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Dave-H



Member Since: 08 Feb 2011
Location: Surrey
Posts: 1507

England 2007 Defender 90 Puma 2.4 HT Tonga Green
Puma fuel gauge stopped working
So the fuel gauge packed up Sunday, a warning 'pinging' noise accompanied by the needle on zero and the fuel light on ... Knew i had qtr tank but stuck another 30 in just to be sure Mad

Was hoping it was a glitch, but 3 days later it's still the same ...



Is there a 'known' common problem, or is the tank going to need removing??? Guns and Landrovers .... anything else is irrelevant.
Post #609480 14th Mar 2017 8:20pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16812

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
I'm not aware of it being a common problem and would be checking the wiring for continuity and earths before dropping the tank to access the sender. Be prepared for the vehicle to implement its low fuel strategy and misfire and eventually refuse to restart if it thinks it has no fuel, by the way. Eventually it will become undrivable even with fuel in the tank if it thinks it has no fuel.
Post #609522 14th Mar 2017 10:28pm
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Dave-H



Member Since: 08 Feb 2011
Location: Surrey
Posts: 1507

England 2007 Defender 90 Puma 2.4 HT Tonga Green
Thanks for that Blackwolf Thumbs Up

Drives fine at the moment, not missing a beat [hope it stays that way until time allows repair] Crying or Very sad Guns and Landrovers .... anything else is irrelevant.
Post #609687 15th Mar 2017 7:38pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16812

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
It would be interesting if you could let us know if you do get any odd effects running like this. If the LR published information is correct, it should begin by inducing a simulated "fuel starvation" misfire, which will clear on cycling the ignition for a few times, then persist, and ultimately then inhibit engine start to prevent the system completely running out.

I don't know if it is clever enough to determine that a sudden transition from plenty of fuel to zero fuel can only be due to a fault (or, I suppose, theft) and therefore inhibit the strategy, or if it will assume that you're running out and behave as predicted.
Post #609742 15th Mar 2017 10:37pm
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Dave-H



Member Since: 08 Feb 2011
Location: Surrey
Posts: 1507

England 2007 Defender 90 Puma 2.4 HT Tonga Green
I will Thumbs Up

It's going to be a good while before it gets looked at so we'll soon know Laughing Guns and Landrovers .... anything else is irrelevant.
Post #609937 16th Mar 2017 9:01pm
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Dave-H



Member Since: 08 Feb 2011
Location: Surrey
Posts: 1507

England 2007 Defender 90 Puma 2.4 HT Tonga Green
73 miles later and It's still driving as it should Cool

Does this point towards the sender unit being fine and It's more likely a gauge/wiring issue?? Guns and Landrovers .... anything else is irrelevant.
Post #610681 19th Mar 2017 7:44pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
Have you checked the plug on the rear of the IPAC is secure? Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #610686 19th Mar 2017 7:54pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16812

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Steve makes a good point, perhaps the issue is at the IPAC not the sender or ECU. If it is a sender fault and the ECU thinks the tank is empty, I am very surprised that it is still running.

It would be interesting to hook up a diagnostic tool and see what fuel level the ECU is reporting. If it is not empty, it points to an IPAC problem.
Post #610774 19th Mar 2017 11:10pm
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Dave-H



Member Since: 08 Feb 2011
Location: Surrey
Posts: 1507

England 2007 Defender 90 Puma 2.4 HT Tonga Green
I did unplug the cluster for a few minutes and re-connected [just in case] Also disconnected the battery for 10 minutes ... both made no difference.

I don't have any diagnostic tools good enough for that sort of info on a Defender ... Crying or Very sad

I'm with the Bro in law at the weekend, I assume I can temporarily swap the ipac for his one just to see if gauge works Blackwolf? Or are they specifically programmed to each individual vehicle's ecu?

Ta Guns and Landrovers .... anything else is irrelevant.
Post #610899 20th Mar 2017 4:42pm
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554


Click image to enlarge




Click image to enlarge


with your ins cluster unplug you also can comm check wiring and fuel tank sender with multimeter



Click image to enlarge



Plug C0390- pin 11 and pin 10

Plug C0114 - pin 1 / 2 is the one on top fuel tank


Last edited by dorsetsmith on 20th Mar 2017 5:50pm. Edited 2 times in total
Post #610909 20th Mar 2017 5:17pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16812

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Since the IPAC is an integral part of the security sytem (with the AS10 and ECM) I doubt you can just swap one over, unfortunately.
Post #610911 20th Mar 2017 5:23pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
I was going to suggest a manual check, just thought checking the plug for the IPAC would be best to try first.

The diagram makes that task all the better. Thumbs Up Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #610912 20th Mar 2017 5:24pm
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Dave-H



Member Since: 08 Feb 2011
Location: Surrey
Posts: 1507

England 2007 Defender 90 Puma 2.4 HT Tonga Green
Had a very quick look yesterday.
IPAC is fine, gauge works if plugged into bro in law's puma, his IPAC doesn't work in mine.

Assume It's not sender unit [As vehicle is still driving faultlessly] so that only leaves a wiring issue somewhere [I feckin HATE wiring issues!]

It can stay like that til I can be bothered .... Evil or Very Mad Guns and Landrovers .... anything else is irrelevant.
Post #612230 26th Mar 2017 11:10am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
Could possibly be debris damage from underneath.
Hopefully it's not directly near the fuel tank. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #612231 26th Mar 2017 11:27am
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dorsetsmith



Member Since: 30 Oct 2011
Location: South West
Posts: 4554

With the IPAC unplugged
check wiring in stages i.e. from your IPAC to the engine bay chassis harness plug with multimeter to start with, next chassis harness plug to driver side rear wheel arch not plug I no will have to unwrap harness and find two wires green / orange 0,75 and yellow / purple 0,75. I have used pins and the multimeter con check end to end both wires if ok at this point your wiring problem from hear to tank or the sender

Using pins and the multimeter con check across the two wires see if you get reading i.e. fuel tank sender
Post #612239 26th Mar 2017 11:58am
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