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Craig772



Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73
United Kingdom 2000 Defender 90 Td5 CSW Oslo Blue
10P or 15P ECU?
Hi folks,

I have TD5 90 CSW built in August 2000, first registered in November 2000 and built as a 2001 model.

My understanding is that the ECU's for the TD5 are 10P or 15P variants. The 15P being flashable whereas the 10P needs the chip removing for a re-map.

The engine number on the V5 says it's 10P. However when I do an internet search for the part number on the ECU (NNN000120) the results are not clear. Some suggest the ECU is plug and play making it the 15P and the earlier 10P part would be NNN500020.

I've read on another thread that the 10P to 15P cutover wasn't clean but started in 2002.

So have I got a 10P bottom end and the 15P head, injectors and ECU? is this likely to be factory? It's had 4 previous keepers, 113k miles and totally unmolested when it bought it. It doesn't suggest to me it's been modified by a previous owner.

TIA.
Post #1022752 27th Jan 2024 8:51pm
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Will@LRW



Member Since: 04 May 2019
Location: UK
Posts: 178
 1997 Defender 110 300 Tdi CSW Alpine White
The cutover from 10P to 15P engine numbers is very clean for UK vehicles, happening around mid August 2001 builds.

With 4 previous owners, there could be all sorts of history that wasn't passed on. I was always unearthing things on the Defender's i've owned!

Does the ECU have a sticker on it with the correct VIN? This is how they came from the factory.

If you can show some photos of the head, someone with more knowledge might be able to spot any differences. It may have only had a replacement ECU and injectors? LR Workshop
Find a Defender's history and spec: https://defender.lrworkshop.com
Post #1022758 27th Jan 2024 11:54pm
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Craig772



Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73
United Kingdom 2000 Defender 90 Td5 CSW Oslo Blue
Hi Will@LRW

When you say mid August 2001, do you mean the calendar year or registration period? Mine was built 7th August 2000 as a 2001 model. I think you refer to the calendar year so they'd likely be 2002 models?

The only sticker on the ECU is the one shown below. I've removed the lid to check inside as I am dealing with the common oil in the loom issue. I'll get some photo's of the head at some point. Thanks.



Click image to enlarge



Click image to enlarge
Post #1022797 28th Jan 2024 11:33am
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Jabberwocky



Member Since: 27 Oct 2021
Location: Luxembourg
Posts: 223
Luxembourg 
I thought 10p engines had a MSB part number and 15p had NNN? I have a MY2000 defender with a 10p engine, however the ECU has been changed at some point, it is dated 2003 and has the NNN model number on it.
Post #1022820 28th Jan 2024 4:24pm
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Craig772



Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73
United Kingdom 2000 Defender 90 Td5 CSW Oslo Blue
@Jabberwocky, you could be in the same situation as I think I may be in - Not that it's problem, in fact a good thing.

So far as I understand it, at 10P engine compared to 15P:

- Same bottom end
- Different head
- Different injectors
- Different ECU

10P ECU has soldered in CPU chip whereas 15P ECU is updatable via OMDB. https://www.instagram.com/roxi_defender90/
Post #1022844 28th Jan 2024 7:23pm
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Martin
Site Admin


Member Since: 02 Apr 2007
Location: Hook Norton
Posts: 6605
United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Montalcino Red
NNN flashable ECUs can be used on a 10P, but not the other way around (MSBxxxxxx non flashable on 15P)  1988 90 Td5 NAS soft top
2015 D90 XS SW
Post #1022850 28th Jan 2024 7:52pm
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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1624
Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
Craig772 wrote:
@Jabberwocky, you could be in the same situation as I think I may be in - Not that it's problem, in fact a good thing.

So far as I understand it, at 10P engine compared to 15P:

- Same bottom end
- Different head
- Different injectors
- Different ECU

10P ECU has soldered in CPU chip whereas 15P ECU is updatable via OMDB.


Different rockers too
Post #1022853 28th Jan 2024 7:56pm
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Craig772



Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73
United Kingdom 2000 Defender 90 Td5 CSW Oslo Blue
Martin wrote:
NNN flashable ECUs can be used on a 10P, but not the other way around (MSBxxxxxx non flashable on 15P)


Ahhh. Very useful to know. Thanks Very Happy https://www.instagram.com/roxi_defender90/
Post #1022855 28th Jan 2024 8:03pm
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Craig772



Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73
United Kingdom 2000 Defender 90 Td5 CSW Oslo Blue
NickMc wrote:
Craig772 wrote:
@Jabberwocky, you could be in the same situation as I think I may be in - Not that it's problem, in fact a good thing.

So far as I understand it, at 10P engine compared to 15P:

- Same bottom end
- Different head
- Different injectors
- Different ECU

10P ECU has soldered in CPU chip whereas 15P ECU is updatable via OMDB.


Different rockers too


I'll add rockers to my notes. Cheers Thumbs Up https://www.instagram.com/roxi_defender90/
Post #1022856 28th Jan 2024 8:04pm
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Lwb97



Member Since: 10 Sep 2015
Location: Powys
Posts: 75
Wales 2002 Defender 90 Td5 HT Oslo Blue
MSB ecu’s were discontinued and superceeded by the NNN ecu. Theres a correct flashable 10p map file to suit the NNN. Chances are the originals failed at some point and been replaced with a NNN ecu. If you’ve got access to a nanocom would be worth checking to see what vin number is stored in the ecu if no sticker on the top.
Post #1022869 28th Jan 2024 9:12pm
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Will@LRW



Member Since: 04 May 2019
Location: UK
Posts: 178
 1997 Defender 110 300 Tdi CSW Alpine White
Craig772 wrote:
Hi Will@LRW

When you say mid August 2001, do you mean the calendar year or registration period? Mine was built 7th August 2000 as a 2001 model. I think you refer to the calendar year so they'd likely be 2002 models?


August 2001 build date, which is the changeover from 2001 to 2002 models. 15P vehicles started being registered in Aug/Sep/Oct 2001 but there were still 10p vehicles being registered at that time. LR Workshop
Find a Defender's history and spec: https://defender.lrworkshop.com
Post #1022947 29th Jan 2024 7:52pm
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Craig772



Member Since: 23 May 2022
Location: Cannock, Staffordshire
Posts: 73
United Kingdom 2000 Defender 90 Td5 CSW Oslo Blue
Thanks Will@LRW and LWB97, I think the most likely scenario is the first ECU became toast and the backwards compatible NNN ECU was fitted with a 10P map.

I've learnt a lot from this thread. Thanks to all those who contributed. Thumbs Up Very Happy https://www.instagram.com/roxi_defender90/
Post #1022950 29th Jan 2024 7:57pm
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