Re: factory alarm
Welcome to the garage.
No, they didn' change anything as far as i know. On my 2004 the alarm also arms using the internal lock switch. I don't have access to the service manual now, i will have a look when at home for the possible fault.
I presume that all doors lock when using the internal lock switch?
At this point i would presume a problem with the drivers door module or eventually a broken wire in the drivers door boot.