Troubleshooting - Yamaha YZF-R6 Service Manual

EB807010

TROUBLESHOOTING

S The radiator fan motor fails to turn.
S The coolant temperature display and/or
warning light fails to indicate when the
engine is warm.
Check:
1. main, signal system, and radiator fan motor
fuses
2. battery
3. main switch
4. radiator fan motor
5. thermo switch
6. thermo unit
7. wiring
(the entire cooling system)
NOTE:
S Before troubleshooting, remove the following
part(-s):
1) rider seat
2) bottom cowling
3) front cowling inner panels
4) side cowling inner panels
5) side cowlings
6) windshield
S Troubleshoot with the following special tool
(-s).
Pocket tester
90890-03112
EB802400
1. Main, signal system and radiator fan
motor fuses
S Check the main, signal system, and radiator
fan motor fuses for continuity.
Refer to "CHECKING THE FUSES" in chap-
ter 3.
S Are the main, signal system, and radiator fan
motor fuses OK?
YES
EB802401
2. Battery
S Check the condition of the battery.
Refer to "CHECKING AND CHARGING
THE BATTERY" in chapter 3.
NO
Replace the fuse(-s).
COOLING SYSTEM
Open-circuit voltage
12.8 V or more at 20_C
S Is the battery OK?
YES
EB802411
3. Main switch
S Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the main switch OK?
YES
EB807400
4. Radiator fan motor (test 1)
S Disconnect the radiator fan motor coupler
from the wire harness.
S Connect the battery (12 V) as shown.
Battery positive lead ! blue
Battery negative lead ! black
S Does the radiator fan motor turn?
YES
8-46
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.