Troubleshooting - Yamaha YFM7FGPW Service Manual

EBS01048

TROUBLESHOOTING

The starter motor fails to turn.
Check:
1. main, ignition and signaling system fuses
2. battery
3. starter motor
4. starting circuit cut-off relay
5. starter relay
6. Rear brake relay
7. Diode 2
8. main switch
9. engine stop switch
10.start switch
11.rear brake light switch
12.gear position switch
13.wiring connections
(of the entire starting system)
NOTE:
_
• Before troubleshooting, remove the following
part(s):
1. seat
2. battery cover
3. side covers
• Troubleshoot with the following special
tool(s).
Pocket tester
90890-03112
Analog pocket tester
YU-03112-C
EBS01043
1. Main, ignition and signaling system fuses
• Check the main, ignition and signaling sys-
tem fuses for continuity.
Refer to "CHECKING THE FUSES" in
chapter 3.
• Are the main, ignition and signaling sys-
tem fuses OK?
YES
ELECTRIC STARTING SYSTEM
NO
Replace the fuse(s).
9 - 18
EBS01044
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 (68 °F)
• Is the battery OK?
YES
EBS01051
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?
YES
– +
ELEC
NO
• Clean the battery
terminals.
• Recharge or
replace the battery.
NO
Repair or replace the
starter motor.