GM Service Manual Online
For 1990-2009 cars only

Diagnostic Instructions

    • Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
    • 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

Short to Ground

High Resistance

Open

Short to Voltage

Signal Performance

Seat Belt Pretensioner - RF High Circuit

B0022 02

B0022 0D

B0022 04

B0022 01

B0022 0E

Seat Belt Pretensioner - RF Low Circuit

B0022 02

B0022 0D

B0022 04

B0022 01

B0022 0E

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.

Reference Information

Schematic Reference

SIR Schematics

Connector End View Reference

SIR Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs
    •  SIR/SRS Wiring Repairs

Special Tools Required

    • J 38715-A SIR Driver/Passenger 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 seat belt retractor pretensioner - RF
       • The SDM module
       • The seat belt retractor pretensioner - RF wiring harness connector
       • The SDM wiring harness connector

  1. Ignition OFF, remove the garnish molding - center pillar lower and disconnect the seat belt retractor pretensioner - RF connector. Refer to Body Lock Pillar Garnish Lower Molding Replacement .
  2. Use the J 38715-30A to connect the J 38715-A SIR Driver/Passenger Load Tool 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.
  4. If DTC B0022 is history replace the seat belt retractor pretensioner - RF.
  5. With the ignition OFF, disconnect and remove both the J 38715-A and adapter, then remove the SDM connector.
  6. Test the high and low circuits between the SDM and seat belt retractor pretensioner - RF for a short to voltage, short to ground, or open/low resistance. Verify that a short to voltage, short to ground, or open/low resistance does not exist.
  7. If any of the above conditions are found make the appropriate repair.
  8. If all circuits test normal then replace the SDM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Seat Belt Retractor Pretensioner Replacement - Front
    •  Control Module References for SDM replacement, setup, and programming