 | Home > Td5 > Strange cruise control behaviour |
 
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| achuakh Member Since: 12 Apr 2012 Location: Singapore Posts: 158   
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Is the speedo healer behind the dash or next to the ecu?
I'm suspecting you have a ground issue and when you press the windows they induce a ground loop and that send down to your switches as a disengage trigger or to your brake or clutch switch. Do you have a nanocom? Try reading the switch status of the brake and clutch when pressing the window buttons. I'm not sure of your setup, but I took the power from the same line going to the ecu and the same ground post on th ecu to minimise these issues. From the land of the most expensive land rover defenders on planet earth. At �125k for a XS 110 csw and you get to own it only for 10yrs! Please find me a good reason to stay on this island. |
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4th Jan 2018 2:07pm |
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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4785  
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+1 for earthing issue somewhere 2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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4th Jan 2018 2:08pm |
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| geobloke Member Since: 06 Nov 2012 Location: Nottinghamshire Posts: 4410
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Hi Jonny. Off topic-is. Do you have a kit installed or are utilising the TD5s onboard cruise capability? |
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4th Jan 2018 2:48pm |
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| TJ101 Member Since: 30 May 2007 Location: Taunton Somerset Posts: 3749  
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Discovery TD5 have the "onboard " bits already,,, Not Defender, hence if you look at prices, the Defender kit is near three times the price Back on Topic,, Agree,, you have a earth issue somewhere California F1, 75th 110 "Kermit", 50th Ann V8, 90 V8 Hybrid, 55 Series 1 Main Brian James Trailer Dealer for South West UK |
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4th Jan 2018 3:48pm |
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| derbywill Member Since: 25 Mar 2010 Location: Derbyshire Posts: 556  
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Slightly off topic, I have a Roverdrive fitted so my cruise control will not work when it is engaged, how do you wire in the speedo healer to work?
Cheers Will 2005 90 XS 1954 86'' Series 1 tilt 1968 88” 2A 200tdi 2002 110 Hardtop |
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4th Jan 2018 7:46pm |
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 2749
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The Defender should also have the cruise control software built in as it’s effectively the same engine/ECU.
There has been much discussion about this. Some say you can add cruise control to a Defender TD5 with two push buttons and some wire. Others that you need a module costing £400. |
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4th Jan 2018 8:50pm |
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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4785
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Any NNN ECU (post 2002) equipped defender can have 2 button and some wire cruise control if It has standard gearing (1.4 transfer ratio).
The Speedo healer needs to be fitted between the speedometer output and ECU if the gearing has been changed. This is because the ECU is out of parameters for cruise control to activate (revs too low for given speed)  2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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4th Jan 2018 8:55pm |
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| jonny2tanx Member Since: 06 Jul 2014 Location: Harpenden, Herts Posts: 156 
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Thanks everyone for the suggestions, particularly about checking the brake and clutch switch with the Nanocom. I'll try that at the weekend. If I remember rightly I earthed the install behind the instruments using the big mounting bolt there so I will take a look there too.
I'm using the cruise facility of the ECU using instructions from this and other forums. I have a couple of switches under the instrument binnacle - one to switch on/off and the other a momentary on/off/momentary on switch for set and resume. Power is taken from behind the dash, the temp gauge I think. I have the Speedo healer installed near the ECU. I'll update when I've had a look and (hopefully) found the issue. |
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4th Jan 2018 10:32pm |
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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4785
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The big bolt that supports the steering column isn't a very good earth point, I would be looking for a better one
2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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4th Jan 2018 10:37pm |
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| jonny2tanx Member Since: 06 Jul 2014 Location: Harpenden, Herts Posts: 156
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Thanks for the advice Grafty. . I shall try an earth cable direct to the auxiliary fuse box I fitted and see if that solves the problem.
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4th Jan 2018 11:11pm |
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| grafty99 Member Since: 15 Aug 2012 Location: North Devon Posts: 4785
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Good place to start
2002 90 Td5 Station Wagon
1990 Vogue SE Triumph Tiger Explorer 1200 Td5 90 Thread http://www.defender2.net/forum/topic50767.html Tdi 110 Thread https://www.defender2.net/forum/topic69562.html RRC Thread http://www.defender2.net/forum/topic54492.html Instagram http://www.instagram.com/george_grafton |
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4th Jan 2018 11:13pm |
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| Harry.O Member Since: 25 Jul 2014 Location: Warwickshire Posts: 713 
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Mine did similar after fitting a recon gearbox with a v8 5th gear ratio. Reading around on the net, the advice was to fit it near the transfer box however I didn't want the Speedohealer to affect the reading of the speedo so I installed the unit between the instrument cluster and the ECU under the seat as Grafty mentioned above. The red cable on the Speedohealer needs an ignition live, the black cable needs an earth point, both of which you should find under the seat. Cut the yellow/white ECU wire coming from terminal B13 on the black ECU plug, connect the white wire on the healer to the speedo gauge end and the green wire to the ECU end. Programme it as per the instructions on their website and all is good, my cruise control works once again  2005 Td5 110 Hardtop
1989 300Tdi 90 Soft top 1992 200Tdi 90 Truck cab with Land Cruiser axles |
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5th Jan 2018 3:49pm |
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| steve_c3 Member Since: 30 Apr 2015 Location: Hants Posts: 173 
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I've fitted the 'two buttons and some wire' version with a disco transfer box and a speedo healer. interestingly mine does exactly the same thing. If the window is down and you put it up, its fine but if you press the window button again and the window is already fully closed, it cancels the cruise control! It's never really bothered me but I'd be interested to know if you solve it. This is my switch taken from a disco:
 Click image to enlarge 2002 Defender 110 CSW TD5 |
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5th Jan 2018 5:51pm |
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| lightning Member Since: 23 Apr 2009 Location: High Peak, Derbyshire Posts: 2749
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Is it possible to buy the “two buttons and wiring harness” cruise control kit? It used to be available but now l can only find the £400 one that l don’t need.
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6th Jan 2018 4:36pm |
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