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Deployment Outside Vehicle for Seat Belt Pretensioners

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Deploy the seat belt pretensioners outside of the vehicle when the vehicle will be returned to service. Situations that require deployment outside of the vehicle include the following:

Deployment and disposal of a malfunctioning seat belt pretensioner is subject to any required retention period.

CAUTION: In order to prevent accidental deployment and the risk of personal injury, do not dispose of an undeployed inflatable restraint seat belt pretensioner as normal shop waste. Undeployed seat belt pretensioners contain substances that could cause severe illness or personal injury if their sealed containers are damaged during disposal. Use the following deployment procedures to safely dispose of an undeployed seat belt pretensioner. Failure to observe the following disposal methods may be a violation of federal, state, or local laws.

Tools Required

    Fig 1: Proper Transportation of Seat Belt Pretensioner
    GM1225155Courtesy of GENERAL MOTORS CORP.
  1. Turn OFF the ignition.
  2. Remove the ignition key.
  3. Put on safety glasses.
  4. Remove the seat belt pretensioner from the vehicle. Refer to Seat Belt Retractor Pretensioner Replacement - Front .
  5. When carrying a seat belt pretensioner to the deployment area, keep fingers clear of the seat belt webbing.
    6. Fig 2: Illustrating Proper Space For Deployment Of Pretensioner
    GM1225166Courtesy of GENERAL MOTORS CORP.
  6. Clear a space on the ground about 1.85 m (6 ft) in diameter for deployment of the seat belt pretensioner. If possible, use a paved, outdoor location free of activity. Otherwise, use a space free of activity on the shop floor. Make sure you have sufficient ventilation.
  7. Make sure no loose or flammable objects are in the area.
  8. Place the J 39401-B  in the center of the cleared area. See Special Tools .
  9. Fill the fixture plastic reservoir with water or sand.
    10. Fig 3: Seat Belt Pretensioner & SIR Deployment Fixture
    GM1225176Courtesy of GENERAL MOTORS CORP.
  10. Mount the seat belt pretensioner (1) in the SIR deployment fixture (3) with the open end facing up using the following mounting method.
    • Adjust and secure the J 39401-B  arms (4) to the deployment fixture. See Special Tools .
    • To mount, use the proper size bolt (2) and nut (5) with washers in order to secure the seat belt pretensioner (1) to the deployment fixture brackets.
    • Securely tighten all fasteners prior to deployment.
    11. Fig 4: Identifying SIR Deployment Harness & Adapter
    GM68645Courtesy of GENERAL MOTORS CORP.
  11. Inspect the J 38826  and the appropriate pigtail adapter for damage. See Special Tools . Replace as needed.
  12. Short the 2 SIR deployment harness (1) leads together using 1 banana plug seated into the other.
  13. Connect the appropriate pigtail adapter (2) to the SIR deployment harness.
    14. Fig 5: Identifying Seat Belt Pretensioner Connector, Adapter & Deployment Harness
    GM1225179Courtesy of GENERAL MOTORS CORP.
  14. Extend the SIR deployment harness and adapter to full length from the deployment fixture.
  15. Connect the seat belt pretensioner connector (1) to the adapter (2) on the deployment harness (3).
    16. IMPORTANT: When deploying a seat belt pretensioner, the rapid expansion of gas is very loud. Notify the people in the immediate area that a seat belt pretensioner will be deployed.
  16. Clear the area of people.
    17. Fig 6: View Of Banana Plugs
    GM39382Courtesy of GENERAL MOTORS CORP.
  17. Separate the 2 banana plugs on the SIR deployment harness.
    18. Fig 7: Deploying Seat Belt Pretensioner
    GM1225186Courtesy of GENERAL MOTORS CORP.
  18. Place a 12 volt minimum/2 amp minimum power source, such as a vehicle battery, near the shorted end of the harness.
  19. Connect the SIR deployment harness wires to the power source. Seat belt pretensioner deployment will occur when contact is made.
  20. Disconnect the SIR deployment harness from the power source after the seat belt pretensioner deploys.
    21. Fig 8: View Of Deployment Harness Leads
    GM9581Courtesy of GENERAL MOTORS CORP.
  21. Seat one banana plug into the other in order to short the deployment harness leads.
  22. If the seat pretensioner did not deploy, disconnect the adapter and discontinue the procedure. Contact the Technical Assistance Group. Otherwise, proceed to the following steps.
  23. Put on a pair of shop gloves.
  24. Disconnect the pigtail adapter from the seat belt pretensioner as soon as possible.
  25. Dispose of the deployed seat belt pretensioner through normal refuse channels.
  26. Wash hands with a mild soap.
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