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I am trying to put number plates on my father's 2004 GT that has been hanging in the garage for a while with a battery tender. For this I need to pass the Swiss automobile inspection prior to being able to put number plates on it. The airbag dashboard light doesn't come off and I plugged two different scanners and tried to reset the trouble codes but two of them won't erase. The batteries are full and I drove the car a while and tried to reset the codes again. 01212 code says it's an open circuit on my rear passenger side seat belt pretensioner, it says it's intermittent. I removed the back seat and managed to access the seat belt pretensioner, I measured the resistance and it was the same as the rear driver's side. I sprayed some contact cleaner on the connector and tried again with no success. I have a trouble code 00003 that the scanner lists several times (I attached some pictures). It seems to be something with the electrical control unit
I don't have access to a vag scanner or a Siemens VAS5052. I do have IETIS though
I'm wondering if the airbag problem could be related to this ECU problem. I hate disconnecting the batteries on this car since from what IETIS says one has to plug the computer and erase trouble codes each time. A few months ago the car worked fine and I had no trouble codes. I disconnected the batteries since then and I'm having this problem.
Does anyone have any clue of what it could be? I want to sell the car but first I need number plates. I could of course have it towed to a Bentley dealer but I'd like to avoid that since dealers in my area are incredibly expensive. My main problem is the dashboard light right now.
Only thing I found so far from Rosstech is:00003 - Control Module: Defective
Possible Causes
Control Module faulty
Control Module Software Issue
Possible Solutions
Check Control Module
Check for Control Module Software Update
Replace Control Module
Sorry for the picture quality this is from a Delphi scanner. I tried one from a brand called AUTEL which seemed better, it would tell me the cd charger is broken which it is, but the 00003 and 01212 codes won't go away. In my IETIS I can't seem to find the trouble code page, it says that it's on something called Masterdata which I don't have access to.
I would be thinking weak main ( LHS ) bat .
Some ECU,s are more voltage sensitive than others and squeal easy .Normally in my experience with German cars it’s the airbag light .
Wouldn,t do it any harm and look good to a punter if it had a new bat , the big one .
The battery is from 2017 and has been connected with the tender all the time . I even just tested it with a professional tester that a friend lent me. I do have a spare battery which is the exact same. 95ah 780A. I might as well try to swap them. Maybe the fact of unplugging the battery could do something. I never dare because I don't have easy access to an OBD computer to reset the codes.
