Yamaha YZF-R1 Series Service Manual page 464

EAS30503
TROUBLESHOOTING
TIP
• Before troubleshooting, remove the following part(s):
1. Front side cowling/Front panel/Side cover bracket/Electrical components tray
2. Rider seat
3. Fuel tank cover
4. Fuel tank
5. Air filter case
6. Throttle bodies
1. Check the fuses.
(Main, ignition, backup, radiator fan
motor and sub radiator fan motor)
Refer to "CHECKING THE FUS-
ES" on page 8-41.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-42.
OK ↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-40.
OK ↓
4. Check the radiator fan motor.
Refer to "CHECKING THE RADIA-
TOR FAN MOTORS" on page 8-48.
OK ↓
5. Check the radiator fan motor relay.
Refer to "CHECKING THE RE-
LAYS" on page 8-42.
OK ↓
6. Check the coolant temperature sen-
sor.
Refer to "CHECKING THE COOL-
ANT TEMPERATURE SENSOR"
on page 8-48.
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