Troubleshooting - Yamaha WR250F Owner's Service Manual

TROUBLESHOOTING

EAS2GB2373
The radiator fan motor fails to turn.
TIP
Before troubleshooting, remove the following part(s):
1. Seat
2. Side cover (left)
3. Air scoop (left/right)
4. Fuel tank
1. Check the fuse.
Refer to "CHECKING THE FUSES"
on page 9-68.
OK 
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 9-69.
OK 
3. Check the main relay.
Refer to "CHECKING THE RE-
LAYS" on page 9-72.
OK 
4. Check the radiator fan motor.
Refer to "CHECKING THE RADIA-
TOR FAN MOTOR" on page 9-78.
OK 
5. Check the radiator fan motor relay.
Refer to "CHECKING THE RE-
LAYS" on page 9-72.
OK 
6. Check the coolant temperature sen-
sor.
Refer to "CHECKING THE COOL-
ANT TEMPERATURE SENSOR"
on page 9-78.
OK 
7. Check the entire cooling system's
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 9-16.
OK 
Replace the ECU.
NG 
Replace the fuse(s).
NG 
• Clean the battery terminals.
• Recharge or replace the battery.
NG 
Replace the main relay.
NG 
Replace the radiator fan motor.
NG 
Replace the radiator fan motor relay.
NG 
Replace the coolant temperature sensor.
NG 
Properly connect or repair the cooling sys-
tem's wiring.
9-26
COOLING SYSTEM