Fuel Pump System Troubleshooting - Yamaha R1 Series 2015 Service Manual

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 FUSES"
on page 8-180.
OK
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-181.
OK
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-177.
OK
4. Check the start/engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 8-177.
OK
5. Check the relay unit (fuel pump re-
lay).
Refer to "CHECKING THE RE-
LAYS" on page 8-184.
OK
6. Check the fuel pump.
Refer to "CHECKING THE FUEL
PUMP OPERATION" on page 7-2.
OK
7. Check the entire fuel pump sys-
tem's wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-103.
OK
Replace the ECU.
Refer to "REPLACING THE ECU (En-
gine Control Unit)" on page 8-180.
Replace the fuse(s).
NG
• Clean the battery terminals.
• Recharge or replace the battery.
NG
Replace the main switch/immobilizer unit.
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.
NG
8-107
FUEL PUMP SYSTEM