OEM Webasto Auxiliary Heater To Parking Heater Upgrade

[manders]

I have a few spare recievers if you face a dead end

I have a few spare recievers if you face a dead end

remote battery arrived.. i think it was running low (as amber LED prior to any other feedback), but still not pairing.
VCDS option kept failing 'do to safety reasons', probably low start battery < 12.2v.
I've been pulling the blue cable from the T91 telestart unit, seen lots of people online talking about pulling fuses, but blue cable seems easier.

Pretty sure the relationship between T91-Telestart and the remote is completely separate from Car and/or Webasto heater.

Eugene - I'd happily buy / borrow a spare receiver. Or alternatively I'll send you my remote/receiver.

 

[eugene]

remote battery arrived.. i think it was running low (as amber LED prior to any other feedback), but still not pairing.
VCDS option kept failing 'do to safety reasons', probably low start battery < 12.2v.
I've been pulling the blue cable from the T91 telestart unit, seen lots of people online talking about pulling fuses, but blue cable seems easier.

Pretty sure the relationship between T91-Telestart and the remote is completely separate from Car and/or Webasto heater.

Eugene - I'd happily buy / borrow a spare receiver. Or alternatively I'll send you my remote/receiver.

The reciever and remote only need 12v and ground to pair. Will send a pm

 

[doncarlyon]

Is there anyone in the north east who can sort this on a T6.1 ?

 

[eugene]

Is there anyone in the north east who can sort this on a T6.1 ?

Not a simple job. Requires the overhead control panel installation as well

 

[manders]

Success finally. I sourced separately the identical fob and receiver, but didn't work, could work out which was broken. Brought replacement as a kit, worked immediately.
I was a bit worried about the sound of EuroFighter taking off from under the car, but it all kicked in well.

Robert - quick question. I like you, don't have the control unit. The fob doesn't appear to do anything other than on/off... can't change timers, confirm cooling Vs heating, switch modes. Is that an expected limitation?

 

[oldiebut goodie]

It is because you are doing it on the cheap - you need to use the HTM T100 if you want bells and whistles.

 

[manders]

It is because you are doing it on the cheap - you need to use the HTM T100 if you want bells and whistles.

The T91R manual implies you can do most things through a series of button combinations and led responses, but my remote doesn't respond to anything other than on/off. Out of interest do you have the timer unit installed too, along with your fancy remote?

 

[oldiebut goodie]

I have installed mine for my Air Top Evo40 air heater. Timers, heat control, ventilation is all controlled by the Telestart or the Multicontrol. Not linked to the VW system whatsoever - I don't know why anyone would only do half a job and leave the heater under the control of VW.
Not all the remotes have full function, I have several Telestarts that are restricted in this way, some only allowing 30 minutes run time, some only allowing on and off. It all depends upon the software loaded on the remote, just because there isn't a logo on it that doesn't mean that a manufacturer hasn't put its own software version on it. It is an absolute minefield trying to marry up separate secondhand items like a remote and a receiver. You must buy the receiver and remote as a matched pair ( and ideally know its origin ) or have a large box of various remotes and receivers to play with.
It surprises me that people spend loads of money "upgrading" software then try to get a fully operating system working with the VW part when it is so much easier and cheaper to just swap the ecu for a universal one and use a Telestart remote and Multicontrol. No-one at all was interested when I offered standard ecus in the forum so that you could do this.

 

[roadtripper]

So I've recently discovered my MY21 T6.1 Caravelle has the basic auxiliary coolant heater as this winter was cold enough for it to kick in - I had assumed I didn't due to penny pinching in the 6.1 line elsewhere...

I don't really need a heater I can have on for ages camping, because we don't do that, and while I like the remote warm up on the EV again we don't really use the van like that.

What I do use a lot though is the "REST" function where the heating can run for ~20 minutes from the residual heat when we are parked up and picnicking.

What I'd really like is the ability to just force the heater to run during those periods. I'm aware that this will load the starter battery and I'm OK managing that - if we use it a lot I'm aware we can intercept the power for the heater and main blower and move those to a leisure battery (which I don't currently have). Essentially I'd be happy with just an on off switch mounted on the passenger seat base that forced the heater on when I wanted it, nothing more fancy.

This is the details I can read with OBD11 - I believe the version ending in 1 means it's not got the right VW firmware for parking operation



So what are my options here?

This is going to be infrequent use so is there any capability in OBD11 to just kick the heater on occasionally by triggering any test function?

I've spoken very briefly to Danhag about their plug in solution, though I'm not sure that currently they will ship directly to the UK. It's expensive but as I'm running a VW Warranty if it will do the job the ability to just remove it and return to stock is attractive. I assume this is commanding the heater using testing functions.

Is there a simple way of upgrading the firmware on a 6.1 - this seems to be still a bit on the cutting edge of knowledge?

If I replaced the ECU I assume that will require quite a lot of physical tinkering to achieve it - and at the end will it still operate as an auxiliary heater during winter driving or would I need to turn it on manually?

Would I be better off just finding someone to fit a secondary Eberspacher/Webasto air heater and be done with it? (I'm aware there are cheaper units but I know the 2 big brands from the marine world and would prefer to stick with those)

 

[oldiebut goodie]

Personally I would fit an air heater then you can use it at any time for as long as you wish. Mine is used mainly for defrosting first thing in the morning and warming up the van on the way back from dog walking. Of course it is advisable to run it from a leisure battery so that has to be factored in also. The flexibility that you have with an air heater far exceeds that achieved by upgrading the water heater.
Neither is a cheap solution!
Replacing the ecu with a universal one would mean that it would have to be run from a Multicontrol and/or Telestart with no connection with the van's brain. It would require a fair bit of tinkering rather than being an "off the shelf" solution.
Here is the wiring for integration with the vehicles various components ( I don't know how either ecus integrate with the VW van - I only have a working knowledge of the water heaters physical characteristics for repair not their integration )

 

[TALLANDREW]

Thanks Robert for your reply on my other thread I will press on and see if it clears as it’s not totally dead.

Hi there,

So I bought the complete 40GB FLASHING data archive for VW group. Flashed my faulty screen using ODIS engineering. That didn't help.

I then bought a second new (used) screen from Poland. plugged it in ran a scan and then tried to clear errors using VCDS. new screen also has the same EPROM error code. I can't be so unlucky to buy 2 duff screens, what else can I try?

Here are the before and after scans comparing the 2 screens.




I am totally stumped, I really want to clear this error it's driving me nuts.

To add the screen to the vehicle I just added it to the list using VCDS.
I then Flashed the Heater in ODIS E.
learnt the remote with VCDS.
I then ran VCDS with engine on to do a scan and check everything.
I cleared each code individually as VCDS doesn't seem to clear codes on my t6 via the clear all button.
The EPROM error immediately comes back and won't clear.

Using the mode button on the screen I can choose heating or cooling and it activates the heater and or vents. I get a 30 minuet count down. ON OFF button can then cancel the selection.

 

[TALLANDREW]

what I find weird is that both screens have the millage completely wrong. its like the connection between car and screen isn't setup correctly or is broken.

I checked the resistance down both Bus lines to the connectors under the seat it's almost nothing. The voltage and earth to the screen is good.

I could try using the other flash file I have for the screen, I can't imagine that would help.

7E5919037__0165.sgo
both screens have the 7E5919037__0200.sgo

I am really out of ideas.

 

[TALLANDREW]

I watched Roberts video again on youtube. I copied what he did and the new screen operates as his does.

Pressing power runs the heater and the HVAC,
mode button switches between heating and cooling function
timer works and can be adjusted.
I put the first screen back in the car and that also works it definitely didn't before flashing.

The eprom error is still there. I would love to clear it myself so I can call this job done and move onto the next project.

Any suggestions would be appreciated.

 

[mmi]

what I find weird is that both screens have the millage completely wrong.

The EPROM error immediately comes back and won't clear.

Does it come back with the same mileage and time stamps?
Does the fault counter step up with ignition cycles or sticks at "1"?

 

[TALLANDREW]

I'm sat in the car did another scan .

I swopped the roof module back to the first one.

here's comparison between 2 weeks

the millage time stamp, and fault counter appears unchanged.

 

[TALLANDREW]

new scan

 

[TALLANDREW]

Any idea what the security access code is for the 6e module i tried 20103, seem likely but "computer said no"