Resurrecting this old thread … for I too have been experiencing the “autopilot disconnect broken” warning message on the SkyView. Although I do not have a solution beyond what has been previously suggested, I did take some ohm readings to share. The warning message first appeared late November of last year … but seemingly went away after a SkyView reboot. I got the message again two weeks ago and now the “autopilot disconnect broken” warning message is constant ... unless, as mentioned by others, the AP is engaged. As a side note, the AP button on the AP Panel module, the panel mounted AP disconnect button and the pilot & co-pilot stick mounted disconnect switches all work just fine to engage/disengage the autopilot … so the wiring IS NOT intermittent.
I called Dynon about this and was told the issue is likely that my AP Panel module has a problem … so Dynon sent out a replacement. Over the weekend, I installed the replacement AP Panel module and sadly … it too does the same thing. So I reinstalled my original AP Panel module. As others have done, I just decided to get into the autopilot menu settings and selected NO for “enable broken line detect “… problem solved.
While I was at it, I decided to do a little troubleshooting of the wiring to share my results here. One of the earlier posts in this thread mentions a resistor should be used on the AP disconnect wire. Looking at the RV-12 wiring schematic, I noticed there is a 5K resistor mounted on the AV-50000A control module that goes to pin 15 of the Autopilot connector on the control module. Measured 5K at pin 15 to ground, so the resistor/internal wiring on the control module is good. The ground for the AP disconnect switch is obtained from pin 37 of the autopilot connector ... measured it and it is a solid ground.
Next, I pulled the Options connector off the control module to make sure the Y on the AP disconnect wiring was good. The other side of the Y goes to pin 9 on the Autopilot connector and is called AP Data I. The AP Data I circuit routes through the control module to pin 2 of the Options connector. If the Y and the interconnection through the control module is good, one should read around 5K from pin 2 in the Options connector on the control module to ground. I read 4.99K so there is complete continuity through the wiring. The only thing left to measure was the resistance of the AP Data I wire running from pin 2 on the Options connector to the Y, which then feeds both the roll and pitch servos. I left both the servos connected and made a ohm measurement from pin 2 on the Options connector to ground and got a reading of 25K ohms …. There must be a capacitor in the circuit because the reading started out much lower and slowly increased to the 25K ohm value …. it may actually have ended up higher, but I lost patience at 25K. Don’t know what value to expect here, but guessing this is a reasonable value.
I suspect the root of the problem resides inside the actual servos and how they report back to the SkyView. Admittedly, I did not remove any access panels to check the connectors at the servos … but since both servos engage and disconnect just fine when the buttons are pushed, the servos are obviously seeing the ground applied to the AP Data I wire running to them.