Cooling System Troubleshooting - Yamaha R1 Series 2015 Service Manual

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 and radiator
fan motor)
Refer to "CHECKING THE FUSES"
on page 8-180.
OK
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-181.
OK
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-177.
OK
4. Check the radiator fan motor.
Refer to "CHECKING THE RADIA-
TOR FAN MOTORS" on page
8-190.
OK
5. Check the radiator fan motor relay.
Refer to "CHECKING THE RE-
LAYS" on page 8-184.
OK
6. Check the coolant temperature sen-
sor.
Refer to "CHECKING THE COOL-
ANT TEMPERATURE SENSOR"
on page 8-190.
OK
7. Check the entire cooling system's
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-39.
OK
Replace the ECU.
Refer to "REPLACING THE ECU (En-
gine Control Unit)" on page 8-180.
Replace the fuse(s).
NG
• Clean the battery terminals.
• Recharge or replace the battery.
NG
Replace the main switch/immobilizer unit.
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.
NG
8-43
COOLING SYSTEM