00

The passenger presence module has detected a disconnection from the sensor mat.

B0074 0D

The passenger presence module has detected a resistance above threshold.

B0074 0E

The passenger presence module has detected a resistance below threshold.

B0074 0F

The passenger presence module has detected a wet seat fault.

The inflatable restraint sensing and diagnostic module requests the instrument panel cluster to illuminate the AIR BAG indicator.

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

Diagnostic Aids

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

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. This system is serviced as a kit (seat foam, module and/or sensing mat). Perform a Passenger Presence System Preload whenever a component is replaced, refer to Passenger Presence System Programming and Setup . Inspect component connectors for damage or corrosion. Repair or replace the affected component/connector: Passenger Presence Module Passenger Presence Module harness connector Seat wiring harness to vehicle harness connector The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an audible and/or tactile click.

1. Verify with the scan tool, the DTC remains Current while moving the passenger seat forward and backward through its full range of motion. The status should stay consistent. The DTC changes to History If the status changes this could be indication of a seat to vehicle harness connection issue, refer to Circuit/System Testing. The DTC remains Current
2. Verify with the scan tool, if the fault changes status while moving the harness near each connector listed below. The status should stay consistent. K85 Passenger Presence Module B60 Passenger Presence Sensor Any seat harness inline The status changes If the reading is erratic while moving the harness, perform the following: Inspect each connector terminal for damage or corrosion and repair as necessary. Ensure each connector and CPA is correctly seated. The status does not change
3. All OK.

Note. This system is serviced as a kit (seat foam, module and/or sensing mat). Perform a Passenger Presence System Preload whenever a component is replaced, refer to Passenger Presence System Programming and Setup . Inspect component connectors for damage or corrosion. Repair or replace the affected component/connector

1. Confirm that all passenger presence system connectors are fully seated.
2. Verify that DTC B0074 0F is not set. DTC B0074 0F is set. Verify there are no electronic devices on the passenger seat. If not, then verify the seat is dry by removing the trim from the seat bottom frame. If the seat is wet, allow 24-48 hours dry time with trim completely off. If the DTC is history, do not replace B60 Passenger Presence Sensor. Clear passenger presence module DTCs. Verify there are no electronic devices on the passenger seat. Empty the passenger seat If the seat is empty Verify the seat is dry by removing the trim from the seat bottom frame. If the seat is wet, allow 24-48 hours dry time with trim completely off. If the seat is dry If the DTC is history, do not replace B60 Passenger Presence Sensor, and clear passenger presence module DTCs. DTC B0074 0F does not set.
3. Verify DTC B0074 00, B0074 0D or B0074 0E is not set. DTC B0074 00, B0074 0D or B0074 0E is set. Replace the K85 Passenger Presence Module. DTC B0074 00, B0074 0D or B0074 0E do not set.
4. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

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

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using the diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

When the ignition is turned ON, the Passenger Presence Module and the Inflatable Restraint Sensing and Diagnostic Module performs tests to diagnose critical malfunctions. When the Inflatable Restraint Sensing and Diagnostic Module has completed the power-up mode, the Inflatable Restraint Sensing and Diagnostic Module will establish communication with the Passenger Presence Module. The Inflatable Restraint Sensing and Diagnostic Module will also request the instrument panel cluster (IPC) to illuminate both of the PASSENGER AIR BAG ON/OFF indicators ON for 5 seconds. If the Inflatable Restraint Sensing and Diagnostic Module determines the correct Passenger Presence Module is installed and functioning normally, the Inflatable Restraint Sensing and Diagnostic Module will illuminate the passenger air bags ON or OFF indicator based on messages from the Passenger Presence Module. The Inflatable Restraint Sensing and Diagnostic Module sends a message to the IPC to illuminate the appropriate PASSENGER AIR BAG ON/OFF indicator.

Ignition voltage is between 9-16 V.

All of the following conditions must exist for 5 seconds

B0081 00

The Inflatable Restraint Sensing and Diagnostic Module sets this DTC if there is a fault present in the Passenger Presence Module.

B0081 3A

The Inflatable Restraint Sensing and Diagnostic Module sets this DTC when the Inflatable Restraint Sensing and Diagnostic Module has received a message from the Passenger Presence Module which indicates a mismatch between the Inflatable Restraint Sensing and Diagnostic Module and Passenger Presence Module. There is either an incorrect Inflatable Restraint Sensing and Diagnostic Module or Passenger Presence Module installed on this vehicle.

B0081 71

The Inflatable Restraint Sensing and Diagnostic Module sets this DTC when the Inflatable Restraint Sensing and Diagnostic Module has received invalid serial data from the Passenger Presence Module.

B0081 11

The Passenger Presence Module sets this DTC when there is a high input to the Passenger Presence Module.

B0081 4B

The Passenger Presence Module sets this DTC when the Passenger Presence Module has not learned the calibrations.

B0081 5A

The Passenger Presence Module sets this code when the Passenger Presence Module has lost communications with the Inflatable Restraint Sensing and Diagnostic Module.

1. The Inflatable Restraint Sensing and Diagnostic Module disables the passenger instrument panel air bag.
2. The Passenger Presence Module will illuminate the Passenger Airbag On/Off indicator status as OFF.
3. When the Passenger Presence Module sets this DTC, the Passenger Presence Module communicates with the Inflatable Restraint Sensing and Diagnostic Module to turn the AIRBAG indicator on.
4. When the Inflatable Restraint Sensing and Diagnostic Module sets this DTC, the Inflatable Restraint Sensing and Diagnostic Module will turn the AIRBAG indicator on.
5. The Inflatable Restraint Sensing and Diagnostic Module requests the instrument panel cluster (IPC) to illuminate the AIRBAG indicator.

1. The condition for setting the DTC no longer exists and there is no activity on the low speed serial data circuits.
2. A history DTC will clear once 100 malfunction-free ignition cycles have occurred.

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

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Vehicle in Service Mode. Verify that DTC B0081 is the only DTC set in the K36 Inflatable Restraint Sensing and Diagnostic Module or K85 Passenger Presence Module. If any other DTC is set Diagnose the other DTCs first, refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) . If B0081 is the only DTC set
2. Verify DTC B0081 11 or DTC B0081 4B is not set in the K85 Passenger Presence Module. If DTC B0081 11 or DTC B0081 4B is set in the K85 Passenger Presence Module The correct calibration was not learned by the K85 Passenger Presence Module. Perform the Passenger Presence System Preload Test procedure. Refer to «Passenger Presence System Programming and Setup»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems) . If neither of these DTCs are set in the K85 Passenger Presence Module
3. Verify DTC B0081 5A is not set in the K85 Passenger Presence Module. If DTC B0081 5A is set in the K85 Passenger Presence Module Check the connections at the K36 Inflatable Restraint Sensing and Diagnostic Module and K85 Passenger Presence Module. Clear the DTC's and check if DTC B0081 5A sets again in the K85 Passenger Presence Module. If DTC B0081 5A sets again replace the B60 Passenger Presence Sensor. If DTC B0081 5A does not set All OK. If none of these DTCs set in the K85 Passenger Presence Module
4. Verify DTC B0081 3A is not set in the K36 Inflatable Restraint Sensing and Diagnostic Module. If DTC B0081 3A is set in the K36 Inflatable Restraint Sensing and Diagnostic Module Either an incorrect replacement K85 Passenger Presence Module or K36 Inflatable Restraint Sensing and Diagnostic Module was placed in this vehicle. Check and make sure the part numbers are correct for each module. If either part number is incorrect replace it with the correct part number. If both part numbers are correct Clear the DTC's and check if DTC B0081 3A sets again in the K36 Inflatable Restraint Sensing and Diagnostic Module. If DTC B0081 3A sets again replace the B60 passenger presence sensor. If the DTC sets again replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If DTC B0081 3A does not set All OK. If DTC B0081 3A is not set in the K36 Inflatable Restraint Sensing and Diagnostic Module
5. Verify DTC B0081 71 is not set in the K36 Inflatable Restraint Sensing and Diagnostic Module. If DTC B0081 71 is set in the K36 Inflatable Restraint Sensing and Diagnostic Module Check the connections at the K36 Inflatable Restraint Sensing and Diagnostic Module and K85 Passenger Presence Module. Clear the DTC's and check if DTC B0081 71 sets again in the K36 Inflatable Restraint Sensing and Diagnostic Module. If DTC B0081 71 sets again replace the B60 passenger presence sensor. If DTC B0081 71 does not set All OK. If DTC B0081 71 does not set in the K36 Inflatable Restraint Sensing and Diagnostic Module
6. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «SIR/SRS Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__sirsrs-wiring-repairs)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for passenger presence system or Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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

Ignition voltage is between 9-16 V.

Any of the following conditions exist for 10 seconds

B0083 02, B0084 02

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

B0083 05, B0084 05

1. The sensor circuit is open.
2. The Inflatable Restraint Sensing and Diagnostic Module has not received a message from the sensor for greater than 375 milliseconds.

B0083 39, B0084 39

1. The Inflatable Restraint Sensing and Diagnostic Module has received a Not OK message from the sensor.
2. The Inflatable Restraint Sensing and Diagnostic Module has not received a message.

B0083 3A, B0084 3A

1. The Inflatable Restraint Sensing and Diagnostic Module has received identification message from the sensor, which does not match the identification stored in the Inflatable Restraint Sensing and Diagnostic Module memory.
2. The Inflatable Restraint Sensing and Diagnostic Module has reset the impact sensor twice without detecting the correct identification message.

B0083 71, B0084 71

The Inflatable Restraint Sensing and Diagnostic Module has received invalid serial data from the sensor.

The Inflatable Restraint Sensing and Diagnostic Module requests the instrument panel cluster to illuminate the AIR BAG indicator.

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

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

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

1. Vehicle in Service Mode. With a scan tool, verify that DTC B0083 or B0084 symptom byte 3A, 39 or 71 is not set as current. If DTC B0083 or B0084 symptom byte 3A, 39 or 71 is set as current Replace the appropriate B59 Front Impact Sensor. If DTC B0083 or B0084 symptom byte 3A, 39 or 71 is not set as current
2. Verify that DTC B0083 or B0084 symptom byte 02 or 05 is not set as current. If DTC B0083 or B0084 symptom byte 02 or 05 is set as current Refer to Circuit/System Testing. If DTC B0083 or B0084 symptom byte 02 or 05 is not set as current
3. All OK.

1. Vehicle OFF. Disconnect the harness connector at the appropriate B59 Front Impact Sensor. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground. If 10 ohms or greater Vehicle OFF, disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 10 ohms
3. Vehicle in Service Mode.
4. Test for less than 11 V between the signal circuit terminal 1 and ground. If 11 V or greater Vehicle OFF. Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Vehicle in Service Mode. Test for less than 1 V between the signal circuit terminal 1 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 1 V
5. Vehicle OFF. Test for greater than 50k ohms between the signal circuit terminal 1 and ground. If 50k ohms or less Disconnect the X2 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 50k ohms
6. Disconnect the X2 harness connector at the Inflatable Restraint Sensing and Diagnostic Module.
7. Test for less than 2 ohms between the signal circuit end to end from the B59 Front Impact Sensor terminal 1 and the K36 Inflatable Restraint Sensing and Diagnostic Module terminal listed below: Right Front Impact Sensor terminal 26 X2 Left Front Impact Sensor terminal 23 X2 If 2 ohms or greater
8. Repair the short to voltage or an open/high resistance in the circuit. If less than 2 ohms
9. Vehicle OFF, reconnect all harness connectors, press in the CPA (if equipped) until an audible and/or tactile click is heard.
10. Vehicle in Service Mode, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
11. Verify DTC B0083 or B0084 is not set. If DTC B0083 or B0084 is set Replace the B59 Front Impact Sensor. If DTC B0083 or B0084 is not set
12. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Airbag Front End Discriminating Sensor Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Inflatable Restraint Sensing and Diagnostic Module control module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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

Ignition voltage is between 9-16 V.

Any of the following conditions exist for 10 seconds

B0085 02, B0088 02

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

B0085 05, B0088 05

1. The sensor circuit is open.
2. The inflatable restraint sensing and diagnostic module has not received a message from the sensor for greater than 375 milliseconds.

B0085 39, B0088 39

1. The inflatable restraint sensing and diagnostic module has received a Not OK message from the sensor.
2. The inflatable restraint sensing and diagnostic module has not received a message.

B0085 3A, B0088 3A

1. The inflatable restraint sensing and diagnostic module has received identification message from the sensor, which does not match the identification stored in the inflatable restraint sensing and diagnostic module memory.
2. The inflatable restraint sensing and diagnostic module has reset the impact sensor twice without detecting the correct identification message.

B0085 71, B0088 71

The inflatable restraint sensing and diagnostic module has received invalid serial data from the sensor.

The inflatable restraint sensing and diagnostic module requests the instrument panel cluster to illuminate the AIR BAG indicator.

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

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

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

1. Verify that DTC B0085 or B0088 symptom byte 3A, 39 or 71 is not set as current. If DTC B0085 or B0088 symptom byte 3A, 39 or 71 is set as current Replace the appropriate B63 side impact sensor If DTC B0085 or B0088 symptom byte 3A, 39 or 71 is not set as current
2. Verify that DTC B0085 or B0088 symptom byte 02 or 05 is set as current. If only DTC B0085 symptom byte 02 or 05 is set as current Refer to Circuit/System Testing - Only DTC B0085 or B0088 is set. If only DTC B0088 symptom byte 02 or 05 is set as current Refer to Circuit/System Testing - Only DTC B0085 or B0088 is set. If both DTC B0085 or B0088 symptom byte 02 or 05 is set as current Refer to Circuit/System Testing - Both DTC B0085 and B0088 are set. If DTC B0085 or B0088 symptom byte 02 or 05 is not set as current
3. All OK.

Note. The signal circuit is shared at the K36 inflatable restraint sensing and diagnostic module between the B63LF side impact sensor left front and the B63RR side impact sensor right rear (DTC B0085 and DTC B0088). Therefore a short to ground or short to voltage in either of these signal circuits can set a DTC for both circuits, and an open in either circuit should only set its corresponding DTC.

Only DTC B0085 or B0088 is set

1. Vehicle OFF, disconnect the harness connector at the appropriate B63 side impact sensor. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground. If 10 ohms or greater Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module. Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 inflatable restraint sensing and diagnostic module. If less than 10 ohms
3. Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module.
4. Test for less than 2 ohms between the signal circuit terminal 1 at the B63 side impact sensor and the K36 inflatable restraint sensing and diagnostic module terminal listed below: Left front signal terminal 19 X2 Right rear signal terminal 30 X2 If 2 ohms or greater Repair the open/high resistance in the circuit. If less than 2 ohms
5. Vehicle OFF, reconnect all harness connectors, press in the CPA (if equipped) until an audible and/or tactile click is heard.
6. Vehicle in Service Mode, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
7. Verify DTC B0085 or B0088 is not set. If DTC B0085 or B0088 is set Replace the appropriate B63 side impact sensor. If DTC B0085 or B0088 is not set
8. All OK.

Both DTC B0085 and B0088 are set

1. Vehicle OFF. Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 1 V between the signal circuit terminals listed below and ground: Left front signal circuit - terminal 19 X2 Right rear signal circuit - terminal 30 X2 If 1 V or greater Disconnect the harness connector at the B63 side impact sensor that failed the test. Test for less than 1 V between signal circuit and ground. If 1 V or greater, repair the short to voltage in the circuit. If less than 1 V, replace the B63 side impact sensor. If less than 1 V
3. Test for greater than 50k ohms between each signal circuit listed below and ground: Left front signal circuit - terminal 19 X2 Right rear signal circuit - terminal 30 X2 If 50k ohms or less Disconnect the harness connector at the B63 side impact sensor that failed the test. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the B63 side impact sensor. If greater than 50k ohms
4. Replace the K36 inflatable restraint sensing and diagnostic module.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Airbag Side Impact Sensor Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for inflatable restraint sensing and diagnostic module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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

Ignition voltage is between 9-16 V.

Any of the following conditions exist for 10 seconds

B0086 02, B0087 02

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

B0086 05, B0087 05

1. The sensor circuit is open.
2. The inflatable restraint sensing and diagnostic module has not received a message from the sensor for greater than 375 milliseconds.

B0086 39, B0087 39

1. The inflatable restraint sensing and diagnostic module has received a Not OK message from the sensor.
2. The inflatable restraint sensing and diagnostic module has not received a message.

B0086 3A, B0087 3A

1. The inflatable restraint sensing and diagnostic module has received identification message from the sensor, which does not match the identification stored in the inflatable restraint sensing and diagnostic module memory.
2. The inflatable restraint sensing and diagnostic module has reset the impact sensor twice without detecting the correct identification message.

B0086 71, B0087 71

The inflatable restraint sensing and diagnostic module has received invalid serial data from the sensor.

The inflatable restraint sensing and diagnostic module requests the instrument panel cluster to illuminate the AIR BAG indicator.

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

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

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

1. Verify that DTC B0086 or B0087 symptom byte 3A, 39 or 71 is not set as current. If DTC B0086 or B0087 symptom byte 3A, 39 or 71 is set as current Replace the appropriate B63 side impact sensor If DTC B0086 or B0087 symptom byte 3A, 39 or 71 is not set as current
2. Verify that DTC B0086 or B0087 symptom byte 02 or 05 is set as current. If only DTC B0086 symptom byte 02 or 05 is set as current Refer to Circuit/System Testing - Only DTC B0086 or B0087 is set. If only DTC B0087 symptom byte 02 or 05 is set as current Refer to Circuit/System Testing - Only DTC B0086 or B0087 is set. If both DTC B0086 or B0087 symptom byte 02 or 05 is set as current Refer to Circuit/System Testing - Both DTC B0086 and B0087 are set. If DTC B0086 or B0087 symptom byte 02 or 05 is not set as current
3. All OK.

Note. The signal circuit is shared at the K36 inflatable restraint sensing and diagnostic module between the B63RF side impact sensor right front and the B63LR side impact sensor left rear (DTC B0086 and DTC B0087). Therefore a short to ground or short to voltage in either of these signal circuits can set a DTC for both circuits, and an open in either circuit should only set its corresponding DTC.

Only DTC B0086 or B0087 is set

1. Vehicle OFF, disconnect the harness connector at the appropriate B63 side impact sensor. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 10 ohms between the low reference circuit terminal 2 and ground. If 10 ohms or greater Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module. Test for less than 2 ohms in the low reference circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 inflatable restraint sensing and diagnostic module. If less than 10 ohms
3. Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module.
4. Test for less than 2 ohms between the signal circuit terminal 1 at the B63 side impact sensor and the K36 inflatable restraint sensing and diagnostic module terminal listed below: Right front signal terminal 22 X2 Left rear signal terminal 27 X2 If 2 ohms or greater Repair the open/high resistance in the circuit. If less than 2 ohms
5. Vehicle OFF, reconnect all harness connectors, press in the CPA (if equipped) until an audible and/or tactile click is heard.
6. Vehicle in Service Mode, clear DTCs. Operate the vehicle within the Conditions for Running the DTC.
7. Verify DTC B0086 or B0087 is not set. If DTC B0086 or B0087 is set Replace the appropriate B63 side impact sensor. If DTC B0086 or B0087 is not set
8. All OK.

Both DTC B0086 and B0087 are set

1. Vehicle OFF. Disconnect the X2 harness connector at the K36 inflatable restraint sensing and diagnostic module. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for greater than 50k ohms between each signal circuit listed below and ground: Right front signal circuit - terminal 22 X2 Left rear signal circuit - terminal 27 X2 If 50k ohms or less Disconnect the harness connector at the B63 side impact sensor that failed the test. Test for infinite resistance between the signal circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance, replace the B63 side impact sensor. If greater than 50k ohms
3. Test for less than 1 V between the signal circuit terminals listed below and ground: Right front signal circuit - terminal 22 X2 Left rear signal circuit - terminal 27 X2 If 1 V or greater Disconnect the harness connector at the B63 side impact sensor that failed the test. Test for less than 1 V between signal circuit and ground. If 1 V or greater, repair the short to voltage in the circuit. If less than 1 V, replace the B63 side impact sensor. If less than 1 V
4. Replace the K36 inflatable restraint sensing and diagnostic module.

Perform the Diagnostic Repair Verification after completing the repair.

1. «Airbag Side Impact Sensor Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for inflatable restraint sensing and diagnostic module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The passenger air bag ON/OFF indicators are used to notify the driver when the passenger presence system has enabled or disabled the passenger instrument panel air bag. When the Vehicle is turned ON, the ignition voltage is supplied to the passenger presence module. When the inflatable restraint sensing and diagnostic module (SDM) receives the appropriate serial data message from the passenger presence module the SDM will then provide voltage to the appropriate indicator.

1. The Vehicle is in Service mode
2. Ignition Voltage is between 9-16 V

The SDM detects improper voltage on the control circuit of the passenger air bag ON or OFF indicator

Actions Taken When the DTC Sets

1. The inflatable restraint sensing and diagnostic module requests the instrument cluster to illuminate the AIR BAG indicator.
2. Passenger air bag ON and OFF indicators are disabled.

The condition for setting the DTC no longer exists.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. The passenger air bag ON and OFF indicators may not operate as expected if there are supplemental inflatable restraint (SIR) DTCs. Repair all SIR DTCs before proceeding with this diagnostic.

1. Vehicle in Service Mode.
2. With a scan tool command the passenger air bag ON indicator and passenger air bag OFF indicator ON and OFF. The respective indicators should turn ON and OFF as commanded.
3. Verify the passenger air bag ON indicator and passenger air bag OFF indicators turn ON and OFF when commanded ON and OFF with a scan tool. If the passenger air bag indicators do not change Refer to Circuit/System Testing If the passenger air bag indicators change
4. All OK.

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

1. Vehicle OFF, disconnect the harness connector at the P14 passenger air bag disable indicator. Test for less than 10 ohms between the ground circuit terminal 2 and ground. If 10 ohms or greater Repair the open/high resistance in the circuit. If less than 10 ohms
2. Vehicle in Service Mode, with a scan tool, command the passenger air bag OFF indictor OFF. Test for less than 11 V between the control circuit terminal 3 and ground. If 11 V or greater Vehicle OFF. Disconnect the X1 harness connector at the K36 inflatable restraint sensing and diagnostic module. Vehicle in Service Mode. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 inflatable restraint sensing and diagnostic module. If less than 11 V
3. With a scan tool, command the passenger air bag OFF indicator ON. Test for greater than 4 V between the control circuit terminal 3 and ground. If 4 V or less Disconnect the X1 harness connector at the K36 inflatable restraint sensing and diagnostic module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. Test for less than 2 ohms in each control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 inflatable restraint sensing and diagnostic module. If greater than 4 V
4. With a scan tool, command the passenger air bag ON indicator OFF. Test for less than 11 V between the control circuit terminal 1 and ground. If 11 V or greater Vehicle OFF. Disconnect the X1 harness connector at the K36 inflatable restraint sensing and diagnostic module. Vehicle in Service Mode. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 inflatable restraint sensing and diagnostic module. If less than 11 V
5. With a scan tool, command the passenger air bag ON indicator ON. Test for greater than 4 V between the control circuit terminal 1 and ground. If 4 V or less Disconnect the X1 harness connector at the K36 inflatable restraint sensing and diagnostic module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. Test for less than 2 ohms in each control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 inflatable restraint sensing and diagnostic module. If greater than 4 V
6. Replace the P14 passenger air bag disable indicator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Instrument Panel Airbag Arming Status Display Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for K36 inflatable restraint sensing and diagnostic module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category

The inflatable restraint sensing and diagnostic module (SDM) stores a primary data key, which is a 4-digit number. When the ignition is turned ON, the inflatable restraint sensing and diagnostic module compares this information to the information stored in the Body Control Module (BCM) via serial data. If there is a mismatch between the information stored in the inflatable restraint sensing and diagnostic module and Body Control Module, DTC B1001 will set.

System voltage is between 9-16 V.

The 4-digit Primary Data Key stored in the inflatable restraint sensing and diagnostic module does not match the 4 digits stored in the Body Control Module.

1. The inflatable restraint sensing and diagnostic module requests the instrument cluster to illuminate the AIR BAG indicator.
2. The inflatable restraint sensing and diagnostic module disables all deployments.

The last 4-digit Primary Data Key in the inflatable restraint sensing and diagnostic module matches the last 4 digits stored in the Body Control Module.

1. This DTC is an indication that an incorrect inflatable restraint sensing and diagnostic module is installed in the vehicle, or that the inflatable restraint sensing and diagnostic module and/or the Body Control Module was replaced without reprogramming the Body Control Module with the new information.
2. If the inflatable restraint sensing and diagnostic module was previously programmed and DTC B1001 is now set, the setup portion of program was not completed. Proceed to the inflatable restraint sensing and diagnostic module Setup portion of the «Inflatable Restraint Sensing and Diagnostic Module Programming and Setup»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__inflatable-restraint-sensing-and-diagnostic-module)

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
4. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)

Scan Tool Reference

Control Module References for scan tool information

1. Verify the scan tool K36 Inflatable Restraint Sensing and Diagnostic Module Primary Key Status paramater is Valid. If the K36 Inflatable Restraint Sensing and Diagnostic Module Primary Key Status parameter is Invalid Perform the K36 Inflatable Restraint Sensing and Diagnostic Module setup. Refer to «Inflatable Restraint Sensing and Diagnostic Module Programming and Setup»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__inflatable-restraint-sensing-and-diagnostic-module) . If the K36 Inflatable Restraint Sensing and Diagnostic Module Primary Key Status parameter is Valid
2. All OK.

Perform the Diagnostic Repair Verification after completing the repair.

1. «SIR/SRS Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__sirsrs-wiring-repairs)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for K36 Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The Inflatable Restraint Sensing and Diagnostic Module (SDM) stores a 4-digit primary key for the Passenger Presence Module. The Inflatable Restraint Sensing and Diagnostic Module sends the Passenger Presence Module the primary key. If the Passenger Presence Module determines that it is the wrong primary key, the Passenger Presence Module will set DTC B1001 and send the Inflatable Restraint Sensing and Diagnostic Module a vehicle mismatch message. The Inflatable Restraint Sensing and Diagnostic Module then will set DTC B0081 and illuminate the SIR warning indicator. The Passenger Presence Module does not use a secondary key.

Ignition voltage is between 9-16 volts.

The 4-digit primary key stored in the Inflatable Restraint Sensing and Diagnostic Module does not match the 4-digit key stored in the Passenger Presence Module.

1. The Inflatable Restraint Sensing and Diagnostic Module requests the instrument panel cluster to illuminate the AIR BAG indicator.
2. The passenger instrument panel air bag deployment is disabled.

The 4-digit Primary Key in the Inflatable Restraint Sensing and Diagnostic Module and in the Passenger Presence Module match.

This DTC is an indication that the passenger presence system module was not set-up correctly, is not the correct part number or that the Passenger Presence Module is defective.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)
5. «SIR/SRS Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__sirsrs-wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected. Passenger Presence Module Passenger Presence Module wiring harness

1. Verify the correct K85 Passenger Presence Module part number has been installed If the K85 Passenger Presence Module installed has an incorrect part number, replace the K85 Passenger Presence Module If the K85 Passenger Presence Module installed has a correct part number
2. Verify that DTC B1001 is not set as current in the K85 Passenger Presence Module. If DTC is set as current, . If Inflatable Restraint Sensing and Diagnostic Module part number is correct Verify the Inflatable Restraint Sensing and Diagnostic Module part number is correct. If the K36 Inflatable Restraint Sensing and Diagnostic Module part number is incorrect, replace the K36 Inflatable Restraint Sensing and Diagnostic Module If the K36 Inflatable Restraint Sensing and Diagnostic Module part number is correct Replace the K85 Passenger Presence Module If the DTC is no set as current
3. All OK.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for K85 Passenger Presence Module and K36 Inflatable Restraint Sensing and Diagnostic Module replacement, setup, and programming

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The inflatable restraint sensing and diagnostic module (SDM) monitors the number of safety components installed on the vehicle. When the Vehicle is turned ON, the Inflatable Restraint Sensing and Diagnostic Module evaluates the number of safety components installed and compares it to the number of components the Inflatable Restraint Sensing and Diagnostic Module expects to see on the vehicle with its current calibration. If there is a mismatch between detected components and the components programmed with the Inflatable Restraint Sensing and Diagnostic Module calibration, DTC B1019 will set. The components (if equipped) that the Inflatable Restraint Sensing and Diagnostic Module will detect include inflatable restraint deployment loops, impact sensors, passenger presence system components, seat position sensors, disable switches, and seat belt switches.

Ignition voltage is between 9-16 V.

The setup for the Inflatable Restraint Sensing and Diagnostic Module has not been completed and the Inflatable Restraint Sensing and Diagnostic Module does not detect the correct number of sensors or deployment loops than is expected with this calibration.

1. The Inflatable Restraint Sensing and Diagnostic Module requests the Instrument Cluster to illuminate the AIR BAG warning indicator.
2. The DTC must be cleared before running the setup Inflatable Restraint Sensing and Diagnostic Module.
3. Air bag indicator will continue to flash until Inflatable Restraint Sensing and Diagnostic Module setup procedure is complete.

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

The Inflatable Restraint Sensing and Diagnostic Module scan tool deployment loop and impact sensor data will match what the Inflatable Restraint Sensing and Diagnostic Module has been programmed to expect to see on the vehicle. B1019 DTC will set if a deployment loop or impact sensor is added or removed from the system.

DTC B1019 will set when an open/high resistance DTC sets for a deployment loop or impact sensor. This causes mismatch between the learned and actual components connected to the Inflatable Restraint Sensing and Diagnostic Module.

DTC B1019 can set with no other DTCs if an unused deployment loop or impact sensor circuit is shorted to ground. This causes a mismatch between the learned and actual components connected to the Inflatable Restraint Sensing and Diagnostic Module.

Schematic Reference

1. «Seat Belt Schematics»(/cadillac/elr/i-2013-2015/remont/restraints-control-systems/#seat-belt-system)
2. «SIR Schematics»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

1. «Seat Belt System Description and Operation»(/cadillac/elr/i-2013-2015/remont/restraints-control-systems/#seat-belt-system)
2. «Supplemental Inflatable Restraint System Description and Operation»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. DTC B1019 can set after the inflatable restraint sensing and diagnostic module has been replaced and/or reprogrammed before the setup procedure is completed. The setup procedure cannot be completed if DTC B1019 is set as current or history. If a short or open is detected in a deployment circuit prior to the setup procedure being performed, the inflatable restraint sensing and diagnostic module will set DTC B1019.

1. Vehicle in Service Mode.
2. Verify no other Inflatable Restraint Sensing and Diagnostic Module DTCs are set. If other inflatable restraint sensing and diagnostic module DTCs are set Diagnose those DTCs first. Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) If no other inflatable restraint sensing and diagnostic module DTCs are set
3. Verify the impact sensors called out in the scan tool data list match the number of actual impact sensors installed on the vehicle. If the number of impact sensors do not match Verify the correct Inflatable Restraint Sensing and Diagnostic Module calibration file is loaded in the inflatable restraint sensing and diagnostic module. If the inflatable restraint sensing and diagnostic module calibration file is correct and the vehicle contains an incorrect number of sensors, identify which sensors are missing to make the vehicle match the inflatable restraint sensing and diagnostic module impact sensor calibration scan tool data list. If the calibration file is incorrect Reprogram the Inflatable Restraint Sensing and Diagnostic Module. Refer to «Inflatable Restraint Sensing and Diagnostic Module Programming and Setup»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__inflatable-restraint-sensing-and-diagnostic-module) If the number of impact sensors match
4. Verify the enabled deployment loops called out in the scan tool data list match the deployment loops installed on the vehicle. If the number of enabled deployment loops do not match Verify the correct Inflatable Restraint Sensing and Diagnostic Module calibration file is loaded in the inflatable restraint sensing and diagnostic module. If the inflatable restraint sensing and diagnostic module calibration file is correct and the vehicle contains an incorrect number of loops, identify which deployment loops are missing to make the vehicle match the inflatable restraint sensing and diagnostic module impact sensor calibration scan tool data list. If the calibration file is incorrect Reprogram the Inflatable Restraint Sensing and Diagnostic Module. Refer to «Inflatable Restraint Sensing and Diagnostic Module Programming and Setup»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__inflatable-restraint-sensing-and-diagnostic-module) If the number of enabled deployment loops match
5. Verify a passenger presence system is equipped on the vehicle. If a passenger presence system is not equipped on the vehicle Replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If a passenger presence system is equipped on the vehicle
6. Verify the passenger presence enable status called out in the scan tool data list is enabled. If the passenger presence enable status is not enabled Refer to «Inflatable Restraint Sensing and Diagnostic Module Programming and Setup»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__inflatable-restraint-sensing-and-diagnostic-module) If the passenger presence is enabled
7. Verify the passenger presence learn status called out in the scan tool data list is learned. If the passenger presence learn status is not learned Verify the scan tool can communicate with the passenger presence system. If the scan tool will not communicate with the passenger presence system, refer to «Scan Tool Does Not Communicate with Low Speed GMLAN Device»(/cadillac/elr/i-2013-2015/remont/communication-devices/#data-communication-system-dtc-u183e-to-dtc-u2612-and-diagnostic-information-and-procedures) If the scan tool communicates Vehicle OFF, disconnect the scan tool, wait two minutes. Vehicle in Service Mode, verify DTC B1019 is not set as current. If the DTC is set as current, refer to «Inflatable Restraint Sensing and Diagnostic Module Programming and Setup»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__inflatable-restraint-sensing-and-diagnostic-module) If the DTC is not set as current All OK. If the passenger presence learn status is learned
8. Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «SIR/SRS Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__sirsrs-wiring-repairs)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

Introduction

The inflatable restraints passenger presence system is a calibrated system that requires re-zeroing or a zero check anytime the seat cushion trim attachments have been removed or the passenger presence system has been replaced. The procedures below are designed to assist in the re-zeroing of the passenger presence system. Before you start, read these procedures carefully and completely. For further information regarding the passenger presence system refer to Supplemental Inflatable Restraint System Description and Operation .

Note. The following procedures must be followed

1. Read this procedure carefully and completely.
2. The passenger presence system will not function properly if the passenger presence system re-zeroing procedure is not performed.
3. Perform the «Diagnostic Repair Verification»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-repair-verification) after successfully completing the re-zeroing procedure to ensure the system is functioning properly.

Passenger Presence System Re-zeroing Procedure

Note. Before the passenger presence system can be re-zeroed the front passenger seat must be completely empty of all items. The presence of any items on the front passenger seat will affect the calibration and operation of the passenger presence system. DTC B0081 will set if the re-zero system test is performed with: An aftermarket seat heater located too close to the sensor mat A scan tool, laptop, or other electronic device is in the seat The seat is damp or wet An object or person is in the seat

1. Make sure that temperature is between 32°F to 100°F before running a Re-zero procedure.
2. Empty the front outboard passenger seat.
3. Verify that all SIR and passenger presence system components, connectors, and connector position assurances are properly connected and mounted.
4. Install a scan tool.
5. Vehicle ON, with a scan tool, perform the Passenger Presence Sensor Learn procedure.
6. If the test fails, confirm that the seat is empty. Perform the Passenger Presence Sensor Learn test again. If the test fails again, verify DTC B0081 is not set as current. If the DTC is set refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) . If the test successfully completed, Vehicle OFF.
7. After the passenger presence system has been successfully re-zeroed, perform the «Diagnostic Repair Verification»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-repair-verification) .

Symptoms - SIR

1. Perform «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) before using the symptom tables in order to verify that all of the following are true: There are no DTCs set. The inflatable restraint sensing and diagnostic module (SDM) can communicate via the serial data link.
2. Review the SIR system description and operation in order to familiarize yourself with the system functions. Refer to «Supplemental Inflatable Restraint System Description and Operation»(/cadillac/elr/i-2013-2015/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/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

Intermittent

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

Symptom List

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

Airbag Indicator Malfunction (Passenger) , Airbag Indicator Malfunction (Driver) in order to diagnose the symptom.

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The passenger air bag ON/OFF indicators are used to notify the driver when the passenger presence system has enabled or disabled the passenger instrument panel air bag. When the ignition is turned ON, the ignition voltage is supplied to the passenger presence module. When the Inflatable Restraint Sensing and Diagnostic Module (SDM) receives the appropriate serial data message from the passenger presence module the Inflatable Restraint Sensing and Diagnostic Module will then provide voltage to the appropriate indicator.

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Note. The passenger air bag ON and OFF indicators may not operate as expected if there are supplemental inflatable restraint (SIR) DTCs. Repair all SIR DTCs before proceeding with this diagnostic.

1. Vehicle in Service Mode.
2. With a scan tool command the passenger air bag ON indicator and passenger air bag OFF indicator ON and OFF. The respective indicators should turn ON and OFF as commanded.

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

1. Vehicle OFF.
2. Disconnect the harness connector at the P14 Passenger Air Bag Disable Indicator.
3. Test for less than 10 ohms between the ground circuit terminal 2 and ground. If 10 ohms or greater Repair the open/high resistance in the circuit. If less than 10 ohms
4. Vehicle in Service Mode.
5. With a scan tool, command the passenger air bag OFF indictor OFF.
6. Test for less than 11 V between the control circuit terminal 3 and ground. If 11 V or greater Vehicle OFF. Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Vehicle in Service Mode. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 11 V
7. With a scan tool, command the passenger air bag OFF indicator ON.
8. Test for greater than 4 V between the control circuit terminal 3 and ground. If 4 V or less Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. Test for less than 2 ohms in each control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 4 V
9. With a scan tool, command the passenger air bag ON indicator OFF.
10. Test for less than 11 V between the control circuit terminal 1 and ground. If 11 V or greater Vehicle OFF. Disconnect the X1 harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Vehicle in Service Mode. Test for less than 1 V between the control circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If less than 11 V
11. With a scan tool, command the passenger air bag ON indicator ON.
12. Test for greater than 4 V between the control circuit terminal 1 and ground. If 4 V or less Disconnect the harness connector at the K36 Inflatable Restraint Sensing and Diagnostic Module. Test for infinite resistance between the control circuit and ground. If less than infinite resistance, repair the short to ground on the circuit. Test for less than 2 ohms in each control circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K36 Inflatable Restraint Sensing and Diagnostic Module. If greater than 4 V
13. Replace the P14 Passenger Air Bag Disable Indicator.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Instrument Panel Airbag Arming Status Display Replacement»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for K36 Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

1. Perform the «Diagnostic System Check - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

With the Vehicle in Service Mode, during the bulb check, the driver air bag indicator will flash, and then turn OFF after the 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 Inflatable Restraint Sensing and Diagnostic Module will request the instrument cluster 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 of 9-16 V, the Inflatable Restraint Sensing and Diagnostic Module will command the instrument cluster to illuminate the air bag indicator ON, even with no DTCs present, and then disable all deployment loops.

1. A DTC B1370 may set if the ignition 1 circuit is outside the 9-16 V range.
2. A flashing driver air bag indicator is displayed if the inflatable restraint sensing and diagnostic module was programmed but did not fully complete the programming. For a flashing driver airbag indicator, refer to «Inflatable Restraint Sensing and Diagnostic Module Programming and Setup»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__inflatable-restraint-sensing-and-diagnostic-module) .

Schematic Reference

SIR Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEWS - INDEX

Description and Operation

Supplemental Inflatable Restraint System Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__circuit-testing)
2. «Testing for Intermittent Conditions and Poor Connections»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__testing-for-intermittent-conditions-and-poor)
3. «Connector Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__connector-repairs)
4. «Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

If the driver air bag indicator is flashing, refer to Inflatable Restraint Sensing and Diagnostic Module Programming and Setup .

1. Vehicle in Service Mode. With a scan tool, verify Inflatable Restraint Sensing and Diagnostic Module DTCs are not set. If Inflatable Restraint Sensing and Diagnostic Module DTCs are set Refer to «Diagnostic Trouble Code (DTC) List - Vehicle»(/cadillac/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures__diagnostic-trouble-code-dtc-list) . If Inflatable Restraint Sensing and Diagnostic Module DTCs are not set
2. With a scan tool command the Instrument Cluster to turn all instrument cluster indicators ON and OFF. The air bag indicator should turn ON and OFF as commanded. If air bag indicator does not turn on or off If the air bag indicator does not turn ON and OFF as expected, replace the P16 Instrument Cluster. If air bag indicator does turn on or off
3. Replace the K36 Inflatable Restraint Sensing and Diagnostic Module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «SIR/SRS Wiring Repairs»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-diagnostic-information-and-procedures__sirsrs-wiring-repairs)
2. «Control Module References»(/cadillac/elr/i-2013-2015/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for Instrument Cluster or Inflatable Restraint Sensing and Diagnostic Module replacement, programming and setup

SIR Disabling and Enabling

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

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

SIR Service Precautions

The Inflatable Restraint Sensing and Diagnostic Module (SDM) maintains a reserved energy supply. The reserved energy supply provides deployment power for the air bags if the Inflatable Restraint Sensing and Diagnostic Module loses battery power during a collision. Deployment power is available for as much as 2 minutes after disconnecting the vehicle power. Waiting 2 minutes before working on the system after disabling the SIR system prevents deployment of the air bags from the reserved energy supply.

General Service Instructions

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

1. Do not expose air bags to temperatures above 65°C (149°F).
2. Verify the correct replacement part number. Do not substitute a component from a different vehicle.
3. Use only original GM replacement parts available from your authorized GM dealer. Do not use salvaged parts for repairs to the SIR system.

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

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

Disabling Procedure - Air Bag Fuse

1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
2. Vehicle OFF.
3. Locate and remove the fuse(s) supplying power to the Inflatable Restraint Sensing and Diagnostic Module. Refer to «SIR Schematics»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system) , or «Electrical Center Identification Views»(/cadillac/elr/i-2013-2015/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-electrical-center-identification-views) .
4. Wait 2 minutes before working on the system.

Enabling Procedure - Air Bag Fuse

1. Vehicle OFF.
2. Install the fuse(s) supplying power to the Inflatable Restraint Sensing and Diagnostic Module. Refer to «SIR Schematics»(/cadillac/elr/i-2013-2015/remont/airbag/#supplemental-inflatable-restraint-system) , or «Electrical Center Identification Views»(/cadillac/elr/i-2013-2015/remont/electrical-component-locations/#wiring-systems-and-power-management-component-locator-electrical-center-identification-views) .
3. Vehicle in Service Mode. 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/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) .

Disabling Procedure - Negative Battery Cable

1. Turn the steering wheel so that the vehicles wheels are pointing straight ahead.
2. Vehicle OFF.
3. Disconnect the negative battery cable from the battery. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/elr/i-2013-2015/remont/body-electrical/#battery-charging-system-and-starting-system) .
4. Wait 2 minutes before working on system.

Enabling Procedure - Negative Battery Cable

1. Vehicle OFF.
2. Connect the negative battery cable to the battery. Refer to «Battery Negative Cable Disconnection and Connection»(/cadillac/elr/i-2013-2015/remont/body-electrical/#battery-charging-system-and-starting-system) .
3. Vehicle in Service Mode. 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/elr/i-2013-2015/remont/oem-general-information/#vehicle-diagnostic-information-diagnostic-information-and-procedures) .

General Service Instructions

Note. The Inflatable Restraint Sensing and Diagnostic Module (SDM) maintains a reserved energy supply. The reserved energy supply provides deployment power for the SIR air bags. Deployment power may be available for up to 2 minutes after disconnecting the vehicle power. Disabling the SIR system prevents deployment of the SIR air bags from the reserved energy supply.

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

1. Do not expose air bags to temperatures above 85 °C (185 °F)
2. Verify the correct replacement part number. Do not substitute a component from a different vehicle
3. Use only original GM replacement parts available from your authorized GM dealer. Do not use salvaged parts for repairs to the SIR system

Note. Discard any of the following components if it has been dropped from a height of 80 cm (15.75 in) or greater

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

Scheme 5

Airbag Side Impact Sensor Replacement

Scheme 6

Airbag Sensing and Diagnostic Module Replacement

Scheme 7

Steering Wheel Airbag Replacement

Scheme 8

Steering Wheel Airbag Coil Replacement

Airbag Steering Wheel Module Coil Centering

1. Remove the wire harness strap(s) where necessary.
2. Inspect the inflatable restraint steering wheel module coil. If the yellow lock pin (1) is present, the uplead post (2) is at the 12:00 position and the loop (u-turn) appears in the centering window (3) then the coil is already in the centered position and no further action is required.
3. If the coil needs to be centered, perform the following preliminary steps: The wheels on the vehicle are straight ahead. The block tooth (1) on the steering shaft is in the 12 o'clock position. The ignition switch is in the LOCK position.
4. To center the coil, perform the following steps: Hold the coil with the face up. Slowly rotate the coil hub clockwise until the coil ribbon stops. Slowly rotate the coil hub counterclockwise approximately 2.5 turns until the uplead post (2) is at the 12:00 position. View the centering window (3) and ensure the loop (u-turn) is visible. If the loop is visible then the coil is in the CENTER position. While holding the coil hub in the CENTER position, align the coil with the steering column components and slide onto the steering shaft.
5. If a double wire harness strap is installed onto the wire harness assembly and steering column, the wires must be routed up against the column. One wire harness strap will surround one lead from the coil to the steering column. The other wire harness strap will surround all other leads to the steering column.

Scheme 9

Instrument Panel Airbag Replacement

Scheme 10

Instrument Panel Lower Airbag Replacement - Driver Side

Scheme 11

Instrument Panel Lower Airbag Replacement - Passenger Side

Scheme 12

Airbag Front End Discriminating Sensor Replacement

Scheme 13

Airbag Front Seat Position Sensor Replacement

Scheme 14

Front and Rear Row Seat Roof Rail Airbag Replacement

Scheme 15

Front Seat Outboard Seat Back Airbag Replacement

Scheme 16

Airbag Side Impact Center Pillar Sensor Replacement

Scheme 17

Instrument Panel Airbag Arming Status Display Replacement

Scheme 18

Front Seat Belt Retractor Replacement

Scheme 19

Front Seat Belt Anchor Plate Tensioner Replacement

Accident With or Without Air Bag Deployment - Component Inspections

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

1. The high voltage system-Inspect the high voltage system. Refer to «High Voltage System Inspection»(/cadillac/elr/i-2013-2015/remont/body-electrical/#hybridev-energy-storage-system) .
2. The steering column-Inspect the steering column for bending, twisting, buckling or any type of damage.
3. The instrument panel knee bolsters and mounting points-Inspect the knee bolsters for bending, twisting, buckling, or any other type of damage.
4. The instrument panel brackets, braces, etc.-Inspect for bending, twisting, buckling, or any other type of damage.
5. The seat belts-Perform the seat belt operational and functional checks. Refer to «Repairs and Inspections Required After a Collision»(/cadillac/elr/i-2013-2015/remont/restraints-control-systems/#seat-belt-system__repairs-and-inspections-required-after-a) .
6. The instrument panel cross car beam-Inspect for bending, twisting, buckling, or any other type of damage.
7. The instrument panel mounting points and brackets-Inspect for bending, twisting, buckling, or any other type of damage.
8. The seats and seat mounting points-Inspect for bending, twisting, buckling, or any other type of damage.
9. The roof and headliner mounting points.
10. The brake pedal --Inspect the brake pedal for bending, twisting, buckling or any type of damage.

Accident With Frontal Air Bag Deployment - Component Replacement and Inspections

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

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

Perform additional inspections on the following components.

1. Steering wheel air bag coil and the coil wiring pigtail-Inspect for melting, scorching, or other damage due to excessive heat.
2. Mounting points or mounting hardware for the passenger instrument panel air bag, steering wheel air bag, SDM, seat side air bag (if deployed) and seat belt anchor and/or retractor pretensioners-Inspect for any damage and repair or replace each component as needed.

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

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

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

Perform additional inspections on the following components.

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

Impact Sensor Replacement Guidelines

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

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

Impact sensor damage which is not visible, such as slight bending of the mounting bracket or cuts in the wire insulation, can cause improper operation of the SIR system. Do not try to determine whether the impact sensor is undamaged, replace the impact sensor. Also, if you follow a diagnostic trouble code (DTC) procedure and a malfunctioning impact sensor is indicated, replace the impact sensor.

Inflatable Restraint Module Handling and Scrapping

Special Tools

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

For equivalent regional tools, refer to Special Tools .

Live and Undeployed Air Bag

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

Dual Stage Air Bags

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

Scrapping Procedure

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

Do not deploy the air bag in the following situations

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

Deployment Procedures

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

You can deploy the air bag either inside or outside of the vehicle. The method used depends upon the final disposition of the vehicle. Review the following procedures in order to determine which will work best in a given situation

Deployment Outside Vehicle - Steering Wheel Air Bag, Instrument Panel Air Bag, and Roof Rail Air Bag

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

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

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

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

Deployment Inside Vehicle - Vehicle Scrapping Procedure

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

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

1. Lower the driver and passenger windows.
2. Vehicle OFF, and remove the key(s) from vehicle.
3. Check that all air bags which will be deployed are mounted securely.
4. Remove all loose objects from the front seats.
5. Disconnect the steering wheel air bag yellow connector (1) from vehicle harness yellow connector (3).
6. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
7. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
8. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gauge) or thicker multi-strand wire. Use these wires to fabricate the driver deployment harness.
9. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
10. Twist together one end from each of the wires in order to short the wires. Deployment wires shall remain shorted, and not connected to a power source until you are ready to deploy the air bag.
11. Twist together the 2 connector wire leads from the high circuits from both stages of the steering wheel air bag, to one set of deployment wires. Refer to «Component Connector End Views»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-q63-to-x98) in order to determine the correct circuits.
12. Inspect that the 3-wire connection is secure.
13. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
14. Twist together the 2 connector wire leads from the low circuits from both stages of the steering wheel air bag, to one set of deployment wires. Refer to «Component Connector End Views»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-q63-to-x98) in order to determine the correct circuits.
15. Inspect that the 3-wire connection is secure.
16. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
17. Connect the deployment harness to the connector on the steering wheel air bag.
18. Route the deployment harness out of the driver side of the vehicle.
19. Disconnect the yellow left roof rail harness connector from the vehicle harness connector.
20. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
21. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
22. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gauge) or thicker multi-strand wire. These wires will be used to fabricate the roof rail air bag deployment harness.
23. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
24. Twist together one end from each of the wires in order to short the wires.
25. Twist together one connector wire lead to one deployment wire.
26. Secure and insulate the connection using electrical tape.
27. Twist together and tape the remaining connector wire lead to the remaining deployment wire.
28. Connect the deployment harness to the yellow connector of the roof rail air bag.
29. Route the deployment harness out of the driver side of the vehicle.
30. Disconnect the instrument panel air bag yellow harness connector (1) from the vehicle harness connector (2).
31. Cut the yellow harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
32. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
33. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gauge) or thicker multi-strand wire. These wires will be used to fabricate the passenger deployment harness.
34. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
35. Twist together one end from each of the wires in order to short the wires.
36. Twist together the 2 connector wire leads from the high circuits from both stages of the instrument panel air bag to one set of deployment wires. Refer to «Component Connector End Views»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-q63-to-x98) in order to determine the correct circuits.
37. Inspect that the 3-wire connection is secure.
38. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
39. Twist together the 2 connector wire leads from the low circuits from both stages of the instrument panel air bag to one set of deployment wires. Refer to «Component Connector End Views»(/cadillac/elr/i-2013-2015/remont/body-electrical/#wiring-systems-and-power-management-component-connector-end-views-q63-to-x98) in order to determine the correct circuits.
40. Inspect that the 3-wire connection is secure.
41. Secure and insulate the 3-wire connection to the deployment harness using electrical tape.
42. Connect the deployment harness to the instrument panel air bag in-line connector.
43. Route the deployment harness out of the passenger side of the vehicle.
44. Disconnect the yellow harness connector to the right roof rail air bag from the vehicle harness connector.
45. Cut the harness connector out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
46. Strip 13 mm (0.5 in) of insulation from each of the connector wire leads.
47. Cut two 6.1 m (20 ft) deployment wires from a 0.8 mm (18 gauge) or thicker multi-strand wire. These wires will be used to fabricate the roof rail air bag deployment harness.
48. Strip 13 mm (0.5 in) of insulation from both ends of the wires.
49. Twist together one end from each of the wires in order to short the wires.
50. Twist together one connector wire lead to one deployment wire.
51. Secure and insulate the connection using electrical tape.
52. Twist together and tape the remaining connector wire lead to the remaining deployment wire.
53. Connect the deployment harness to the roof rail air bag yellow connector.
54. Route the deployment harness out of the passenger side of the vehicle.
55. Completely cover the windshield and the front door window openings with a drop cloth.
56. Stretch to the full length all of the deployment harness wires on the right side of the vehicle.
57. Deploy each deployment loop one at a time.
58. Place a power source, 12 V minimum/2A minimum, such as a vehicle battery, near the shorted end of the harnesses.
59. Separate one set of wires and touch the wire ends to the power source in order to deploy the selected air bag.
60. Disconnect the deployment harness from the power source and twist the wire ends together.
61. Continue the same process with the remaining deployment harnesses.
62. Disconnect all harnesses from the vehicle.
63. Discard the harnesses.
64. Scrap the vehicle in the same manner as a non-SIR equipped vehicle.
65. If one or all of the air bags did not deploy, remove the undeployed air bags from the vehicle.

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

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

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

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

Deployment Inside the Vehicle

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

Deployment Outside Vehicle for Seat Belt Pretensioners

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

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

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

Special Tools

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

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

SIR System Overview

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

AIR BAG Indicator (Driver)

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

Inflatable Restraint Sensing and Diagnostic Module (SDM)

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

Air Bags

This vehicle contains 8 air bags. The 8 air bags are located in the steering wheel (dual air bags), instrument panel (passenger side) (dual air bags), driver seat side (B-pillar), passenger seat side (B-pillar), left roof rail, right roof rail, driver knee (instrument panel), passenger knee (instrument panel). To view the locations of the air bags refer to Master Electrical Component List . Air bags contain a housing, inflatable air bag, two initiating devices (if dual air bag), canister of gas generating material and, in some cases, stored compressed gas. The deployment loops supply current through the air bags to deploy the air bags. The steering wheel and passenger instrument panel air bags have two stages of deployment, which varies the amount of restraint to the occupant according to the collision severity. For moderate frontal collisions the air bags deploy at less than full deployment which consists of stage 1 of the air bag. For more severe frontal collisions a full deployment is initiated which consists of stage 1 and stage 2 of the air bag. The current passing through the air bags ignite the material in the canister producing a rapid generation of gas and is some cases, the release of compressed gas. The gas produced from this reaction rapidly inflates the air bag. Once the air bag is inflated it quickly deflates through the air bag vent holes and/or the bag fabric. Each air bag is equipped with a shorting bar located in the connectors of the air bag. The shorting bar shorts the air bag deployment loop circuitry to prevent unwanted deployment of the air bag when it is disconnected.

Seat Belt Pretensioners (Anchor and Retractor)

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

Impact Sensors

This vehicle contains 6 impact sensors. The 6 impact sensors are located in the front of the vehicle (2, left and right), and one in each of the four doors. To view the locations of the impact sensors refer to Master Electrical Component List . The impact sensors contain a sensing device which monitors vehicle acceleration and velocity changes to detect side collisions that are severe enough to warrant air bag deployment. The impact sensor are not part of the deployment loop, but instead provide input to the SDM. The SDM contains a microprocessor that performs calculations using the measured accelerations and compares these calculations to a value stored in memory. When the generated calculations exceed the stored value, the SDM will cause current to flow through the deployment loops deploying the appropriate air bags.

Passenger Presence Detection System and Air Bag Indicator (Passenger)

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

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

Seat Belt Indicators

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

Special Tools

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

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• COMPONENT CONNECTOR END VIEWS - INDEX
• Circuit Testing
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Connector Repairs
• Control Module References
• Diagnostic Repair Verification
• Passenger Presence System Programming and Setup
• Diagnostic Trouble Code (DTC) List - Vehicle
• SIR/SRS Wiring Repairs
• Inflatable Restraint Sensing and Diagnostic Module Programming and Setup
• Seat Belt Schematics
• Scan Tool Does Not Communicate with Low Speed GMLAN Device
• Checking Aftermarket Accessories
• Master Electrical Component List
• Electrical Center Identification Views
• Battery Negative Cable Disconnection and Connection
• Front Side Door Trim Replacement
• Fastener Caution
• SIR Warning
• Front Floor Console Replacement
• SIR Inflator Module Handling and Storage Warning
• Steering Wheel Replacement
• Steering Angle Sensor Replacement
• Front Compartment Front Sight Shield Replacement
• Driver or Passenger Seat Removal and Installation
• Driver or Passenger Seat Adjuster Memory Module Replacement
• Headlining Trim Panel Replacement
• High Voltage System Inspection
• Repairs and Inspections Required After a Collision
• SIR Inflator Module Disposal Warning
• SIR Deployed Inflator Modules Are Hot Warning
• SIR Inflatable Module Deployment Outside Vehicle Warning
• Component Connector End Views
• DTC B0012 or B0013
• SIR Disabling and Enabling
• Inflatable Restraint Module Handling and Scrapping
• Airbag Steering Wheel Module Coil Centering
• Special Tools