Hi all - had - may be coincidental I don’t know. Had an eml on this evening. Plugged in laptop with sdd to see what it was, closed the session and disconnected sdd. Anyway I then put in my gap tool to clear the fault (easier than faffing on sdd I find but needed sdd to look at the fault count). Anyway took the key out the ignition and it binged constantly saying key in ignition when I opened the door?!? So I thought I know I’ll start it then turn it off.. key would not turn! Took it out flipped it upside down and eventually it turned however it would not start

I then put the iid tool back in and the pcm has lost communication with immobiliser and the cluster says lost control with security control..

I then tried to read the faults on the immobiliser and it says it cannot find the module.

I then got out and none of the central locking buttons work! Great! Tried the other key the same! Great!

Any ideas of where to start? Battery is good it only a year old.. where is the immobiliser do they go bad? Can I replace a duff one? Any advise welcome!

Cheers Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

First thing I would do is a hard reset, disconnect battery go for a cup of tea, check battery is good and reconnect.

You never know it might work, it cleared some faults on mine last year. Range Rover 4.2 Supercharged 2006
Ford Focus EcoBoost 1.5 2017
MG TF 2003

Previous Cars of note
Land Rover Discovery 2
Jaguar Mk2 3.8 - Company car
MG Midget 1974 - Concours

I’ll do it in the morning and will check the battery hasn’t discharged too much. Where is the immobiliser if I need to find it ? Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

I’d check the battery voltage. If it’s dipped whilst you’ve been on diagnostics all sorts of strange things can happen.

David. 2002 4.6 Vogue SE - Alveston Red with Lightstone Leather
2007 Range Rover Supercharged in Java Black with Ivory Leather
2012 Range Rover 5.0 SC Autobiography in Indus Silver with Jet/Ivory Interior
2012 Range Rover 4.4 TDV8 Autobiography in Baltic Blue with Sand Interior

As above, sounds suspiciously like a simple flat battery... Oh too easy to overlook when stuff goes wrong!

Ok chaps thanks so far - I have whipped the terminals off this morning and touched them together I have also stuck my battery charger on it. ill leave it until lunchtime and reassemble and feed back here... it is a monster battery though 110ah varta hence my hesitance Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Battery I'd say as well

I bought one from tayna, varta type 20 lasted 18 months only, pain in the arse to send back to tayna, lesson learned, put an agm on best thing to do ime.

you say that - I use age in my m6 as I have to they only seem to last 2 years or so now. They used to be Marta I believe and the first one from new lasted 5 years they switched to banner I get 2 year 3 if I'm luck before its at 50\5 and the car has a meltdown... Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF

Put it back together started first turn connected iid tool to the vim module and it had a fault lost communication with canbus hoping this isn’t the start of something bad Current stable:
2006 BMW M6
2007 4.2 V8 S/C FF
Gone:
2002 4.4 V8 FF