DEVICE AND METHOD FOR FUNCTION DETECTION IN A FEED CONFIGURATION

The invention relates to a method for function detection in a feed configuration (230; 302a; 302b; 303a; 303b) which comprises feed lines (302a; 302b; 303a; 303b), an electronic conversion unit (310; 230) and a three-phase electric motor (230; 330). The method comprises the steps of: - detecting (s410) a response signal (S) in a feed line (301a; 301b) for the feed configuration (230; 302a; 302b; 303a; 303b), - detecting (s420) levels (v1-vn) of specific sections of said response signal (S), - comparing (s430) levels (v1-vn) thus detected of said specific sections of said response signal (S) with a predetermined threshold level (Th) over a predetermined period of time (T), and - determining (s440) an unwanted function of the feed configuration (230; 302a; 302b; 303a; 303b) if all of the levels (v1-vn) thus detected of said specific sections of said response signal (S) are below said predetermined threshold level (Th) over said predetermined period of time (T). The invention relates also to a computer programme product containing programme code (P) for a computer (200; 210) for implementing a method according to the invention. The invention relates also to a device and to a motor vehicle equipped with the device.