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Fbh not working - diagnostic help !
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vizlauk
 


Member Since: 30 Jan 2023
Location: Northumberland
Posts: 22

United Kingdom 2005 Discovery 3 TDV6 S Manual Bonatti GreyDiscovery 3

cheers for that help ! hard to get a good screenshot in the dark using a laptop & mobile phone - any info on the operating state - OFF state ? is that locked or normal ? I will get a check tomorrow to see if the fuel pump is fitted or if it has been removed - i have sourced a working pump if it is missing ! As stated, this is a replacement fbh that i stripped & cleaned lastnight & fitted this morning - the same results with this unit as the original unit - thats why im thinking the fuel pump may have been removed.
  
Post #23250341st Feb 2023 9:08 pm
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Flatlander
 


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Last edited by Flatlander on 21st Feb 2023 10:14 pm. Edited 1 time in total 
Post #23250371st Feb 2023 9:29 pm
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vizlauk
 


Member Since: 30 Jan 2023
Location: Northumberland
Posts: 22

United Kingdom 2005 Discovery 3 TDV6 S Manual Bonatti GreyDiscovery 3

I will do the checks tomorrow & see what that leads to.
Thanks Again.
  
Post #23250401st Feb 2023 9:37 pm
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Martin
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Member Since: 06 Nov 2004
Location: Hook Norton
Posts: 18440

United Kingdom 2006 Discovery 3 TDV6 SE Manual Buckingham BlueDiscovery 3

"Off" state is normal until it is running...

Use the "Parking Heating" button (arrow pointing to a large flame) to try and start it up.

Or Control menu -> Parking Heating

Then you can watch the FBH go through its start up (and hopefully run) procedure in the "Overview" panel.
 06 D3 SE / 15 LR D90 XS SW / 88 LR 90 Td5 / 68 BMW 2000 ti
Any issues with the site let me know! 
 
Post #23250461st Feb 2023 10:01 pm
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vizlauk
 


Member Since: 30 Jan 2023
Location: Northumberland
Posts: 22

United Kingdom 2005 Discovery 3 TDV6 S Manual Bonatti GreyDiscovery 3

Thanks for that, it won't allow any start-ups !
  
Post #23250491st Feb 2023 10:10 pm
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vizlauk
 


Member Since: 30 Jan 2023
Location: Northumberland
Posts: 22

United Kingdom 2005 Discovery 3 TDV6 S Manual Bonatti GreyDiscovery 3

vizlauk wrote:
I will do the checks tomorrow & see what that leads to.
Thanks Again.


Done some tests this morning, 12.87v on the supply, water pump working fine, 2.67v & 2.33v with ignition on from pin 4 & 7 - no fuel via the blue & white wire ! Done a scan with the gap iid tool which is attached, I'm going get underneath the discovery & see if the fuel pump is present as my original thought is it could be missing ! Would an open circuit on the fuel pump cause this error !
Screenshot attached from my iid tool.

  
Post #23254535th Feb 2023 10:39 am
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Flatlander
 


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Last edited by Flatlander on 21st Feb 2023 10:15 pm. Edited 1 time in total 
Post #23254665th Feb 2023 12:19 pm
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vizlauk
 


Member Since: 30 Jan 2023
Location: Northumberland
Posts: 22

United Kingdom 2005 Discovery 3 TDV6 S Manual Bonatti GreyDiscovery 3

Just been underneath & removed the fuel pump, fitted the fully working one i have, also tested the original that was also working fine, tried to prime the webasto with the blue & white wire ! no fuel - found the fuel line is not connected - its floating under the water pipes in the engine bay, easy to re-connect it looks like it should connect on the n/s air strut ? but still no further forward ?
  
Post #23254695th Feb 2023 12:29 pm
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Flatlander
 


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Last edited by Flatlander on 21st Feb 2023 10:15 pm. Edited 1 time in total 
Post #23254715th Feb 2023 12:54 pm
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vizlauk
 


Member Since: 30 Jan 2023
Location: Northumberland
Posts: 22

United Kingdom 2005 Discovery 3 TDV6 S Manual Bonatti GreyDiscovery 3

ive got fuel up to the fuel pipe where its been disconnected, found that by the leak on the floor after blowing down the pipe ! thats how i found that it was disconnected down below the inlet for the fbh !
  
Post #23254725th Feb 2023 1:04 pm
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Flatlander
 


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Last edited by Flatlander on 21st Feb 2023 10:15 pm. Edited 1 time in total 
Post #23254735th Feb 2023 1:07 pm
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vizlauk
 


Member Since: 30 Jan 2023
Location: Northumberland
Posts: 22

United Kingdom 2005 Discovery 3 TDV6 S Manual Bonatti GreyDiscovery 3

it still wont let me activate it ? cant even find the fuel prime etc using the gap iid tool ?
  
Post #23254745th Feb 2023 1:16 pm
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Flatlander
 


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Last edited by Flatlander on 21st Feb 2023 10:15 pm. Edited 1 time in total 
Post #23254755th Feb 2023 1:20 pm
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vizlauk
 


Member Since: 30 Jan 2023
Location: Northumberland
Posts: 22

United Kingdom 2005 Discovery 3 TDV6 S Manual Bonatti GreyDiscovery 3

i didnt test the ground side of the power connection ! the replacement unit i took of another land rover discovery (a newer vehicle), bet it is the same model unit
  
Post #23254765th Feb 2023 1:28 pm
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Flatlander
 


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Last edited by Flatlander on 21st Feb 2023 10:16 pm. Edited 1 time in total 
Post #23254795th Feb 2023 1:33 pm
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