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Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6286

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
F40
F40 .....no not the plane but the 5a fuse (f40 - under the steering wheel)

can anyone tell me exactly what it does (but in lay terms) - I know it relates to the ecu but so do a couple of others so I can't imagine they all power the ecu?

the reason for asking is as some of you will be aware I've been having problems with my car since day one and having gone through all the fuses I found none had blown as it was suggested I check but......

the ABS fuse was I believe loose (but can't say for sure) and

fuse F40 was no where to be seen Shocked


any thoughts ?
Post #154604 9th Jul 2012 9:23pm
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Shax



Member Since: 05 Oct 2010
Location: London
Posts: 391

England 2010 Defender 90 Puma 2.4 XS CSW Stornoway Grey
I've just been through the electrical service book, and F40 doesn't seem to be used.... A couple of Mega Fuse 400 amp fuses shown, but no F40 or Fuse 40....

If you want the electrical PDF's just holler and I'll email them to you. ... ,-------,
.. I [__][_]|__
.. I __ |"_|"__|
.. "(o)====(o)"
^^_-^-_^-^_^^^^^--^^^^
PAUL
G7ALW 14.200 USB
26FB458 / 27.275 SSB
Post #154614 9th Jul 2012 10:24pm
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ZeDefender



Member Since: 15 Sep 2011
Location: Munich
Posts: 4731

Germany 2011 Defender 110 Puma 2.4 SW Baltic Blue
I managed to blow my ECU fuse when (mis)wiring my speed unlimiter - had some bizarre effects until I realised what I'd done. Thank God there IS a fuse there Shocked
Not F40 though... Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...
Post #154615 9th Jul 2012 10:25pm
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Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6286

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
My fuse box (from memory) suggests 3 no fuses for the engine......(ECU I presume going by the little pictogram - an engine / gearbox with a stike of lightning through it).

a red fuse (20A ?) and 2no 5amp.

should I simply try putting a 5amp fuse in there or are we sure its not needed.....all the other locations are clearly marked as spare (when they are spare of course) so I'm suprised this isn't maked as spare if it is?
Post #154656 10th Jul 2012 8:06am
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dgardel



Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586

Italy 
Re: F40
Caterham wrote:
F40 .....no not the plane but the 5a fuse (f40 - under the steering wheel)

can anyone tell me exactly what it does (but in lay terms) - I know it relates to the ecu but so do a couple of others so I can't imagine they all power the ecu?

the reason for asking is as some of you will be aware I've been having problems with my car since day one and having gone through all the fuses I found none had blown as it was suggested I check but......

the ABS fuse was I believe loose (but can't say for sure) and

fuse F40 was no where to be seen Shocked


any thoughts ?



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 Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License
Post #154664 10th Jul 2012 8:39am
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Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6286

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
Embarassed

yes you're right F16 is plane
F40 is car (but goes like a plane - hence my confusion)

now....any thoughts on my fuses Very Happy
Post #154665 10th Jul 2012 8:43am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17248

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Re: F40
Caterham wrote:
F40 .....no not the plane but the 5a fuse (f40 - under the steering wheel)

can anyone tell me exactly what it does (but in lay terms) - I know it relates to the ecu but so do a couple of others so I can't imagine they all power the ecu?

the reason for asking is as some of you will be aware I've been having problems with my car since day one and having gone through all the fuses I found none had blown as it was suggested I check but......

the ABS fuse was I believe loose (but can't say for sure) and

fuse F40 was no where to be seen Shocked


any thoughts ?


Interesting comment (highlighted above). On my 07 every single fuse in the fusebox under the column was loose, and there was factory fit Sellotape over it to stop them falling out! When I removed the tape, the whole lot came out stuck to the tape.

I spent about half-an-hour with a pair of long nose pliers putting a small kink in both legs of every fuse then reinserting them, since when they have been fine. So if you are having strange electrical problems it might be worth checking.

I had forgotten this till reading your post. A £25k vehicle and the fuses just fall out! Landrover, got to love 'em!
Post #154686 10th Jul 2012 9:57am
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Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6286

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
blackwolf...for now over to your post re; abs / engine management
Post #154869 10th Jul 2012 9:34pm
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wslr



Member Since: 18 Jul 2010
Location: Wellington, Somerset
Posts: 581

United Kingdom 
Shax is right. No function for F40.

F39 is the feed to the MAF/IAT and F41 is ECU feed. No mention of F40 as far as I can find on the Electrical Wiring Diagrams on TOPIx.
Post #154897 10th Jul 2012 11:24pm
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Caterham



Member Since: 06 Nov 2008
Location: Birmingham
Posts: 6286

England 2011 Defender 110 Puma 2.4 XS CSW Stornoway Grey
thanks guys - I guess that puts that to bed

Thumbs Up
Post #154913 11th Jul 2012 7:28am
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