 | Home > Technical > Defender 2006 TD5 Throttle Peddle Problem ...... |
 
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410  
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RAVE is the digital parts and workshop manual.
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12th Jan 2018 10:18pm |
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| roel Member Since: 08 Aug 2009 Location: Lelystad Posts: 2039  
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I checked mine this morning.
Track 1 0.4 V to 4.5V Track 2 4.5 V to 0.4V Track 3 4.5 V to 0.4V Throttje pedal power 4.5V The first numbes are no throttle and the second full throttle. Roel 1984 90 2.5 na Diesel - RR V8 (1994-2001) 1997 Camel Trophy Discovery 300TDI (2001-2009) 2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts. 2003 90 Td5 (2009-now) |
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13th Jan 2018 2:21pm |
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| Mc071963 Member Since: 06 Jan 2018 Location: Hertfordshire Posts: 48 
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Hi Roel
Thats really very interesting .... are you reading these values with a multimeter attached to the connector or from a Hawkeye or such ?? I got 0 to 10v on the Driver demand supply rather than the 4.5 you have .... I wounder whats happening there .... Martin TD5 90 in Hertfordshire |
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14th Jan 2018 10:07pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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Morning Martin. I too also have a similar set of figures to Roel. Pretty sure that the pedal is only meant to have a 0-5v feed, so a feed of 10v is way too much...
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15th Jan 2018 8:14am |
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| Mc071963 Member Since: 06 Jan 2018 Location: Hertfordshire Posts: 48
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Hummm ... My reading is from a Hawkeye .... Are you guys reading with a multimeter or a diagnosis box ??
I think I'll try another defender and see what readings I get there ! Cheers guys TD5 90 in Hertfordshire |
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15th Jan 2018 8:35am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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Via Nanocom for me.
Workshop manual - [url]http://workshop-manuals.com/landrover/defendertd5/engine_management_system/sensor_throttle_position_(tp)_up_to_vin_607224/[/url] States 5v input. Some reason you are getting double the voltage. |
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15th Jan 2018 8:46am |
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| Mc071963 Member Since: 06 Jan 2018 Location: Hertfordshire Posts: 48
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Good read that page ....
Something very odd going on  Click image to enlarge [/url] TD5 90 in Hertfordshire |
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15th Jan 2018 9:02am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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That seems to suggest that there is a short to another earth/live going on... Regardless that would definitely confuse the ECU as it is expecting a value of 0-5v and it is getting twice that. According to that page any of those issues will force the engine only to idle no more.
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15th Jan 2018 9:11am |
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| Mc071963 Member Since: 06 Jan 2018 Location: Hertfordshire Posts: 48
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So I agree completely with your diagnosis ..... but ....
when the Defender is running normally on the road the voltage varies between 0 and 10v When I get the engine light on and the lack of throttle it's stuck on 0v really wierd It's off having some stuff done to it for the next two weeks, I can check with my Hawkeye on another Defender this afternoon but short of that I'm going to have to wait till it's back with me. The manual link is excellent - Handn't seen that yet .... RAVE well I had that already  just did not realise it was called that - Doh TD5 90 in Hertfordshire |
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15th Jan 2018 9:29am |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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Ok I think you may have potentially two problems here. The first is that you have unsanctioned voltage powering your throttle pedal and the second is that you may have damage to the components of the potentiometer associated with running higher voltages.
When you get your vehicle back check the wiring again for any chaffing, meticulously go over each vehicle earth point (clean and refit) and for belts and braces take the throttle out and clean it (contact cleaner and work the pedal to dislodge any dust bunnies). That 10v must be coming from somewhere, it is not normal. Actually whilst the pedal is out it would be a good idea to get your multimeter on it and test each of the three tracks through their entire movement pre and post clean. Assuming you have already hard wired a dedicated/direct earth from the ECU to the battery. If not it is well worth doing anyway. I have to replace mine as the garage kindly removed it when replacing the gearbox. I originally installed it on advice from Ian at IRB because I was getting an odd hesitation in the power delivery, the earth cleared it up instantly. |
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15th Jan 2018 10:13am |
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| Mc071963 Member Since: 06 Jan 2018 Location: Hertfordshire Posts: 48
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nice one thanks .....
I already have a spare pedal on standby. I'll report back in a bit. Thanks for the help and advice
Regards Martin TD5 90 in Hertfordshire |
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15th Jan 2018 10:31am |
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| roel Member Since: 08 Aug 2009 Location: Lelystad Posts: 2039
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I have an old style Nanocom. But I also checked it with a multimeter as I have an PSI powerbox and with a small pieces off Chinees electronics the PSI power box only works at full throttle.
So I had to find the right track and right voltage to programm into the electronics. I would suggest to use a multimeter before changing parts. Roel 1984 90 2.5 na Diesel - RR V8 (1994-2001) 1997 Camel Trophy Discovery 300TDI (2001-2009) 2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts. 2003 90 Td5 (2009-now) |
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15th Jan 2018 12:18pm |
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| fergyreid Member Since: 08 Jan 2018 Location: Gloucestershire Posts: 10 
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Hi Martin,
Went through my TPS to ECM wiring this weekend and no issues with continuity on any of the wires. 
Decided to get the diagnostics back out and had a look at my readings. These were all taken with ignition on. Faults cleared. Engine not running: Idle: Driver Demand 1: 0.49v Driver Demand 2: 4.66v Driver Demand Supply: 0v Flat to the mat: Driver Demand 1: 4.73v Driver Demand 2: 0.45v Driver Demand Supply: 10.0v Ranges all seem good to me and the diagnostics showed progressive voltage change across pedal travel on both demand 1 and 2, with them working inversely. I also have a "Driver Demand 3" value which is 2.76v at all pedal positions and whether engine is running or not. Does not change. Suspect this could be the MAF voltage as mine is currently unplugged. Can anyone confirm what driver demand 3 is?? Is the driver demand supply an ECM calculated value rather than an actual readout? Strangely mine developed a misfire last night as well....As earler mentioned i will be going through the earths next weekend. Wish i wasn't 150miles away from the truck during the week! Cheers, Fergus |
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15th Jan 2018 12:43pm |
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| roel Member Since: 08 Aug 2009 Location: Lelystad Posts: 2039
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The driver demand 3 should also be a voltage depending on your throttle position and also from high to low voltage.
The MAf has a complete different circuit and is not related to the throttle position. Roel 1984 90 2.5 na Diesel - RR V8 (1994-2001) 1997 Camel Trophy Discovery 300TDI (2001-2009) 2005 G4 Discovery III 4.4 V8 (2008-2018) It's gone but it still hurts. 2003 90 Td5 (2009-now) |
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15th Jan 2018 5:33pm |
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