Last Summer we boated 1 hour to dinner then docked with GenSet running. 1.5 hours at dinner then were returning home when some dash warning lights came on for the stbd engine. These indicators were 5 graphic lights depicting engine overheat and other scary things. The digital gauge readout was normal but I still had to check the engine room. All seemed normal there too. I restarted both engines and the lights did not turn on again or since. MY QUESTION: What system controls these warning lights? Engine sensors only? Engine Transmission Controller?
My thoughts are since the warning lights reset immediately, it must be an electronic controller, but no manual shows these displays.