Yamaha YFM400FAR Service Manual page 353

*
6.Thermo switch (radiator)
Remove the thermo switch (radiator) from
G
the radiator.
Connect the pocket tester (Ω × 10) to the
G
thermo switch (radiator) 1.
Immerse the thermo switch (radiator) in
G
coolant 2.
Check the thermo switch (radiator) for
G
continuity.
While heating the
3
thermometer
temperatures.
Coolant temperature
Test
Thermo switch
step
(radiator)
Less than 86 ± 3 °C
1
(186.8 ± 5.4 °F)
More than 86 ± 3 °C
2
(186.8 ± 5.4 °F)
More than 80 ± 3 °C
3
(176 ± 5.4 °F)
Less than 80 ± 3 °C
4
(176 ± 5.4 °F)
Test steps 1 & 2: Heating phase
Test steps 3 & 4: Cooling phase
È The thermo switch (radiator) circuit is open
and the radiator fan is off.
É The thermo switch (radiator) circuit is closed
and the radiator fan is on.
WARNING
Handle the thermo switch (radiator) with
special care.
Never subject it to a strong shock or
allow it to be dropped. Should it be
dropped, it must be replaced.
Thermo switch (radiator):
28 Nm (2.8 m • kg, 20 ft • lb)
Three bond sealock
*
C0NTINUITY
coolant use a
to record the
Continuity
NO
YES
YES
NO
®
#10
GOOD
CONDITION
9 - 46
COOLING SYSTEM
80 ± 3 ˚C
(176 ± 5.4 ˚F)
BAD CONDITION
Replace the thermo switch (radiator).
– +
ELEC
É
È
86 ± 3 ˚C
(186.8 ± 5.4 ˚F)