Troubleshooting - Toro 74933 Operator's Manual

Troubleshooting

Problem
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. Faulty valve in fuel tank.
3. The air cleaner is dirty.
4. The battery is not charged.
5. The connections to
sensors-electronic-control-unit
(ECU) and fuel injectors are not
secured properly.
6. Low voltage coming from the battery.
7. A fuse is blown.
1. The blade-control switch (PTO) is
.
ENGAGED
2. The parking brake is not on.
3. The drive levers are not in
- position.
NEUTRAL 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 defective.
1. The fuel 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 faulty.
7. The relay or switch is defective.
8. The spark plug is faulty.
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 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 air passages
above the engine are plugged.
65
Corrective Action
1. Shut off the engine and let it cool.
2. Contact an Authorized Service Dealer.
3. Ensure 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 you are using a good 12 V
battery and it is fully charged.
7. Check and replace the blown fuses.
1. Move the blade-control switch (PTO)
to .
DISENGAGED
2. Set the parking brake.
3. Ensure that the drive levers are in the
- position.
NEUTRAL 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. Add oil to the crankcase.
3. Be sure that the throttle control is
midway between the
SLOW
positions.
4. Clean or replace the air cleaner
element.
5. Check the seat switch indicator.
Replace the seat if needed.
6. Check the electrical connections for
good contact. Clean the connector
terminals thoroughly with electrical
contact cleaner, apply dielectric
grease, and reconnect.
7. Contact an Authorized Service Dealer.
8. Clean, adjust, or replace 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 air passages.
1. Reduce the ground speed.
2. Add oil to the crankcase.
3. Remove the obstruction from the
cooling fins and air passages.
and
FAST