Relays With 5 Terminals - Toro Groundsmaster 4300-D Service Manual

Relays with 5 Terminals

Groundsmaster ® 4300-D
16226SL Rev C
g190797
1. Hydraulic pump driveshaft
2. EGR relay
g034753
1. Coil terminal
2. Normally closed term
The Groundsmaster 4300-D machine uses 2 identical electrical relays that
have 5 terminals. A tag near the wire harness relay connector can be used
to identify each relay.
The start relay is used in the engine starting circuit. When energized by the
engine ECU, the start relay provides a current path to energize the engine
starter solenoid.
The EGR relay is used to provide current to the engine EGR valve when
energized by the engine ECU.
The start relay and EGR relay are attached to a frame bracket under the hood
next to the hydraulic pump driveshaft
Figure 178
3. Start relay
Figure 179
3. Normally open term
4. Common terminal
(Figure 178).
Page 5–71 Electrical System: Testing the Electrical Components