Yamaha YBR125ED 2005 Service Manual page 302

EAS00821
TROUBLESHOOTING
The carburetor heating system fails to
operate.
Check:
1. fuse
2. battery
3. main switch
4. thermo switch
5. carburetor heater
6. wiring connections
(of the entire carburetor heating system)
NOTE:
_
• Before troubleshooting, remove the following
part(s):
1. headlight assembly
2. side cover (left and right)
3. seat
• Troubleshoot with the following special
tool(s).
Pocket tester
90890-03112, YU-03112-C
EAS00738
1. Fuse
• Check the fuse for continuity.
Refer to "CHECKING THE FUSE" in chap-
ter 3.
• Is the fuse OK?
YES
CARBURETOR HEATING SYSTEM
NO
Replace the fuse.
EAS00739
2. Battery
• 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)
• Is the battery OK?
EAS00749
3. Main switch
• Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the main switch OK?
7 - 43
ELEC
YES
• Refill battery fluid.
• Clean the battery
terminals.
• Recharge or
replace the battery.
YES
Replace the
switch.
– +
NO
NO
main