Toro Reelmaster 3550 - Understanding the Diagnostic ACE Display; Checking the Interlock Switches

g020251
Figure36
1.Diagnosticlight
Whenthecontrollerdiagnosticlightblinks,oneofthe
followingproblemshasbeendetectedbythecontroller:
•1oftheoutputshasbeenshorted.
•1oftheoutputsisopencircuited.
Usingthediagnosticdisplay,determinewhichoutputis
malfunctioning;refertoCheckingtheInterlockSwitches
(page28).
Ifthediagnosticlightisnotilluminatedwhenthekeyswitchis
intheONposition,thisindicatesthattheelectroniccontroller
isnotoperating.Possiblecausesareasfollows:
•Loop-backisnotconnected
•Thelightisburnedout.
•Fusesareblown.
•Itisnotfunctioningcorrectly.
Checktheelectricalconnections,inputfuses,and
diagnosticlightbulbtodeterminethemalfunction.
Ensurethattheloop-backconnectorissecuredtothe
wireharnessconnector.
UnderstandingtheDiagnostic
ACEDisplay
Themachineisequippedwithanelectroniccontrollerwhich
controlsmostmachinefunctions.Thecontrollerdetermines
whatfunctionisrequiredforvariousinputswitches(i.e.,seat
switch,keyswitch,etc.)andturnsontheoutputstoactuate
solenoidsorrelaysfortherequestedmachinefunction.
Fortheelectroniccontrollertocontrolthemachineas
desired,eachoftheinputswitches,outputsolenoids,and
relaysmustbeconnectedandfunctioningproperly.
UsetheDiagnosticACEdisplaytohelpverifyandcorrect
electricalfunctionsofthemachine.
CheckingtheInterlock
Switches
ServiceInterval:Beforeeachuseordaily
Thepurposeoftheinterlockswitchesistopreventtheengine
fromcrankingorstartingunlessthetractionpedalisinthe
NEUTRALposition,theEnable/Disableswitchisinthe
DISABLEposition,andtheLowerMow/Raisecontrolisin
theNEUTRALposition.Inaddition,theengineshouldshut
offwhenyoupressthetractionpedalwithnooneintheseat
oriftheparkingbrakeisengaged.
CAUTION
Ifsafetyinterlockswitchesaredisconnectedor
damaged,themachinecouldoperateunexpectedly,
causingpersonalinjury.
•Donottamperwiththeinterlockswitches.
•Checktheoperationoftheinterlockswitches
dailyandreplaceanydamagedswitchesbefore
operatingthemachine.
VerifyingtheInterlockSwitchFunction
1.Parkthemachineonalevelsurface,lowerthecutting
units,engagetheparkingbrake,andshutofftheengine.
2.Removethecoverfromthecontrolpanel.
3.Locatethewireharnessandloop-backconnector
(Figure37).
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Figure37
1.Loop-backconnector
4.Carefullyunplugtheloop-backconnectorfromthe
harnessconnector.
5.ConnecttheDiagnosticACEdisplayconnectortothe
harnessconnector(Figure38).
Note:Ensurethatthecorrectoverlaydecalis
positionedontheDiagnosticACEdisplay.
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