Toro Groundsmaster 7210, Service Manual

Page: 237 / 342

Start and EGR Relays
g034747
Figure 165
1. Start relay 3. ECU bracket
2. EGR relay 4. ECU
g034753
Figure 166
1. Coil terminal 3. Normally open term
2. Normally closed term
4. Common terminal
The Groundsmaster 7210 machine uses 2 identical relays that have 5 terminals
to control power to the starter motor solenoid and EGR valve of the engine. The
relays are attached to the ECU bracket above the battery (
Figure 165 ).
The start relay supplies power to the engine starter motor solenoid when
energized by the engine ECU.
The EGR relay supplies power to the engine EGR valve when energized by
the engine ECU.
Testing the Start or EGR Relays
1. Park the machine on a level surface, lower the cutting deck, shut off the
engine, set the parking brake, and remove the key from the key switch.
2. Unlatch the hood and raise it.
3. Ensure that the machine operation does not occur unexpectedly, disconnect
the negative (-) cable from the battery and then disconnect the positive (+)
cable from the battery; refer to
Servicing the Battery (page 5–61) .
4. Locate the relay that you are testing.
5. Disconnect the wire harness connector from the relay, and remove the relay
from the mounting bracket for testing.
Groundsmaster 7210 Page 5–41 Electrical System: Testing the Electrical Components
16222SL Rev C