 | Home > Td5 > Driver demand problem 1 fault |
 
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| MadTom Member Since: 10 Sep 2013 Location: Olomouc Posts: 616   
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Driver demand is the gas pedal. Look into lived data with non running engine and ignition on - when slowly pressing down the gas pedal, two driver demand voltages should change continuously, without any sudden changes. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo
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1st Apr 2024 7:35pm |
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| Phil68 Member Since: 30 Jun 2023 Location: Accrington Posts: 11 
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Thanks Tom
In nanocom where would I find that data? |
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1st Apr 2024 8:04pm |
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| 34064 Member Since: 12 Dec 2023 Location: South Central Posts: 177 
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Instrument view towards the back pages will show you the track for the throttle 110 Td5 Ex Utilities slowly converting into a pop top camper one day
Build thread:https://www.defender2.net/forum/post1024784.html#1024784 |
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1st Apr 2024 8:26pm |
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| Phil68 Member Since: 30 Jun 2023 Location: Accrington Posts: 11
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Great thanks
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1st Apr 2024 8:27pm |
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| Phil68 Member Since: 30 Jun 2023 Location: Accrington Posts: 11
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OK did some testing today.
Plugged in the nanocom went to the Accelerator page which had 4 boxes Accel 1, Accel 2, Accel 3, Accel voltage. I'm guessing this is the 3 track type?? Anyhow turned ignition to on - slowly pressed the accelerator and Accel 1 went from 0.857 up to 4.87 not sure of the exact figures or what Accel 2 and 3 are measuring? Voltage feed was over 5 volts. Went for a drive different story, Accel 1 didn't want to go over 3.2 volts and dropped voltage when accelerating got back home turned of the engine slowly pressed the pedal and it stopped at 3.2 volts. Turned off the vehicle reset everything turned back on slowly pressed the pedal and Accel 1 went upto 4.87 volts? Looking at the pedal is there a cover missing? I inspected the the wires the best I could but I saw nothing obvious the wires then disappear into the loom. I'm still thinking I need a replacement but getting this part looks difficult it seems to be on back order everywhere. I'm thinking of a second hand part for now does anyone know where I can get this part. Landrover defender 110 2003 td5 is my vehicle. Thanks hope this all makes sense |
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2nd Apr 2024 5:53pm |
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| NickMc Member Since: 01 Oct 2014 Location: Norn Iron Posts: 1624  
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More than likely the wiring to the pedal than the actual pedal, common enough fault. I would have pedals if you need one though. Some are what the call 2 track and some are 3 track, you can change this in diagnostics though.
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3rd Apr 2024 12:53am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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This is like dejavu Phil68
 Replied to your other post  |
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3rd Apr 2024 7:03am |
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| MadTom Member Since: 10 Sep 2013 Location: Olomouc Posts: 616
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Two way gas pedal - supply voltage approx. 5 V, track 1 + track 2 = supply voltage, track 1 voltage is rising when gas pedal is pressed down, track 2 voltage is lowering. Track 3 is there only to help, just switch to 2 way gas pedal in engine settings (next to injector codes), to eliminate (for test only) the track 3.
Voltage range should be 0,5 to 4,5 V approx., and withnout any sudden changes - it must change smooth when pressing or releasin the gas pedal. Any problem with gas pedal results in idle RPM only - this is security feature of engine ECU. When ECU is not 100% sure in what position the gas pedal is, it just switches to safe response, running engine only on idle RPM. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo |
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3rd Apr 2024 7:11am |
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| mturri Member Since: 13 Jul 2010 Location: All over Posts: 33  
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As noted, historically issues with accelerator output signal are related to the wiring loom and not the TPS (Throttle Position Sensor) itself.
The solution, a lot less financially impacting than a replacement TPS, though more labour intensive, is an 'electrical bypass' by way of an overlay harness. A DIY job. Can source a TPS connector kit and ECU connector terminals from PaulMc, a valued member of this forum, who also happens to offer these items on fleabay: https://www.ebay.co.uk/itm/161471327339 https://www.ebay.co.uk/itm/165540997395 Respectively:  Click image to enlarge Click image to enlarge There is a pre-wired version of the TPS connector on offer, saves some of the work, but the long term reliability of the wire splicing is questionable at best. For reference on TPS science: Click image to enlarge Click image to enlarge Cheers Matt 24 yrs of Td5 ownership D110 Td5 MY06 fully tuned up ex-D2 Td5 MY04 Auto ex-D110 Td5 MY00 ex-D2 Td5 MY00 ex-D2 Td5 MY99 ex-D1 300Tdi MY89 ex-D90 200Tdi MY87 |
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3rd Apr 2024 11:59am |
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| mturri Member Since: 13 Jul 2010 Location: All over Posts: 33
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For the sake of completeness, a simplified wiring schematic for the TPS-to-ECU overlay harness, plus pinout diagrams of the involved connectors.
Click image to enlarge Click image to enlarge Click image to enlarge Enjoy! Matt 24 yrs of Td5 ownership D110 Td5 MY06 fully tuned up ex-D2 Td5 MY04 Auto ex-D110 Td5 MY00 ex-D2 Td5 MY00 ex-D2 Td5 MY99 ex-D1 300Tdi MY89 ex-D90 200Tdi MY87 Last edited by mturri on 3rd Apr 2024 2:01pm. Edited 1 time in total |
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3rd Apr 2024 12:30pm |
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| mturri Member Since: 13 Jul 2010 Location: All over Posts: 33
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As it turns out the above is for the 'Export' model i.e. LHD.
For the RHD version the TPS connector is C0787: Click image to enlarge And the wiring schematic (no changes other than connector name): Click image to enlarge 24 yrs of Td5 ownership D110 Td5 MY06 fully tuned up ex-D2 Td5 MY04 Auto ex-D110 Td5 MY00 ex-D2 Td5 MY00 ex-D2 Td5 MY99 ex-D1 300Tdi MY89 ex-D90 200Tdi MY87 |
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3rd Apr 2024 2:00pm |
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| Phil68 Member Since: 30 Jun 2023 Location: Accrington Posts: 11
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OK thanks guys,
I think a new overlay harness is my next step explained very nicely in the link. https://www.landrovermonthly.co.uk/article...pedal-fix/ |
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3rd Apr 2024 3:18pm |
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| balmybaldwin Member Since: 17 Apr 2021 Location: Surrey Posts: 192 
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Can you be more specific with your symptoms? When this occured do you lose power to the extent it won't go beyond idle or is it more like a "Limp mode" that responds to the accelerator, but not very well?
I'm getting the latter symptom particularly on a long hill where the car responds normally until suddenly it doesn't (feels like a limp mode and then can't maintain more than about 60mph. As far as I can tell this is not pedal related as my numbers look normal on the nanocom. I'm yet to look at the wastegate, but a new MAF didn't fix it (old one was def faulty). |
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3rd Apr 2024 5:46pm |
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| Phil68 Member Since: 30 Jun 2023 Location: Accrington Posts: 11
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Have a look at the link below
https://www.landrovermonthly.co.uk/article...pedal-fix/ It's more like a limp mode you get to about 60 I only get to 50mph but I guess its the revs not the speed. If yours is a defender td5 then the above link fix is well worth trying given the cheap cost. Thanks |
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3rd Apr 2024 5:51pm |
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