What was found
ON TAXI OUT, RIGHT OUTER BRAKE TEMPERATURE VERY QUICKLY SHOT UP TO OVER 300 DEGREES F. AIRCRAFT EXITED TAXIWAY, APPLIED BRAKE FAN AND TEMPERATURE REDUCED TO BELOW 100 DEGREES F. ON TAKEOFF APPLICATION, TEMP EXCEEDED 300 DEGREES F. ABORTED TAKEOFF AT 80 KNOTS. TEMP REDUCED AGAIN WITHOUT BRAKE FAN. REMOVED AND REPLACED BRAKE TEMP SENSOR IAW AIRBUS MAINTENANCE MANUAL 32-47-15.