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Alfa Romeo Giulia 2017 2.2 JTDM Super
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Discussion Starter · #1 · (Edited)
Hi,

Recently my Giulia have thrown an error code that triggers a whole bunch of dash warning lights to appear.
  • Check airbag
  • Electronic parking break
  • Forward collision warning not working (some times)
  • Hill assist, or what it is called (some times)
This has happened on and off for a couple of months, my first thought based on reading posts here was that the battery was the issue. It was the original battery from factory, so I replaced that with a new one. However the issue still remains.
Using MES I was able to read the fault code as:
Airbag / NAB/ORC (Airbag/Occupant Restraint Module)
Bosch Airbag
ISO Code:
00 1A 50 B0 14
Hardware number:
0285012907 - Ver: 20
Software number:
BB70448 - Ver: 0203
Errors found:
B0050-13 - Driver's seat belt switch - Open circuit
I could also monitor the driver side seat belt switch with the parameter in MES.
Trying to reproduce the issue I tried to wiggle and tug on the seat belt, but nothing from that. After that I reached under the seat and tried to wiggle and pull a bit on cables and connectors. While wiggling one of the big connectors, (see the image below) the error was thrown again, lights on dash board and I could see in MES that the seat belt switch was "faulty". I managed to reproduce it a few more times, but not every time.

Because of my inexperience working with airbags related stuff on modern cars I have a few questions.
  1. Do I need to do anything special to make it safe to unplug the cable under the seat or is it fine as long as the car is off?
  2. What could I do to fix the connection, bending anything? Cleaning with what? Alcohol?
  3. If I were to try to find a replacement cable harness, is there something special I need to keep in mind?
  4. Where would I be able to find one?
  5. Any other tips that I should try or know?
  6. Any wiring diagrams available to use for reference?
Thankful for any help

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I don't have all the answers but you can unplug the large seat/airbag connector with ignition off without issues.
 
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@Alpeace it's either switch in seat belt buckle or wiring. if I remember connector for seat belt buckle is green one - you can see in your second photo in the background some green connector just below the label. otherwise just follow wiring from buckle.
 

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Discussion Starter · #4 ·
I don't have all the answers but you can unplug the large seat/airbag connector with ignition off without issues.
Thanks, then I feel more confident to check it out further.

@Alpeace it's either switch in seat belt buckle or wiring. if I remember connector for seat belt buckle is green one - you can see in your second photo in the background some green connector just below the label. otherwise just follow wiring from buckle.
Thanks I will check out the green one as well then.
 

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it was in a less complicated car, as I recall, removed the seat, then removed the bolted in belt system, then shook it out. I think it would be a much bigger deal in a modern late model Alfa or other car. In my near 60 year driving and car maintenance and repair history, I have had just about every adventure one can have with my vehicles. I recently had a failed fuel pump in my 1952 army M37 3/4 ton Weapons Carrier, 20 miles out in the woods, and it cost almost $1500 to get a rescue vehicle to get it out and home. I could write a book with my adventures and mis-adventures. Like the time I drove my TR4 1,000 miles with no oil pressure, or the time my MGB did a 360 in the air, landed back on the wheels & only put a little tear in the top, or the time I outran the Italian boarder guards in my '69 Dodge Charger R/T, or the time my GT3 blew a piston a thousand miles from home, or the time I drove way out into the Nebraska hinterland to change my oil on a dirt road, and lost the plug in the weeds. Or the time I changed my hot engine oil, then under the car, turned over and managed to put my foot into the just drained hot oil, Or the time I was with a girlfriend in an social adventure, when a local sheriff pulled up behind us way out in the country, or the time......... NV
 
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