square command link

[JimCai]

My Yamaha Square Command Link gauges have quit all communication with the 4 stroke twin engines. They show the background but receive no engine info-Rpm, battery voltage,oil pressure, temp, and no fuel usage etc.
Have checked for loose connections, blown fuses and found none. Engines run fine but I probably will get no warnings.
I have no info on how the data get to the gauges.
Any help would be greatly accepted

[boats.net]

Don't know what engine you have but check bus wire harness to gauges and to engine possible bad wire harness.

[capnchuck]

I am having the same problem:
Just Started this weekend
Lost communications
The only thing that appears to be working is the fuel gauge, that gets its signal from another harness
I have a single F250txr with the square command link
So far I have checked the wiring and plugs, I replaced the hub in the transom with an inline hub, checked the wires for continuity, and checked the Fuse, etc
Diagnostics come up 01
Im not sure what to look for next either

[boats.net]

May need to take to dealer to have system tested if can't find a problem with harness or hubs.