Relay (Five Terminals) - Toro Workman HDX Service Manual

Relay (Five Terminals)

Workman HD series vehicles use a number of relays that
have five (5) terminals:
The clutch relay on Workman HD, HDX and HDX--D ve-
hicles ensures that the clutch pedal is depressed before
the engine starter can be engaged.
The start relay on Workman HD, HDX and HDX--D ve-
hicles is used to energize the starter solenoid so that the
engine can be started.
The fan relay on Workman HDX and HDX--D vehicles
causes the engine cooling fan to rotate when the relay
is energized.
The fuel pump relay on Workman HDX vehicles allows
current to the fuel pump when the relay is energized.
The kill relay on Workman HD vehicles allows the engine
to run as long as the relay is energized. If the ignition
switch is in the OFF position or the transmission lockout
switches are all open, the relay will not be energized and
the engine will cease running.
The differential and differential delay relays on Workman
HDX and HDX--D 4WD vehicles are used to make sure
that the front wheel drive differential solenoid is not ener-
gized when the clutch is disengaged during engine start-
ing and transaxle shifting.
The clutch relay and differential relays (if equipped) are
located behind the dash panel. The other relays are at-
tached to the relay bracket under the right side of the bed
near the rear axle (Fig. 21).
Testing
1. Park machine on a level surface and apply parking
brake. If relay is located on relay bracket, raise bed and
install bed support on bed lift cylinder to prevent bed
from lowering. Stop engine and remove key from ignition
switch.
2. Locate relay that is to be tested and disconnect the
wire harness connector from the relay. Remove relay
from machine for easier testing.
NOTE: Prior to taking small resistance readings with a
digital multimeter, short the meter test leads together.
The meter will display a small resistance value (usually
0.5 ohms or less). This resistance is due to the internal
resistance of the meter and test leads. Subtract this val-
ue from from the measured value of the component you
are testing.
3. Using a multimeter (ohms setting), measure coil re-
sistance between terminals 85 and 86 (Fig. 22). Resist-
ance should be between 70 and 90 ohms.
Workman HD Series
4. Connect multimeter (ohms setting) leads to relay ter-
minals 30 and 87 (Fig. 22). Ground terminal 86 and apply
+12 VDC to terminal 85. The relay should make and
break continuity between terminals 30 and 87 as +12
VDC is applied and removed from terminal 85.
5. Disconnect voltage from terminal 85 and multimeter
lead from terminal 87.
6. Connect multimeter (ohms setting) leads to relay ter-
minals 30 and 87A. Apply +12 VDC to terminal 85. The
relay should make and break continuity between termi-
nals 30 and 87A as +12 VDC is applied and removed
from terminal 85.
7. Disconnect voltage and multimeter leads from the
relay terminals.
8. Replace relay if testing determines that relay is faulty.
9. After testing is complete, secure relay to machine
and connect wire harness connector to relay.
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HDX MODELS
1. Start relay
2. Fan relay
Page 8 - - 17
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3
1
HDX- -D MODELS
1
4
HD MODELS
Figure 21
3. Fuel pump relay
4. Kill relay
86 87A 87
85 30
Figure 22
Electrical System
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