2009 Yamaha F40 Outboard Service Manual, Page 46Get this manual
TECH FEA
Technical features and description
Electronic control system
Digital network system
The Yamaha F40H features digital network systemThe Command Link Multifunction Meter can also be installed as an optionIn this system, the signals cannot be detected with circuit tester, as data exchange between connected computers and the meters is being carried out continuously using their built-in ICsData or are repeatedly written or registered into the specified address of frameWhen any trouble occurs, trouble code information will also be written into the frameThe data communication wiring consists of pair of cables which are out of phase with each other to be free from external impacts