Yamaha XV19SX(C), Service Manual

Page: 456 / 494

FUEL PUMP SYSTEM
7-65
EAS27570
TROUBLESHOOTING
If the fuel pump fails to operate.
NOTE:
• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Tool kit tray
3. Rider seat bracket assembly
4. Left side cover
5. Headlight assembly
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
1. Check the fuses.
(Main, fuel injection system, ignition
and ECU)
Refer to “CHECKING THE FUS-
ES” on page 7-75.
Replace the fuse(s).
2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 7-76. • Clean the battery terminals.
• Recharge or replace the battery.
3. Check the main switch.
Refer to “CHECKING THE
SWITCHES” on page 7-71. Replace the main switch.
4. Check the engine stop switch.
Refer to “CHECKING THE
SWITCHES” on page 7-71.
The engine stop switch is faulty. Replace
the right handlebar switch.
5. Check the relay unit (fuel pump re-
lay).
Refer to “CHECKING THE RE-
LAYS” on page 7-79.
Replace the relay unit.
6. Check the diode 2. (for XV19S(C)/
XV19M(C)/ XV19CTS(C)/
XV19CTM(C))
Refer to “CHECKING THE DI-
ODES” on page 7-81.
Replace the diode 2.
7. Check the fuel pump.
Refer to “CHECKING THE FUEL
PUMP” on page 7-90. Replace the fuel pump assembly.