What was found
LAV SMOKE EICAS MESSAGE ENROUTE. WOULD NOT EXTINGUISH, NO INDICATION OF SMOKE IN EITHER LAV. DIVERTED. LANDING UNEVENTFUL. REMOVED FROM SERVICE. NOTED #2 OIL Q DASHES UPON ARRIVAL. INTERROGATED CMC WITH NO FC'S LOGGED. FOUND LAV SMOKE TO BE INTERMITTENT. C/W GENARIC IO 3B RESET PER E175 FIM 45-45-00-938-A TEST PASSED. NO FURTHER DEFECTS NOTED. NO FAULTS NOTED IN CMC. NO PARTS REPLACED. AIRCRAFT RETURNED TO SERVICE.