Troubleshooting - Yamaha YZF-R1 2000 Supplementary Service Manual

EB807010

TROUBLESHOOTING

S The radiator fan motor fails to turn.
S The coolant temperature meter needle
fails to move when the engine is warm.
CAUTION:
S If the engine is kept running at over 1,500
rpm for at least one minute with the switch
remaining placed in neutral position and
the throttle valve fully open, even when the
coolant temperature is low enough, the ra-
diator fan motor will start rotating. This,
however, is not trouble.
S Keep hands and other body regions away
to avoid injury.
Check:
1. main, signal system, and radiator fan motor
fuses
2. battery
3. main switch
4. radiator fan motor
5. Fan motor relay
6. Speedometer
7. Thermo unit
8. 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) left side cowling
5) windshield
S Troubleshooting 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
NO
Replace the fuse(-s).
COOLING SYSTEM
EB802401
2. Battery
S Check the condition of the battery.
Refer to "CHECKING AND CHARGING
THE BATTERY" in chapter 3.
Open-circuit voltage
12.8 V or more at 20_C
S Is the battery OK?
EB802411
3. Main switch
S Check the main switch for continuity.
Refer to "CHECKING THE SWITCHES".
S Is the main switch OK?
EB807400
4. Radiator fan motor
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?
–63–
ELEC
YES
S Clean the battery
terminals.
S Recharge
place the battery.
YES
Replace the
switch.
1
2
YES
The radiator fan mo-
tor is faulty and must
be replaced.
NO
or re-
NO
main
NO