Chevrolet 2013 Impala Police Package Manual de Serviço descarregar pdf (Página 37)

26 | aIr Bag faq

2013 Chevrolet MuniCipal vehiCles teChniCal Manual

Can the installation of push bumpers on the front end of the

vehicle affect the deployment of the air bag?

General Motors is not aware of adverse effects during crash events from the many

push bumpers thai have been installed on GM police vehicles. Because there are

many styles of push bumpers available with varying crash characteristics, installation

of push bumpers may or may not affect deployment timing of the air bags. Push

bumpers should be mounted to avoid modifying the vehicle structure and interfering

with the front air bag sensors mounted on the upper radiator support cross member

Two front impad sensors are installed in General Motors vehicles. Do not relocate or

disconnect the front sensors. The location and orientation of the front sensors are

critical for correct operation of the air bag system. Avoid mounting components on or

near the sensors. Push bumper styles with vertical pushing members that are in

foreaft alignment with the front air bag sensors are not recommended.

When should an air bag inflate?

The driver's and right-front passenger's frontal air bags are designed to inflate in

moderate to severe frontal or near-frontal crashes. But they are designed to inflate

only if the impact speed is above the system's designed "threshold level."

In addition, your vehicle has “dual stage” frontal air bags which tailor the the amount

of restraint according to crash severity. For moderate frontal impacts, the air bags

inflate at a level less than full deployment. For more severe frontal impacts, "dual

stage" frontal air bags deploy at full levels.

If the front of your vehicle goes straight into a wall that doesn't move or deform, the

threshold level of the reduced deployment is about 12 to 16mph (19 to 15 km/h), and

the threshold level for a full deployment is about 18 to 24 mph (29 to 28.5 km/h). The

threshold level can vary, however, with specific vehicle design, so that it can be

somewhat above or below this range.

If your vehicle strikes something that will move or deform such as a parked car, the

threshold level will be higher. The driver's and right-front passenger's frontal air bags

are not designed to inflate in rollover, side impacts, or rear impacts, because inflation

would not help the occupant.

Seat mounted side impact air bags are designed to inflate in moderate to severe side

crashes. The side impact air bags will inflate if the crash severity is above the

designed "threshold level." The threshold level can vary with specific vehicles design.

The side impact air bags are not designed to inflate on frontal or near-frontal impacts

or rear impacts, because inflation would not help the occupant.

Roof rail mounted head-curtain air bags are designed to inflate in moderate to severe

side crashes. In addition, certain vehicles have head-curtain air bags which are also

designed to inflate in situations where an impending rollover condition is identified

by the vehicle's rollover sensing system and/or frontal or near-frontal impacts if the

crash severity is above the designed "threshold level".

Safety belt pretensioners at the driver and front passenger seat positions are

designed to deploy in frontal, near-frontal, side, and rear crashes that exceed the

"threshold level" of crash severity to help reduce slack in the safety belt Safety belt

pretensioners will also deploy in impending rollover situations.

How long will the air bag remain inflated?

It takes approximately 1/20th of a second to fully inflate the frontal air bags. This is

faster than the blink of an eye. The air bags begin to deflate immediately, helping to

stop the occupants more gradually.

I've heard that a deployed air bag produces whet appears to be

smoke, is the air bag hot?

After the bag has deployed in a crash, the air bag itself will not be hot to touch. Some

components within the air bag module will be hot for a short time. A small amount

of smoke coming from a deployed air bag module is normal and should not be cause

for concern.

Also, when the nitrogen gas is vented out of the air bag, small particles from inside

the bag are also vented into passenger compartment. These airborne particles look

like smoke and some particles are deposited as residue on and around the air bag.

I've heard that the dusts that are released into the passenger

compartment from the air bag are harmful, is this true?

For most people, the only effect the dusts will produce is some irritation of the throat

and eyes, and that is only if the occupant remains in the vehicle for many minutes

after the air bag deployment with no ventilation and windows closed. However, some

people with asthma may develop an asthmatic attack from inhaling the dusts. If this

happens, they should first treat themselves the same way their doctor has advised

them to treat any other asthma attack, and then immediately seek medical

treatment.

Can the air bag system be re-used?

No, The air bags are designed to inflate only once. After inflation some new parts will

be required. These will include the air bag module and possibly other parts. (A

competent service technician with access to the vehicle's service manual and the

required tools should replace the required components after a deployment crash.)

If my vehicle has air bags, why should I have to wear my safety

belt?

Air bags are in many vehicles today and will be in most of them in the future. But

they are supplemental systems only; so they work with safety belts not instead of

them. Every air bag system ever offered for sale has required the use of safety belts.

Even if you're in a vehicle that has air bags, you still have to buckle up to get the most

protection. That's true not only in frontal collisions but especially in side and other

collisions.

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