Yamaha XV19SX(C) Service Manual page 456

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
1. Check the fuses.
(Main, fuel injection system, ignition
and ECU)
Refer to "CHECKING THE FUS-
ES" on page 7-75.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 7-76.
OK ↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 7-71.
OK ↓
4. Check the engine stop switch.
Refer to "CHECKING THE
SWITCHES" on page 7-71.
OK ↓
5. Check the relay unit (fuel pump re-
lay).
Refer to "CHECKING THE RE-
LAYS" on page 7-79.
OK ↓
6. Check the diode 2. (for XV19S(C)/
XV19M(C)/ XV19CTS(C)/
XV19CTM(C))
Refer to "CHECKING THE DI-
ODES" on page 7-81.
OK ↓
7. Check the fuel pump.
Refer to "CHECKING THE FUEL
PUMP" on page 7-90.
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 →
The engine stop switch is faulty. Replace
the right handlebar switch.
NG →
Replace the relay unit.
NG →
Replace the diode 2.
NG →
Replace the fuel pump assembly.
7-65