Toro 30856 - Standard Control Module (SCM)

Thisproductisdesignedtodriveobjectsinto
thegroundwheretheyloseenergyquickly
ingrassareas.However,carelessoperation,
combinedwithterrainangle,ricochets,or
improperlypositionedsafetyguardcanleadto
thrownobjectinjuries.
•Whenapersonorpetappearssuddenlyinor
nearthemowingarea,stopmowing.
•Donotresumemowinguntiltheareais
cleared.
Important:Allowenginetoidlefor5minutes
beforeshuttingitoffafterafullloadoperation.
Thisallowstheturbochargertocooldownbefore
shuttingtheengineoff.Failuretodosomaylead
toturbo-chargertrouble.
Beforestoppingtheengine,disengageallcontrolsand
movethethrottletoSlow .MovingthethrottletoSlow
reduceshighengineRPM,noise,andvibration.Turn
thekeytoOfftostoptheengine.
StandardControlModule
(SCM)
TheStandardControlModuleisa"potted"electronic
deviceproducedina"onesizetsall"conguration.
Themoduleusessolidstateandmechanical
componentstomonitorandcontrolstandardelectrical
featuresrequiredforsafeproductoperation.
Themodulemonitorsinputsincludingneutral,parking
brake,PTO,start,backlap,andhightemperature.The
moduleenergizesoutputsincludingPTO,Starter,and
ETR(energizetorun)solenoid.
Themoduleisdividedintoinputsandoutputs.Inputs
andoutputsareidentiedbygreenLEDindicators
mountedontheprintedcircuitboard.
Thestartcircuitinputisenergizedby12VDC.All
otherinputsareenergizedwhenthecircuitisclosedto
ground.EachinputhasaLEDthatisilluminatedwhen
thespeciccircuitisenergized.UsetheinputLED’s
forswitchandinputcircuittroubleshooting.
Outputcircuitsareenergizedbyanappropriatesetof
inputconditions.ThethreeoutputsincludePTO,ETR,
andSTART.OutputLED’smonitorrelaycondition
indicatingthepresenceofvoltageatoneofthree
specicoutputterminals.
Outputcircuitsdonotdetermineoutputdevice
integritysoelectricaltroubleshootingincludesoutput
LEDinspectionandconventionaldeviceandwire
harnessintegritytesting.Measuredisconnected
componentimpedance,impedancethroughwire
harness(disconnectatSCM),orbytemporarily"test
energizing"thespeciccomponent.
TheSCMdoesnotconnecttoanexternalcomputeror
handhelddevice,cannotbere-programmed,anddoes
notrecordintermittentfaulttroubleshootingdata.
ThedecalontheSCMonlyincludessymbols.Three
LEDoutputsymbolsareshownintheoutputbox.
AllotherLED’sareinputs.Figure19identiesthe
symbols.
Figure19
1.Input5.Inseat
9.Output13.Start
2.Backlap
6.PTOswitch10.PTO
14.Power
3.Hightempshutdown
7.Parkbrakeoff11.Start
4.Hightempwarning8.Neutral12.ETR
HerearethelogicaltroubleshootingstepsfortheSCM
device.
1.Determinetheoutputfaultyouaretryingtoresolve
(PTO,START,orETR).
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