What was found
ON TAKEOFF, AT APPROX 40 KTS, MASTER CAUTION ILLUMINATED WITH CHIMES, AUTO THROTTLE DISC, DISPLAYED ON EICAS. TAKEOFF WAS REJECTED. FOLLOWED QRH PROCEDURES, ALERT CLEARED. NORMAL TAKEOFF WAS COMPLETED. INSPECTED & CLEANED LT & RT AUTO THROTTLE DISCONNECT SWITCH INSIDE THE THRUST LEVER HANDLE IAW SMP. PERFORMED MCDP TEST 2 TMC, 10 A/T SERVO, 12 A/T DISC SWITCH, 30 CURRENT FAULT & 40 A/L IAW MM 22-00-02-2. ALL TEST PASSED, NO CURRENT FAULT. ACFT READY FOR SERVICE.