Troubleshooting; Troubleshooting - Toro GREENSMASTER 3100 Service Manual

Troubleshooting

CAUTION
Remove all jewelry, especially rings and
watches, before doing any electrical trou-
bleshooting. Disconnect battery cables un-
less the test requires battery voltage.
For effective troubleshooting and repairs, you must
have a good understanding of the electrical circuits and
components used. Tools such as a volt/ohm multimeter
will help find problems in the circuitry.
Condition
1. Engine starts (but should not)
when shift selector is in gear.
2. Engine starts (but should not)
when mow pedal is depressed
(reels engaged).
3. Engine fails to crank, regard-
less of shift selector or mow
pedal position.
4. Engine fails to crank with con-
trols in "neutral" when operator is
off seat, but does crank when op-
erator is on seat.

Troubleshooting

Studying the operating characteristics preceding an
electrical failure will help in identifying the area of diffi-
culty. Try to isolate the failure to a specific functional
system; then check that area, repairing one component
at a time. Attempting to repair two systems at once will
lead to confusion.
NOTE: The interlock switches are described as nor-
mally open (NO) or normally closed (NC). The NC-NO
description indicates the switch contact position with the
switch installed in the machine with MOW OFF,
TRANSMISSION in NEUTRAL, and OPERATOR OFF
of seat. Should the machine being repaired have these
components by-passed, they should be reconnected for
proper troubleshooting and safety.
Cause
Traction switch adjusted incorrectly
or is malfunctioning.
Mow/lift switch adjusted incorrectly
or is malfunctioning.
Mow/lift switch and/or traction
switch out of adjustment or mal-
functioning.
Loose or corroded battery connec-
tions.
Mow/lift switch or traction switch
wires are loose.
Battery is dead.
Starter solenoid is malfunctioning.
Ignition switch is malfunctioning.
Starter is malfunctioning.
Engine is seized.
Key switch, ammeter or solenoid
wires loose.
Wiring harness connected wrong.
Wiring harness malfunctioning.
Page 5 - 6
Correction
Adjust or replace traction switch.
Adjust or replace mow/lift switch.
Adjust or replace traction switch
and/or mow/lift switch.
Clean and tighten connections.
Check wires and connect prop-
erly.
Charge or replace battery.
Replace solenoid.
Replace ignition switch.
Replace or repair starter.
Repair engine.
Connect wires.
Connect wiring harness correctly:
refer to Electrical Schematic.
Install new wiring harness.
Greensmaster
®
3100