Yamaha VMX12 2001, Service Manual

Page: 409 / 454

8 - 17
– +
ELEC
ELECTRIC STARTING SYSTEM
EAS00757
TROUBLESHOOTING
Check:
1. main and ignition fuses
2. battery
3. starter motor
4. starting circuit cutoff relay
5. starter relay
6. main switch
7. engine stop switch
8. neutral switch
9. sidestand switch
10.clutch switch
11.start switch
12.diode assembly
13.wiring connections (of the entire starting
system)
NOTE:
@
• Before troubleshooting, remove the following
part(s):
1) top cover
2) electrical components board
3) left side cover
4) rider seat
5) main switch cover
• Troubleshoot with the following special
tool(s).
@
EAS00738
YES
NO
EAS00739
YES NO
EAS00758
YES NO
The starter motor fails to turn.
Pocket tester
90890-03112
1. Main and ignition fuses
• Check the main and ignition fuses for conti-
nuity. Refer to “CHECKING THE FUSES” in
chapter 3.
• Are the main and ignition fuses OK?
Replace the fuse(s).
2. Battery
• Check the condition of the battery.
Refer to “CHECKING THE BATTERY” in
chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20 °C
• Is the battery OK?
• 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.