I'm just going to share my success with my Airbag Warning light, and cover somethings that took me some odd head scratching and loads of searching- so maybe this can save someone else time in the future.
The light came on Sunday and was fixed yesterday Tuesday.
This Monday I was completely new to this whole world of connecting the computer to a car- and I have basic computer knowledge. And I must say this was very easy.
Warning Light came on: discovered very soon that the light wouldn't disappear with the easy trick in a "01 147" of just "cleaning" the usual connections without removing the errors in the ECU with some kind of software.
So first off: Buy the cable- I bought a VAG KKL FIAT with the 4 position switch so you can with ease switch between the settings and for this purpose the AirBag setting.
I only have a Mac- also again this I haven't found covered, so what I did:
1. Installed Win XP in VMWare Fusion
2. Installed the correct drivers- Ross-Tech: VCDS: Downloads: Which One?
3. Did the usual trick in XP where you search for the specifik drivers in the Device Manager- for e.g c:/Ross-Tech- and then it didn't have the Communication Port drivers installed, but I just let it do it's own thing to search for the drivers- and it worked.
4. Install .NET Framework- I used version 3.5.
5. Download and install multiecuscan- I actually thought that the 20min session limit would work for in instance once a day- but no I was wrong, it's just to restart the program no worries there so no need to actually buy the software if you are a one time user like me.
Many claim that you can test the USB VAG KKL in the VCDS without connecting it to the car- that's not right, the led (at least for me) didn't light without connecting it at the other end.
It worked straight away when I connected it to the car.
The connection is just below the steering wheel, two screws holds the cover in place- just remove the screws and it will fold down- and the connector it's just right below the fuses.
Make sure that you have your cable set to the airbag setting.
Then within Multiecuscan you choose settings and then interfaces, mine said K-Line/VAGCOM and it only worked with choosing Serial Port COM3.
Now turn the ignition on.
So now it's just to scan for faults- you do this by choosing your car spec- then airbag, for me I had the two choices between Allied My97 Airbag and SIEMENS My99 Airbag- I assumed that I had the Allied airbag. Then it's just to press connect or f10. Press the Y button.
Now it connects and then it's just to wait, takes a couple of seconds- then it's just to go to the tab F3 Errors. There it will show what errors you have. My error was that the drivers curtain 255 squib value was too high. I searched the threads here at AO- and it seemed to be the connector in the boot.
Before you fiddle with the airbags disconnect the negative on the battery for at least 30min.
In a 147 you'll find this yellow connector in the boot just behind the flap behind the rear light.
Otherwise it could be a fault just under the drivers or passenger seat, you can locate these just at the front of the seat.
Clean the connection, plug in the battery again, turn the ignition on do the same procedure as before in Multiecuscan and now hopefully *fingers crossed* you can clear the errors and the light should disappear.
Total cost for me was around £25 (250kr) and in Sweden this would cost around £225 to fix at the local mechanic, I had an XP licens and VMWare as a Trail.
I also made sure that I had the radiocode http://www.alfaowner.com/Forum/ice-a...-here-168.html
just in case- but it turned out that I didn't need it, but many thanks to Hay88.
Just to summ it up:
It's not very hard, I was completely new to this.
Does it work on a Mac? well yes kinda with VMWare it does.
The KKL VAG Fiat cable that I used felt a bit dodgy, got it from Tradera (Ebay) was delivered the following day- I was in a bit of a hurry to get this fixed since me and my girlfriend travel a lot- if I would have gotten more time I would probably have ordered one from RareBear (seems to be a "standard" cable around here) and sure seems nicer.
Hopefully this will save someone time in the future, and is for help for other Alfistis.