Hi my name's Ben Martins I'm one of the automotive applications specialist
here at Pico Technology in the UK
And today we are going to be looking at
the keyless entry detector, the TA330.
So what is it? Well it operates at 125 to 140 kilohertz
and that's about the operating range for most manufacturers for keyless entry and
smart key entry vehicles.
An important factor to remember is that it won't decode the security information that's
actually sent out so it's not going to cause any problems there.
Now, it's a three meter lead, which allows plenty of maneuverability around the vehicle in
order to get to the certain areas that you need to actually inspect.
A couple of things to point out to start with before we actually get going is the detection zones
now, most keyless entry vehicles have a detection zone around the vehicle
in about a two meters area usually around the door handles and around the
boot area so bear that in mind. What we're going to do is we can start by
looking with the vehicle locked up, to start with, just to see if the vehicle
is going to output anything and transmit as a frequency that we can
actually detect using the the keyless entry detector.
So with the scope set up we're going to operate on about
200 milliseconds per division timescale and
plus or minus 10 volts we don't actually know at the moment what that's going to
output and obviously from manufacturer to manufacturer they might vary so pick
something quite broad to start with just to see if we can capture something.
So, we'll get the scope up and running. Now, this isn't a smart key vehicle, if you like,
this still actually has a button that you actually have to press.
It's still keyless in the terms of the fact that you don't actually have to physically put the key in
you can keep it in your pocket still. Now, I've got the key set further away as I said before
in order that the vehicle doesn't unlock.
So, we're just going to offer up the keyless entry detector to the door handle and
press the button, and as you can see we have got some activity there.
Quite a small scale still at the moment so what we're going to do is
we're going to just stop the scope there and we're going to go in a bit closer, so
we're going to drop the voltage to about two volts for the minute and we'll get
the scope up and running again and we'll have another look see what we've got.
Again, what you may find is that actually exactly there that there's different
points on the door handle that will actually transmit a higher frequency so
one of the things with the actual keyless entry detector sensor is that you can
actually pick up where the high points are and where the low points are on the
handle which can be very useful if you're actually looking to diagnose
certain faults that you may have with that with the actual transmitter itself
Okay, with the keyless entry detector not only will it just detect the, obviously,
the keyless entry side of things but we can also look at the smart start or keyless
start as well. What it would do is obviously there is, we're talking about
transmitters outside of the vehicle in the detection zones but also
inside the car there is the same thing. So what we can do is if we've got
an issue if you like with the vehicle not actually changing state if you're
pressing the ignition on an off button we can actually determine whether or not
the car is actually looking for the key in the first place. So by taking
the keyless entry detector we can actually as I said sniff out to see if
there's any sort of activity going on inside the car
so just by purely having the the keyless entry detector in sort of the middle of
the car area we can already start to see that there is some activity.
Moving closer around in the different areas, again, we can start to see even more activity
and then basically isolate exactly where that key transmitter is and therefore if
we did have a problem with it or we didn't we could obvious consult the
repair manual and see exactly where the locations should be if we're not
actually picking anything up