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EngineRelayswith5Terminals(GasolineEngine)

g228830

Figure260

1.Enginepowercenter3.Powerrelay

2.Startrelay

4.Fuelpumprelay

TheengineelectricalsysteminmachineswithaKubotagasolineengineincludes

3electricalrelaysthathave5terminals.Theserelaysareinstalledintheengine

powercenterlocatedontheengine(Figure260).

Thestartrelayisusedtoprovidecurrenttotheenginestartersolenoid.Thestart

relayisenergizedbytheengineECU.

Thepowerrelayisusedtoprovideelectricalpowertoseveralengineelectrical

componentswhenenergizedbytheengineECU.

Thefuelpumprelayisusedtoprovideelectricalpowertothefuelpumpwhen

energizedbytheengineECU.

Note:AnenginefaultcodemaybedisplayedontheInfoCenterDisplayifthe

powerrelay,fuelpumprelayorcircuitwiringisdamaged.

TestingtheEngineRelayswith5Terminals

1.Parkmachineonalevelsurface,lowercuttingunits,shutofftheengine,

applyparkingbrakeandremovekeyfromkeyswitch.

2.Raiseandsupporthoodtoaccessenginerelays.Removeenginepower

centercoverandlocaterelay(s)tobetested.Removerelayfromtheengine

powercenterfortesting.

Note:Priortotakingsmallresistancereadingswithadigitalmultimeter,short

themetertestleadstogether.Themeterwilldisplayasmallresistancevalue

(usually0.5ohmsorless).Thisresistanceisduetotheinternalresistance

ofthemeterandtestleads.Subtractthisvaluefromthemeasuredvalue

ofthecomponentyouaretesting.

ElectricalSystem:TestingtheElectricalComponents

Page7–92

Reelmaster

5410/5510/5610Series

15216SLRevC

Toro 03606A Service Manual

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