Yamaha MT-09 2021 - Troubleshooting

8-15
ELECTRIC STARTING SYSTEM
EAS30495
TROUBLESHOOTING
The starter motor fails to turn.
TIP
• Before troubleshooting, remove the following part(s):
1. Rider seat
2. Fuel tank side cover
3. Fuel tank center cover
4. Fuel tank
5. Air filter case
6. Canister
1. Check the fuses.
(Main, backup 2, ignition 1, and ig-
nition 2)
Refer to “CHECKING THE FUS-
ES” on page 8-55.
NG→ Replace the fuse(s).
OK↓
2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 8-56.
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
OK↓
3. Check the starter motor operation.
Refer to “CHECKING THE START-
ER MOTOR OPERATION” on
page 8-60.
OK→
Starter motor is OK. Perform the electric
starting system troubleshooting, starting
with step (5).
NG↓
4. Check the starter motor.
Refer to “CHECKING THE START-
ER MOTOR” on page 5-43.
NG→ Repair or replace the starter motor.
OK↓
5. Check the relay unit (starting circuit
cut-off relay).
Refer to “CHECKING THE RE-
LAYS” on page 8-56.
NG→ Replace the relay unit.
OK↓
6. Check the relay unit (diode).
Refer to “CHECKING THE RELAY
UNIT (DIODE)” on page 8-58.
NG→ Replace the relay unit.
OK↓
7. Check the starter relay.
Refer to “CHECKING THE RE-
LAYS” on page 8-56.
NG→ Replace the starter relay.
OK↓