Yamaha YZF-R1S, Service Manual

Page: 429 / 457

8-36
YES NO
S
Clean the battery
terminals.
S
Recharge or re-
place the battery.
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3. Main switch
S
Check the main switch for continuity.
Refer to “CHECKING THE SWITCHES”.
S
Is the main switch OK?
YES NO
Replace the main
switch.
YES NO
1. Horn switch
S
Check the horn switch for continuity.
Refer to “CHECKING THE SWITCHES”.
S
Is the horn switch OK?
Replace the left han-
dlebar switch.
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CHECKING THE SIGNALING SYSTEM
1. The horn fails to sound.
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4. Wiring
S
Check the entire signaling system’s wiring.
Refer to “CIRCUIT DIAGRAM”.
S
Is the signaling system’s wiring properly
connected and without defects?
YES NO
Properly connect or
repair the signaling
system’s wiring. Check the condition
of each of the signal-
ing system’s circuits.
Refer to “CHECK-
ING THE LIGHTING
SYSTEM”.
SIGNALING SYSTEM
ELEC
NOTE:
YES
NO
1. Backup, main, ignition, signal and park
fuses
S
Check the backup, main, ignition, signal and
park fuses for continuity.
Refer to “CHECKING THE FUSES” in chap-
ter 3.
S
Are the backup, main, ignition, signal and
park fuses OK?
Replace the fuse(s).
2. Battery
S
Check the condition of the battery.
Refer to “CHECKING AND CHARGING
THE BATTERY” in chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20
_
C (68
_
F)
S
Is the battery OK?
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TROUBLESHOOTING
S
Any of the following fail to light: turn sig-
nal light, brake light or an indicator light.
S
The horn fails to sound.
Check:
1. backup, main, ignition, signal, and park
fuses
2. battery
3. main switch
4. wiring connections
(of the entire signaling system)
S
Before troubleshooting, remove the following
part(s):
1. seat
2. fuel tank
3. side cowlings
S
Troubleshoot with the following special tool(s).
Pocket tester
90890-03112, YU-3112
EAS00738