B0022
DTC B0022
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provide an overview of each diagnostic category.
DTC Descriptors
DTC B0022 01
- Right Front Seat Belt Pretensioner Deployment Loop Short to Battery
DTC B0022 02
- Right Front Seat Belt Pretensioner Deployment Loop Short to Ground
DTC B0022 04
- Right Front Seat Belt Pretensioner Deployment Loop Open Circuit
DTC B0022 0D
- Right Front Seat Belt Pretensioner Deployment Loop Resistance Above Threshold
DTC B0022 0E
- Right Front Seat Belt 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 seat belt pretensioner - RF high and/or low circuit is short to voltage for 120 milliseconds.
B0022 02
The seat belt pretensioner - RF high and/or low circuit is short to ground for 120 milliseconds.
B0022 04
The seat belt pretensioner - RF high and/or low circuit is open for 120 milliseconds.
B0022 0D
The seat belt pretensioner - RF deployment loop resistance is more than 3.9 ohms for 120 milliseconds.
B0022 0E
The seat belt pretensioner - RF 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 via serial data communications.
* The SIR System is disabled and no deployments are allowed.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.
* A history DTC will clear once 255 malfunction-free ignition cycles have occurred.
Special Tools
Each inflatable restraint module requires a specific adapter to connect the load tool to the SIR system.
* J38715-A Driver and Passenger SIR Load Tool
* J-38715-30A SIR Load Tool Adapter
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 J-38715-30A to connect the J38715-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 J-38715-30A and J38715-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 after completing the diagnostic procedure. Verification Tests
* Seat Belt Retractor Pretensioner Replacement - Front (Coupe) Seat Belt Retractor Pretensioner Replacement - Front (Sedan) Seat Belt Retractor Pretensioner Replacement - Front (Convertible)
* SIR/SRS Wiring Repairs