Service Manual

ManualsBrandsToro ManualsRiding ProductsReelmaster 5610-D Traction Unit

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Relayswith5Terminals(DieselEngine)

g230517

Figure259

1.Kubotadieselrelays

3.Startrelay

2.Yanmardieselrelays

4.EGRrelay

TheelectricalsysteminmachineswithaKubotaorYanmardieselengine

includeelectricalrelaysthathave5terminals.Atagnearthewireharnessrelay

connectorcanbeusedtoidentifyeachrelay.

Thestartrelayisusedtoprovidecurrenttotheenginestartersolenoid.On

machineswithaKubotadieselengine,thestartrelayisenergizedbytheToro

ElectronicController(TEC).ThestartrelayisenergizedbytheengineECUon

machineswithaYanmardieselengine.

TheEGRrelayisusedonmachineswithaYanmardieselenginetoprovide

currenttotheengineEGRvalvewhenenergizedbytheengineECU.

ThestartrelayandEGRrelayareattachedtoaframebracketunderthehood

nexttothehydraulicpumpdriveshaft(Figure259).

Note:AfaultcodemaybedisplayedontheInfoCenterdisplayifthestartrelay,

EGRrelayorcircuitwiringisdamaged.

TestingtheRelayswith5Terminals

1.Parkthemachineonalevelsurface,lowerthecuttingunits,shutoffthe

engine,settheparkingbrake,andremovethekeyfromthekeyswitch.

2.Openthehoodtogetaccesstotherelays.Removethehoodsaddlefrom

themachineforeasieraccesstorelay.

3.Ensurethatthemachineoperationdoesnotoccurunexpectedly,disconnect

thenegative(-)cablefromthebatteryandthendisconnectthepositive(+)

cablefromthebattery;refertoServicingtheBattery(page7–125).

4.Locatetherelaythatistobetested.

5.Disconnectthewireharnesselectricalconnectorfromtherelay.Removethe

relayfromthemountingbracketfortesting.

Note:Beforetakingthesmallresistancereadingswithadigitalmultimeter,

shortthemultimetertestleadstogether.Themeterdisplaysasmall

resistancevalue(usually0.5ohmsorless).Thisresistanceisbecauseofthe

internalresistanceofthemultimeterandtestleads.Subtractthisvaluefrom

themeasuredvalueofthecomponentthatyouaretesting.

ElectricalSystem:TestingtheElectricalComponents

Page7–90

Reelmaster

5410/5510/5610Series

15216SLRevD