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martindavis

Member Since: 10 Nov 2015
Location: Cumbria
Posts: 20

ECU advice

Hi all the ecu is dead on my 1999 defender td5 is it possible to fit a discovery ecu with a serial number nnn as I have a discovery ecu fitted at the minute just to get it going it has a serial number of msb and drives like a pig I know the nnn is digital and the msb is analog and the discovery software can not be taken out of it (the msb ecu) I only ask as there are more discovery ecu about than defender ones thanks in advance

13th Nov 2016 10:57pm

MadTom

Member Since: 10 Sep 2013
Location: Olomouc
Posts: 616

Using NNN ecu is possible, but you must use ECU for car with manual gearbox, like NNN00120, NNN500020 or NNN500250.
And you must program the right map for Defender, into the ECU, and for the correct version of engine (probably Euro2). This is just few minutes with Nanocom.
Using Disco2 ECU in Def is possible, but the throttle response is like on/off switch and temperature indicator works in opposite, so quite useless. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo

14th Nov 2016 11:22am

srod

Member Since: 20 Mar 2015
Location: Argyll
Posts: 190

Other than the standard defender map, are there any settings that are specific to the particular vehicle that would need entering also, like injector codes etc? How do you obtain that info if the old ECU is dead?

For example - is it possible/worth taking a backup of an ECU whilst it's working, so that in the event of having to replace it, the new one can simply be reflashed with the old info?

14th Nov 2016 11:50am

dorsetsmith

Member Since: 30 Oct 2011
Location: South West
Posts: 4554

good information on link below

http://www.aulro.com/afvb/electronic-diagn...stall.html

14th Nov 2016 12:03pm

martindavis

Member Since: 10 Nov 2015
Location: Cumbria
Posts: 20

Thank you all very helpful information on with getting the ecu now

14th Nov 2016 9:19pm

MadTom

Member Since: 10 Sep 2013
Location: Olomouc
Posts: 616

In TD5 engine ECU there are only few settings:
1. loading the right map - only for newer NNN type ECUs, with old MSB type ECUs only by changing the whole ECU or replacing (soldering) the memory chip inside
2. pairing the ECU with the imo/alarm ECU (10AS in Defender, BCU in Discovery 2) - easy with diagnostic equipment - in one car (one IMO ECU) you can pair more engine ECUs and than just swap them without using the diagnostic equipment
3. injector codes - read from the old ECU and write to the new, if not possible, they are written on the injectors, so removing the valve cover
4. gas pedal type - 2 way (older) or 3 way (newer) - just choose the right with diagnostic

2. - necessary for starting engine, with some modification inside ECU the IMO pairing need can be removed
4. - if not correct, engine will only idle
3. - needed for smooth engine run
1. - needed for correct engine function

for short test or in case of trouble somewhere outside only 2. and 4. is needed to run the engine again "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo

16th Nov 2016 7:04am

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