L322 MY2005 TD6 Vogue FBH Webasto WTT software

backinblack said:

@kds I've just been to my local garage and they have given me a couple of faulty FBH units so hopefully I can make 1 or 2 good ones out of the 3 that I now have, 4 if you count the ebay one i'm trying to get replaced
I'm confused about the remote start being enabled on the car unless it's just to tell the car to look for the wakeup command from the FBH when the 12v is applied to pin 1. IMO the FBH is just a switch that shorts out pins 1 & 3 as it has no WBUS connection.

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Its been a couple of years since I did this so some of the details are lost in time (its an age thing) but as I understand it on my 2004 as long as 12 volts is supply`d to the switched live on the receiver connection in right rear the FBH will run until it either reaches temp or battery voltage drops to a critical point then the FBH cuts out still leaving you with enough power in the battery to start the car, I tested that out by accident last year when having been working on the car the day before with out the battery charger on I stood near the back door pressing remote fob to switch it on and no FBH firing up but when I did go to start the car 10 mins later it started ok but I knew the battery was down. Right not saying this next bit too loud but pulled Fbh fuse to reset it and (drum roll) pressed remote and it fired up ! left it to do its thing for 10 mins and didnt cut out now if it works again in the morning is any bodies guess.

IMO that when 12v is applied to the FBH the FBH wakes up the cars ECU's so it can switch on the heater fans and move the vents to up.

Glad yours is working.

backinblack said:

IMO that when 12v is applied to the FBH the FBH wakes up the cars ECU's so it can switch on the heater fans and move the vents to up.

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Yup, and tell the FBH to get up & get dressed.

backinblack said:

IMO that when 12v is applied to the FBH the FBH wakes up the cars ECU's so it can switch on the heater fans and move the vents to up.

Glad yours is working.

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So am I but no doubt it wont last, bound to end in tears.

Devilish said:

Yup, and tell the FBH to get up & get dressed.

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And it had just finished getting dressed as we pulled up in Morrisons car park this morning,as I lock the car I could hear it winding down. Wondering if it didnt like it couple of weeks ago when I had start and move car couple of times but it was only running maybe 30/40 seconds before switching of again then not moved for 2 or 3 days so FBH never really had time to get going.

@backinblack do I remember seeing somewhere yours is the later touch screen or am I wrong again like herindoors keeps telling me, believe the FBH is controlled a little different then.

@kds yes mines a touch screen

@kds from what I can gather the DSP tells the ACL via the MOST to tell the FBH to get up and get dressed via the WBUS and the FBH says FU i'm going back to sleep

backinblack said:

@kds from what I can gather the DSP tells the ACL via the MOST to tell the FBH to get up and get dressed via the WBUS and the FBH says FU i'm going back to sleep

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PMSL

Devilish said:

PMSL

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I had to google that as it's not in the RAVE manual.

backinblack said:

@kds from what I can gather the DSP tells the ACL via the MOST to tell the FBH to get up and get dressed via the WBUS and the FBH says FU i'm going back to sleep

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By hell thats a lot of abbreviation to take in lol, is there any info on DISCO4.COM forum, there is a whole section on the webasto fbh on there about it and how its controlled, just a thought.

Just looking at one of these to fire the FBH if I get it working this weekend, pretty sure the Telestart is knackered.

Devilish said:

PMSL

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So did I thats why its taken me so long to reply !

kds said:

By hell thats a lot of abbreviation to take in lol, is there any info on DISCO4.COM forum, there is a whole section on the webasto fbh on there about it and how its controlled, just a thought.

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I think LR went back to a more basic setup later on and ditched the WBUS.

The start stop such as moving the vehicle, or on/off the drive, will not cause electronic damage, every time the start signal is cut, the PCB will just shut down and reset. But the combustion chamber does not get chance to get hot enough to produce carbon dioxide & water before it starts shut down, so it produces more soot. Insignificant, but it is there over time. That is why I install a switch with a LED in the cabin, wired in series to the ambient temp start pin, so I can open the circuit if I do not want the FBH to start when I start the engine.

That's me done good night

backinblack said:

Just looking at one of these to fire the FBH if I get it working this weekend, pretty sure the Telestart is knackered.

Amazon product

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So are you back to bridging pins 1 and 3 on receiver plug with that then, I used Vellman 2 channel remote you can set each channel to either pulse or timed, I have one channel set for 15 minuets on and the other 30 minuets.

Yes just a simple on off will do. Thinking of rewiring the FBH to the aux battery in the boot anyway.

backinblack said:

Yes just a simple on off will do. Thinking of rewiring the FBH to the aux battery in the boot anyway.

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I have done the second battery thing so I can watch tv while herindoors just has to nip into thisthatandevery shop without thinking will it start after couple of hours.