Troubleshooting - Yamaha 2004 YXR660 Service Manual

TROUBLESHOOTING

IF THE CARBURETOR HEATING SYSTEM FAILS TO OPERATE:
Procedure
Check:
1. Fuses (main, carburetor heater)
2. Battery
3. Main switch
4. Thermo switch 2
NOTE:
• Remove the following part(s) before trouble-
shooting.
1) Console
• Use the following special tool(s) for trouble-
shooting.
1. Fuses (main, carburetor heater)
Refer to "CHECKING THE SWITCH".
2. Battery
• Check the battery condition.
Refer to "CHECKING AND CHARGING
THE BATTERY" in chapter 3.
Open-circuit voltage
12.8 V or more at 20 °C (68 °F)
3. Main switch
Refer to "CHECKING THE SWITCH".
*
CARBURETOR HEATING SYSTEM
CORRECT
CORRECT
CORRECT
9 - 57
5. Carburetor heater
6. Wiring connection
(the entire carburetor warming system)
Pocket tester
P/N. YU-03112-C, 90890-03112
NO CONTINUITY
Replace the fuse(s).
INCORRECT
• Clean the battery terminals.
• Recharge or replace the battery.
INCORRECT
Replace the main switch.
– +
ELEC