Toro Groundsmaster 5900 Series - Throttle Switch

ThrottleSwitch
1
2
g288509
Figure214
1.Operatorcontrolconsole
2.Throttleswitch
Thethrottleswitchislocatedontheconsolearm(Figure214).Whenthefront
ofthethrottleswitchisdepressedandheld,theenginerpmwillincreasetoits
HIGHidlesetting.Whentherearofthethrottleswitchisdepressedandheld,
theenginerpmwilldecreasetoitsLOWidlesetting.Ifthethrottleswitchis
depressedmomentarily,theenginespeedwillincreaseordecreasein100RPM
incrementsaccordingly.
Theenginespeedswitchisusedasaninputfortheengineelectroniccontrolunit
toraiseorlowertheenginespeed.Whentheswitchisdepressedandheldinthe
forwardposition,theenginespeedwillincrease.Conversely,whentherearof
theswitchisdepressed,enginespeedwilldecrease.
Themastercontrollermonitorsthepositionofthethrottleswitch(increase
ordecrease).Usinginputfromthethrottleswitchthemastercontroller
communicatesthedesiredchangeinengineRPMtotheYanmarECUviathe
CANnetwork.TheYanmarECUadjuststheenginethrottlearequested.
Testing
1.Parkmachineonalevelsurface,lowercuttingdecksandstopengine.
Removekeyfromkeyswitch.
2.Turnbattery−disconnectswitchtotheOFFposition.
3.Disassembletheconsolearmtogainaccesstotheswitch(seeConsole
Arm(page7–35)).
4.Disconnectmachinewireharnessconnectorfromtheswitchbeingtested.
g288510
Figure215
BackofSwitch
5.TheswitchterminalsaremarkedasshowninFigure215.Thecircuitlogic
ofthethrottleswitchisshowninbelowtable.Withtheuseofamultimeter
(ohmssetting),theswitchfunctionsmaybetestedtodeterminewhether
continuityexistsbetweenthevariousterminalsforeachswitchposition.
Verifycontinuitybetweenswitchterminals.
ElectricalSystem:ComponentTesting
Page6–74
Groundsmaster
®
5900&5910
16227SLRevB