Toro 03691 - Diagnostic Ace Display; Checking the Interlock Switches

turnonsteadyuntilthekeypositionischanged.The
lightwillblinkifthecontrollerdetectsamalfunctionin
theelectricalsystem.Thelightwillstopblinkingand
automaticallyresetwhenthekeyswitchisturnedtothe
Offpositiononcethefaulthasbeenresolved.
Figure47
1.Diagnosticlight
Whenthecontrollerdiagnosticlightblinks,oneofthe
followingproblemshasbeendetectedbythecontroller:
•Oneoftheoutputshasbeenshorted.
•Oneoftheoutputsisopencircuited.
Usingthediagnosticdisplay,determinewhichoutput
ismalfunctioning;refertoCheckingtheInterlock
Switches.
Ifthediagnosticlightisnotilluminatedwhenthekey
switchisintheOnposition,thisindicatesthatthe
electroniccontrollerisnotoperating.Possiblecauses
areasfollows:
•Loop-backisnotconnected.
•Thelightisburnedout.
•Fusesareblown.
•Itisnotfunctioningcorrectly.
Checktheelectricalconnections,inputfuses,and
diagnosticlightbulbtodeterminethemalfunction.
Ensurethattheloop-backconnectorissecuredtothe
wireharnessconnector.
DiagnosticAceDisplay
Themachineisequippedwithanelectroniccontroller
whichcontrolsmostmachinefunctions.Thecontroller
determineswhatfunctionisrequiredforvariousinput
switches(i.e.seatswitch,keyswitch,etc.)andturns
ontheoutputstoactuatesolenoidsorrelaysforthe
requestedmachinefunction.
Fortheelectroniccontrollertocontrolthemachineas
desired,eachoftheinputswitches,outputsolenoids,
andrelaysmustbeconnectedandfunctioningproperly.
UsetheDiagnosticACEdisplaytohelpverifyand
correctelectricalfunctionsofthemachine.
CheckingtheInterlock
Switches
Thepurposeoftheinterlockswitchesistopreventthe
enginefromcrankingorstartingunlessthetraction
pedalisintheNeutralposition,theEnable/Disable
switchisintheDisableposition,andtheLower
Mow/RaisecontrolisintheNeutralposition.In
addition,theengineshouldstopwhenthetraction
pedalispressedwithoperatoroffoftheseatorifthe
parkingbrakeisleftengaged.
Ifsafetyinterlockswitchesaredisconnected
ordamagedthemachinecouldoperate
unexpectedlycausingpersonalinjury.
•Donottamperwiththeinterlockswitches.
•Checktheoperationoftheinterlock
switchesdailyandreplaceanydamaged
switchesbeforeoperatingthemachine.
VerifyingtheInterlockSwitchFunction
1.Parkthemachineonalevelsurface,lowerthe
cuttingunits,stoptheengine,andengagethe
parkingbrake.
2.Removetheaccesspanelfromthesideofthe
controlarm.
3.Locatethewireharnessandconnectorsnearthe
controller(Figure48).
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