The supplemental inflatable restraint (SIR) system supplements the protection offered by the vehicle
seat belt system. The SIR system has several inflater modules located throughout the vehicle. The
inflatable restraint steering wheel module, inflatable restraint dash module in passenger side of dash,
and the inflatable restraint side impact module - LF and RT. These can be located in the sides of the
seat or inside side body trim. Each inflater module has a deployment circuit that is controlled by the
inflatable restraint Sensing and Diagnostic Module (SDM), which is mounted inside of the vehicle,
usually under the passenger side carpet.

The computer determines the severity of a collision with the assistance of various sensors and inputs.
When the system detects a collision of sufficient force, it will process the information provided by the
sensors to inflate the airbags. The SDM performs continuous diagnostic monitoring of the SIR system
electrical components. Upon detection of a circuit malfunction, the SDM will set a diagnostic trouble
code and inform the driver by commanding the instrument panel cluster (IPC) to turn the AIR BAG
indicator ON. The steering column and knee bolster pads are designed to absorb energy during
frontal collisions in order to limit leg movement and lessen the chance of injury to the driver or
passengers legs.
Has my car been in a accident if the airbag light comes on when i start my car.
Comments
Not necessarily. The airbag light does mean that car was
in an accident. As with all warning lights, if one comes up
on the dash and stays on, that means the computer for
that system sees a problem. A scan would be needed to
see what is wrong. But, if the car was in an accident, and
not properly repaired, the light would also be on.
can a front air bag sensor go bad? 2005 Buick Lesabre
As with any sensor, yes, the front impact or also called
discriminating sensor can go bad and cause the airbag
warning light to come on the dash.
My 2006 Chevy equinox air bag stay on after I start the vehicle. I got the DTC computer
checked and it stated nothing in DTC. I changed the fuse 10amp and still nothing. Left the
fuse out for 24 hrs and then the light stay on again. Help?????
Did you scan the airbag computer or the powertrain
computer? If the light is on, there must be codes, or no
communication- which means a bad module.
Mechanic said he fixed the air bag light on 2002 Cavalier. Found out they painted over it
inside the dash. What can be done
Assuming you mean what to do about their fix and not
the actual problem of the car, I would try some legal
action after confronting the manager and demanding
your money back and the car to be repaired at no cost.
This trick MAY be against federal laws.
Any GM owner have a similar Air Bag light came on when driven in a heavy down pour? I
own a Chev 1995 4x4 pick-up. Anyone have a similar. Air Bag diagnostic? Kindly contact.
Whats Happening i am new to this, I stumbled upon this I've discovered It positively helpful
and it has helped me out loads. I'm hoping to contribute & assist different users like its
helped me. Good job.
My airbag light stays on in an older truck I bought. I found that the fuse is missing for this.  
If it was in an accident, is there a chance the airbag could go off if I replace the fuse.
With the fuse out the airbags theoretically cannot blow
off. The fuse was probably out to disable it because they
did not have the money to fix it. Replacing the fuse can
re-enable the system, but it should not function with the
light on. Unless the previous owner was afraid of airbags
and did not want them. So it is up to you to replace the
fuse or not.
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Airbag Warning Light On The Dash