B0022
DTC B0022
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (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 B0022 01
- Pretensioner Deployment Loop Short to Battery
DTC B0022 02
- RF Pretensioner Deployment Loop Short to Ground
DTC B0022 04
- RF Pretensioner Deployment Loop Open Circuit
DTC B0022 0D
- RF Pretensioner Deployment Loop Resistance Above Threshold
DTC B0022 0E
- RF 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 seat belt pretensioner - RF. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage.
A shorting bar used within the seat belt pretensioner - RF connector which will short together both seat belt pretensioner - RF high and low circuits when the connector is disconnected, this will help to prevent unwanted deployment of the inflator module during servicing.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Conditions for Setting the DTC
B0022 01
The RF seat belt pretensioner high and/or low circuit is short to voltage for 120 milliseconds.
B0022 02
The RF seat belt pretensioner high and/or low circuit is short to ground for 120 milliseconds.
B0022 04
The RF seat belt pretensioner high and/or low circuit is open for 120 milliseconds.
B0022 0D
The RF seat belt pretensioner deployment loop resistance is more than 3.9 ohms for 120 milliseconds.
B0022 0E
The RF seat belt pretensioner deployment loop resistance is less than 1.1 ohms for 120 milliseconds.
Action Taken When the DTC Sets
* The SDM commands the AIR BAG indicator ON.
* The SDM will store a DTC, however if an event occurs system will still attempt deployments.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will be a history DTC.
* A history DTC will clear after 50 ignition cycles.
Reference Information
Schematic Reference
SIR Schematics ([1][2]Air Bag Systems)
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
J 38715-A Driver and Passenger SIR Load Tool
Circuit/System Testing
Important: When removing connectors inspect for damage or corrosion. Damage or corrosion in the following requires repair or replacement of the affected component/connector.
* The RF seat belt retractor pretensioner
* The SDM module
* The RF seat belt retractor pretensioner wiring harness connector
* The SDM wiring harness connector
1. Ignition OFF, disconnect the harness connector at the RF inflatable restraint seat belt pretensioner.
2. Use the appropriate load tool adapter to connect the J 38715-A to the harness side of the RF inflatable restraint seat belt pretensioner connector. Use the PASSENGER INFLATOR connector located on the load tool
3. Ignition ON, with a scan tool, verify the appropriate DTC is set as current.
• If DTC is not set or is set as history, replace the RF inflatable restraint seat belt pretensioner.
4. Ignition OFF, disconnect the appropriate load tool adapter and J 38715-A.
5. Disconnect the harness connector at the SDM.
6. Ignition ON, test for less than 1-volt between the high control circuit terminal 2 and ground.
• If not within the specified range, test the circuit for a short to voltage.
7. Test for less than 1-volt between the low control circuit terminal 1 and ground.
• If not within the specified range, test the circuit for a short to voltage.
8. Ignition OFF, test for infinite resistance between the high control circuit terminal 2 and ground.
• If not within the specified range, test the circuit for a short to ground.
9. Test for infinite resistance between the applicable low control circuit terminal 1 and ground.
• If not within the specified range, test the circuit for a short to ground.
10. Test for less then 1 ohm between the RF inflatable restraint seat belt pretensioner terminal 1 and SDM terminal 57.
• If not within the specified range, test the circuit for an open/high resistance.
11. Test for less then 1 ohm between the RF inflatable restraint seat belt pretensioner terminal 2 and SDM terminal 56.
• If not within the specified range, test the circuit for an open/high resistance.
12. If all circuits test normal, replace the SDM.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Seat Belt Retractor Pretensioner Replacement - Front (Removal and Replacement)
* SIR/SRS Wiring Repairs (Component Tests and General Diagnostics)
* Control Module References (Programming and Relearning) for SDM replacement, setup, and programming