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Fixed my airbag warning light after a bit of research and detective work. After failing a Warrant of Fitness test (WOF, NZ's version of the UK's MOT) for a dud main airbag warning light I removed the warning light pod to find a previous owner had cut the LED off the cicuit board. We had a few spare LEDs at work, so I resoldered one in (I put in a yellow one to later discover it should be red). The light went on, went off, came back on and stayed on.

I tried to connect to the Airbag ECU using both KWP71 and FiatECUScan, but go no further than being able to connect. I had modified my cable with an switch enabling me to select either pin 3 of 7 for airbag or engine ECU. After researching here on AO and on other sites, it appeared that the earlier Airbag ECUs used a proprierty, or at least oddball comms protocol, and required Fiat Examiner to clear error codes. As I wanted to be able to clear any future errors I ordered a secondhand one from Auto Lusso asking for the part numbers that superceeded my early unit sourced from ePer. The local 'specialist/wrecker' in Auckland wanted NZ$650 +tax. That converts to about GBP350 all up! Thank god we live in a global market place.

I also needed to work out what had driven a previous owner to cut the LED. The passenger seat has a few unsual small lumps in it and I realised that this was the passenger sensor and that it was damaged, probably by somone cleaning the seat. After a little more online research I found the solution was to fit a resistor in place of the seat sensor. It took a lot more searching to discover the correct value of the resistor which is 2K7 (although anything in the 2K up to 3K range should work). Not 2 Ohms as is stated in many posts, this is so small a resistance that it is impossible for it to be correct.

The replacement ECU arrived from Auto Lusso and I fitted it after disconnecting the battery for 30 minutes. This time the Airbag warning light came on and stayed on. As I had hoped I was able to connect with both KWP71 and FiatECUScan to the later model ECU. However the ECU showed a fatal 01 error. The 'new' ECU was DOA out of the box. Got back in contact with Auto Lusso who sent me another one without question and 'long story short', problem solved. Many thanks to Auto Lusso for great service to a customer halfway around the world.

Darryl in New Zealand

Last edited by KiwiAlfa156; 27-03-11 at 22:00.
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Originally Posted by TOX1C View Post
Yup, true to form after 3 months or so without a light on, and after yesterday's post; YES you've guessed it the light came on today, went off, then on. Gave the same cover a few thumps - off it went, here's hoping for the best tomorrow.
I hate electrics and electricity. Proper phobia. Saw a mate get electrocuted on a cooker when I was about 6. Can't even change a lightbulb now

Mines come on. I've used the free version on FiatEcuScan and it told me there is a short somewhere between battery and airbag on both passenger side ans drivers side. Unfortunately, I couldn't see if the free version would let me reset within the 20 minutes it gives you (Wife was right, read the instructions first :FP. Can a reset cure the problem?

Where is this cover located. I'm quite confident in punching a bit pf plastic.

Last edited by NinJaSkrtel; 17-02-12 at 19:25.
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There is a real problem ! after reset it
return !
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It is now an MOT failure ive been told if any warning lights dont go off after a few seconds and if the dont come on , mine has been on for 2 years now will be getting it checked out first before i put through mot in may...
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alfa 156 airbag light

Hi everyone. Does the airbag light has to do with the horn switch? Mine is on and horn does not work...
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In the steering wheel is an airbag part that can fail but I have not seen a case of the horn not working, but it is a possibility..
p.s. The part is a **** spring
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