B0022
DTC B0014-B0045
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 provides and overview of each diagnostic category.
DTC Descriptors
B0022 01
- Passenger Pretensioner Deployment Loop Short to Battery
B0022 02
- Passenger Pretensioner Deployment Loop Short to Ground
B0022 04
- Passenger Pretensioner Deployment Loop Open Circuit
B0022 0D
- Passenger Pretensioner Deployment Loop Resistance Above Threshold
B0022 0E
- Passenger Pretensioner Deployment Loop Resistance Below Threshold
Diagnostic Fault Information
Circuit/System Description
If a malfunction is detected, a DTC will be stored in non-volatile memory. 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. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity, shorts to ground, and shorts voltage. 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 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
B0015 01, B0019 01 Stage 1, B0020 01 Stage 2, B0022 01
The air bag module high and/or low circuit is short to voltage for 120 milliseconds.
B0015 02, B0019 02 Stage 1, B0020 02 Stage 2, B0022 02
The air bag module high and/or low circuit is short to ground for 120 milliseconds.
B0015 04, B0019 04 Stage 1, B0020 04 Stage 2, B0022 04
The air bag module high and/or low circuit is open for 120 milliseconds.
B0015 0D, B0019 0D Stage 1, B0020 0D Stage 2, B0022 0D
The air bag module deployment loop resistance is more than 3.9 ohms for 120 milliseconds.
B0015 0E, B0019 0E Stage 1, B0020 0E Stage 2, B0022 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 commands the AIR BAG indicator ON via serial data communications.
* The SDM will store a DTC, if event occurs system will still attempt deployments.
Conditions for Clearing the DTC
* The condition responsible for setting the DTC no longer exists.
* A history DTC will clear once 100 malfunction-free ignition cycles have occurred.
Diagnostic Aids
Each air bag module requires a specific adapter to connect the load tool to the SIR system. For specific tool information refer to Special Tools.
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 pretensioner
* The air bag module
* The SDM module
* The air bag wiring harness connector
* The SDM wiring harness connector
1. Ignition OFF, disconnect the harness connector at the applicable air bag module.
2. With the applicable adaptor, connect special tool J38715-A.
3. Ignition ON, with a scan tool, verify DTC is set as current.
• If DTC is not set or is set as history, replace the applicable air bag module.
4. Ignition OFF, disconnect special tool J38715-A and the applicable adaptor.
5. Ignition ON, test for less than 1 volt between the applicable HI circuit and ground.
• If not the specified range, test the circuit for a short to voltage.
6. Test for less than 1 volt between the applicable LOW circuit and ground.
• If not the specified range, test the circuit for a short to voltage.
7. Ignition OFF, test for infinite resistance between the applicable HI circuit and ground.
• If not the specified range, test the circuit for a short to ground.
8. Test for infinite resistance between the applicable LOW circuit and ground.
• If not the specified range, test the circuit for a short to ground.
9. Disconnect the harness connector at the SDM.
10. Test for less then 1 ohm of resistance between the SDM connector and the air bag module connector HI circuit.
• If not the specified range, test the circuit for an open/high resistance.
11. Test for less then 1 ohm of resistance between the SDM connector and the air bag module connector LOW circuit.
• If not 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
* Inflatable Restraint Instrument Panel Module Replacement
* Seat Belt Retractor Pretensioner Replacement - Front
* Control Module References for SDM replacement, setup, and programming