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!

funnyname

https://www.boards.ie/discussion/comment/122053245#Comment_122053245

Hi Soram, did you get this sorted?

I let the battery in our 2011 fiat ducato camper go flat too many times last year (due to it being parked up for too long) and I got it replaced. I can't remember if the airbag light was on before or after this but I contacted crash data and they said they couldn't repair the ecu unit as it was too old. So the story is I had to buy a new airbag ecu module however I have gone to three different places including the main dealer and no one has been able to communicate with it. It has to be faulty but the main dealer where I bought it from is being slow in admitting this. I don't know what to do next.

soram

Hi - all I did was send my device to CrashData again and they reset it - again - for more money. So I am sorted for now but still worried it will happen again.

Where did you buy the new module from? It is my understanding that these need to be coded to the vehicle so if you get it from the Dealer or CrashData as a replacement I would expect that coding would be included in the purchase. I don't believe the coding is possible over the standard ODB connection so would need a specialist that can access the eeprom memory directly. I emailed a couple of guys that do programming around Dublin but nobody replied. So CrashData again or I think there is another company in the UK that do similar work.

funnyname

https://www.boards.ie/discussion/comment/122172653#Comment_122172653

The pic attached is of the old one and the new one has a part no of 1371008080, I got it from the fiat main dealer via Galway truck centre.

I wonder if I could pick up a 2nd hand one as crashdata have told me that my one is unrepairable.

Mefistofelino

https://www.boards.ie/discussion/comment/122200013#Comment_122200013

1. I think it will need to be the same model number as the original
2. It will need to be coded to your vehicle's body control module (BCM) and engine ECU. I think that only main dealers (or the likes of CrashData) have the kit for this -I don't believe its doable from the Fiat MultiECUscan diagnostic module. whether your local main dealer will reprogram a second hand module, I don't know.

https://www.boards.ie/discussion/comment/122053245#Comment_122053245

This was the typical behaviour on my VW T4, down to 11v or slightly lower when glowplugs were on at cranking. That was with a strong battery.

soram

So……the freaking error is back. This time happened as I was driving along after about 15 minutes from starting up :(

Same error B0100-49 but this time with a battery voltage in the error log of 14.400V and speed 53km/h. I wasn't convinced the last time that it was a low voltage issue. Is it time to buy a new module or go to Fiat and have it sorted out? Can / will they even sort it or just throw parts at it?

air

https://www.boards.ie/discussion/comment/122201808#Comment_122201808

Just to correct this, you can do it with MultiECUscan all right, you just need to do a proxy alignment, very easy.

soram

Update - so I got Linnane's Fiat in Rathnew to replace the module yesterday. I think it was about €425 in total so not mad extravagant. They said it was guaranteed too.

Hopefully that is it for a while now.

air

£240+VAT for a new one from www.northernautotech.co.uk, 15 minutes or so to configure with MultiECU scan.
They will take the old one and attempt a repair, if the old one isn't repairable they will credit the repair fee against the sale of a new module, new modules come with a 12 month warranty.

soram

https://www.boards.ie/discussion/comment/122519095#Comment_122519095

Yeah, but that is plus import duty and shipping and a faff if it doesn't work like my last 2 repairs and shipping back to the UK and the faff and duty again for any warranty. I was happy enough with Linnane's price.

air

Sure, not knocking it, was just giving an alternative option.
There was no import duty thankfully.