Immobiliser and defective key

Talk about the 406's electrical system, what wires do what, how to add extra functionality, etc.

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Immobiliser and defective key

Post by hamster1 » Tue May 02, 2017 2:05 am


I recently bought a 406 with a defective electronic key and with a broken door lock, however I got the door lock to work again (thanks to white grease and this forum) so the door works only with the metal bar style spare key.
So the "original" broken key goes only to the ignition and the trunk.

My question is if start locking the doors now will the immobiliser "kick in" and not turn off since my electric one button electric key doesn't work? (I've tried to switching batteries but I think the circuits are fried)

Best regards!

/ Oliver

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Re: Immobiliser and defective key

Post by GingerMagic » Tue May 02, 2017 6:36 am

Hi Oliver.
Short answer - no.
The immobiliser is a chip in the key, hidden in one of the top corners - it's completely separate to the central locking system and each will work independently.

If your cat starts then your immobiliser and chip work fine 8)
1999 T4 family wagon
2005 Vauxhall Meriva
1998 406 V6 Coupe - Midlife crisis..!
PP2000 user, can help with faults / diagnostics in the Bournemouth area.

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