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 provides 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

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.

Circuit/System Testing

1. 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 seat belt retractor pretensioner - RF

* The SDM module

* The seat belt retractor pretensioner - RF wiring harness connector

* The SDM wiring harness connector

Ignition OFF, disconnect the seat belt retractor pretensioner - RF connector.

2. Connect the J 38715-A to the harness side of the seat belt retractor pretensioner - RF wiring harness connector. Use the PASSENGER INFLATOR connector located on the load tool.
3. Ignition ON, use a scan tool to observe the SIR DTC display. Verify DTC B0022 is set current.

• If DTC B0022 is history replace the seat belt retractor pretensioner - RF.

4. Ignition OFF, disconnect and remove the J 38715-A. Then remove the SDM connector, refer to SDM replacement in Repair Instructions for connector location.
5. Test the high and low circuits between the SDM and seat belt retractor pretensioner - RF for a short to voltage, short to ground, an open, or low resistance. Verify that a short to voltage, short to ground, or open/low resistance does not exist.

• If any of the above conditions are found make the appropriate repair.

6. If all circuits test normal then replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

* Seat Belt Retractor Pretensioner Replacement - Front (Impala) Seat Belt Retractor Pretensioner Replacement - Front (Monte Carlo)
* Programming and Relearning Programming and Relearning