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phillips321



Member Since: 16 Dec 2021
Location: UK
Posts: 103
2005 Defender 110 2.5 TD DCPU Belize Green
Changed transfer box to 1.2 and cruise control doesn’t wor
Hi guys,

I’ve made the cruise control mod a few years ago to my TD5. It worked lovely until I changed my transfer box to a 1.2 ratio. My Speedo still reads correct but the cruise control doesn’t work?

Is there an ECU mod that can be performed to fix this?

Thanks in advance
Post #1039803 12th Jul 2024 7:33pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6601
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
https://www.defender2.net/forum/search.php...edo+healer  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #1039805 12th Jul 2024 7:48pm
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Mo Murphy



Member Since: 01 Jun 2008
Location: Letchworth Garden City, Herts
Posts: 2213
United Kingdom 1984 Defender 90 BMW M57 3.0 Diesel HT Auto Pennine Grey
It can be done in the ECU too, negating the need for a speedo healer.
Mo The Land Rover 90 - Many are called, few are chosen.

50 Shades of Pennine Grey
Post #1039854 13th Jul 2024 1:02pm
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phillips321



Member Since: 16 Dec 2021
Location: UK
Posts: 103
2005 Defender 110 2.5 TD DCPU Belize Green
Been quoted £130+VAT For the ECU mod but I can get a speedo healer for £85ish

If I go the healer route I assume I put it between speedo and ECU? If so I’ll mount it behind the speedo cluster. Anyone know the correct cable I need to put it between?
Post #1039857 13th Jul 2024 1:28pm
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Harry.O



Member Since: 25 Jul 2014
Location: Warwickshire
Posts: 712
United Kingdom 1989 Defender 90 300 Tdi ST Nato Green
I had a similar issue on my TD5, after installing a recon gearbox with the V8 5th gear ratio.

The pulse signal goes from the sender on T-box to speedo gauge where it is multiplied by 2 and sent down to the ECU. In my case, the altered 5th ratio sent a false signal which tells the ECU to cancel the CC due to the signals being out of the parameters.

The speedo read accurately and I didn't want to change that so I installed the unit between the instrument cluster and the ECU near to the main black ECU plug. In this case the red cable on the Speedohealer needs an ignition live, the black cable needs an earth. Cut the yellow/white ECU wire coming from terminal B13 on the black ECU plug, connected the white wire to the speedo gauge end and the green wire to the ECU end. 2005 Td5 110 Hardtop
1989 300Tdi 90 Soft top
1992 200Tdi 90 Truck cab with Land Cruiser axles
Post #1039866 13th Jul 2024 4:55pm
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phillips321



Member Since: 16 Dec 2021
Location: UK
Posts: 103
2005 Defender 110 2.5 TD DCPU Belize Green
Thanks for this.
Post #1039870 13th Jul 2024 6:05pm
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phillips321



Member Since: 16 Dec 2021
Location: UK
Posts: 103
2005 Defender 110 2.5 TD DCPU Belize Green
Harry.O wrote:


The speedo read accurately and I didn't want to change that so I installed the unit between the instrument cluster and the ECU near to the main black ECU plug. In this case the red cable on the Speedohealer needs an ignition live, the black cable needs an earth. Cut the yellow/white ECU wire coming from terminal B13 on the black ECU plug, connected the white wire to the speedo gauge end and the green wire to the ECU end.


Any idea if that yellow/white cable goes behind the instrument cluster to the speedo?
Post #1039871 13th Jul 2024 6:06pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6601
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
It's yellow+pink, and is on one of the pink plugs to the speedo.  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #1039880 13th Jul 2024 7:54pm
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derbywill



Member Since: 25 Mar 2010
Location: Derbyshire
Posts: 556
England 2005 Defender 90 Td5 XS CSW Java Black
I put my speedo healer with the engine ecu, I have on overdrive so fitted a 5pin relay to switch the speed signal going direct to the ecu or via the speedo healer.

Cheers

Will 2005 90 XS
1954 86'' Series 1 tilt
1968 88” 2A 200tdi
2002 110 Hardtop
Post #1039927 14th Jul 2024 1:32pm
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Linds Hanson



Member Since: 16 Jan 2021
Location: Cornwall
Posts: 484
United Kingdom 
I wouldn't put the healer on the speedo feed as your speedo will read slow I better to connect it at the ECU speed input .
Post #1040012 15th Jul 2024 12:27pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6601
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
The yellow/pink is the signal OUT of the speedo, to the ECU.  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #1040013 15th Jul 2024 12:30pm
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mturri



Member Since: 13 Jul 2010
Location: All over
Posts: 33
 2006 Defender 110 Td5 CSW Bonatti Grey
phillips321 wrote:
Been quoted £130+VAT For the ECU mod but I can get a speedo healer for £85ish

If you have a Nanocom (or access to one), and have not had your ECU remapped, I can do the Cruise Control healing ECU mod for you at zero cost.

Rgds
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
Post #1040416 20th Jul 2024 8:41am
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bankz5152



Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2142
2004 Defender 110 Td5 DCPU Epsom Green
However that will most likely remove any current mapping you have in place. Instagram @defender_ventures
Empire Tuning - Agent
Post #1040462 20th Jul 2024 12:33pm
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mturri



Member Since: 13 Jul 2010
Location: All over
Posts: 33
 2006 Defender 110 Td5 CSW Bonatti Grey
bankz5152 wrote:
However that will most likely remove any current mapping you have in place.

Most definitely, hence the requisite of not having had the ECU remapped. 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
Post #1040463 20th Jul 2024 12:43pm
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bankz5152



Member Since: 02 Feb 2017
Location: South London/North Kent
Posts: 2142
2004 Defender 110 Td5 DCPU Epsom Green
Laughing Sorry missed that! Easy to without retaining mapping Instagram @defender_ventures
Empire Tuning - Agent
Post #1040464 20th Jul 2024 12:51pm
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