Toro Groundsmaster 4300-D - Relays with 5 Terminals

Relayswith5Terminals
g190797
Figure178
1.Hydraulicpumpdriveshaft3.Startrelay
2.EGRrelay
g034753
Figure179
1.Coilterminal
3.Normallyopenterm
2.Normallyclosedterm
4.Commonterminal
TheGroundsmaster4300-Dmachineuses2identicalelectricalrelaysthat
have5terminals.Atagnearthewireharnessrelayconnectorcanbeused
toidentifyeachrelay.
Thestartrelayisusedintheenginestartingcircuit.Whenenergizedbythe
engineECU,thestartrelayprovidesacurrentpathtoenergizetheengine
startersolenoid.
TheEGRrelayisusedtoprovidecurrenttotheengineEGRvalvewhen
energizedbytheengineECU.
ThestartrelayandEGRrelayareattachedtoaframebracketunderthehood
nexttothehydraulicpumpdriveshaft(Figure178).
Groundsmaster
®
4300-D
Page5–71
ElectricalSystem:TestingtheElectricalComponents
16226SLRevC