Toro Reelmaster 5010- H - Fault 123: Motor over Speed-M;G

Fault123:MotorOverSpeed—M/G
InfoCenterDisplay:
_____ FAULT#123 _____
HISpeed
FaultDescription
Themeasuredspeedofthemotor/generatorhasexceeded3,600rpm.
CircuitDescription
Motor/generatorrpmislimitedbytheelectroniccontrolofthefuelactuatorandtheenginemechanicalgovernor.
Thisfaultisreportedwhenbothofthoserpmlimitingsystemshavefailed,andthemotor/generatorisallowedto
rotateatmorethan3,600rpm.
ConditionsforSettingtheFault
Thisfaultcanonlyoccurwhenthemotor/generatorstopscommunicatingwiththeTEC-5002andthemechanical
enginespeedgovernor(fuelactuator)arebadatthesametime.
RecommendedServiceActions
Step1:Verifythatthefaultrepeats.
1.ClearthesystemfaultsfromtheInfoCenter.RefertoClearingFaultsfromtheInfoCenter(page21).
2.Operatethemachine.
Pass
Thefaultdidnotrepeat.GotoReturningtheMachinetoService(page22)andfollowthestepslisted.
Note:Ifthefaultdoesnotrepeat,anisolatedeventhasoccurred.
Fail
Thefaultrepeated.GotoStep2.
Step2:TesttheCANbuswiringinmainharnessconnectorP37.
Useamultimetertotesttheresistancebetweenthefollowingpairsoflocations:
LocationHarness
Connector
Pin
Wire
Color
Expected
Reading
ConnectorGraphic
1MainP37
5
Yellow
2MainP376
Green
54to66
ohms
430