Member Since: 06 Mar 2017
Location: Lost
Posts: 4655
Yeah I'd say that's the fuel type (code) that's missing. I'm thinking a re-flash might resolve it.
11h & 81h both refer to coding/fuel type!
Edit: What happens when you try to clear them?yµ (idµ - eAµ) ψ=mψ
8th Mar 2021 12:06 am
itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
When I clear them, they stay cleared until the car starts to communicate with the the FBH using CAN, then the 11h error comes back first. The 81h error seems to come back if I use the w-bus controller (remote) to start the heater whilst the car is trying to talk to the FBH using CAN, so I think that might be a bit of a red herring. I am talking to the w-bus controller designer about that and he mentions this (https://altox.ru/en/news/land-rover-webasto-errors/) but the unit is from eBay, not an altox unit. I need to do a bit more experimenting with it to see.
The question is then, how on earth do you go about flashing a FBH and where do I get a functioning firmware/code base from?!?
8th Mar 2021 7:37 am
itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
Things moving along a little...
I have been talking to the w-bus controller creator/designer who is very knowledgeable about these heaters, the firmware, W-bus etc etc.
He has explained how controller works and it doesn't code/change anything in the EEPROM on the heater so it's not causing any faults.
What he has got (and shared with me) is a copy of the exact same firmware as my heater, so I could choose to re-flash mine if I can get a copy of WTT with engineering mode. He has also offered to help me do that via a desktop sharing app if needed too. He is being super helpful.
His best guess is that the firmware has got partially corrupted in the heater by a low battery or plugging in a charger that is switched on in to the battery etc. He says that there isn't really any self protection on it and it can be fragile in certain conditions.
So, on the hunt for WTT with engineering mode then I can take it from there.
8th Mar 2021 10:53 am
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4655
If you have a GAP IID you could ask Pat if there's anything in the installed firmware, or otherwise available from him?yµ (idµ - eAµ) ψ=mψ
8th Mar 2021 2:25 pm
itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
I don't unfortunately, but good thought all the same.
I have now sourced a copy of the WTT software with the engineering mode I need, so I think I am good to go. I am just waiting though as I want to talk to my new friend (!) about the exact procedure. Last thing I want is to irreversibly screw it now.
I have the 16kb PRN firmware file. Just need to be sure how to backup the firmware that is already on it first, then put this one on it. It seems self explanatory but I wasn't sure if there is anything else I need to know.
Not sure if anyone on here has ever flashed a Webasto using WTT Engineering mode software?
8th Mar 2021 2:58 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4655
If Motolab hasn't done it I doubt anyone else has. It will be interesting to see how it goes but tread carefully!yµ (idµ - eAµ) ψ=mψ
8th Mar 2021 3:07 pm
itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
Oh yes I am doing, don’t worry!
The worst case scenario is that I have to put a new circuit board in my FBH from a used unit, but I’m trying to avoid that if I can help it. Feels like defeat !
I also know that I could just use my w-bus controller and forget about the car starting/stopping it via CAN but that doesn’t feel right as it should work as designed too (in my head). Plus, this has given me a really interesting insight into how the FBH operates, plus the medium speed CAN bus in the car!!
8th Mar 2021 3:19 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4655
I would have to agree with you, and if it were my car I'd want it to run as per design.
WTT 2.16 seems easy enough to come by.yµ (idµ - eAµ) ψ=mψ
8th Mar 2021 3:27 pm
itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
Yep, I’ve got it so I think I am all set. My gut feeling is that if I back up what is already on there, I can always flash it back on again, so worst that can happen is that it is as it is now...
Will try it a bit later on and we will see!
8th Mar 2021 3:38 pm
itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
An update...
Uploaded the new (known good) firmware via WTT Engineering version to the heater and bingo.. See that the fuel type changes from ‘neutral’ to ‘Diesel’ as it should.
And then plugged back in to car loom, tested for codes...
BINGO!
Now.. the w-bus remote control works fine (as expected) but I can’t test the car yet because it is 7c outside here at the moment. Just need to temp to drop down a bit so I can test it.
When the sun goes down in the next hour or so it should drop right off, so should be an easy test. Not expecting any issues though..
I seriously need to send the Romanian (not Russian) guru a few quid on paypal. He’s been helping me all day on WhatsApp - incredible service, considering I only bought a £48 w-bus controller on EBay from him.
8th Mar 2021 6:35 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4655
That's a great result and good to know the W-bus supp supllier offered support. Mind you I don't think he'll sell to you now for £48 yµ (idµ - eAµ) ψ=mψ
8th Mar 2021 7:32 pm
itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
Oh don’t worry, once I’ve seen it working by CAN control again (it’s 6c here at the moment so need to wait until morning!) I’m going to send him over a few quid on PayPal for some beers 🍻
8th Mar 2021 7:48 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4655
Result yµ (idµ - eAµ) ψ=mψ
8th Mar 2021 7:59 pm
Motolab
Member Since: 18 Oct 2019
Location: Sleen
Posts: 1815
PROFSR G wrote:
If Motolab hasn't done it I doubt anyone else has. It will be interesting to see how it goes but tread carefully!
When you have the exact same firmware file/version as your unit needs, i works , sometimes.... but is almost never a solution. .never seen a spontanious fuel type change.......another..issue is... they are also very easy to brick.... and there are sooo many different ecu’s firmware versions from webasto.. brand specific... brick it and its over for that unit/ecu...
No one publish it.. because there is far more damage to be done than solved generally ...Best regards
Harold
Always looking for Pre '55's & Pre war British Motorcycles! knowing or having one for sale? PM please. I visit the UK 6 times a year
Ps. I edit my texts quite often, english is not my native language, so I will edit My “typo’s” etc.
8th Mar 2021 8:14 pm
itguy
Member Since: 30 Dec 2009
Location: Melton Mowbray, Leics
Posts: 181
Well I certainly checked and double checked the firmware details between the doner unit and the my own to make sure they were identical before uploading the new firmware.
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