Toro 03708N - Diagnostic Ace Display; Checking the Interlock 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,thePTOswitchisin
theOFFposition,andtheliftswitchisintheNeutral
position.Inaddition,theengineshouldstopwhenthe
tractionpedalispressedwithoperatoroffoftheseator
iftheparkingbrakeisleftengaged.
CAUTION
Ifsafetyinterlockswitchesaredisconnectedor
damagedthemachinecouldoperateunexpectedly
causingpersonalinjury.
•Donottamperwiththeinterlockswitches.
•Checktheoperationoftheinterlockswitches
dailyandreplaceanydamagedswitchesbefore
operatingthemachine.
VerifyingtheInterlockSwitchFunction
1.Parkthemachineonalevelsurface,lowerthe
cuttingunits,stoptheengine,andengagethe
parkingbrake.
2.Removetheaccesspanellocatedbeneaththefront
oftheseat(
Figure39).
3.Locatethewireharnessandconnectorsnearthe
controller(Figure39).
Figure39
1.Wireharnessandconnectors
4.Carefullyunplugloopbackconnectorfromharness
connector.
5.ConnecttheDiagnosticACEdisplayconnectorto
theharnessconnector(
Figure40).
Note:Makesurecorrectoverlaydecalispositioned
onDiagnosticACEdisplay.
Figure40
1.DiagnosticACE
6.TurnthekeyswitchtotheOnposition,butdonot
startthemachine.
Note:Theredtextontheoverlaydecalrefersto
inputswitchesandthegreentextreferstooutputs.
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