Yamaha Marine Outboards Factory Service / Repair/ Workshop Manual 225G 250B L250B, Page 356Get this manual
TRBL ANLS
SELF-DIAGNOSIS
E Inspecting steps (1) Start the engine and let it idle(2) Check the diagnostic indicator's flash pattern to determine if there are any malfunctionsNOTE: When more than one problem is detected, the diagnostic tester's light flashes in the pattern of the lowest numbered problemAfter that problem is corrected, the light flashes in the pattern of the next lowest numbered problemThis continues until all of the problems are detected and corrected
Diagnosis code chart