Toro Greensmaster TriFlex 3400 - Fault 51: Alternator Failure

Fault51:AlternatorFailure
InfoCenterDisplay:
____FAULT#51____
ALTERNATOR
FaultDescription
TheTECcomparessystemvoltagedatainconjunctionwithS/Grpmdata,anddeterminesthealternator
isnotperforming.
CircuitDescription
ThechargecircuitrelayusedonGreensmaster3320machinesprovidesacurrentpathforalternatoroutput
toreachthemachine’selectricalsystem.ThechargecircuitrelayisenergizedbytheprimaryTECwhenthe
keyswitchisineithertheRUNorSTARTposition.
RecommendedServiceActions
Step1:Verifythatthefaultrepeats.
1.ClearthesystemfaultsfromtheInfoCenter.RefertoClearingFaultsfromtheInfoCenter(page19).
2.Operatethemachine.
Pass
Thefaultdidnotrepeat.GotoReturningtheMachinetoService(page21)andfollowthestepslisted.
Note:Ifthefaultdoesnotrepeat,anisolatedeventhasoccurred.
Fail
Thefaultrepeated.GotoStep2.
Step2:Checkthevoltageofthebatterywiththeenginerunning.
1.Starttheengine
2.Monitorthe12Vbatteryvoltageusingamultimeter.
Pass
Thebatteryvoltageisbetween11.5Vto14.5V.GotoStep3.
FailThebatteryvoltageisnotbetween11.5Vand14.5V.ReplacethealternatorasshownintheEngine
chapteroftheGreensmasterTriFlex3320/3420ServiceManual,thengotoReturningtheMachineto
Service(page21)andfollowthestepslisted.
Step3:Checkthecontinuityofthealternatorwirefeedingbackinto
theTECcontroller.
1.DisconnectconnectorP1attheTECcontroller.
2.Locatethewhitewireatinput12.
3.UnplugthealternatoratconnectorP12.
4.LocatethewhitewireintheP12alternatorharnessplugconnector.
5.Usingamultimeter,testforcontinuitybetweenbothendsofthewhitewire.
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