Webasto! Why won’t it work on its own…. VCDS enabled??

D

datsundrew

A2OC Donor
So, I have posted about my Webasto not working before, and at the time I had a code for the G263 sensor behind the dash.
I replaced this in the summer and was hoping that come the cold weather I would be privy to the joy of the webasto firing up….but no!
There are no faults other than the usual flaps etc. Its below 6 degrees, the heater is on, and it’s not on eco, I have given it everything it asks for, but no.😰
If I plug in VCDS and hit channel 22 it fires up with absolutely no problem, but never without? It occurred to me that it’s possible it could be some sort of coding issue? Is this possible? Anyone any ideas as to what could be blocking it’s instructions?
As it is it’s effectively useless, but before I swap in a Rover 75 board and have it on a switch I really would love it to work as intended, anybody have any ideas??
 
datsundrew said:
So, I have posted about my Webasto not working before, and at the time I had a code for the G263 sensor behind the dash.
I replaced this in the summer and was hoping that come the cold weather I would be privy to the joy of the webasto firing up….but no!
There are no faults other than the usual flaps etc. Its below 6 degrees, the heater is on, and it’s not on eco, I have given it everything it asks for, but no.
If I plug in VCDS and hit channel 22 it fires up with absolutely no problem, but never without? It occurred to me that it’s possible it could be some sort of coding issue? Is this possible? Anyone any ideas as to what could be blocking it’s instructions?
As it is it’s effectively useless, but before I swap in a Rover 75 board and have it on a switch I really would love it to work as intended, anybody have any ideas??
Click to expand...

I’m very interested in the answer as I have the same problem

Paul


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datsundrew said:
It’s bloody maddening isn’t it!!!
Click to expand...

The only saving grace is the Audi heated seats get toasty warm on no6

I don’t yet understand why it is doing this. If it didn’t fire up using vcds then I would accept that it’s broken but when vcds fires it up but the car doesn’t it makes no sense

Paul


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depronman said:
The only saving grace is the Audi heated seats get toasty warm on no6

I don’t yet understand why it is doing this. If it didn’t fire up using vcds then I would accept that it’s broken but when vcds fires it up but the car doesn’t it makes no sense

Paul


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Click to expand...
Yes exactly! I’d rather it was just broken like the one in our silver A2 that had no coms with the webasto at all and not working either!
 
datsundrew said:
Yes exactly! I’d rather it was just broken like the one in our silver A2 that had no coms with the webasto at all and not working either!
Click to expand...
Has it locked out ?
There could be a maximum number of failures that needs to be reset before starting , the unit in my galaxy had a max of 6 if I recollect correctly.
 
depronman said:
What did you do to reset it ?


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Click to expand...
Unfortunately it was a different manufacturer Erspacher or similar
depronman said:
What did you do to reset it ?


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Click to expand...
unfortunately it was a different manufacturer

(EBERSPACHER)​

Just possible that there may be similar lockout on the Webasto units
Can’t look at VCDS at the moment .
 
Not sure if this may help but early Webastos had a different firmware version to later ones. If a later Webasto is fitted to an earlier car or vice versa there is a possibility that it is the firmware that is the issue and I do believe there was a slight wiring difference between the two versions. Also noted that the fault memory only has the capacity for the three most recent faults, although sporadic faults will clear from the memory themselves if no repeat issue in a set period - just not sure how long that is.
 
I may be going potty, but do I remember someone posting about a compatiblity issue relating to webasto’s and climate panels? Are you guys running your original climate panels for the car?
 
On mine (from admittedly unreliable memory) it was necessary to clear any sporadic errors found in the Webasto menu, then in the Climatronic itself. It would run when the G65 a/c pressure sensor was failed (having just gone back and checked the thread I raised a couple of winters ago - https://a2oc.net/community/index.php?threads/webasto-fault-free-but-doesnt-run.48422/ ) but I don't see anything from the earlier thread that would take anyone here beyond where they are now. The consensus on that thread was that almost any Climatronic can run a Webasto irrespective of what spec it (the Climatronic's original setting) originally had, but the key thing is that sensors and other potential Climatronic errors are cleared (spurious) or fixed (actual defects) to enable it to run.

Have just got my Webasto-equipped A2 back from MOT and the heater fired up first time a couple of mornings ago. One thing I did note. First time I started up I was concerned the battery may be a little low, so I had turned Climatronic to "Off" as well as the radio to reduce load briefly. Started the car up. The usual immediate buzz of Webasto self-test followed by it kicking in a minute or so later didn't happen - and I realised that "off" (as well as "Econ") probably meant that the Webasto run was cancelled. I switched Climatronic back on in the hope that it would do something, and then headed out to work. It was a good 5 minutes into the journey (with heating on HI) that I became aware of the Webasto spooling up to speed. So there appears to be some kind of inbuilt delay if all of the other criteria to activate aren't met when the car is started up.
 
Maybe the climatronic unit itself is the problem, if you have a spare one or someone can swap it with you to test? Take lower grill off and dip sensor in iced water.
 
One my own A2 the climatron potential issue can be ruled out as it doesn’t have it instead the manual three rotary dials which are original to the car

Another rather random thought, i changed the cccu from a Q model to the AF model and the car the AF model came from likely had climatron, is it possible that the cccu may be playing some part in the webesto none working ?

Paul


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It does sound plausible, you need a diagnostic genius to visit! I'm lucky my friend is an ecu specialist but way down here in South West. He would know.
I would say when triggering from the vcds it bypasses all the other inputs so it can still be one of them, the outside temp sender, the climatronic unit, so that really only leaves the climatronic unit in the op post.
I'm with you I have three dials I chose the car specifically to get away from climatronic.
 
Are you able to see what temperature the webasto internal heat sensor thinks it is ? using VCDS. mine has a problem where it thinks it's too hot so it prevents it running..
 
Could any Webasto people give me the lbl file name that is shown in the top left hand side of the VCDS screen please?
I have an idea.
Mac.
 
PlasticMac said:
Could any Webasto people give me the lbl file name that is shown in the top left hand side of the VCDS screen please?
I have an idea.
Mac.
Click to expand...
Here you go Mac,

I'm running a registered - unlimited VIN HexNet cable on my MBP/Windows 10 via Bootcamp:

VCDS Audi A2 TDI Channel 018.JPG

Not much help unfortunately as no .lbl file seems to be associated with the Webasto. The file must be there in the background but the software simply isn't picking up the name.

Just noticed that I have a G81 fault though which could be the cause of mine not firing up:

A2 EUD G81 Fault.JPG

I'll investigate this later on, could be a wiring issue, damaged connector or faulty sensor. Should be easily resolved with my fingers crossed that the Webasto kicks in again. It was certainly working when cold enough earlier this year after playing with the output tests and test run on Ch022.

Kind regards,

Tom
 
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2work said:
Here you go Mac,

I'm running a registered - unlimited VIN HexNet cable on my MBP/Windows 10 via Bootcamp:

View attachment 115843
Not much help unfortunately as no .lbl file seems to be associated with the Webasto. The file must be there in the background but the software simply isn't picking up the name.

Kind regards,

Tom
Click to expand...
No, that's a bummer. There must be a file, and it'll have the run conditions in it. I'll poke around vcds later.
Mac.
 
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