When stop idle jump to 1200rpm

Hi I have a problem with my Scion tc 2006 automatic .Onlny When I stop on the light idle going down but not stay and jupm to 1200rpm ..once ,then they fall back and stay in normal place . I"ve tred everything already.Clean throttle body new throttle body ,reset ECM 1000times .the problem was permanenet . Computer it doesn't show errors.The Problem apperared after cleaning throttle body .I didn't dosconnect the battery , start engine and idle has gone to max and they didn't want to fall.Wel I turn off engine and disconnect battery then engint start normal but the problem remained .

Second PROBLEM STOPED LEARNING idle ,all electric rest but engine working the same as before the reset.