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mwestcrew



Member Since: 09 Dec 2019
Location: South Warwickshire
Posts: 291
United Kingdom 2011 Defender 130 Puma 2.4 HCPU Baltic Blue
Immobiliser.HELP PLEASE
Im broken down at Lancaster services M6 Notthbound.
Vehicle won’t start.

Key out the red immobiliser light is flashing slowly.

Key in and ignition on the light is on solid. When I try to start the engine nothing happens at all

Alarm fob did nothing at all, changed the battery, still nothing, still no start.

No central locking fitted.

Anybody any ideas please

TIA 2011 130 Utility Body
2005 110 Van
Post #1078209 24th Oct 2025 8:14am
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Ianh



Member Since: 17 Sep 2018
Location: Essex
Posts: 2542
United Kingdom 
I suspect a blown 10AS fuse. If you had central locking I would suspect a broken wire between a second row door and the b post. However you may still have the wiring even if no central looking.
So check 10AS fuses and if a replacement blows then check door wiring.

Ps when you changed the fob battery (CR2032) did you check there is no clear plastic insulator left on the battery for transit ( it’s happened before) .

Also have you re synced the fob, it may have lost sync. Process - with doors shut press lock 4/5 times in quick succession, then unlock once


Wiring diagrams
https://www.lrworkshop.com/wiring-diagram/...tem/active
https://www.lrworkshop.com/wiring-diagram/...em/passive

Fuse box’s
https://www.lrworkshop.com/electrics/defen...nd-headers


If not fuses or fob battery then remove Instrument cluster , remove wiring connector, shunt (use wire , paper clip etc to bridge ) pins 3 and 4 and see if engine starts. If it does it’s the cluster pcp . This is only on the 2.4
Post #1078232 24th Oct 2025 11:37am
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Ianh



Member Since: 17 Sep 2018
Location: Essex
Posts: 2542
United Kingdom 
Did you manage to identify and rectify the issue ?
Post #1078318 25th Oct 2025 12:16pm
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mwestcrew



Member Since: 09 Dec 2019
Location: South Warwickshire
Posts: 291
United Kingdom 2011 Defender 130 Puma 2.4 HCPU Baltic Blue
Hi Ian

Yes I did.

I’d tried all sorts of things but in the end this is what made it work.

The fob had list sync.

Unplugged the 10AS and left it for 20 minutes

Removed the battery from the bob and pressed the buttons to discharge any capacitors.

Repowered the 10AS

Re-inseted the battery.

Held the fob near the tbe 10AS

Plipped 4 times quickly

5th plipped de-armed the immobiliser.

Thanks for you ideas and help.

Called loads of people who sucked their teeth and said that the box would have to go away for repair.

Happy days!! Only three hours late arriving in Fort William!!! 2011 130 Utility Body
2005 110 Van
Post #1078330 25th Oct 2025 5:09pm
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