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Fuel tank sender acess
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v8bobber
 


Member Since: 20 Sep 2010
Location: pembrokeshire, wales
Posts: 95

Wales 2015 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4
Fuel tank sender acess

Hi all,

I’m getting an intermittent problem where the low fuel warning light comes on / fuel gauge shows empty. I suspect it’s dodgy connections somewhere.

Can I access the pump / sender from inside or is it a tank out job
  
Post #216082514th Jul 2020 12:14 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 5065

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

There's no access panel so it's tank out I'm afraid. Big Cry

Do a diagnostic check first just in case there's anything logged which might not necessitate dropping the tank.
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #216082614th Jul 2020 1:48 am
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Pedros
 


Member Since: 25 Jun 2011
Location: Cumbria
Posts: 454

United Kingdom 2010 Discovery 4 3.0 TDV6 XS Auto Santorini BlackDiscovery 4

Got the same problem, intermittently. I also believe the tank has to be dropped to get to the offending connectors. Apart from dropping the tank, it's an easy fix. But it takes a while to do the tank dropping thing. Again, I believe, it'll probably be around £150, most of that being labour. But keep an eye on it, if it becomes a "hard" problem (not intermittent) the car supposedly thinks it'll be not good to run out of fuel eventually and stops working. Shall have to get around to it sometime soon.
  
Post #216115915th Jul 2020 1:08 pm
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v8bobber
 


Member Since: 20 Sep 2010
Location: pembrokeshire, wales
Posts: 95

Wales 2015 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

Mines behaved itself since but only done a few miles. It is usually just the connectors or is it a case of needing to renew the sender assembly too
  
Post #216126916th Jul 2020 12:19 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 5065

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Diagnostics should answer that question which is why I suggested this first. If it comes back "open circuit - short to ground" it's likely wiring / connector. If it refers to specific tank component anomaly its more likely the sender. You can easily test it once the tank is opened, just pull the fuel pump fuse.
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #216127016th Jul 2020 12:39 am
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v8bobber
 


Member Since: 20 Sep 2010
Location: pembrokeshire, wales
Posts: 95

Wales 2015 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

I put the nanocom on it this evening when I finally had 5 minutes to myself.

Nothing that relates to the sender at all
  
Post #216157917th Jul 2020 1:23 am
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v8bobber
 


Member Since: 20 Sep 2010
Location: pembrokeshire, wales
Posts: 95

Wales 2015 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

I put the nanocom on it this evening when I finally had 5 minutes to myself.

Nothing that relates to the sender at all
  
Post #216158017th Jul 2020 1:23 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 5065

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Did you get any codes? If so what are they??
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #216158117th Jul 2020 1:24 am
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v8bobber
 


Member Since: 20 Sep 2010
Location: pembrokeshire, wales
Posts: 95

Wales 2015 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

The only one I had which I hadn’t seen before was code B1D17:bus circuit / battery backed sounder (historic) component failure.

Apart from that it was minor stuff such as light sensor / wipe sensor intermittent faults
  
Post #216158217th Jul 2020 1:38 am
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 5065

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

In the absence of anything specific it looks as if you'll have to bite the bullet. Get as much fuel out of the tank as possible which will make it easier to handle. Most of the pipework can stay with it but obviously not the filler.

The feed, return, and webasto lines can be disconnected near the fuel filter. If you don't have a lift you can loosen the cradle bolts and slide small ratchet straps between the tank and the cradle supporting it between the chassis rails. Then completely unbolt and move the cradle out of the way, and gently lower the tank. Once open you can move the sender by hand to see if the dash responds correctly. BUT, remove the lpfp fuse/relay to prevent unwanted fuel spillage! Thumbs Up

If you're up for it I would advise cleaning the gauze pick up on the bottom of the pump as well, as this becomes clogged over time. Brake cleaner (lots of) will get it clean again.
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #216158417th Jul 2020 2:40 am
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v8bobber
 


Member Since: 20 Sep 2010
Location: pembrokeshire, wales
Posts: 95

Wales 2015 Discovery 4 3.0 TDV6 HSE Auto Santorini BlackDiscovery 4

Are you recommending changing the sender or just sorting the connections. I haven’t had the problem again (since Monday) but no doubt it will return
  
Post #216169817th Jul 2020 12:51 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 5065

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

If you have gone to the trouble of dropping and opening the tank. It would perhaps be sensible to change it unless you find a wiring issue.
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #216170217th Jul 2020 1:14 pm
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Pedros
 


Member Since: 25 Jun 2011
Location: Cumbria
Posts: 454

United Kingdom 2010 Discovery 4 3.0 TDV6 XS Auto Santorini BlackDiscovery 4

Do keep us informed how you get on, whether you do it yourself or not as no doubt I'll be going down the same route.
  
Post #216199418th Jul 2020 9:16 pm
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Flack
 


Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 6313

England 2007 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3

Its a known problem with the connection's in the tank, just cut the small black connector out and solder the wires. LR do a kit but its a waste of time and money.

Flack Thumbs Up
  
Post #216203119th Jul 2020 8:08 am
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sasdiscos
 


Member Since: 22 Feb 2013
Location: Northants
Posts: 889

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Bali BlueDiscovery 4

See my post here.

https://www.disco3.co.uk/forum/discovery-4...78913.html
 You remind me of a younger me, not much younger mind...perhaps even a little older!  
Post #216205719th Jul 2020 10:23 am
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