Yamaha YFM660FS, Supplementary Service Manual

Page: 439 / 478

9 - 25
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ELEC
CHARGING SYSTEM
EB804010
TROUBLESHOOTING
Procedure
Check:
1.Fuse (main)
2.Battery
3.Charging voltage
IF THE BATTERY IS NOT CHARGED:
4.Charging coil resistance
5.Wiring connections
(the entire charging system)
NOTE:
●
Remove the following part(s) before trouble-
shooting:
1)Seat
2)Fuel tank side panels
●
Use the following special tool(s) for trouble-
shooting.
Inductive tachometer:
P/N. YU-8036-A
Engine tachometer:
P/N. 90890-03113
Pocket tester:
P/N. YU-03112, 90890-03112
EB802011
CONTINUITY
1.Fuse (main)
Refer to “CHECKING THE SWITCH”.
NO CONTINUITY
Replace the fuse.
EB802012
CORRECT
2.Battery
●
Check the battery condition.
Refer to “CHECKING THE BATTERY” in
CHAPTER 3.
Open-circuit voltage:
12.8 V or more at 20 °C (68 °F)
INCORRECT
●
Clean the battery terminals.
●
Recharge or replace the battery.
EB804011
3.Charging voltage
●
Connect the engine tachometer to the
spark plug lead #1.
●
Connect the pocket tester (DC 20 V) to the
battery.
Tester (+) lead
→
Battery (+) terminal
Tester (–) lead
→
Battery (–) terminal