Start And Egr Relays - Toro Groundsmaster 7210 Service Manual

Start and EGR Relays

Testing the Start or EGR Relays
Groundsmaster 7210
16222SL Rev C
g034747
1. Start relay
2. EGR relay
g034753
1. Coil terminal
2. Normally closed term
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
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.
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
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.
Figure 165
3. ECU bracket
4. ECU
Figure 166
3. Normally open term
4. Common terminal
Servicing the Battery (page
Page 5–41 Electrical System: Testing the Electrical Components
(Figure 165).
5–61).