Troubleshooting - Toro 74945 Operator's Manual

Troubleshooting

Problem
The malfunction-indicator light (MIL)
comes on.
The starter does not crank.
The engine does not start, starts hard, or
fails to keep running.
The engine loses power.
The engine overheats.
Possible Cause
1. The engine is too hot.
2. There is a faulty valve in the fuel tank.
3. The air cleaner is dirty.
4. The battery is not charged.
5. The connections to the sensors
electronic-control unit (ECU) and fuel
injectors are not secured properly.
6. There is low voltage from the battery.
7. A fuse is blown.
1. The blade-control switch (PTO) is
engaged.
2. The parking brake is disengaged.
3. The motion-control levers are not in
the N - position.
EUTRAL LOCK
4. The operator is not seated.
5. The battery is dead.
6. The electrical connections are
corroded or loose.
7. The fuse is blown.
8. The relay or switch is worn or
damaged.
1. The LPG tank is empty.
2. The oil level in the crankcase is low.
3. The throttle is not in the correct
position.
4. The air cleaner is dirty.
5. The seat switch is not functioning
properly.
6. The electrical connections are
corroded, loose, or damaged.
7. The relay or switch is worn or
damaged.
8. The spark plug is fouled or improperly
gapped.
9. The spark-plug wire is not connected.
1. The engine load is excessive.
2. The air cleaner is dirty.
3. The oil level in the crankcase is low.
4. The cooling fins and the air passages
above the engine are plugged.
1. The engine load is excessive.
2. The oil level in the crankcase is low.
3. The cooling fins and the air passages
above the engine are plugged.
73
Corrective Action
1. Shut off the engine and let it cool.
2. Contact an Authorized Service Dealer.
3. Make sure that the air cleaner and
precleaner are clean. Replace if
necessary.
4. Charge or replace the battery.
5. Contact an Authorized Service Dealer.
6. Ensure that you are using a good 12 V
battery and that it is fully charged.
7. Check and replace any blown fuses.
1. Move the blade-control switch (PTO)
to the disengaged position.
2. Engage the parking brake.
3. Ensure that the motion-control levers
are in the N -
EUTRAL LOCK
4. Sit on the seat.
5. Charge the battery.
6. Check the electrical connections for
good contact.
7. Replace the fuse.
8. Contact an Authorized Service Dealer.
1. Change the LPG tank.
2. Add oil to the crankcase.
3. Be sure that the throttle control is
midway between the slow and fast
positions.
4. Clean or replace the air-cleaner
element.
5. Check the seat-switch indicator.
Replace the seat if necessary.
6. Check the electrical connections
for good contact. Clean the
connector terminals thoroughly with
electrical-contact cleaner, apply
dielectric grease, and make the
appropriate connections.
7. Contact an Authorized Service Dealer.
8. Adjust or replace the spark plug.
9. Check the spark-plug wire connection.
1. Reduce the ground speed.
2. Clean the air-cleaner element.
3. Add oil to the crankcase.
4. Remove the obstruction from the
cooling fins and the air passages.
1. Reduce the ground speed.
2. Add oil to the crankcase.
3. Remove the obstruction from the
cooling fins and the air passages.
position.