Troubleshooting - Yamaha CS50 Service Manual

EAS00757

TROUBLESHOOTING

The starter motor fails to turn.
Check:
1. main fuse
2. battery
3. starter motor
4. starter relay
5. main switch
6. start switch
7. wiring connections
(of the entire starting system)
NOTE:
• Before troubleshooting, remove the follo-
wing part(s):
1. Front upper cowling
2. Center cover
3. Footrest board
4. Handlebar cover (upper)
• Troubleshoot with the following special
tool(s).
Pocket tester
90890-03112
EAS00738
1. Main fuse
• Check the fuse for continuity.
Refer to "CHECKING THE FUSES" in chap-
ter 3.
• Is the fuse OK?
YES
Replace the fuse.
ELECTRIC STARTING SYSTEM
NO
8-14
EAS00739
2. Battery
• Check the condition of the battery.
Refer to "CHECKING AND CHARGING THE
BATTERY" in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20°C
• Is the battery OK?
YES
EAS00758
3. Starter motor
• Connect the positive battery terminal
and starter motor lead
lead .
s WARNING
s
• A wire that is used as a jumper lead must
have at least the same capacity or more
as that of the battery lead, otherwise the
jumper lead may burn.
• This check is likely to produce sparks,
therefore make sure nothing flammable
is in the vicinity.
• Does the starter motor turn?
YES
ELEC
NO
• Recharge or
replace the
battery.
with a jumper
NO
Repair or replace
the starter motor.