Yamaha MT-09 2021 - Troubleshooting

8-49
FUEL PUMP SYSTEM
EAS30514
TROUBLESHOOTING
If the fuel pump fails to operate.
TIP
• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Fuel tank side cover
3. Fuel tank center cover
4. Fuel tank
1. Check the fuses.
(Main, ignition 1, backup 2, and
fuel injection system)
Refer to “CHECKING THE FUS-
ES” on page 8-55.
NG→ Replace the fuse(s).
OK↓
2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 8-56.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
3. Check the main switch.
Refer to “CHECKING THE
SWITCHES” on page 8-53.
NG→ Replace the main switch/immobilizer unit.
OK↓
4. Check the stop/run/start switch.
Refer to “CHECKING THE
SWITCHES” on page 8-53.
NG→ Replace the handlebar switch (right).
OK↓
5. Check the relay unit (fuel pump re-
lay).
Refer to “CHECKING THE RE-
LAYS” on page 8-56.
NG→ Replace the relay unit.
OK↓
6. Check the fuel pump.
Refer to “CHECKING THE FUEL
PUMP OPERATION” on page 7-3.
NG→ Replace the fuel pump.
OK↓
7. Check the entire fuel pump sys-
tem’s wiring.
Refer to “CIRCUIT DIAGRAM” on
page 8-45.
NG→
Properly connect or repair the fuel pump
system’s wiring.
OK↓