Yamaha XF50W Service Manual page 326

EAS00812
4. Coolant temperature sensor
Remove the coolant temperature sensor
from the cylinder head.
Connect the pocket tester (
coolant temperature sensor1 as shown.
Immerse the coolant temperature sensor in
a container filled with coolant2.
NOTE:
Make sure the coolant temperature sensor ter-
minals do not get wet.
• Place a thermometer®
• Slowly heat the coolant, and then let it cool
to the specified temperature indicated in the
table.
• Check the thermo switch for continuity at the
temperatures indicated below.
Bj
Coolant temperature sensor resis-
tance
20°C (68°F): 2.32 ~2.59k
80°C (176°F): 0.310 ~0.326k
r?ViW:WLVel
• Handle the coolant temperature sensor
with special care.
• Never subject the coolant temperature
sensor to strong shocks. If the coolant
temperature sensor is dropped, replace
it.
COOLING SYSTEM
× 1k ) to the
in the coolant.
8-44
Coolant temperature sensor
22 Nm (2.2 m
• Does the coolant temperature sensor oper-
ate properly?
YES
V
Replace the coolant
temperature sensor.
EAS00813
5. Wiring
• Check the entire cooling system's wiring.
Refer to "CIRCUIT DIAGRAM".
• Is the cooling system's wiring properly con-
nected and without defects?
YES
V
Properly connect or re-
Replace the ECU.
pair the cooling system's
wiring.
+1 I
ELEC
• kg, 15.9 ft • lb)
NO
NO
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