Yamaha T135SE Service Manual page 335

6. Thermo sensor
9 Remove the thermo sensor from the cylinder.
9 Connect the digital circuit tester ( Ω⋅ 100) to
the thermo switch 1 as shown.
9 Immerse the thermo sensor in a container
filled with coolant 2 .
NOTE:
Make sure that the thermo sensor terminals
do not get wet.
9 Place a thermometer 3 in the coolant.
9 Slowly heat the coolant, then let it cool to the
specified temperature as indicated in the
table.
9 Check the thermo sensor for continuity at the
temperatures indicated in the table.
Thermo sensor resistance
2.32–2.59 k Ω at 20° C (68° F)
310–326 Ω at 80° C (176° F)
140–144 Ω at 110° C (230° F)
w
99
Handle the thermo sensor with special
care.
99
Never subject the thermo sensor to
strong shocks. If the thermo sensor is
dropped, replace it.
COOLING SYSTEM
9 Does the thermo sensor operate properly as
described above?
Tighten the thermo
sensor to specified
torque.
18 Nm
(1.8 m•kg, 13 ft•lb)
EAS00795
7. Wiring
9 Check the entire signaling system wiring.
Refer to "CIRCUITDIAGRAM".
9 Is the signaling system wiring properly con-
nected and without defects?
Check the condi-
tion of each of the
cooling system cir-
cuits.
Refer to "CHECK-
ING THE COOL-
ING SYSTEM".
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ELEC
3
1
2
YES NO
Replace the
thermo sensor.
YES NO
Properly connect or
repair the cooling
system wiring.