Technical Persisting airbag B010200 fault

[sjokotof]

I have an Fiat airbag module with the EEPROM 25LC640A that has the B010200 error, I removed the error between CE0 and DE0 (replaced it with FF's).
When I installed it back, the airbag red light was disappeared at first but appeared again within 10 seconds.
The car reader says it's still error B010200.

Could there be something I missed in my code?
Or could there be some lose wires somewhere in the car?
Does anyone have any clue or schematics? (It's a 2019 Peugeot Boxer L3H3 2.0 BlueHDi 130).

In attachment you can find the file that I writed into the EEPROM.

 

[theoneandonly]

What year is your van? I believe you are just reseting the error flag which is reset when you connect the ecu as the original problem is still live.

 

[sjokotof]

What year is your van? I believe you are just reseting the error flag which is reset when you connect the ecu as the original problem is still live.

Thanks for your reply, it’s from 2019.
I think you are right about the original problem still being alive, do you know what can cause errors like this? What should I double check?

 

[theoneandonly]

Thanks for your reply, it’s from 2019.
I think you are right about the original problem still being alive, do you know what can cause errors like this? What should I double check?

Ducato airbag ecus have been failing in high numbers since 2012. I believe it to be poor voltage regulation but earth issues are also on list as is water ingress/ condensaTION. Bellow is result of a poll I made on another forum.

Yes 50% failures of ecu before 2020 so a lot failed but newer ones less prone to failure.
Recently i fell foul of this and replaced my 2017 with a new one from Coastal motor homes. £205 and a proxi align with Multiecuscan

 

[the green vanper]

Those FIAT airbag modules, especially those used in the x250 (pre-2014) are very sensitive to voltage fluctuations. I think that also the ones that where installed in the x290 until somewhere in 2017/18/19?

Water evacuation system from the windshield / scuttle tray was improved in 2014 (with the x290 introduction), so this might be the reason why their modules seem to be built in a different / better way. However it's an assumption only.

From what can be found on different FIAT / motorhome forums the newer (post 2017/18/19?) modules are more robust...

For the possible original causes, in addition to what @theoneandonly wrote before:

sudden voltage drops when the module is still active (like battery disconnection before the modules have not been set into the rest mode or attempts to start the engine with a weak battery); I had my battery totally discharged a couple of times due a voltage drain when the van was not used for a couple of weeks and luckily nothing happened - but the drop below the acceptable voltage happened when the ignition was off for weeks so the modules were definitely in the rest mode

shorts when playing with the electrical installation (again especially when the modules have not been set into the rest mode), before playing with the airbags or prentesionners installation disconnecting the battery in the safe way is a must; I've read a couple of posts where the cause was swiveling the seat(s) when a pretensionner cable was in the way, so the insulation was damaged and the cable was shorted to the base (= earth).

From what I could find some of the damages can be repaired by specialized companies. Perhaps just the way you're trying, or perhaps they are able to trick the system in another way. Or are just replacing an element on the PCB.