Water Temperature - HYOSUNG 2010 ST7 Service Manual

WATER TEMPERATURE

SENSOR
REMOVAL
Drain engine coolant. (Refer to page 2-25)
Remove the front seat. (Refer to page 8-1)
Remove the fuel tank. (Refer to page 5-2)
Remove the throttle body. (Refer to page 5-7)
Disconnect the WT (Water Temperature) sensor lead
wire coupler ①.
Place a rag under the sensor and remove the WT
sensor ②.
INSPECTION
Check the engine coolant temperature by testing it at
the bench as shown in the figure. Connect the WT
sensor ② to a circuit tester and place it in the
WATER contained in a pan, which is placed on a
stove.
Heat the water to raise its temperature slowly and
read the column thermometer ③ and the ohmmeter.
WT sensor resistance
Engine Coolant Temp.
-40 ℃ (-40 ℉ )
0 ℃ (32 ℉ )
20 ℃ (68 ℉ )
40 ℃ (104 ℉ )
60 ℃ (140 ℉ )
80 ℃ (176 ℉ )
120 ℃ (248 ℉ )
Multi circuit tester set : 09900-25008
If the resistance noted to show infinity or too much dif-
ferent resistance value, replace the WT sensor with a
new one.
INSTALLATION
Install the WT sensor in the reverse order of removal.
Pay attention to the following points :
Install a new O-ring ④ and apply engine coolant to
the O-ring.
Tighten the WT sensor to the specified torque.
WT sensor : 5 ~ 8 N m (0.5 ~ 0.8 kgf m)
Pour engine coolant. (Refer to page 2-25)
Bleed air from the cooling circuit. (Refer to page 2-26)
Resistance (To ECU)
㏀
Approx. 48.140
㏀
Approx. 5.790
㏀
Approx. 2.450
㏀
Approx. 1.148
㏀
Approx. 0.586
㏀
Approx. 0.322
㏀
Approx. 0.1163
③
②
CAUTION
Take special care when handling the WT sen-
sor. It may cause damage if it gets a sharp
impact.
Do not contact the WT sensor
umn thermometer with a pan.
COOLING SYSTEM 6-8
②
①
and the col-
④