As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
DURING CLIMB OUT, CREW RECEIVED SMOKE TOILET CAUTION MESSAGE. F/A REPORTED NO EVIDENCE OF SMOKE OR ODOR IN THE CABIN. RAN ACFT ABOUT 15 MIN AND TRIED EVER COMBINATION OF BLEED AIR AND ELECTRICAL BUT UNABLE TO DUPLICATE. NO INDICATION IN COCKPIT OR VISUAL.