Charging System Troubleshooting - Yamaha YZF-R25 Service Manual

EAS30497
TROUBLESHOOTING
The battery is not being charged.
TIP
• Before troubleshooting, remove the following part(s):
1. Passenger seat
2. Center cover
3. Rider seat
4. Side cover (left)
1. Check the fuse.
(Main)
Refer to "CHECKING THE FUS-
ES" on page 8-81.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-82.
OK ↓
3. Check the stator coil.
Refer to "CHECKING THE STATOR
COIL" on page 8-90.
OK ↓
4. Check the rectifier/regulator.
Refer to "CHECKING THE RECTI-
FIER/REGULATOR" on page 8-91.
OK ↓
5. Check the entire charging system
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-11.
OK ↓
The charging system circuit is OK.
NG →
Replace the fuse.
NG →
• Clean the battery terminals.
• Recharge or replace the battery.
NG →
Replace the stator coil assembly (Stator
coil/Crankshaft position sensor).
NG →
Replace the rectifier/regulator.
NG →
Properly connect or replace the wiring har-
ness.
8-13
CHARGING SYSTEM