The Carburetor Heating System Fails To Operate; Troubleshooting - Yamaha Royal Star Tour Deluxe XVZ13CTTC Supplementary Service Manual

EAS00821

TROUBLESHOOTING

The carburetor heating system fails to
operate.
Check:
1. main and carburetor heater fuses
2. battery
3. main switch
4. neutral switch
5. carburetor heater relay
6. thermo switch 2
7. carburetor heater
8. wiring connections
(of the entire carburetor heating system)
NOTE:
_
• Before troubleshooting, remove the following
part(s):
1. Rider and passenger seats
2. Fuel tank
• Troubleshoot with the following special
tool(s).
Pocket tester
YU-03112-C, 90890-03112
EAS00738
1. Main and carburetor heater fuses
• Check the main and carburetor heater
fuses for continuity.
Refer to "CHECKING THE FUSES" in
CHAPTER 3. (Manual No.: 4XY-28197-E0)
• Are the main and carburetor heater fuses
OK?
YES
CARBURETOR HEATING SYSTEM
NO
Replace the fuse(s).
– 62 –
EAS00739
2. Battery
• Check the condition of the battery.
Refer to "CHECKING AND CHARGING
THE BATTERY" in CHAPTER 3. (Manual
No.: 4XY-28197-E0)
Open-circuit voltage
12.8 V or more at 20 °C (68 °F)
• Is the battery OK?
YES
EAS00749
3. Main switch
• Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the main switch OK?
YES
EAS00751
4. Neutral switch
• Check the neutral switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the neutral switch OK?
YES
– +
ELEC
NO
• Clean the battery
terminals.
• Recharge or
replace the battery.
NO
Replace the main
switch.
NO
Replace the neutral
switch.