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B0015




DTC B0014-B0045

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (with HP2) (Initial Inspection and Diagnostic Overview)Diagnostic System Check - Vehicle (without HP2) (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptors
DTC B0015 01
- Driver Pretensioner Deployment Loop Short to Battery

DTC B0015 02
- Driver Pretensioner Deployment Loop Short to Ground

DTC B0015 04
- Driver Pretensioner Deployment Loop Open Circuit

DTC B0015 0D
- Driver Pretensioner Deployment Loop Resistance Above Threshold

DTC B0015 0E
- Driver Pretensioner Deployment Loop Resistance Below Threshold

DTC B0016 01
- Left Roof Rail Initiator 1 Deployment Loop Short to Battery

DTC B0016 02
- Left Roof Rail Initiator 1 Deployment Loop Short to Ground

DTC B0016 04
- Left Roof Rail Initiator 1 Deployment Loop Open Circuit

DTC B0016 0D
- Left Roof Rail Initiator 1 Deployment Loop Resistance Above Threshold

DTC B0016 0E
- Left Roof Rail Initiator 1 Deployment Loop Resistance Below Threshold

DTC B0019 01
- Passenger Frontal Deployment Loop Stage 1 Short to Battery

DTC B0019 02
- Passenger Frontal Deployment Loop Stage 1 Short to Ground

DTC B0019 04
- Passenger Frontal Deployment Loop Stage 1 Open Circuit

DTC B0019 0D
- Passenger Frontal Deployment Loop Stage 1 Resistance Above Threshold

DTC B0019 0E
- Passenger Frontal Deployment Loop Stage 1 Resistance Below Threshold

DTC B0020 01
- Passenger Frontal Deployment Loop Stage 2 Short to Battery

DTC B0020 02
- Passenger Frontal Deployment Loop Stage 2 Short to Ground

DTC B0020 04
- Passenger Frontal Deployment Loop Stage 2 Open Circuit

DTC B0020 0D
- Passenger Frontal Deployment Loop Stage 2 Resistance Above Threshold

DTC B0020 0E
- Passenger Frontal Deployment Loop Stage 2 Resistance Below Threshold

DTC B0022 01
- Passenger Pretensioner Deployment Loop Short to Battery

DTC B0022 02
- Passenger Pretensioner Deployment Loop Short to Ground

DTC B0022 04
- Passenger Pretensioner Deployment Loop Open Circuit

DTC B0022 0D
- Passenger Pretensioner Deployment Loop Resistance Above Threshold

DTC B0022 0E
- Passenger Pretensioner Deployment Loop Resistance Below Threshold

DTC B0023 01
- Right Roof Rail Initiator 1 Deployment Loop Short to Battery

DTC B0023 02
- Right Roof Rail Initiator 1 Deployment Loop Short to Ground

DTC B0023 04
- Right Roof Rail Initiator 1 Deployment Loop Open Circuit

DTC B0023 0D
- Right Roof Rail Initiator 1 Deployment Loop Resistance Above Threshold

DTC B0023 0E
- Right Roof Rail Initiator 1 Deployment Loop Resistance Below Threshold

DTC B0033 01
- Third Row Left Roof Rail Deployment Loop Short to Battery

DTC B0033 02
- Third Row Left Roof Rail Deployment Loop Short to Ground

DTC B0033 04
- Third Row Left Roof Rail Deployment Loop Open Circuit

DTC B0033 0D
- Third Row Left Roof Rail Deployment Loop Resistance Above Threshold

DTC B0033 0E
- Third Row Left Roof Rail Deployment Loop Resistance Below Threshold

DTC B0040 01
- Third Row Right Roof Rail Deployment Loop Short to Battery

DTC B0040 02
- Third Row Right Roof Rail Deployment Loop Short to Ground

DTC B0040 04
- Third Row Right Roof Rail Deployment Loop Open Circuit

DTC B0040 0D
- Third Row Right Roof Rail Deployment Loop Resistance Above Threshold

DTC B0040 0E
- Third Row Right Roof Rail Deployment Loop Resistance Below Threshold

Diagnostic Fault Information





Circuit/System Description

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

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0015 01, B0016 01, B0019 01, B0020 01, B0022 01, B0023 01, B0033 01, B0040 01

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

B0015 02, B0016 02, B0019 02, B0020 02, B0022 02, B0023 02, B0033 02, B0040 02

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

B0015 04, B0016 04, B0019 04, B0020 04, B0022 04, B0023 04, B0033 04, B0040 04

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

B0015 0D, B0016 0D, B0019 0D, B0020 0D, B0022 0D, B0023 0D, B0033 0D, B0040 0D

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

B0015 0E, B0016 0E, B0019 0E, B0020 0E, B0022 0E, B0023 0E, B0033 0E, B0040 0E

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

Action Taken When the DTC Sets

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

Conditions for Clearing the DTC

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

Diagnostic Aids

* When a harness connector is disconnected, the high control and low control circuits are shorted together by the integral shorting bar. This should be taken into account when testing for faults on these circuits.
* This DTC usually indicates a poor connection or a wiring malfunction between the SDM and the deployment loop.

Reference Information
Schematic Reference

SIR Schematics (Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

SIR System Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information
Special Tools Required

J 38715-A Driver and Passenger SIR Load Tool

Circuit/System Testing

Important: When removing connectors inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:


* Pretensioner

* Air bag module

* SDM module

* Air bag wiring harness connector

* SDM wiring harness connector


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


1. Verify that the appropriate inflator restraint module connector and CPA are engaged.

• If the above condition is not found, make the appropriate repair.

2. Ignition OFF, disconnect the harness connector at the appropriate inflatable restraint module.
3. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the inflator restraint module.
4. Ignition ON, with a scan tool, verify the appropriate DTC is set as current.

• If the DTC is not set or is set as history, cycle ignition OFF, disconnect the adapter and J 38715-A , reconnect the harness connector at the inflator restraint module, and cycle the ignition ON. If the DTC resets after reconnecting the module, replace the inflator restraint module.

5. Ignition OFF, disconnect special tool J 38715-A and the adaptor.
6. Disconnect the harness connector at the SDM.
7. Ignition ON, test for less than 1 volt between the appropriate high control circuit terminal and ground.

* I/P Module -Stage 1 terminal A1
* I/P Module -Stage 2 terminal B1
* Left Front Roof Rail Module terminal B
* Right Front Roof Rail Module terminal B
* Left Rear Roof Rail Module terminal 2
* Right Rear Roof Rail Module terminal 2
* Seat Belt Pretensioner -Left terminal B
* Seat Belt Pretensioner -Right terminal B

• If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the SDM.

8. Test for less than 1 volt between the appropriate low control circuit terminal and ground.

* I/P Module -Stage 1 terminal A2
* I/P Module -Stage 2 terminal B2
* Left Front Roof Rail Module terminal A
* Right Front Roof Rail Module terminal A
* Left Rear Roof Rail Module terminal 1
* Right Rear Roof Rail Module terminal 1
* Seat Belt Pretensioner -Left terminal A
* Seat Belt Pretensioner -Right terminal A

• If greater than the specified range, test the circuit for a short to voltage. If the circuit tests normal, replace the SDM.

9. Ignition OFF, test for infinite resistance between the appropriate high control circuit terminal and ground.

* I/P Module -Stage 1 terminal A1
* I/P Module -Stage 2 terminal B1
* Left Front Roof Rail Module terminal B
* Right Front Roof Rail Module terminal B
* Left Rear Roof Rail Module terminal 2
* Right Rear Roof Rail Module terminal 2
* Seat Belt Pretensioner -Left terminal B
* Seat Belt Pretensioner -Right terminal B

• If less than the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the SDM.

10. Test for infinite resistance between the appropriate low control circuit terminal and ground.

* I/P Module -Stage 1 terminal A2
* I/P Module -Stage 2 terminal B2
* Left Front Roof Rail Module terminal A
* Right Front Roof Rail Module terminal A
* Left Rear Roof Rail Module terminal 1
* Right Rear Roof Rail Module terminal 1
* Seat Belt Pretensioner -Left terminal A
* Seat Belt Pretensioner -Right terminal A

• If less than the specified value, test the circuit for a short to ground. If the circuit tests normal, replace the SDM.

11. Test for less then 1 ohm between the following high control circuit terminals.

* I/P Module -Stage 1 terminal A1 and SDM terminal 10
* I/P Module -Stage 2 terminal B1 and SDM terminal 6
* Left Front Roof Rail Module terminal B and SDM terminal 13
* Right Front Roof Rail Module terminal B and SDM terminal 14
* Left Rear Roof Rail Module terminal 2 and SDM terminal 21
* Right Rear Roof Rail Module terminal 2 and SDM terminal 22
* Seat Belt Pretensioner -Left terminal B and SDM terminal 17
* Seat Belt Pretensioner -Right terminal B and SDM terminal 18

• If greater than the specified range, test the circuit for an open/high resistance.

12. Test for less then 1 ohm between the following low control circuit terminals.

* I/P Module -Stage 1 terminal A2 and SDM terminal 11
* I/P Module -Stage 2 terminal B2 and SDM terminal 7
* Left Front Roof Rail Module terminal A and SDM terminal 12
* Right Front Roof Rail Module terminal A and SDM terminal 15
* Left Rear Roof Rail Module terminal 1 and SDM terminal 20
* Right Rear Roof Rail Module terminal 1 and SDM terminal 23
* Seat Belt Pretensioner -Left terminal A and SDM terminal 16
* Seat Belt Pretensioner -Right terminal A and SDM terminal 19

• If greater than the specified range, test the circuit for an open/high resistance.

13. If all circuits test normal, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* SIR/SRS Wiring Repairs (Component Tests and General Diagnostics)
* Instrument Panel Inflatable Restraint Module Replacement (Service and Repair)
* Steering Wheel Inflatable Restraint Module Replacement (Service and Repair)
* Steering Wheel Inflatable Restraint Module Coil Replacement (Removal and Replacement)
* Inflatable Restraint Side Impact Sensor Replacement (Rear Side Door) (Inflatable Restraint Side Impact Sensor Replacement (Rear Side Door))Inflatable Restraint Side Impact Sensor Replacement (Front Side Door) (Inflatable Restraint Side Impact Sensor Replacement (Front Side Door))
* Roof Side Rail Inflatable Restraint Module Replacement (Front Right, Extended Wheelbase) (Service and Repair)Roof Side Rail Inflatable Restraint Module Replacement (Rear Left, Standard Wheelbase) (Service and Repair)Roof Side Rail Inflatable Restraint Module Replacement (Rear Right, Standard Wheelbase) (Service and Repair)Roof Side Rail Inflatable Restraint Module Replacement (Front Left, Standard Wheelbase) (Service and Repair)Roof Side Rail Inflatable Restraint Module Replacement (Front Left, Extended Wheelbase) (Service and Repair)Roof Side Rail Inflatable Restraint Module Replacement (Rear Left, Extended Wheelbase) (Service and Repair)Roof Side Rail Inflatable Restraint Module Replacement (Rear Right, Avalanche/Escalade EXT) (Service and Repair)Roof Side Rail Inflatable Restraint Module Replacement (Rear Right, Extended Wheelbase) (Service and Repair)Roof Side Rail Inflatable Restraint Module Replacement (Front Right, Standard Wheelbase) (Service and Repair)Roof Side Rail Inflatable Restraint Module Replacement (Rear Left, Avalanche/Escalade EXT) (Service and Repair)
* Seat Belt Retractor Pretensioner Replacement - Front (Removal and Replacement)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming

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