Yamaha YZFR1Y(C) 2009 Service Manual page 486

EAS27570
TROUBLESHOOTING
If the fuel pump fails to operate.
TIP
• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Fuel tank
3. Passenger seat
4. Left side cowling
1. Check the fuses.
(Main, ignition and fuel injection
system)
Refer to "CHECKING THE FUSES"
on page 8-109.
OK↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-109.
OK↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-105.
OK↓
4. Check the engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 8-105.
OK↓
5. Check the relay unit (fuel pump
relay).
Refer to "CHECKING THE
RELAYS" on page 8-113.
OK↓
6. Check the fuel pump.
Refer to "CHECKING THE FUEL
PRESSURE" on page 7-18.
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 right handlebar switch.
NG→
Replace the relay unit.
NG→
Replace the fuel pump.
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