Yamaha Wr250r 2008 Manual

 
SIGNALING SYSTEM 
8-20 
3. Main switch
4. Battery
5. Main fuse
11. Relay unit
13. Neutral switch
15. Fuel pump
16. ECU
23. Coolant temperature sensor
24. Speed sensor
30. Neutral indicator light
31. Coolant temperature warning light
33. Fuel level warning light
35. Turn signal indicator light
36. Turn signal relay
37. Turn signal switch
38. Rear right turn signal light
39. Front right turn signal/position light
40. Front left turn signal/position light
41. Rear left turn signal light
45. Horn
46. Horn...

 
SIGNALING SYSTEM 
8-21 
EAS27290 
TROUBLESHOOTING 
 
Any of the following fail to light: turn signal light, brake light, turn signal indicator light and fuel level
warning light. 
 
The horn fails to sound. 
 
The speedometer does not operate normally. 
 
The fuel indicator light does not come on. 
 
The coolant temperature warning light does not operate normally.
NOTE:
 
Before troubleshooting, remove the following part (s):
1. Seat
2. Side cover (left)
3. Air scoop (left/right) 
4. Fuel tank 
....

 
SIGNALING SYSTEM 
8-22 
The br
ake light fails to come on.
The turn signal light, turn signal indicator light or both fail to blink.
The neutral indicator light fails to come.
This circuit is OK.
1. Check the front brake light switch.
Refer to 
 
“CHECKING THE 
SWITCHES” on page 8-63 
.NG 
→ 
Replace the front brake light switch.
OK 
↓ 
2. Check the rear brake light switch.
Refer to  
“CHECKING THE 
SWITCHES” on page 8-63 
.NG 
→ 
Replace the rear brake light switch.
OK 
↓ 
3. Check the entire...

 
SIGNALING SYSTEM 
8-23 
The speedometer fails to operate.
The fuel level warning light fails to come.
The coolant temperature warning light fails to operate.
3. Check the entire signaling system
 
’ 
s 
wiring.
Refer to  
“CIRCUIT DIAGRAM” on page 
8-19 
.NG 
→ 
Properly connect or repair the signaling
system 
’ 
s wiring.
OK 
↓ 
Replace the meter assembly. 
1. 
Check the speed sensor.
Refer to  
“CHECKING THE SPEED 
SENSOR” on page 8-77 
.NG 
→ 
Replace the speed sensor.
OK 
↓ 
2. Check the entire...

 
SIGNALING SYSTEM 
8-24 

 
COOLING SYSTEM 
8-25 
EAS27300 
COOLING SYSTEM 
EAS27310 
CIRCUIT DIAGRAM 

 
COOLING SYSTEM 
8-26 
3. Main switch
4. Battery
5. Main fuse
16. ECU
23. Coolant temperature sensor
52. Radiator fan motor relay
53. Radiator fan motor
56. Ignition fuse
57. Radiator fan fuse 

 
COOLING SYSTEM 
8-27 
EAS27320 
TROUBLESHOOTING 
 
The radiator fan fails to operate.
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 
.NG 
→ 
Replace the fuse (s).
OK 
↓ 
2. Check the battery.
Refer to  
“CHECKING AND CHARG-
ING THE BATTERY” on page 8-68 
.NG 
→ 
 
Clean the...

 
COOLING SYSTEM 
8-28 

 
FUEL INJECTION SYSTEM 
8-29 
EAS27330 
FUEL INJECTION SYSTEM 
EAS27340 
CIRCUIT DIAGRAM