Toro Groundsmaster 4500-D Series - Page 333

ToroElectronicControllers(TEC)(continued)
IMPORTANT
Whentestingforwireharnesscontinuityattheconnectorforthe
TECcontroller,takecaretonotdamagetheconnectorpinswith
multimetertestleads.Ifconnectorpinsareenlargedordamaged
duringtesting,connectorrepairwillbenecessaryforproper
machineoperation.
ThemachineelectricalschematicandwireharnessdrawingsinChapter9−
FoldoutDrawingscanbeusedtoidentifypossiblecircuitproblemsbetweenthe
controllersandtheinput/outputdevices(e.g.switchesandsolenoidcoils).
BecauseofthesolidstatecircuitrybuiltintotheTECcontrollers,thereisno
methodtotestacontrollerdirectly.Acontrollermaybedamagedifanattemptis
madetotestitwithanelectricaltestdevice(e.g.digitalmultimeterortestlight).
Note:Thetwo(2)TECcontrollersusedontheGroundsmaster4700−Dare
matchedforcorrectmachineoperation.Ifeitherofthesecomponentsare
replacedforanyreason,systemsoftwareneedstobereprogrammedbyyour
ToroDistributor.
IMPORTANT
Beforeperformingweldingonthemachine,disconnectbothpositive
andnegativebatterycablesfromthebattery,disconnectthewire
harnessconnectorfromtheTECcontrollersanddisconnectthe
terminalconnectorfromthealternator.Also,disconnectandremove
theengineECUfromthemachinebeforewelding.Thesestepswill
preventdamagetothemachineelectricalsystemwhenwelding.
g321413
Figure213
1.TECcontroller3.Socketheadscrew
2.Machineharnessconnector
IfthewireharnessconnectorisremovedfromtheTECcontrollerforanyreason,
tightentheharnessconnectorscrewfrom2.8to3.2N·m(25to28in-lb).
Groundsmaster
®
4500-D/4700-D
Page6–51
ElectricalSystem:ComponentTesting
19245SLRevA