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Dr Phibes

Member Since: 24 Apr 2024
Location: Melbourne
Posts: 26

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

24th Apr 2024 10:15pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17373

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.

25th Apr 2024 7:39am

MadTom

Member Since: 10 Sep 2013
Location: Olomouc
Posts: 621

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

25th Apr 2024 8:05am

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17373

Aha, I failed to notice your mention of TD5 and was answering with a Puma perspective! Sorry.

25th Apr 2024 8:11am

Dr Phibes

Member Since: 24 Apr 2024
Location: Melbourne
Posts: 26

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.

25th Apr 2024 8:58am

MadTom

Member Since: 10 Sep 2013
Location: Olomouc
Posts: 621

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

26th Apr 2024 8:23am

Dr Phibes

Member Since: 24 Apr 2024
Location: Melbourne
Posts: 26

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.

26th Apr 2024 12:54pm

MadTom

Member Since: 10 Sep 2013
Location: Olomouc
Posts: 621

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

26th Apr 2024 7:18pm

Dr Phibes

Member Since: 24 Apr 2024
Location: Melbourne
Posts: 26

Any idea where? Or where to find a reference for the ECU that’s more comprehensive than the nanocom docs?

26th Apr 2024 9:29pm

rustandoil

Member Since: 08 Sep 2012
Location: Cotswolds
Posts: 738

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

27th Apr 2024 5:35pm

Dr Phibes

Member Since: 24 Apr 2024
Location: Melbourne
Posts: 26

Done. Refer https://www.defender2.net/forum/post1052727.html#1052727

24th Nov 2024 12:30am

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