rev up your engines, today I'm gonna talk about airbag systems now in the case of
the Mercedes there it is the SRS light is on and what's that doing it's telling
you there's a problem with the system only where are you ever gonna figure
that out is with a relatively high level scan tool, in a case of this Mercedes we
go up under here and the plugs in here then we gonna diagnostics Mercedes Benz
and we'll go to Auto scan, it'll scan everything takes a few minutes, so you
can see it as an airbag code, so now get all kinds information from this but
we're gonna start with this read the codes and what have we here 91-83 stored
the resistance in the ignition circuit containing component driver buckle
emergency tension your tractor squeak is too high
so let's translate that in English that means a seat buckle system has a problem
any electronic switches it says the driver is not connected and it's not
connected, well now I'm gonna connect it and see what happens, plugging it in now
says connected, so we know it's actually working even though the computer says
there's a problem so we'll check the ignition circuits here, uh-huh
resistance is too large so that means that the buckle tensioning retractor
system is broken, so all this stuff with Mercedes you gotta buy the whole
assembly, so we go to my alldata selection we'll select the vehicle and
I've look up all the technical service bulletins any possible recalls but
they're aren't any so this is going to be an expensive fix, so I call it
mercedes-benz dealer it's $583 for the tensioning set off and they don't stock
them, you got a special order it, so I'm sure my customers not gonna go for that I
mean it works fine it's just that something's wrong with the electronics
in the back so it turns on an SRS light, now as you can see the scan tool does
a lot, it's an autel 608 it's pretty expensive unit, it's like $5,000
but without one of those there's no way you can work on these
airbag systems, and I tried resetting and it said it reset it but as soon as
I start it up the light comes back on it stays right on
because it's a hard code, now at least here in Texas the land of the free you
can still get your car inspected if the SRS light is, now here in Texas the same
thing goes for abs, if you got a problem with your regular brake system it'll
fail the inspection, but if the ABS system light is on that's not
technically part of the test that's not part of the obd test, so I've had
customers with the ABS light on they still got their car inspected, but if you
live in other states, and I got friends in England they said if any of those
lights are on in England it fails then you're screwed, and you got to pay all that
money to fix this nonsense, because rarely the seat belt buckles in the
computer even knows it's buckled in that part works it's just some stupid thing
in a tensioner that's got some kind of weird electrical short so it puts the
SRS light on, me I'd live without it too, let's face it it's your car your money
you should be able to do what you want not endangering anybody, else you're the
one driving a car, but at least all you people out there know a little bit more
about these airbag systems, that you gotta have a high level scanner a real
high level one to work on those systems, it has to do bi-directional controls so you
can plug things in and out see if they're working and pinpoint what the
problem is, because they're very high-tech systems think about it they
got sensors all over the place the new ones have airbags all over the place
which are basically explosive devices that blow up a bag that you're gonna
bounce off of if you get in a big wreck, we're talking about high-tech stuff that
really you shouldn't mess around with yourself, but if you do have somebody
looking at it make sure they got a fancy machine like this, hey it's your money
demand to let him show you, any honest mechanical hooked this up like I didn't
say okay here's the test look see this works this doesn't work here's, what it
is here's what it's gonna cost, an honest decision on it, not just this
is gonna cost $900 ba ba, get the information behind it then you can make
a wise decision yourself, because I sure as heck doubt that a bunch you are
gonna go on buy this $5,000 scan tool and learn how to operate this thing
so if you never want to miss another one of my new car repair videos, remember to
ring that Bell