Toro Groundsmaster 4300-D - Diode Assemblies

DiodeAssemblies
g034714
Figure190
1.Endofthediodebody
3.Maleterminal
2.Diodeassembly4.Femaleterminal
g190805
Figure191
1.Diode(2each)2.EngineECU
TheelectricalsystemoftheGroundsmaster4300-Dmachineincludes2identical
diodes.Themaximumcurrentallowedthroughanyofthediodesis6A.The
diodeassembliescanbeidentiedbyablackcolor,diodesymbol,andToroPart
Numberontheendofthediodeassemblybody(Figure190).The2diodesplug
intotheenginewireharnessneartheYanmarengineECU(Figure191);referto
theEngineWireHarnessDrawing/DiagraminAppendixA—FoldoutDrawings.
Adiodeassembly(D1)isusedforcircuitprotectionfromthevoltagespikesthat
occurwhentheenginestartersolenoidisde-energized.
Adiodeassembly(D2)isusedtoprotecttheengineECUfromreversepolarityin
theEGRrelaycircuit.
TestingtheDiodeAssembly
1.Parkthemachineonalevelsurface,lowerthecuttingdecks,shutoffthe
engine,settheparkingbrake,andremovethekeyfromthekeyswitch.
2.Locatethediodeassemblythatistobetestedandremovethecabletie
thatsecuresthediodetothewireharness.Unplugthediodefromthewire
harnessfortesting.
Groundsmaster
®
4300-D
Page5–83
ElectricalSystem:TestingtheElectricalComponents
16226SLRevC