Yamaha 5YF2-AE1, Service Manual, Page: 237 / 262

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ELEC
ELECTRIC STARTING SYSTEM
EBS01050
TROUBLESHOOTING
Check:
1. main fuse
2. battery
3. starter motor
4. starting circuit cut-off relay
5. starter relay
6. main switch
7. neutral switch
8. rear brake switch
9. start switch
10.diode
11.wiring connections
(of the entire starting system)
NOTE:
_
• Before troubleshooting, remove the following
part(s):
1. seat
2. front fender
3. rear fender
4. C.D.I. magneto cover
• Troubleshoot with the following special
tool(s).
EBS01043
YES
NO
EBS01044
YES NO
EBS01051
YES
NO
The starter motor fails to turn.
Pocket tester
P/N. YU-03112-C, 90890-03112
1. Main fuse
• Check the main fuse for continuity.
Refer to “CHECKING THE FUSE” in chap-
ter 3.
• Is the main fuse OK?
Replace the fuse.
2. Battery
• Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
Specific gravity
1.280 at 20 °C (68 °F)
• Is the battery OK?
• Refill battery fluid.
• Clean the battery
terminals.
• Recharge or
replace the battery.
3. Starter motor
• Connect the positive battery terminal
1
and starter motor lead
2
with a jumper
lead
3
.
WARNING
_
• A wire that is used as a jumper lead
must have at least the same capacity or
more as that of the battery lead, other-
wise 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?
Repair or replace the
starter motor.