Autopilot looses calibration?

[wmcunninghamii]

Chuck,

The bad news is the ACU failed to connect once again after operating well with new software for a short time.

The good news is I have isolated the root cause and have repaired it.

My concern with just sending the unit back for warranty was the intermittent nature of the problem. I had a splice in the ACU 200 STNG cable in order to lengthen it and, as a Hail Mary, I decided to take a closer look at that splice. Physically it looked fine, no pull apart, all wires sealed and no physical indication there was any weakness. However when I removed it an ohmed it out I found an open on the CANL (white) wire. Apparently the system will sometimes work when CANL is open. It may have been intermittent but looked like a hard failure to me.

In any event, I repaired the splice and reinstalled. All is good. This time I soldered and shrink wrapped all the wires, no more butt connectors for me.