Troubleshooting - Yamaha WR250F 2016 Owner's Service Manual

TROUBLESHOOTING

EAS2GB7380
The fuel pump fails to operate.
TIP
Before troubleshooting, remove the following part(s):
1. Seat
2. Side cover (left/right)
3. Air scoop (left/right)
4. Fuel tank
1. Check the fuse.
Refer to "CHECKING THE FUSES"
on page 9-68.
OK 
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 9-69.
OK 
3. Check the engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 9-64.
OK 
4. Check fuel pressure.
Refer to "CHECKING THE FUEL
PRESSURE" on page 8-5.
OK 
5. Check the fuel pump system wire
harness connections.
Refer to "CIRCUIT DIAGRAM" on
page 9-56.
OK 
Replace the ECU.
NG 
Replace the fuse(s).
NG 
• Clean the battery terminals.
• Recharge or replace the battery.
NG 
Replace the engine stop switch.
NG 
Replace the fuel pump.
NG 
Properly connect or repair the fuel pump
system's wiring.
9-58
FUEL PUMP SYSTEM