8 - 50
–+
ELEC
COOLING SYSTEM
EAS00811
YES
NO
7. Coolant temperature sensor
• Remove the coolant temperature sensor
from the thermostat assembly inlet pipe.
• Connect the pocket tester (
Ω
×
1) to the
coolant temperature sensor
1
as shown.
• Immerse the coolant temperature sensor in
a container filled with coolant
2
.
NOTE:
Make sure that the coolant temperature sen-
sor terminals do not get wet.
• Place a thermometer
3
in the coolant.
• Slowly heat the coolant, then let it cool
down to the specified temperature.
• Check the coolant temperature sensor for
continuity at the temperatures indicated
below.
Test step
Coolant temperature
Continu-
ity
Coolant temperature
sensor
1 Less than 105 °C NO
2 More than 105 °C YES
3 More than 100 °C YES
4 Less than 100 °C NO
Test steps 1 & 2: Heating phase
Test steps 3 & 4: Cooling phase
WARNING
@
• 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.
T
R
.
.
Coolant temperature sensor
20 Nm (2.0 m · kg)
Three bond sealock
®
10
È
The coolant temperature sensor circuit is open
and the radiator fan is off.
É
The coolant temperature sensor circuit is
closed and the radiator fan is on.
• Does the
coolant temperature sensor
operate
properly as described above?
Replace the
coolant
temperature sensor
.
100 °C 105 °C
