Caution: Refer to SIR Inflator Module Handling and Storage Caution in the Preface section.
Live and Undeployed Inflator Module
Take special care when handling or storing a live and undeployed inflator module.
An inflator module deployment produces a rapid generation of gas. This may cause
the inflator module, or an object in front of the inflator module, to project through
the air in the event of an unlikely deployment.
Dual Stage Inflator Module
Dual stage inflator modules have two deployment stages. If stage 1 was
used to deploy a dual stage inflator module, stage 2 may still be active.
Therefore, a deployed inflator module must still be treated as an active inflator
module. If disposal of a deployed or undeployed dual stage module is required, both
deployment loops must be energized to deploy the inflator module.
Scrapping Procedure
During the course of a vehicle's useful life, certain situations may arise which
will require the disposal of a live (undeployed) inflator module. Do not dispose
a live and undeployed inflator module through normal disposal channels until the
inflator module has been deployed. If scrapping a deployed dual stage inflator module,
both stages must be energized. The following information covers the proper procedures
for the disposing of a live and undeployed inflator module. Do not deploy the inflator
module in the following situations:
• | After replacement of an inflator module under warranty. The inflator module
may need to be returned undeployed to the manufacturer. |
• | If the vehicle is the subject of a product liability report, GM-1241,
related to the SIR or seat belt system. When a vehicle is the subject of a product
liability report, do not alter the SIR or seat belt system in any manner. |
• | If the vehicle is involved in a campaign affecting the inflator modules.
Follow the instructions in the campaign service bulletin for proper SIR handling
procedures. |
Deployment Procedures
The inflator module can be deployed inside or outside of the vehicle. The method
used depends upon the final disposition of the vehicle. Review the following procedures
in order to determine which will work best in a given situation:
Deployment Outside Vehicle - Steering Wheel Module, I/P Module, and Side
Impact Module
Deploy the inflator module outside of the vehicle when the vehicle will be returned
to service. Situations that require deployment outside of the vehicle include the
following:
• | Using the SIR diagnostics, you determine that the inflator module is malfunctioning. |
• | The inflator module is cosmetically damaged, scratched or ripped. |
• | The inflator module pigtail, if equipped, is damaged. |
• | The inflator module connector is damaged. |
• | The inflator module connector terminals are damaged. |
Deployment and disposal of a malfunctioning inflator module is subject to any
required retention period.
Caution: Refer to SIR Inflator Module Disposal Caution in the Preface section.
Tools Required
• | J 38826-75 Steering Wheel Module Adapter |
• | J 38826-80 I/P Module Adapter |
• | An appropriate pigtail adaptor |
- Turn OFF the ignition.
- Remove the ignition key.
- Put on safety glasses.
- Remove the inflator module. Refer to the following:
- Place the inflator module with the vinyl
trim cover facing up and away from the surface on a work bench, floor or deployment
fixture.
- Clear a space on the ground about 1.85 m
(6 ft) in diameter for deployment of the inflator module. 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.
- Make sure no loose or flammable objects are in the area.
Important: Dual stage deployments are only used in the steering wheel and I/P inflator
modules, if the vehicle is equipped. If stage 1 was used to deploy a dual
stage inflator module, stage 2 may still be active. If disposal of a deployed
or undeployed dual stage module is required, both deployment loops must be energized
to deploy the inflator module.
- If you are deploying a steering wheel module, place the steering wheel
module in the center of the space.
- When deploying an I/P module, refer to the
following instructions:
9.1. | Place the J 39401-B
(2)
in the center of the cleared area. |
9.2. | Fill the deployment fixture with water or sand. |
9.3. | Mount the I/P module (1) in the deployment fixture (2) with the vinyl/plastic
trim facing up. |
9.4. | To mount, use 4 M 6 bolts (6), nuts (8), and washers (7) in order
to properly secure the I/P module (1) to the deployment fixture. |
9.5. | Securely tighten all fasteners prior to deployment. |
- When deploying the side impact module -
LF, refer to the following instructions:
10.1. | Place the J 39401-B
(3)
in the center of the cleared area |
10.2. | Fill the deployment fixture with water or sand |
10.3. | Mount the side impact module - LF (1) in the deployment fixture
(3) with the vinyl/plastic trim cover facing up. |
10.4. | Adjust and secure the J 39401-B
arms (4) to the deployment fixture (3). |
10.5. | To mount, use 2 M 6 x 1.0 nuts (2) with washers in order to secure
the side impact module - LF (1) to the deployment fixture arms (4). |
10.6. | Securely tighten all fasteners prior to deployment. |
- Inspect the J 38826
SIR deployment harness (1) and the appropriate pigtail adapter (2)
for damage. Replace as needed.
- Short the two SIR deployment harness (1) leads together using one banana
plug seated into the other.
Important: Refer to the Tools Required list for the correct adapter.
- Connect the appropriate pigtail adapter (2) to the SIR deployment harness (1).
- Extend the SIR deployment harness and adapter
to full length from the deployment fixture.
Important: On a dual stage inflator module, both connectors must be attached to the deployment
harness adapter. This will ensure that both stage 1 and stage 2 of
the deployment loops are energized, regardless of the deployment state.
- Connect the inflator module (1) to the adapter (2) on the SIR deployment harness
(3).
- Place a 12 V minimum/2 A minimum power source, i.e., vehicle
battery, near the shorted end of the harness.
Important:
• | The rapid expansion of gas involved with deploying an inflator module
is very loud. Notify all the people in the immediate area that you intend to deploy
the inflator module. |
• | When the inflator module deploys, the deployment fixture may jump about
30 cm (1 ft) vertically. This is a normal reaction of the inflator
module due to the force of the rapid expansion of gas inside the inflator module. |
• | If you are deploying a dual stage inflator module with stage 1
already deployed, the fixture may not move and the noise may have been reduced. |
- Clear the area of people.
- Separate the 2 banana plugs on the SIR deployment harness.
- Connect the SIR deployment harness wires
to the power source. Inflator module deployment will occur when contact is made.
- Disconnect the SIR deployment harness from
the power source after the inflator module deploys.
Caution: Refer to SIR Deployed Inflator Modules Are Hot Caution in the Preface section.
- If the inflator module did not deploy, disconnect the adapter and discontinue
the procedure. Contact the Technical Assistance Group. Otherwise, proceed to the
following steps.
- Seat one banana plug into the other in order to short the deployment harness
leads.
- Put on a pair of shop gloves.
- Disconnect the pigtail adapter from the inflator module as soon as possible.
- Inspect the pigtail adaptor and the SIR deployment harness. Replace as
needed.
- Dispose of the deployed inflator module through normal refuse channels.
- Wash hands with a mild soap.
Deployment Inside Vehicle - Vehicle Scrapping Procedure
Deploy the inflator modules inside of the vehicle when destroying the vehicle
or when salvaging the vehicle for parts. This includes but is not limited to the
following situations:
• | The vehicle has completed its useful life. |
• | Irreparable damage occurs to the vehicle in a non-deployment type accident. |
• | Irreparable damage occurs to the vehicle during a theft. |
• | The vehicle is being salvaged for parts to be used on a vehicle with a
different VIN as opposed to rebuilding as the same VIN. |
Caution: When deploying a SIR component for disposal, perform the deployment procedures
in the order listed. Failure to observe the procedures in the order listed may result
in personal injury.
- Turn OFF the ignition.
- Remove the ignition key.
- Put on safety glasses.
- Remove all loose objects from the front seats.
- Disconnect the inflatable restraint steering wheel module coil connector,
located at the LH side of the I/P.
Important: If the vehicle is equipped with dual stage air bags, the steering wheel module
and the I/P module will each have 4 wires. Refer to
SIR Connector End Views
for determining the high and low circuits.
- Cut the yellow harness connector from the vehicle, leaving at least 16 cm
(6 in) of wire at the connector.
- Strip 13 mm (0.5 in) of insulation from all 4 SIR wires
connector leads.
- Cut two 4.6 m (15 ft) deployment
wires from a 0.8 mm (18 gage) or thicker multi-strand wire. These wires
will be used for the steering wheel module deployment harness.
- Strip 13 mm (0.5 in) of insulation from both ends of the
wires cut in the previous step.
- Twist together 1 end from each of the wires in order to short the wires.
Deployment wires shall remain shorted, and not connected to a power source until
you are ready to deploy the inflator module.
- Twist together 2 connector wire leads, the
high circuits from both stages of the steering wheel module, to one of the deployment
harness wires. Refer to
SIR Connector End Views
in order to determine the correct circuits.
- Inspect that the 3 wire connection is secure.
- Bend flat the twisted connection.
- Secure and insulate the 3 wire connection
to the deployment harness using electrical tape.
- Twist together 2 connector wire leads, the
low circuits from both stages of the steering wheel module, to the deployment harness
wire. Refer to
SIR Connector End Views
in
order to determine the correct circuits.
- Inspect that the 3 wire connection is secure.
- Bend flat the twisted connection.
- Secure and insulate the 3 wire connection
to the deployment harness using electrical tape.
- Connect the deployment harness to the steering
wheel module connector.
- Route the deployment harness out of the
driver side of the vehicle.
- Disconnect the inflatable restraint side
impact module - LF connector (1), located under the driver seat.
- Cut the side impact module - LF connector
out of the vehicle, leaving at least 16 cm (6 in) of wire at the connector.
- Strip 13 mm (0.5 in) of insulation from each of the connector
wire leads.
- Cut two 4.6 m (15 ft) deployment
wires from a 0.8 mm (18 gage) or thicker multi-strand wire. These wires
will be used for the side impact module - LF deployment harness.
- Strip 13 mm (0.5 in) of insulation from both ends of these
wires.
- Twist together 1 end from each of the wires in order to short the wires.
Deployment wires shall remain shorted, and not connected to a power source until
you are ready to deploy the inflator module.
- Twist together 1 connector wire lead to
1 deployment wire.
- Inspect that the previous connection is secure.
- Bend flat the twisted connection.
- Secure and insulate the connection using electrical tape.
- Twist together, bend, and tape the remaining
connector wire lead to the remaining deployment wire.
- Connect the deployment harness to the side
impact module - LF connector (1).
- Route the deployment harness out of the
driver side of the vehicle.
- Disconnect the inflatable restraint I/P
module connector, located at the RH side of the instrument panel.
Important: If the vehicle is equipped with dual stage air bags, the steering wheel module
and the I/P module will each have 4 wires. Refer to
SIR Connector End Views
for determining the high and low circuits.
- Cut the 4 SIR wires leading to the connector from the vehicle, leaving at least
16 cm (6 in) of wire at the connector.
- Strip 13 mm (0.5 in) of insulation from all 4 SIR wires
connector leads.
- Cut two 4.6 m (15 ft) deployment
wires from a 0.8 mm (18 gage) or thicker multi-strand wire. These wires
will be used for the I/P module deployment harness.
- Strip 13 mm (0.5 in) of insulation from both ends of the
wires cut in the previous step.
- Twist together 1 end from each of the wires in order to short the wires.
Deployment wires shall remain shorted, and not connected to a power source until
you are ready to deploy the inflator module.
- Twist together 2 connector wire leads, the
high circuits from both stages of the I/P module, to one of the deployment harness
wires. Refer to
SIR Connector End Views
in
order to determine the correct circuits.
- Inspect that the 3 wire connection is secure.
- Bend flat the twisted connection.
- Secure and insulate the 3 wire connection
to the deployment harness using electrical tape.
- Twist together 2 connector wire leads, the
low circuits from both stages of the I/P module, to the deployment harness wire.
Refer to
SIR Connector End Views
in order
to determine the correct circuits.
- Inspect that the 3 wire connection is secure.
- Bend flat the twisted connection.
- Secure and insulate the 3 wire connection
to the deployment harness using electrical tape.
- Connect the deployment harness to the I/P
module connector.
- Route the deployment harness out of the
passenger side of the vehicle.
- Completely cover the windshield and the front door openings with a drop
cloth.
- Stretch out all of the deployment harness wires on the left and right
side of the vehicle to their full length.
- Deploy each deployment loop one at a time.
- Place a power source, 12 V minimum/2 A minimum, i.e., a
vehicle battery, near the shorted end of the harnesses.
- Separate one set of wires and touch the wire ends to the power source
in order to deploy the inflator modules, doing only one inflator module at a time.
- Disconnect the deployment harness from the power source and twist the
wire ends together.
- Continue the same process with the remaining deployment harnesses that
are available.
- Remove the drop cloth from the vehicle.
- Disconnect all harnesses from the vehicle.
- Discard the harnesses.
- Scrap the vehicle in the same manner as a non-SIR equipped vehicle.
- If one or more of the inflator modules did not deploy, perform the following
steps to remove the undeployed modules from the vehicle:
- Call the Technical Assistance Group for further assistance.