Yamaha R15 2022 Service Manual page 433

EAS30514
TROUBLESHOOTING
TIP
• Before troubleshooting, remove the following part(s):
1. Passenger seat and rider seat
2. Side cover (left and right)
3. Fuel tank cover (left and right) and fuel tank top cover
4. Fuel tank
If the fuel pump fails to operate.
1. Check the fuses.
(Main fuse)
Refer to "CHECKING THE FUSES"
on page 8-142.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-143.
OK ↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-139.
OK ↓
4. Check the engine stop / start
switch.
Refer to "CHECKING THE
SWITCHES" on page 8-139.
OK ↓
5. Check the fuel pump operation.
Refer to "CHECKING THE FUEL
PRESSURE" on page 7-5.
OK ↓
6. Check the entire fuel pump system
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-99.
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 →
The engine stop / start switch is faulty.
Replace the right handlebar switch.
NG →
Replace the fuel pump assembly.
NG →
Properly connect or replace the wire har-
ness.
8-100
ELEC – +