http://www.fixya.com/cars/t13603007-renault_master_side_door_shows_opened
http://www.renaultforums.co.uk/17-electronics/141472-2010-master-side-door.html
http://www.roadtestreports.co.uk/vans/renault/master/qanda/ (See the post from Roy, Leicestershire: Renault Master: Hi, I've just purchased a 63 plate van, the dash is flashing up showing side door is open. I've taken out the mechanism as suggested on another site & sprayed/ cleaned all contacts with WD40 but still the annoying beep exists, any ideas will be appreciated. Thanks. Answers: Of the contacts you are cleaning are brass, then they are for the central locking and not tor door sensor! The sensor is like a button and its black! Maybe it needs a new one! Paul from Luton)
ACP, March 2017