What was found
AT 40 KTS, MASTER CAUTION, AUTOTHROTTLE DISC, ALERT APPEARED ON EICAS. REJECTED TAKEOFF. CLEARED MESSAGE WITH AUTOTHROTTLE DISCONNECTS ON THROTTLE QUADRANT. PERFORMED TROUBLESHOOTING & TEST ITEM 02, 05, 10 IAW FIM 22-03 FAULT TREE 828 FIM 22-03 FAULT TREE 835, NO FAULT FOUND. ALL TEST PASSED. PERFORMED TEST MCDP ITEM 30 & 40 FOR LLM IAW AMM 22-00-02-2, TEST PASSED. OPERATIONS CHECKED OK. ACFT STILL CAT 3.