RV electrical gremlins are notoriously hard to chase down: a light that flickers once a week, a sensor that occasionally reports nonsense, a module that drops off the network for no obvious reason. Diagnostics gives you the tools to actually see what's going on instead of guessing. This is part of RVAltCtrl's optional Feature Store.
CAN bus health
A live, at-a-glance health status for the CAN network your RV's systems talk over, with frame counters (received and transmitted since boot) so you can tell whether the bus is quiet, busy, or actually having trouble. A basic version of this is available to everyone; unlocking Diagnostics adds detailed bus statistics, controller error counters, and bus state information for real troubleshooting.
Module map
A visual map of every module RVAltCtrl can see on the network, so you can confirm what's actually present and responding versus what your RV's build sheet says should be there.
Device and message-level detail
For the deepest dives, a device list and a raw DGN/PGN (message-level) view of exactly what's being sent and received, the same level of detail an installer or technician would want when tracking down a stubborn issue.