Hi David, Unless someone has been messing about with the wiring, then either the ecu is faulty or it has a fault on the wiring to the ecu, The first thing that I would do with a job like that would be to disconnect the battery for a while and reconnect to reboot it and if that doesn't work, I would Check the wiring using Autodata Pin Data, ( oops, did I say Autodata ) We have had quite a few Meganes with broken wires in the harness. If everything then checks out ok, it must have a duff ecu. ??