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jonny2tanx



Member Since: 06 Jul 2014
Location: Harpenden, Herts
Posts: 156

United Kingdom 2005 Defender 110 Td5 XS CSW Alveston Red
Strange cruise control behaviour
I fitted-cruise control to my 2005 110 earlier this year and it has been a god send on our long annual trek to eastern Europe. This week however I was using it and operated the electric window switch as the window was slightly open and it disengaged the cruise control. It latches back on using the resume switch. Using either window switch either up or down disengaged the cruise control. No other switches affect it. I took all power feeds from behind the dash so didn't go anywhere near the window switches. The car also has a Speedo healer due to the Ashcroft ratio change mod in case that makes any difference. Any ideas where to start looking please?
Post #674363 30th Dec 2017 10:48am
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achuakh



Member Since: 12 Apr 2012
Location: Singapore
Posts: 157

Singapore 2002 Defender 90 Td5 SW Oslo Blue
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.
Post #675696 4th Jan 2018 2:07pm
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grafty99



Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

United Kingdom 2002 Defender 90 Td5 HT Caledonian Blue
+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
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Post #675697 4th Jan 2018 2:08pm
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geobloke



Member Since: 06 Nov 2012
Location: Nottinghamshire
Posts: 4350

United Kingdom 
Re: Strange cruise control behaviour
jonny2tanx wrote:
I fitted-cruise control to my 2005 110 earlier this year and it has been a god send on our long annual trek to eastern Europe. This week however I was using it and operated the electric window switch as the window was slightly open and it disengaged the cruise control. It latches back on using the resume switch. Using either window switch either up or down disengaged the cruise control. No other switches affect it. I took all power feeds from behind the dash so didn't go anywhere near the window switches. The car also has a Speedo healer due to the Ashcroft ratio change mod in case that makes any difference. Any ideas where to start looking please?


Hi Jonny. Off topic-is. Do you have a kit installed or are utilising the TD5s onboard cruise capability?
Post #675710 4th Jan 2018 2:48pm
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TJ101



Member Since: 30 May 2007
Location: Taunton Somerset
Posts: 3747

Isle Of Man 2015 Defender 110 Puma 2.2 XS CSW Montalcino Red
Quote:
??? utilising the TD5s onboard cruise capability ?


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
Post #675749 4th Jan 2018 3:48pm
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derbywill



Member Since: 25 Mar 2010
Location: Derbyshire
Posts: 539

England 2005 Defender 90 Td5 XS CSW Java Black
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
Post #675858 4th Jan 2018 7:46pm
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lightning



Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2159

United Kingdom 
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.
Post #675881 4th Jan 2018 8:50pm
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grafty99



Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

United Kingdom 2002 Defender 90 Td5 HT Caledonian Blue
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) Thumbs Up 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
Post #675885 4th Jan 2018 8:55pm
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jonny2tanx



Member Since: 06 Jul 2014
Location: Harpenden, Herts
Posts: 156

United Kingdom 2005 Defender 110 Td5 XS CSW Alveston Red
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. Thumbs Up
Post #675925 4th Jan 2018 10:32pm
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grafty99



Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

United Kingdom 2002 Defender 90 Td5 HT Caledonian Blue
The big bolt that supports the steering column isn't a very good earth point, I would be looking for a better one Thumbs Up 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
Post #675929 4th Jan 2018 10:37pm
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jonny2tanx



Member Since: 06 Jul 2014
Location: Harpenden, Herts
Posts: 156

United Kingdom 2005 Defender 110 Td5 XS CSW Alveston Red
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.
Post #675941 4th Jan 2018 11:11pm
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grafty99



Member Since: 15 Aug 2012
Location: North Devon
Posts: 4784

United Kingdom 2002 Defender 90 Td5 HT Caledonian Blue
Good place to start Thumbs Up 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
Post #675942 4th Jan 2018 11:13pm
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Harry.O



Member Since: 25 Jul 2014
Location: Warwickshire
Posts: 704

United Kingdom 1989 Defender 90 300 Tdi ST Nato Green
derbywill wrote:
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


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 Very Happy 2005 Td5 110 Hardtop
1989 300Tdi 90 Soft top
1992 200Tdi 90 Truck cab with Land Cruiser axles
Post #676105 5th Jan 2018 3:49pm
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steve_c3



Member Since: 30 Apr 2015
Location: Hants
Posts: 171

United Kingdom 2002 Defender 110 Td5 SW Epsom Green
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
Post #676147 5th Jan 2018 5:51pm
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lightning



Member Since: 23 Apr 2009
Location: High Peak, Derbyshire
Posts: 2159

United Kingdom 
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.
Post #676390 6th Jan 2018 4:36pm
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