B0022
DTC B0022
Circuit Description
The passenger seat belt pretensioner loop consists of the following components:
* A inflatable restraint seat belt pretensioner
* The seat belt pretensioner-RF high circuit
* The seat belt pretensioner-RF low circuit
A shorting bar used within the seat belt pretensioner connector which will short together both seat belt pretensioner high and low circuits when the connector is disconnected, this will help to prevent unwanted deployment of the pretensioner during servicing. During a 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. The SDM performs continuous diagnostic tests on the deployment loops to check for proper circuit continuity and for shorts to ground or voltage. If a malfunction is detected, a diagnostic trouble code (DTC) will be stored in memory.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B0022 Right Front Seat Belt Pretensioner Deployment Loop
This vehicle has DTCs which include DTC Symptoms. For more information on DTC Symptoms, refer to DTC Symptom Description. DTC Symptom Description
Conditions for Running the DTC
Ignition voltage is within the normal operating voltage range.
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 GMLAN serial data.
Conditions for Clearing the MIL/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.
Diagnostic Aids
The following are possible causes of the malfunction:
* A short between the seat belt pretensioner-RF high and low circuits
* An open or a high resistance in the seat belt pretensioner-RF high or low circuits
* A short to ground or a short to voltage in the seat belt pretensioner-RF high or low circuits
* The seat belt pretensioner-RF connector
* The SDM connector
* A malfunctioning seat belt pretensioner
* A malfunctioning SDM
Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction. If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics
Test Description
Step 1 - Step 8:
Step 9:
The numbers below refer to the step numbers on the diagnostic table.
4. This step tests to see if the malfunction is caused by the seat belt pretensioner-RF.
6. This step tests to see what DTCs are present. If DTC B0022 01 is present, test the seat belt pretensioner-RF for a short to battery voltage on the high and low circuits. If DTC B0022 02 is present, test the seat belt pretensioner-RF high and low circuits for a short to ground. If DTC B0022 04, 0D, 0E is present, test the seat belt pretensioner-RF high and low circuits for an open circuit and for high or low resistance.