Troubleshooting - Yamaha XF50W Service Manual

EAS00774

TROUBLESHOOTING

The battery is not being charged.
Check:
1 . main fuse
2. battery
3. charging voltage
4. stator coil resistance
5. wiring connections
(of the entire charging system)
NOTE:
8 Before troubleshooting, remove the follow-
ing part(s):
1. battery cover/front cover
2. side cover(right)
3. front fork upper cover
4. front fork cover(left and right)
5. leg shield1
8 Troubleshoot with the following special
tool(s).
Digital tachometer
90890-06760
Pocket tester
90890-03112
YU-03112-C
EAS00738
1. Main fuse
• Check the fuse for continuity.
Refer to "CHECKING THE FUSE" in chap-
ter 3.
• Is the fuse OK?
YES
V
NO
*
Replace the fuse.
CHARGING SYSTEM
EAS00739
2. Battery
• Check the condition of the battery.
Refer to "CHECKING AND CHARGING
THE BATTERY" in chapter 3.
a
Minimum open-circuit voltage
12.8 V or more at 20°C (68°F)
• Is the battery OK?
YES
V
EAS00775
3. Charging voltage
• Connect the digital tachometer to the spark
plug lead of cylinder.
• Connect the pocket tester (DC 20 V) to the
battery as shown.
Positive tester probe
terminal
Negative tester probe
terminal
• Start the engine and let it run at approxi-
mately 5,000 r/min.
• Measure the charging voltage.
a
Charging voltage
14 V at 5000r/min
8-25
ELEC
I
NO
• Clean the battery ter-
minals.
• Recharge or replace
the battery.
positive battery
negative battery
+i