Yamaha YZFR1W 2007 Service Manual page 340

EAS27290
TROUBLESHOOTING
• Any of the following fail to light: turn signal light, brake light or an indicator light.
• The horn fails to sound.
NOTE:
• Before troubleshooting, remove the following part(s):
1 Rider seat
2 Passenger seat
3 Fuel tank
4 Side cowling
1 Check the fuses.
(Main, fuel injection system, head-
light, Turn signal light, signal)
Refer to "CHECKING THE FUSES"
on page 8-85.
OK↓
2 Check the battery.
Refer to "CHECKING AND
CHARGING THE BATTERY" on
page 8-85.
OK↓
3 Check the main switch.
Refer to "CHECKING THE
SWITCHES" on page 8-81.
OK↓
4 Check the entire signaling system's
wiring.
Refer to "SIGNALING SYSTEM" on
page 8-19.
OK↓
This circuit is OK.
Check the signaling system
The horn fails to sound.
1 Check the horn switch.
Refer to "CHECKING THE
SWITCHES" on page 8-81.
OK↓
2 Check the horn.
Refer to "CHECKING THE HORN"
on page 8-94.
OK↓
SIGNALING SYSTEM
NG→
Replace the fuse(s).
NG→
• Clean the battery terminals.
• Recharge or replace the battery.
NG→
Replace the main switch/immobilizer
unit assembly.
NG→
Properly connect or repair the signal-
ing system's wiring.
NG→
Replace the left handlebar switch.
NG→
Replace the horn.
8-21