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Hi Alife first of all you will have to get the key scand for output to see if it is putting out a signal if that is Ok then check all the fuses in all the fuse boxes nomator what they do if that doesn't work you will have to find someone with a good scanner that can read the security system in the fuse box there's no other way. i had to replace the fuse box when mine went wrong but i still at to tell the fuse box to accept the signal from the key you have also got a receiver in the headlining which might be a issue ? up by the interior light ? sorry i can't be of any more help i don't know where you live but i live in Nottingham England.
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