Yamaha 5YF2-AE1, Service Manual

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ELEC
CHARGING SYSTEM
EBS01066
NO
YES
EBS01100
YES NO
EBS01059
YES
NO
3. Charging voltage
• Connect the engine tachometer to the
spark plug lead.
• Connect the pocket tester (DC 20 V) to the
battery as shown.
Positive tester probe
→
positive battery terminal
Negative tester probe
→
negative battery terminal
• Start the engine and let it run at approxi-
mately 5,000 r/min.
• Measure the charging voltage.
Charging voltage
14 V at 5,000 r/min
NOTE:
_
Make sure the battery is fully charged.
• Is the charging voltage within specifica-
tion?
The charging circuit
is OK.
4. Charging coil resistance
• Disconnect the C.D.I. magneto coupler
from the wire harness.
• Connect the pocket tester (
Ω ×
1) to the
charging coils.
Positive tester probe
→
white terminal
1
Negative tester probe
→
black terminal
2
• Measure the charging coil resistance.
Charging coil resistance
0.72 ~ 1.08
Ω
at 20 °C (68 °F)
(between white and black)
Replace the rectifier/
regulator. Replace the pickup
coil/stator assembly.
5. Wiring
• Check the entire charging system’s wiring.
Refer to “CIRCUIT DIAGRAM”.
• Is the charging system’s wiring properly
connected and without defects?
The charging system
circuit is OK. Properly connect or
repair the charging
system’s wiring.
W
Y / R B
Sb
2
1