Fiat Ducato Airbag Warning light - Code B0100-49

soram

Just started my camper and the airbag warning light came on. ECU scan says it is B0100-49 which apparently is a common fault due to battery voltage. It can only be reset by a specialist. Google says CrashData in Liverpool can fix it for £70 but I was wondering if anybody knew somebody in Ireland that can reset it? Or have had any experience with CrashData?

Cheers!

Mefistofelino

https://www.boards.ie/discussion/2058334366/fiat-ducato-airbag-warning-light-code-b0100-49

Just been through this. I sent my ECU off to Crash Data a few weeks ago where it turned up a couple of error messages (B01000-49 and B0102-00 fault code) and the unit could not be serviced. Had to buy a new unit, coded to my motorhome, from Crash Data for about £360, which is considerably less than Fiat look for. A few points to look out for:

1) You'll need to do a customs declaration for shipping the unit over that it is being shipped for repair. Otherwise you'll be on the hook for Duty.

2) Once Crash Data get hold of it, their turnaround is very fast, at least for ones that can be reset. My ECU was delivered around 10:30 and I had a email confirming the diagnosis in under two hours. If it just needs resetting, it could back out the same day

3) If you need a new ECU, I believe they programme these in batches so there may be a small delay.

4) The replacement unit was boxed as a Magneti Marelli FIAT part and looks identical to the FIAT unit.

5) The error message is usually due to an overvoltage. I believe campers are very susceptible to this due to their occasional use. I don't believe "normal" Ducato vans have the same issue.

6) I found this video helpful for the removal and installation process. https://youtu.be/rmlcx2dVrvk?feature=shared

soram

Many thanks - that is all great info! I will get the out this week and send it off.

The van is 2014 and never had an issue. But I did hear it was an overvoltage problem. I've had a lithium battery and a Votronic charger in a year now and also never had a problem. However, I just installed a Dometic Freshjet Air Con and I 'think' I might have started the engine with the shore power cable plugged in. I never normally do that but somebody on some blog reckoned that might cause a spike :(

I'll have to be more careful....

spaceHopper

Try here https://www.logicautomotive.ie/abs-unit-repairs.html

soram

Update - so I went with CrashData. Unit came back this morning - it's fitted and working perfectly again.

Cost total was around €150 (£70 + £30 shipping to CrashData, €15 to AnPost and €22 to Customs). CrashData warn you that whatever you declare you will be charged customs on. I went with £70.

The print out with it says it is because of a low voltage of 11.8V. But last year my battery died going onto the ferry and had to be jump started and that didn't affect it at all so I'd really like to know exactly what causes it and if the unit can be exchanged for a more modern less susceptible device......

soram

Further update: Check Airbag fault back again after I just moved the van. My Victron Shunt says the voltage did not drop below 12V and that was only when I cranked the starter and the van has been on shore power for the last few weeks in the drive :(

Guess I'll probably have to go to Fiat now and see if there is a different model available. I'd really to knwo what is causing the issue!

spaceHopper

Get your battery checked. I fitted a 50W panel to my van and controller that charges both batteries. It's old so no electronics but I was sick of having a flat battery. You could get a 5W panel and put it in your windscreen to keep the engine battery toped up

soram

Cheers - But I have a full solar array, lithium batteries and a Votronic 3 way solar charger that is supposed to do everything!

I have just changed the starter battery in case and will send the unit off to Crashdata again…….

soram

One thing concerns me - CrashData stated on the last repair that the voltage was 11.8V and this caused the issue. I have seen on other forums that people say to turn the ignition on and then wait for the dash lights to go out before cranking the engine. I am guessing the Airbag unit possibly checks the voltage when booting so immediately cranking would cause a large voltage drop and fault the device. But my van is 9 years old and I have never had to worry before.

When I put the new battery in last week I monitored the voltage on the smart shunt. It showed 12.85V which was nominally fully charged. Turning the ignition on and the voltage dropped to around 12V and just under 11.95V. It recovered to about 12.2V after a few seconds after which I cranked it and during which it dropped to 10.2V.

So there is a big load when the ignition is turned on. Do people know if this is normal? I am guessing the glo plugs come on in that period but is that voltage drop within the normal range?

The van was fully serviced by Linnane's late last year including the timing and all other belts. Might there be something I need to look out for / review?

Just a brain dump of thoughts but appreciate any comments!