FUEL PUMP SYSTEM
8-55
EAS27570
TROUBLESHOOTING
If the fuel pump fails to operate.
NOTE:
• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Fuel tank
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
1. Check the fuses.
(Main and ignition)
Refer to “CHECKING THE FUS-
ES” on page 8-63.
Replace the fuse(s).
2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 8-64.
• Refill battery fluid.
• Clean the battery terminals.
• Recharge or replace the battery.
3. Check the main switch.
Refer to “CHECKING THE
SWITCHES” on page 8-59.
Replace the main switch.
4. Check the engine stop switch.
Refer to “CHECKING THE
SWITCHES” on page 8-59.
The engine stop switch is faulty. Replace
the right handlebar switch.
5. Check the fuel pump operation.
Refer to “CHECKING THE FUEL
PRESSURE” on page 7-2.
Replace the fuel tank (with fuel pump).
6. Check the entire fuel pump system
wiring.
Refer to “CIRCUIT DIAGRAM” on
page 8-53.
Properly connect or repair the fuel pump
system wiring.
Replace the ECU.
YamahaR125.COM
Summary of Contents for YZF-R125
Page 1: ...5D7 F8197 E0 YAMAHAR125 COM SERVICE MANUAL YZF R125 ...
Page 6: ...YamahaR125 COM ...
Page 8: ...YamahaR125 COM ...
Page 52: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29 1 2 3 4 YamahaR125 COM ...
Page 70: ...CABLE ROUTING 2 47 YamahaR125 COM ...
Page 73: ...YamahaR125 COM ...
Page 102: ...ELECTRICAL SYSTEM 3 29 YamahaR125 COM ...
Page 105: ...YamahaR125 COM ...
Page 172: ...CHAIN DRIVE 4 67 YamahaR125 COM ...
Page 181: ...ENGINE REMOVAL 5 6 2 2 4 1 3 YamahaR125 COM ...
Page 263: ...THROTTLE BODY 7 8 YamahaR125 COM ...
Page 264: ...AIR INDUCTION SYSTEM 7 9 EAS27040 AIR INDUCTION SYSTEM 1 2 3 YamahaR125 COM ...
Page 268: ...AIR INDUCTION SYSTEM 7 13 YamahaR125 COM ...
Page 271: ...YamahaR125 COM ...
Page 283: ...CHARGING SYSTEM 8 12 1 AC magneto 3 Rectifier regulator 4 Main fuse 9 Battery YamahaR125 COM ...
Page 285: ...CHARGING SYSTEM 8 14 YamahaR125 COM ...
Page 295: ...SIGNALING SYSTEM 8 24 YamahaR125 COM ...
Page 299: ...COOLING SYSTEM 8 28 YamahaR125 COM ...
Page 323: ...FUEL INJECTION SYSTEM 8 52 YamahaR125 COM ...
Page 327: ...FUEL PUMP SYSTEM 8 56 YamahaR125 COM ...
Page 353: ...YamahaR125 COM ...
Page 354: ...YamahaR125 COM ...