Yamaha YZF-R1 Series Service Manual page 456

EAS30501
TROUBLESHOOTING
• Any of the following fail to light: turn signal light, brake light or an indicator light.
• The horn fails to sound.
• The speedometer fails to operate.
TIP
• Before troubleshooting, remove the following part(s):
1. Front side cowling/Front panel/Side cover
2. Passenger seat/Rider seat/Tail cover/Rear side cover
3. Fuel tank cover
4. Fuel tank
5. Air filter case
6. Throttle bodies
7. Drive sprocket cover
1. Check the fuses.
(Main, ignition, signaling system,
backup, ABS ECU and hazard light-
ing)
Refer to "CHECKING THE FUS-
ES" on page 8-41.
OK ↓
2. Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-42.
OK ↓
3. Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-40.
OK ↓
4. Check the entire signaling sys-
tem's wiring.
Refer to "CIRCUIT DIAGRAM" on
page 8-19.
OK ↓
Check the condition of each of the sig-
naling system circuits.
Refer to "Checking the signaling sys-
tem".
Checking the signaling system
The horn fails to sound.
1. Check the horn switch.
Refer to "CHECKING THE
SWITCHES" on page 8-40.
OK ↓
SIGNALING SYSTEM
NG →
Replace the fuse(s).
NG →
• Clean the battery terminals.
• Recharge or replace the battery.
NG →
Replace the main switch.
NG →
Properly connect or repair the signaling
system's wiring.
NG →
Replace the handlebar switch (left).
8-21