Cooling System Troubleshooting - Yamaha YZF-R25 Service Manual

EAS30503
TROUBLESHOOTING
The radiator fan motor fails to turn.
TIP
• Before troubleshooting, remove the following part(s):
1. Passenger seat
2. Center cover
3. Rider seat
4. Side covers
5. Fuel tank
6. Front panel (left)
7. Front bottom cowling
1. Check the fuses.
(Ignition, backup, radiator fan mo-
tor, and main)
Refer to "CHECKING THE FUS-
ES" on page 8-81.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-82.
OK ↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-77.
OK ↓
4. Check the radiator fan motor.
Refer to "CHECKING THE RADIA-
TOR FAN MOTOR" on page 8-92.
OK ↓
5. Check the radiator fan motor relay.
Refer to "CHECKING THE RE-
LAYS" on page 8-85.
OK ↓
6. Check the coolant temperature sen-
sor.
Refer to "CHECKING THE COOL-
ANT TEMPERATURE SENSOR"
on page 8-92.
OK ↓
NG →
Replace the fuse(s).
NG →
• Clean the battery terminals.
• Recharge or replace the battery.
NG →
Replace the main switch.
NG →
Replace the radiator fan motor.
NG →
Replace the radiator fan motor relay.
NG →
Replace the coolant temperature sensor.
8-29
COOLING SYSTEM