What was found
FLIGHT DIVERTED TO TYS DUE TO BRAKE OVERHEAT WARNING MESSAGE. FLIGHT DECLARED EMERGENCY WAS NOT OVERWEIGHT AT LANDING. CREW ABLE TO PERFORM ALL FLIGHT DUTIES. EMERGENCY VEHICLES WERE DISPATCHED UPON ARRIVAL IN TYS. BRAKE OVHT WARNING MESSAGE AT CRUISE NUMBER 2 BRAKE / DEFERRED #2 BTMS IAW CRJ900 MEL 32-46-01 OPT 4 BY REMOVING THE #2 BTMS SENSOR CANNON PLUG AND INSTALLING METAL DUST CAP AND PLUG AND SECURED HARNESS AS REQUIRED. PLACARD INSTALLED. PER MEL 32-46-01 OPT 4 CAT C.