Troubleshooting - Yamaha MT-09 2021 Service Manual

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.
OK↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-56.
OK↓
3. Check the starter motor operation.
Refer to "CHECKING THE START-
ER MOTOR OPERATION" on
page 8-60.
NG↓
4. Check the starter motor.
Refer to "CHECKING THE START-
ER MOTOR" on page 5-43.
OK↓
5. Check the relay unit (starting circuit
cut-off relay).
Refer to "CHECKING THE RE-
LAYS" on page 8-56.
OK↓
6. Check the relay unit (diode).
Refer to "CHECKING THE RELAY
UNIT (DIODE)" on page 8-58.
OK↓
7. Check the starter relay.
Refer to "CHECKING THE RE-
LAYS" on page 8-56.
OK↓
ELECTRIC STARTING SYSTEM
NG→ Replace the fuse(s).
• Clean the battery terminals.
NG→
• Recharge or replace the battery.
Starter motor is OK. Perform the electric
OK→ starting system troubleshooting, starting
with step (5).
NG→ Repair or replace the starter motor.
NG→ Replace the relay unit.
NG→ Replace the relay unit.
NG→ Replace the starter relay.
8-15