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derbywill



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

England 2005 Defender 90 Td5 XS CSW Java Black
Td5 Cruise Control Inop
Hi All,

My 2005 Td5 90 cruise control has stopped working, I have a Roamerdrive fitted and was running the speedsignal through a speedo healer to fool the engine ecu. I have removed all this so the cruise should work when overdrive not engaged.
Prior to it not working at all the cruise occasionally would just drop out every now and again but now it just won’t work.

So what can stop the cruise from working?

So far I’m thinking, Brake switch, clutch switch, engine speed to road speed error. I can’t think of anything else.

I’ve plugged the Nanocom in and the brake and clutch switches are changing state when pressed, the clutch switch reads on when the pedal is not pressed but changes to off when pedal is pressed, is this correct?

Cheers

Will 2005 90 XS
1954 86'' Series 1 tilt
Post #898219 14th Apr 2021 3:25pm
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rallysteve



Member Since: 10 Feb 2014
Location: South Yorks
Posts: 2194

United Kingdom 2002 Defender 110 Td5 DCPU Keswick Green
I think the nanocom will also show the inputs from the Cruise Control switches shouldn't it?

I suspect you might have a bad connection either at your switches (whatever you used) or at the ECU end connections.

Steve 02' 110 TD5 Double Cab Rebuild Thread
84' 90 3.9 V8 Caged Pickup Build Thread


Mobile Diesel Heater Build Thread
Post #898223 14th Apr 2021 3:34pm
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derbywill



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

England 2005 Defender 90 Td5 XS CSW Java Black
Hi Steve,

I was thinking that but Nanocom shows the dash switches working.

I am going to rewire the switches as I have the Discovery steering wheel switch to fit.

Just seems odd how it isn’t working.

Cheers

Will 2005 90 XS
1954 86'' Series 1 tilt
Post #898234 14th Apr 2021 4:49pm
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Linds Hanson



Member Since: 16 Jan 2021
Location: Cornwall
Posts: 430

United Kingdom 
Has it got standard transfer gearing/ 5th gear etc?
Post #898236 14th Apr 2021 5:03pm
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derbywill



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

England 2005 Defender 90 Td5 XS CSW Java Black
Yes standard gearing, Roamerdrive bolted on but this wouldn’t effect it when just using normal gearing.

I’m going to rewire the switches, they have been fitted for at 9 years.

Cheers

Will 2005 90 XS
1954 86'' Series 1 tilt
Post #898270 14th Apr 2021 7:10pm
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geobloke



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

United Kingdom 
I have a very similar setup. The only thing I can think of are to check the ECU connections, they may not be seated quite right i the plug. The other thing is check your earths, switches and all as these can cause the ECU to do weird things. For instance I did at one point have a problem with hesitation during accelerating, turned out to be a bad earth near the ECU, dragged a direct earth back to the battery and not had a problem since. Just a thought...
Post #899320 21st Apr 2021 12:02pm
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derbywill



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

England 2005 Defender 90 Td5 XS CSW Java Black
Thanks GeoBloke, I’m going to rewire the whole system and use the disco 2 steering wheel buttons so will look abit more neat than a couple of push buttons.

Let’s see if it resolves the issue.

Cheers

Will 2005 90 XS
1954 86'' Series 1 tilt
Post #899727 23rd Apr 2021 5:50pm
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Bim



Member Since: 09 Jun 2018
Location: Cambs
Posts: 28

United Kingdom 2005 Defender 110 2.5 TD XS CSW Tonga Green
Have the Roamer overdrive fitted also and would also like to fit cc any news on the above did you manage to sort it
Post #900572 29th Apr 2021 4:33pm
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geobloke



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

United Kingdom 
Quote:
Have the Roamer overdrive fitted also and would also like to fit cc any news on the above did you manage to sort it


Hi Bim. The only thing that you require to get the CC working with the OD is the usual wiring and switches, plus a speedo healer to trick the ECU into thinking that you are not using anything other than the standard gearing. Thumbs Up
Post #900581 29th Apr 2021 5:08pm
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Bim



Member Since: 09 Jun 2018
Location: Cambs
Posts: 28

United Kingdom 2005 Defender 110 2.5 TD XS CSW Tonga Green
Thanks for that Geobloke going to fit on off for cc would you wire speed healer with on off so only on with cc
Post #900820 1st May 2021 8:00am
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geobloke



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

United Kingdom 
You could do, not sure what switching it on whilst driving would do to the ECU though. I would personally have it on all the time for simplicity.
Post #900870 1st May 2021 12:49pm
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Bim



Member Since: 09 Jun 2018
Location: Cambs
Posts: 28

United Kingdom 2005 Defender 110 2.5 TD XS CSW Tonga Green
That makes sense thanks Rolling Eyes
Post #900984 2nd May 2021 7:26am
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derbywill



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

England 2005 Defender 90 Td5 XS CSW Java Black
Hi Bim,

Just put a speedo healer and set to -20% it should work fine. You can have it on all the time shouldn’t cause any bother.

My on going saga, I have rewired and fitted the discovery cruise switches and check the status changes when pressed and they do. But still the cruise does not work even back to no speedo healer in the system.
So my next train of thought is to replace the clutch and brake switches even tho they seem to be working when checked them with the Nanocom. I just want to rule them out.

Cheers

Will 2005 90 XS
1954 86'' Series 1 tilt
Post #901151 3rd May 2021 10:00am
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Bim



Member Since: 09 Jun 2018
Location: Cambs
Posts: 28

United Kingdom 2005 Defender 110 2.5 TD XS CSW Tonga Green
Thanks for that derbywill was thinking about the % to set it at wil be ordering the bits next week. As in the summer we do a long trip 1,250 miles in one go non stop and it kills my leg for 3 days afterwards so am looking forward to this mod
Post #901778 6th May 2021 7:47pm
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Bim



Member Since: 09 Jun 2018
Location: Cambs
Posts: 28

United Kingdom 2005 Defender 110 2.5 TD XS CSW Tonga Green
Hi will
Have you maneged to sort it out if so what was the fault

Bim
Post #916517 11th Aug 2021 5:06pm
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