Hi,
On my 2010 Grandis the alarm sounds without reason, usually when the weather is wet or windy. I've had it checked at two Mitsubishi dealers who can never find anything wrong and put "customer to monitor" on the service invoice! This has gone on since March 2012, when the car was still under warranty.
Has anybody had the same problem? Can I disconnect the alarm siren without preventing the immobiliser from working? Any advice would be helpful. Alan