gadget Posted July 21, 2012 Share Posted July 21, 2012 At the change over from the old MSB ECU to the later NNN ECU, was the wiring changed at the ECU plugs? Quote Link to comment Share on other sites More sharing options...
Off Road Toad Posted July 21, 2012 Share Posted July 21, 2012 I don't think there are significant differances. I have a nnn ecu on my early td5 but my wiring looms could be from anything as its a conversion and the looms came from eBay Quote Link to comment Share on other sites More sharing options...
BogMonster Posted July 21, 2012 Share Posted July 21, 2012 Not that I'm aware of, because you can't buy the old ECUs any more and you have to get a new type one and flash it as an old one Quote Link to comment Share on other sites More sharing options...
gadget Posted July 21, 2012 Author Share Posted July 21, 2012 Thanks folks. I don't suppose anyone has the pinout/wiring differences between the two for the EU2/EU3 engines? Quote Link to comment Share on other sites More sharing options...
henk Posted July 22, 2012 Share Posted July 22, 2012 Difference is the size of the memory and if it can be flashed (=reprogrammed) or not. Tuning a MSB type ecu means you have to put a new chip in, a NNN can be reprogrammed Quote Link to comment Share on other sites More sharing options...
gadget Posted July 22, 2012 Author Share Posted July 22, 2012 Difference is the size of the memory and if it can be flashed (=reprogrammed) or not. Tuning a MSB type ecu means you have to put a new chip in, a NNN can be reprogrammed Was the ILT additional wiring or using spares in the original loom? Quote Link to comment Share on other sites More sharing options...
Porny Posted July 23, 2012 Share Posted July 23, 2012 Not a problem to use a NNN ECU on a pre 2002 Td5.... only wiring changes effect the EGR and a couple of other (none important) features. However you MUST make sure you use the correct software/calibration for the pre 2002 engine - and the ECU settings will need to be changed to use the earlier two track throttle pedal. When the Td5 went to lot EU3 lots of things changed (due to emission regs) - and as such the mapping between the EU2 and EU3 engine is very different - and not changing the software can cause problems. Don't get a NNN500250 as these were only used on a Discovery, and there is no proper Defender software for them... and don't get an Auto ECU. You need a NNN500020 or an NNN000250 - as for both ECU versions there is a correct EU2 file for the later EU3 ECU, Ian Quote Link to comment Share on other sites More sharing options...
gadget Posted July 23, 2012 Author Share Posted July 23, 2012 Thanks for the info Ian. The reason i'm interested in the differences is because I have an MSB101171 unit here and it doesn't work any longer. The problem appears to be a 4.7uf 35v tantalum that has failed catastrophically and burned part of the board in its demise. I was curious if it could be that the previous owner had plugged it in to a 2002 vehicle and caused the failure. Chances are it was just the tantalum going short, but it's always good to ask if unsure. Quote Link to comment Share on other sites More sharing options...
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