What was found
ON TAKEOFF ROLL ADVANCED POWER LEVER JUST FORWARD OF FLIGHT IDLE AND GOT A #1 BLEED HOT CAUTION. HAD NOT SET TAKE-OFF POWER. ABORTED TAKE-OFF AND RETURNED TO GATE AT DIRECTION OF M/C. RAN ETA CHECKLIST AND BLEED HOT CAUTION EXTINGUISHED. REMOVED FROM SERVICE. INTERROGATED CDS & FOUND 4001 ECU DIG CH1 IN PRESENT FAULTS AND 7002 L. WING LEAK IN FLT HISTORY. C/W Q400 FIM TASK 36-10-00-810-853. INSPECTED L. DUCT TEMP SW & FOUND TO HAVE HIGH RESISTANCE BETWEEN PINS B AND C. R&RD L. DUCT TEMP SWITCH IAW Q400 AMM 36-11-21-000/400-801. ALL FAULTS CLEARED & OPS CKS GOOD IAW Q400 AMM TASK 36-11-00-710-802. AIRCRAFT RETURNED TO SERVICE.