Troubleshooting - Yamaha MT-09 2021 Service Manual

EAS30499

TROUBLESHOOTING

Any of the following fail to light: headlight, auxiliary light, high beam indicator light, taillight, license light
or meter light.
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. Headlight assembly
1. Check the fuses.
(Main, headlight, ignition 1, ignition
2, backup 1, backup 2, and signal-
ing system)
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 main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-53.
OK↓
4. Check the dimmer switch.
Refer to "CHECKING THE
SWITCHES" on page 8-53.
OK↓
5. Check the pass switch.
Refer to "CHECKING THE
SWITCHES" on page 8-53.
OK↓
6. Check the entire lighting system's
wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-23.
OK↓
NG→ Replace the fuse(s).
• Clean the battery terminals.
NG→
• Recharge or replace the battery.
NG→ Replace the main switch/immobilizer unit.
The dimmer switch is faulty. Replace the
NG→
handlebar switch (left).
The pass switch is faulty. Replace the
NG→
handlebar switch (left).
Properly connect or repair the lighting sys-
NG→
tem's wiring.
8-27
LIGHTING SYSTEM