Yamaha 2005 MT-01, Service Manual

Page: 336 / 435

SIGNALING SYSTEM
7-21
EAS27290
TROUBLESHOOTING
• Any of the following fail to light: turn signal light, brake light or indicator light.
• The horn fails to sound.
• The speedometer fails to operate.
NOTE:
• Before troubleshooting, remove the following part(s):
1. Seat
2. Fuel tank
3. Air filter case
4. Headlight assembly
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
NG
→
OK
↓
Checking the signaling system
The horn fails to sound.
NG
→
OK
↓
NG
→
OK
↓
1. Check the fuses.
(Main, ignition, signaling system,
parking lighting, and ECU)
Refer to “CHECKING THE FUSES”
on page 7-93.
Replace the fuse(s).
2. Check the battery.
Refer to “CHECKING AND
CHARGING THE BATTERY” on
page 7-94. • Clean the battery terminals.
• Recharge or replace the battery.
3. Check the main switch.
Refer to “CHECKING THE
SWITCHES” on page 7-89. Replace the main switch/immobilizer unit.
4. Check the entire signaling system
wiring.
Refer to “CIRCUIT DIAGRAM” on
page 7-19. Properly connect or repair the signaling
system wiring.
Check the condition of each of the
signaling system’s circuits. Refer to
“Checking the signaling system”.
1. Check the horn switch.
Refer to “CHECKING THE
SWITCHES” on page 7-89. Replace the left handlebar switch.
2. Check the horn.
Refer to “CHECKING THE HORN”
on page 7-102. Replace the horn.