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Biscuits



Member Since: 27 Mar 2023
Location: Kent
Posts: 52
United Kingdom 2001 Defender 90 Td5 CSW Epsom Green
Immobiliser - TD5
Hi,

Is there any way of permamently deactivating the factory immobiliser ?

Mine has an aftermarket (Hawk) alarm that does the central locking too, plus I now use a Swivel-lock... but need to have the OEM keyfob on my keyring for when the factory immobiliser decides to activate.

Maybe a simple thing I'm doing wrong, or how the aftermarket Hawk is configured.

TIA

Paul 2001 90 TD5 SW - Juice Motors Resto Mod - Epsom Green
2024 90 D300 HSE X-Dyn HT - Santorini Black
Post #1012265 23rd Oct 2023 2:45pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17386
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
The passive immobilizer (the system that requires the plip to be present) can be turned off with most diagnostic tools. Assuming that whatever alarm you have never requires you to press the buttons on the original plip you should be able to leave it at home.
Post #1012267 23rd Oct 2023 3:09pm
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TexasRover



Member Since: 24 Nov 2022
Location: Paris
Posts: 1052
France 2002 Defender 110 Td5 DCPU Chawton White
My Td5 has no alarm, no central locking and no receiver ring around the ignition barrel. Just a dump key which always works. All the 10AS does is fade the interior light.. ohhh.

From what I understand there is still a check between the ECU and the 10AS to 'unlock' the ECU, not sure what security that provides as with the Nanocom you can re-match the two. I rather my ECU did not have the 10AS check feature to make it a little less possible for something to go wrong. I think you can have that programmed out but you have to send it in to a specialist company. At that point all the ECU needs is power and that's it.

If the 10AS was to die all I would loose is the interior light dimming. I think I could just about live with that!
Post #1012270 23rd Oct 2023 3:19pm
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Hazza



Member Since: 10 Jan 2011
Location: North Yorkshire / Leeds
Posts: 214
United Kingdom 1990 Defender 110 Td5 HT Bronze Green
Most of the tuning companies should be able to disable the handshake between 10AS and ECU

I've had one done by Pete Bell at BAS. It's a physical process (or al least was on mine) rather than a software change. 1990 Defender 110 200TDI Camper - now converted to Td5 power
Post #1012340 23rd Oct 2023 7:09pm
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Biscuits



Member Since: 27 Mar 2023
Location: Kent
Posts: 52
United Kingdom 2001 Defender 90 Td5 CSW Epsom Green
Thanks for the pointers.

Will look to get it coded out.

Thumbs Up 2001 90 TD5 SW - Juice Motors Resto Mod - Epsom Green
2024 90 D300 HSE X-Dyn HT - Santorini Black
Post #1012387 24th Oct 2023 6:42am
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