Yamaha YZF-R1 Series Service Manual page 468

EAS30514
TROUBLESHOOTING
If the fuel pump fails to operate.
TIP
• Before troubleshooting, remove the following part(s):
1. Front side cowling/Front panel
2. Rider seat
3. Fuel tank cover
4. Fuel tank
1. Check the fuses.
(Main, ignition, backup and fuel in-
jection system)
Refer to "CHECKING THE FUS-
ES" on page 8-41.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-42.
OK ↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-40.
OK ↓
4. Check the start/engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 8-40.
OK ↓
5. Check the relay unit (fuel pump re-
lay).
Refer to "CHECKING THE RE-
LAYS" on page 8-42.
OK ↓
6. Check the fuel pump.
Refer to "CHECKING THE FUEL
PUMP OPERATION" on page 7-3.
OK ↓
FUEL PUMP SYSTEM
NG →
Replace the fuse(s).
NG →
• Clean the battery terminals.
• Recharge or replace the battery.
NG →
Replace the main switch.
NG →
Replace the handlebar switch (right).
NG →
Replace the relay unit.
NG →
Replace the fuel pump.
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