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TJ101



Member Since: 30 May 2007
Location: Taunton Somerset
Posts: 3605

Isle Of Man 2015 Defender 110 Puma 2.2 XS CSW Montalcino Red
TD5 Driver Demand

Picked up a base for a new project 2004/5 Bog spec 90 Td5, Very clean, well maintained

First Issue

On the drive home, after 20 miles, engine dies and mil light on,, only got tick over, no throttle response, so recovery job home Shocked

All test's and system scans point to the throttle unit,, so new genuine one ordered

Spoke to vendor, and it would seam, he has the same issue, back in August, and also fitted a new gen unit, 90's now done about 900 miles since

Fitted new unit today, and now have throttle response, BUT, a bad flat spot/hesantance , which struggles to drive through, even with light or heavy throttle load ? which was not there on the first 20 mile on old unit
Fitted the old (August ?) unit, and its back to driver demand fault, no throttle response

So ideas ?? Modul plug ? Loom, back to ECU ?

It due out tomorrow night, as recovery for the Exeter Trail !! California F1, RR TDV8 VogSE, 90 V8 Hybrid, 55 Series 1

www.wessex4x4response.org.uk

Post #748981 3rd Jan 2019 8:10pm
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 4331

United Kingdom 2006 Defender 110 Td5 SW Epsom Green

Could be a break in the throttle cable (sorry... "driver demand") cable.

If you've got a nanocom (and I assume other devices read the same data) there are 2 or 3 signal wires coming off of the pedal (Depending on it's age... early ones were 2 track, later 3 track), the nanocom should read the voltage off of them... 0-5v on one, 5-0v on the other (depending on where the pedal is in its range of movement..ie, foot OFF the pedal... tickover... one track will show 0v, other will show 5v (And on the 3 track system, I'm not sure what the 3rd one shows, between 0 and 5v but I don;t know which way)).. the ECU then sorts it out and gives a relative throttle position for the engine.

anyway.... maybe one of these are duff? on a separate note... wifes suzuki vitara, 2.0D from 2003... had a similar thing; had 3 or 4 complete pedal assy's changed over the years until I kicked up a fuss at the dealers, and suddenly a "repair" harness appeared from Japan. apparently there was a break/fault/Geishi doll stuck in the vehicle wiring harness causing the fault.

Could be a break in the Td5 loom (or a Brummie eating a pasty)...

Post #748996 3rd Jan 2019 8:41pm
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lightning



Member Since: 23 Apr 2009
Location: Stockport
Posts: 458

United Kingdom 

Oil in the ECU, wiring loom?
I am guessing the injector harness has been replaced. Is there any oil showing at the ECU red plug?

Post #749004 3rd Jan 2019 8:59pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 3555

2006 Defender 110 Td5 USW Zermatt Silver

Loom from pedal to ECU. I’ve done a few of them.

Post #749016 3rd Jan 2019 9:12pm
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mk1collector



Member Since: 17 Sep 2009
Location: huddersfield
Posts: 6297

England 2004 Defender 110 Td5 CSW Bonatti Grey

Check for oil in ecu plug and unplug the MAF and drive around to see if the power comes back. Ray
My build thread
http://www.defender2.net/forum/topic17615.html

Post #749031 3rd Jan 2019 9:31pm
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TJ101



Member Since: 30 May 2007
Location: Taunton Somerset
Posts: 3605

Isle Of Man 2015 Defender 110 Puma 2.2 XS CSW Montalcino Red

Thanks all Very Happy

I am thinking loom, the "flat spot/hesantance" is about one third throttle , so am suspecting that wire ? will check them all back to the ECU for continuity tomorrow morning

Not sure why, the unit fitted in August failed ?? it certainly does not work, or give the figures you quote Jamie !!

Symptoms aren't the "oil on injector loom" lighting . all Driver Demands , plus the odd AC, and Tacho drive ! but i did check the loom into ECU for oil, as i sat beside the road, Shocked as first thought !!

I presume you just make up a new loom Andy ? 7 core trailer cable ? California F1, RR TDV8 VogSE, 90 V8 Hybrid, 55 Series 1

www.wessex4x4response.org.uk

Post #749036 3rd Jan 2019 9:39pm
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 3555

2006 Defender 110 Td5 USW Zermatt Silver

Yes. Just used trailer wire as you say. Not a bad job to do, as long as you can keep warm enough to feel your fingers.

Post #749039 3rd Jan 2019 9:43pm
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jst
Site Supporter


Member Since: 14 Jan 2008
Location: Taunton
Posts: 5117

2011 Defender 110 Puma 2.4 USW Stornoway Grey

As before, I wouldn't bother looking for wire break, just replace all with multi core wire. Now have backup for tomorrow so soft top available, home 1900, ring if require it. Cheers

James

www.4x4adventures.co.uk
Off Road Driver training @ David Bowyers Centre
110 XS Utility
90 tdci Softtop
90 tdci Hardtop

Post #749085 4th Jan 2019 6:48am
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bankz5152



Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 1235

2004 Defender 110 Td5 DCPU Epsom Green

I would change the Crank Sensor (genuine only) and the MAP sensor (gen only). Both can cause the issues you describe. Just because the throttle input seems off doesnt always mean it is the thottle itself. Garage Clear Out
http://www.defender2.net/forum/topic62959.html

Post #749095 4th Jan 2019 8:15am
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TJ101



Member Since: 30 May 2007
Location: Taunton Somerset
Posts: 3605

Isle Of Man 2015 Defender 110 Puma 2.2 XS CSW Montalcino Red

Well, Fingers crossed sorted

Replaced pedal socket and loom,, all good to go now,,
Question is ? why 2 pedals in 6 months , the August one certainly does not work, have the feeling the loom may have been the problem back then ?
But would the loom "burn" out the august unit ? As it was fitted by previous owner ? can only speculate

Thanks for the input guys California F1, RR TDV8 VogSE, 90 V8 Hybrid, 55 Series 1

www.wessex4x4response.org.uk

Post #749110 4th Jan 2019 10:39am
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 3555

2006 Defender 110 Td5 USW Zermatt Silver

I can only assume that the damaged loom puts electrical spike, or voltage the wrong way into the pedal potentiometer.

They can be a long on going problem, one I fixed was a problem over a year and initially only occurred when puddles had been driven through.

Bloody quick work done there. Well done, which I could get my arse in gear to sort my Defender out.

Post #749113 4th Jan 2019 11:02am
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excossack



Member Since: 22 Feb 2012
Location: North West
Posts: 3952

United Kingdom 1999 Defender 110 Td5 SW Caledonian Blue

TJ101 wrote:
Well, Fingers crossed sorted

Replaced pedal socket and loom,, all good to go now,,
Question is ? why 2 pedals in 6 months , the August one certainly does not work, have the feeling the loom may have been the problem back then ?
But would the loom "burn" out the august unit ? As it was fitted by previous owner ? can only speculate

Thanks for the input guys


Is this pedal loom available as a separate part? 1999 Defender TD5 110

Regards
John 2E0DHN
Do you know what a nemesis is?

Post #749125 4th Jan 2019 11:45am
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TJ101



Member Since: 30 May 2007
Location: Taunton Somerset
Posts: 3605

Isle Of Man 2015 Defender 110 Puma 2.2 XS CSW Montalcino Red

No,, Part of the engine loom,, so the dealer says,, Plugs on the bay of E

It had to be sorted by today,, Recovery duties this evening !

I did say fingers crossed !! California F1, RR TDV8 VogSE, 90 V8 Hybrid, 55 Series 1

www.wessex4x4response.org.uk

Post #749131 4th Jan 2019 11:59am
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landy andy



Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 3555

2006 Defender 110 Td5 USW Zermatt Silver

Buying the plug must make it a bit easier and save a bit of time. Will remember that for next time. I’ve always cut the loom at both ends and reused plug and 6” of loom. Much prefer your method.

Post #749132 4th Jan 2019 12:02pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 9307

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

TJ101 wrote:
...
Question is ? why 2 pedals in 6 months , the August one certainly does not work ...


Britpart ?

Post #749134 4th Jan 2019 12:04pm
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