Toro 30534 - Checking the Interlock Switches

CheckingtheInterlock
Switches
4WheelDriveonly
Thepurposeoftheinterlockswitchesistopreventtheengine
fromcrankingorstartingunlessthetractionpedalisinthe
Neutralposition,thePTOisdisengagedandtheLower
Mow/RaisecontrolisintheNeutralposition.Inaddition,the
engineshouldstopwhenthetractionpedalispressedwith
operatoroffoftheseatoriftheparkingbrakeisleftengaged.
CAUTION
Ifsafetyinterlockswitchesaredisconnectedor
damagedthemachinecouldoperateunexpectedly
causingpersonalinjury.
•Donottamperwiththeinterlockswitches.
•Checktheoperationoftheinterlockswitches
dailyandreplaceanydamagedswitchesbefore
operatingthemachine.
VerifyingtheInterlockSwitchFunction
1.Parkthemachineonalevelsurface,lowerthecutting
decks,stoptheengine,andengagetheparkingbrake.
2.Raisetheseat.
3.Locatethewireharnessandconnectorsnearthe
controller(
Figure27).
4.Carefullyunplugloopbackconnectorfromharness
connector.
Figure27
1.Wireharnessandconnectors
5.ConnecttheDiagnosticACEdisplaytoolconnectorto
theharnessloopbackconnector(Figure28).
Note:Makesurecorrectoverlaydecalispositioned
onDiagnosticACEdisplay.
Figure28
1.DiagnosticACE
6.TurnthekeyswitchtotheOnposition,butdonot
startthemachine.
Note:Theredtextontheoverlaydecalreferstoinput
switchesandthegreentextreferstooutputs.
7.The“inputsdisplayed”LED,onthelowerright
columnoftheDiagnosticACE,shouldbeilluminated.
Ifthe“outputsdisplayed”LEDisilluminated,press
thetogglebutton,onDiagnosticACE,tochangeLED
to“inputsdisplayed”.
TheDiagnosticACEwillilluminatetheLEDassociated
witheachoftheinputswhenthatinputswitchisclosed.
8.Individually,changeeachoftheswitchesfromopen
toclosed(i.e.,sitonseat,engagetractionpedal,etc.),
andnotethattheappropriateLEDonDiagnosticACE
willblinkonandoffwhencorrespondingswitchis
closed.Repeatthisforallswitchesthatyoucanchange
byhand.
9.IfaswitchisclosedandtheappropriateLEDdoesnot
turnon,checkallwiringandconnectionstotheswitch
and/orchecktheswitchwithanohmmeter.Replace
anydefectiveswitchandrepairanydefectivewiring.
Note:TheDiagnosticACEalsohastheabilitytodetect
whichoutputsolenoidsorrelaysareturnedon.Thisisa
quickwaytodetermineifamachinemalfunctioniselectrical
orhydraulic.
VerifyingOutputFunction
1.Parkthemachineonalevelsurface,lowerthecutting
deck,stoptheengine,andengagetheparkingbrake.
2.Raisetheseat.
3.Locatewireharnessandconnectorsnearcontroller.
4.Carefullyunplugloopbackconnectorfromharness
connector.
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