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Dr Phibes



Member Since: 24 Apr 2024
Location: Melbourne
Posts: 7
Australia 
10AS Total Removal
Hi,

I want to totally remove my 10AS. If necessary I could replace it with a circuit board to send a required signal to the ECU. I have other means of security and want to maximise reliability as I intend to travel around outback Australia.

I have seen that such are advertised at great cost and if I can figure out the signal I could make my own, with a spare.

I have a nanocom and have disabled all 10AS functions.

Is total removal of the 10AS possible?

Is the only need for the 10AS to send a signal to the ECU to allow ignition?

Has anyone profiled the signal with a scope? Is it unique/coded?

And even more radically has anyone investigated the feasibility of making an open source TD5 ECU?

Thanks
Post #1032742 24th Apr 2024 11:15pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16893
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Have a word with Defender-legend Pete Bell at BAS Automotive Services, I believe that he can programme your ECM so that the 10AS is completely redundant as far as the immobilisation strategies. If you then remove the 10As you will also lose the alarm, remote locking, central locking, and the courtesy light timer/dimming features.
Post #1032772 25th Apr 2024 8:39am
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 579
Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
For TD5 it is possible to modiffy engine ECU to not communicate with 10AS, so no need for any ad on board.
The rest is only bypass 10AS blocking starter relay, so just one wire, and it will run. Thinks like alarm, central locking, ... are a bit different question. It would recomend at least some hidden switch, instead of alarm/immobiliser function of 10AS. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #1032776 25th Apr 2024 9:05am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16893
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Aha, I failed to notice your mention of TD5 and was answering with a Puma perspective! Sorry.
Post #1032778 25th Apr 2024 9:11am
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Dr Phibes



Member Since: 24 Apr 2024
Location: Melbourne
Posts: 7
Australia 
MadTom wrote:
For TD5 it is possible to modiffy engine ECU to not communicate with 10AS, so no need for any ad on board.
The rest is only bypass 10AS blocking starter relay, so just one wire, and it will run. Thinks like alarm, central locking, ... are a bit different question. It would recomend at least some hidden switch, instead of alarm/immobiliser function of 10AS.


Thanks. When you say modify the ECU, is that basically to disable all 10as functions using the nanocom? Understood re starter relay.

I have an optimill swivel steering hub, and have added my own central locking.
Post #1032784 25th Apr 2024 9:58am
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 579
Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
TD5 engine ECU is connected do 10AS alarm ECU over one wire. It is used for immobilizer function of engine - no communication, no fuel injection. Engine ECU can be moddified to no need of this wire, but not with Nanocom. Some memory reprogram inside of the ECU is needed. I think, this is better solution, than adding some 10AS simulator board - one think less to stop working. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #1032905 26th Apr 2024 9:23am
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Dr Phibes



Member Since: 24 Apr 2024
Location: Melbourne
Posts: 7
Australia 
Thanks. I will see if I can figure out what value needs to be written to which address. Will post back if I do. Believe I can dump the ECU image via nanocom, modify, and upload.
Post #1032939 26th Apr 2024 1:54pm
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MadTom



Member Since: 10 Sep 2013
Location: Olomouc
Posts: 579
Czech Republic 1999 Defender 130 Td5 HCPU Baltic Blue
It is not in main flash memory. "Drobek" = The Small One - Discovery 2, "Blufínek" = The Blue Thing - Defender 130, and for me at least Ford Mondeo Smile
Post #1032979 26th Apr 2024 8:18pm
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Dr Phibes



Member Since: 24 Apr 2024
Location: Melbourne
Posts: 7
Australia 
Any idea where? Or where to find a reference for the ECU that’s more comprehensive than the nanocom docs?
Post #1032996 26th Apr 2024 10:29pm
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rustandoil



Member Since: 08 Sep 2012
Location: Cotswolds
Posts: 671
England 2005 Defender 110 Td5 XS DCPU Bonatti Grey
I don't know if he'd be able to help but look up car junkeez on YouTube he seems to know his way around the electronic bits of Defenders
Post #1033066 27th Apr 2024 6:35pm
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