Yamaha VMX12 2001 Service Manual page 436

EAS00808
TROUBLESHOOTING
• The radiator fan motor fails to turn.
• The water temperature gauge needle
fails to move when the engine is warm.
Check:
1. main, signaling system, and radiator fan
motor fuses
2. battery
3. main switch
4. radiator fan motor
5. thermo switch
6. temperature sender
7. wiring connections (the entire cooling sys-
tem)
NOTE:
@
• Before troubleshooting, remove the following
part(s):
1) top cover
2) electrical components board
3) rider seat
4) main switch cover
• Troubleshoot with the following special
tool(s).
@
Pocket tester
90890-03112
EAS00738
1. Main, signaling system, and radiator fan
motor fuses
• Check the main, signaling system, and radi-
ator fan motor fuses for continuity.
Refer to "CHECKING THE FUSES" in
chapter 3.
• Are the main, signaling system, and radia-
tor fan motor fuses OK?
YES
NO
Replace the fuse(s).
COOLING SYSTEM
EAS00739
2. Battery
• Check the condition of the battery.
Refer to "CHECKING THE BATTERY" in
chapter 3.
Minimum open-circuit voltage
12.8 V or more at 20 °C
• Is the battery OK?
EAS00749
3. Main switch
• Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
• Is the main switch OK?
EAS00809
4. Radiator fan motor
• Disconnect the radiator fan motor coupler
from the wire harness.
• Connect the battery (12 V) as shown.
Positive battery lead → blue 1
Negative battery lead → black 2
8 - 44
ELEC
YES
• Clean the battery
terminals.
• Recharge or
replace the battery.
YES
Replace the
switch.
– +
NO
NO
main