Yamaha YFM45FAR, Service Manual

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ELEC
SIGNAL SYSTEM
3.If the coolant temperature warning light does not come on:
●
Check that the light comes on when the main switch is set to “ON”.
●
Check that the light comes on when the coolant temperature is 120 ± 3 °C (248 ± 5.4 °F) or higher
and that the light remains on when the coolant temperature drops to 113 °C (235.4 °F).
GOOD
CONDITION
1.Thermo switch 1
●
Remove the thermo switch 1 from the
cylinder head.
●
Connect the pocket tester (
Ω ×
1) to the
thermo switch 1
1
.
●
Immerse the thermo switch 1 in coolant
2
.
●
Check the thermo switch 1 for continuity.
While heating the coolant use a thermometer
3
to record the temperatures.
Test
step
Coolant temperature
Continuity
Thermo switch 1
1
Less than 120 ± 3 °C
(248 ± 5.4 °F)
NO
2
More than 120 ± 3 °C
(248 ± 5.4 °F)
YES
3
More than 113 °C
(235.4 °F)
YES
4
Less than 113 °C
(235.4 °F)
NO
Test steps 1 & 2: Heating phase
Test steps 3 & 4: Cooling phase
È
The thermo switch 1 circuit is open and the
coolant temperature warning light is off.
É
The thermo switch 1 circuit is closed and the
coolant temperature warning light is come on.
WARNING
Handle the thermo switch 1 with special
care.
Never subject it to a strong shock or allow
it to be dropped. Should it be dropped, it
must be replaced.
T
R
.
.
Thermo switch 1:
8 Nm (0.8 m • kg, 5.8 ft • lb)
Three bond sealock
®
#10
Replace the meter assembly.
É
È
113 ˚C
(235.4 ˚F)
120 ± 3 ˚C
(248 ± 5.4 ˚F)
BAD CONDITION
Replace the thermo switch 1.