Troubleshooting - Yamaha WR250R Service Manual

EAS27320

TROUBLESHOOTING

The radiator fan fails to operate.
G
NOTE:
Before troubleshooting, remove the following part (s):
1. Seat
2. Side cover (left)
3. Air scoop (left/right)
4. Fuel tank
5. Radiator cover
6. Drain the coolant.
1. Check the fuses.
(Main, ignition and radiator fan fuse)
Refer to
"CHECKING THE FUSES" on
.
page 8-67
OK↓
2. Check the battery.
Refer to
"CHECKING AND CHARG-
ING THE BATTERY" on page 8-68
OK↓
3. Check the main switch.
Refer to
"CHECKING THE
SWITCHES" on page 8-63
OK↓
4. Check the radiator fan motor relay.
Refer to
"CHECKING THE RELAYS"
.
on page 8-71
OK↓
5. Check the radiator fan motor.
Refer to
"CHECKING THE RADIATOR
FAN MOTOR" on page 8-79
OK↓
6. Check the coolant temperature.
Refer to
"CHECKING THE COOLANT
TEMPERATURE SENSOR" on page
.
8-78
OK↓
7. Check the entire cooling system
wiring.
Refer to
"CIRCUIT DIAGRAM" on page
.
8-25
OK↓
Replace the ECU.
→
NG
→
NG
.
→
NG
.
→
NG
→
NG
.
→
NG
s
'
→
NG
8-27
COOLING SYSTEM
Replace the fuse (s).
Clean the battery terminals.
G
Recharge or replace the battery.
G
Replace the main switch.
Replace the radiator fan motor relay.
The radiator fan motor is faulty and must
be replaced.
Replace the coolant temperature sensor.
Properly connect or repair the cooling
system s wiring.
'