Troubleshooting - Yamaha FZS1000N Service Manual

EAS00808

TROUBLESHOOTING

S The radiator fan motor fails to turn.
S The water temperature gauge needle
fails to move when the engine is warm.
Check:
1. Main and radiator fan motor fuses
2. Battery
3. Main switch
4. Radiator fan motor
5. Thermo unit
6. Wiring connections
(the entire cooling system)
NOTE:
S Before troubleshooting, remove the following
part(-s).
1) Seat
2) Fuel tank
S Troubleshoot with the following special tool(s).
Pocket tester measurement
YU-03112-C
EAS00738
1. Main and radiator fan motor fuses
S Check the main and radiator fan motor fuses
for continuity.
Refert to "CHECKING THE FUSES" in
CHAPTER 3.
S Are the main and radiator fan motor fuses
OK?
YES
EAS00739
2. Battery
S 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
NO
Replace the fuse (s).
8-44
COOLING SYSTEM
S Is the battery OK?
YES
EAS00749
3. Main switch
S Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the main switch OK?
YES
EAS00809
4. Radiator fan motor
S Disconnect the rediator fan motor coupler
from the wire harness.
S Connect the battery (12 V) as shown.
Positive battery lead ! blue
Negative battery lead ! black
S Does the rediator fan motor turn?
YES
ELEC
NO
S Clean the battery
terminals.
S Recharge
or re-
place the battery.
NO
Replace the main
switch.
1
2
NO
The radiator fan mo-
tor is faulty and must
be replaced.