Troubleshooting - Yamaha MT-09 2021 Service Manual

EAS30501

TROUBLESHOOTING

• Any of the following fail to light: turn signal light, brake light or an indicator light.
• The horn fails to sound.
• The fuel meter fails to come on.
• The speedometer fails to operate.
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
1. Check the fuses.
(Main, ignition 1, ignition 2, ABS
ECU signaling system, backup 1,
backup 2, and brake light.)
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 entire signaling sys-
tem's wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-29.
OK↓
Check the condition of each of the sig-
naling system circuits. Refer to
"Checking the signaling system" on
page 8-34.
NG→ Replace the fuse(s).
• Clean the battery terminals.
NG→
• Recharge or replace the battery.
NG→ Replace the main switch/immobilizer unit.
Properly connect or repair the signaling
NG→
system's wiring.
8-33
SIGNALING SYSTEM