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B0022



DTC B0022

Diagnostic Instructions

- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure, Diagnostic System Check - Vehicle
- Review Strategy Based Diagnosis for an overview of the diagnostic approach, Strategy Based Diagnosis
- Diagnostic Procedure Instructions provide an overview of each diagnostic category, Diagnostic Procedure Instructions

DTC Descriptors

DTC B0022 01: Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Battery
DTC B0022 02: Passenger Seat Belt Retractor Pretensioner Deployment Loop Short to Ground
DTC B0022 04: Passenger Seat Belt Retractor Pretensioner Deployment Loop Open Circuit
DTC B0022 0D: Passenger Seat Belt Retractor Pretensioner Deployment Loop Resistance Above Threshold
DTC B0022 0E: Passenger Seat Belt Retractor Pretensioner 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 passenger seat belt retractor pretensioner. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. A shorting bar (if equipped) is located in the connector.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0022 01
The passenger seat belt retractor pretensioner high and/or low circuit is short to voltage for 120 milliseconds.

B0022 02
The passenger seat belt retractor pretensioner high and/or low circuit is short to ground for 120 milliseconds.

B0022 04
The passenger seat belt retractor pretensioner high and/or low circuit is open for 120 milliseconds.

B0022 0D
The passenger seat belt retractor pretensioner deployment loop resistance is more than 3.9 ohms for 120 milliseconds.

B0022?0E
The passenger seat belt retractor pretensioner 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 SIR system 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 malfunction-free ignition cycles have occurred.

Reference Information

Schematic Reference

SIR Schematics, [1][2]Air Bag Systems

Description and Operation

SIR System Description and Operation, Description and Operation

Electrical Information Reference

- Circuit Testing, Circuit Testing
- Connector Repairs, Connector Repairs
- Testing for Intermittent Conditions and Poor Connections, Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs, Wiring Repairs

Scan Tool Reference

Control Module References for scan tool information, Control Module References

Special Tools

Each inflatable restraint module requires a specific adapter to connect the load tool to the SIR system.
- J 38715-A Driver and Passenger SIR Load Tool
- J-38715-30A SIR Load Tool Adapter

Circuit/System Testing

Important: Refer to SIR Service Precautions, Technician Safety Information

When removing the connectors, inspect for damage or corrosion. Damage or corrosion to the following requires repair or replacement of the affected component/connector:
- Passenger seat belt retractor pretensioner
- SDM
- Passenger seat belt retractor pretensioner wiring harness connector
- SDM wiring harness connector

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

1. Verify that the passenger seat belt retractor pretensioner connector and CPA are engaged.
-> If the above condition is not found, make the appropriate repair.
2. Ignition OFF, disconnect the harness connector at the passenger seat belt retractor pretensioner.
3. With the appropriate load tool adapter, connect J 38715-A in place of the passenger seat belt retractor pretensioner.
4. Ignition ON, with a scan tool, verify that DTC B0022 is set as current.
-> If the DTC is not set or is set as history, cycle the ignition OFF, disconnect the load tool and adapter, reconnect the harness connector at the passenger seat belt retractor pretensioner, and cycle the ignition ON. If the DTC resets after reconnecting the pretensioner, replace the passenger seat belt retractor pretensioner.
5. Ignition OFF, disconnect the load tool and the adapter.
6. Disconnect the harness connector at the SDM.
7. Ignition ON, test for less than 1.0?volt between the low control circuit terminal 57 and ground.
-> If not within the specified range, test the control circuit for a short to voltage.
8. Ignition ON, test for less than 1.0?volt between the high control circuit terminal 56 and ground.
-> If not within the specified range, test the control circuit for a short to voltage.
9. Ignition OFF, test for infinite resistance between the low control circuit terminal 57 and ground.
-> If not within the specified range, test the control circuit for a short to ground.
10. Ignition OFF, test for infinite resistance between the high control circuit terminal 56 and ground.
-> If not within the specified range, test the control circuit for a short to ground.
11. Test for less than 1.0?ohm between the low control circuit terminal 1 and the SDM terminal 57.
-> If not within the specified range, test the control circuit for an open/high resistance.
12. Test for less than 1.0?ohm between the high control circuit terminal 2 and the SDM terminal 56.
-> If not within the specified range, test the control circuit for an open/high resistance.
13. If all circuits test normal, replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure, Verification Tests
- Seat Belt Retractor Pretensioner Replacement - Front, Removal and Replacement
- SIR/SRS Wiring Repairs, SIR/SRS Wiring Repairs
- Control Module References for SDM replacement, setup, and programming, Control Module References
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