Troubleshooting - Toro 74310 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.
Possible Cause
1. The engine is too hot.
2. There is old gas in the gas tank.
3. The fuel-shutoff valve is not open
completely.
4. The air cleaner is dirty.
5. The battery is not charged.
6. Incorrect fuel filters are being used or
the fuel filters are dirty.
7. The connections to the sensors
electronic control unit (ECU) and fuel
injectors are not secured properly.
8. There is low voltage from the battery.
9. A fuse is blown.
1. The blade-control switch (PTO) is
engaged.
2. The parking brake is not engaged.
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 fuel tank is empty.
2. The fuel-shutoff valve is closed.
3. The oil level in the crankcase is low.
4. The throttle is not in the correct
position.
5. There is dirt in the fuel filter.
6. There is dirt, water, or stale fuel in the
fuel system.
7. The air cleaner is dirty.
8. The seat switch is not functioning
properly.
9. The electrical connections are
corroded, loose, or damaged.
10. The relay or switch is worn or
damaged.
11. The spark plug is fouled or improperly
gapped.
12. The spark-plug wire is not connected.
58
Corrective Action
1. Turn the engine off and let it cool.
2. Use new gas.
3. Open the fuel-shutoff valve.
4. Make sure that the air cleaner and
precleaner are clean. Replace if
necessary.
5. Charge or replace the battery.
6. Contact an Authorized Service Dealer.
7. Contact an Authorized Service Dealer.
8. Ensure a good 12 volt battery is being
used and is fully charged.
9. Check and replace any blown fuses.
1. Move the blade-control switch (PTO)
to the disengaged position.
2. Set 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. Fill the fuel tank.
2. Open the fuel-shutoff valve.
3. Add oil to the crankcase.
4. Be sure that the throttle control is
midway between the slow and fast
positions.
5. Replace the fuel filter.
6. Contact an Authorized Service Dealer.
7. Clean or replace the air-cleaner
element.
8. Check the seat-switch indicator.
Replace the seat if necessary.
9. Check the electrical connections
for good contact. Clean the
connector terminals thoroughly with
electrical-contact cleaner, apply
dielectric grease, and make the
appropriate connections.
10. Contact an Authorized Service Dealer.
11. Adjust or replace the spark plug.
12. Check the spark-plug wire connection.
position.