Troubleshooting - Yamaha YZFR6X(C) 2008 Service Manual

EAS27570

TROUBLESHOOTING

If the fuel pump fails to operate.
NOTE:
• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Fuel tank
3. Side cowlings
1. Check the fuses.
(Main, ignition and fuel injection
system)
Refer to "CHECKING THE FUSES"
on page 8-85.
OK↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-86.
OK↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-81.
OK↓
4. Check the engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 8-81.
OK↓
5. Check the relay unit (fuel pump
relay).
Refer to "CHECKING THE
RELAYS" on page 8-89.
OK↓
6. Check the fuel pump.
Refer to "CHECKING THE FUEL
PUMP" on page 8-98.
OK↓
7. Check the entire fuel pump sys-
tem's wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-73.
OK↓
Replace the ECU.
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.
NG→
Properly connect or repair the fuel
pump system's wiring.
8-75