Troubleshooting - Yamaha YZF-R125 Service Manual

YamahaR125.COM
EAS27190

TROUBLESHOOTING

The starter motor fails to turn.
NOTE:
• Before troubleshooting, remove the following part(s):
1. Seats
2. Fuel tank
3. Left lower side cowling
4. Left upper side cowling
1. Check the fuses.
(Main and ignition)
Refer to "CHECKING THE FUS-
ES" on page 8-63.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-64.
OK ↓
3. Check the starter motor operation.
Refer to "CHECKING THE START-
ER MOTOR OPERATION" on page
8-70.
NG ↓
4. Check the starter motor.
Refer to "CHECKING THE START-
ER MOTOR" on page 5-36.
OK ↓
5. Check the starting circuit cut-off re-
lay.
Refer to "CHECKING THE RE-
LAYS" on page 8-66.
OK ↓
6. Check the diode.
Refer to "CHECKING THE DIODE"
on page 8-67.
OK ↓
7. Check the starter relay.
Refer to "CHECKING THE RE-
LAYS" on page 8-66.
OK ↓
ELECTRIC STARTING SYSTEM
NG →
Replace the fuse(s).
NG →
• Refill battery fluid.
• Clean the battery terminals.
• Recharge or replace the battery.
OK →
Starter motor is OK. Perform the electric
starting system troubleshooting, starting
with step 5.
NG →
Repair or replace the starter motor.
NG →
Replace the starting circuit cut-off relay.
NG →
Replace the diode.
NG →
Replace the starter relay.
8-9