4.3 Parameters of technical features
(1) Data limit
Item Value Unit
Rated voltage Can only be run by ECU
Rated resistance at 20℃
2.5±5% kΩ
Range of running temperature -30 to +130 ℃
Max. measuring current passing the
sensor
1 mA
Permissible vibration acceleration 600 m/s
2
4.4 Installation attentions
Coolant temperature sensor is installed on the cylinder body and the copper heat conducted
socket is inserted into coolant. There are thread on the socket, and screw in coolant temperature
sensor onto the threaded hole on cylinder block by the hexagon head of the socket. The maximum
permissible tightening torque is 15Nm.
4.5 Failure effects and judgment method
l Failure effects: starting difficulties etc.
l General cause of the failure: man induced failure.
l Simple measurement method:
With the joint removed, turn the digital multimeter to Ohm shift, and then connect the two
meter pens respectively to 1# and 2# pins of the sensor; At 20, the rated resistance should be ℃
2.5kΩ±5% and the others can be measured out from the characteristic curve in above chart.
Analogue method can also be used when measuring, i.e., dip the working area of the sensor in boiled
water (dip for adequate time), observe the resistance change of the sensor, at this point, the resistance
should fall to 300Ω-400Ω(the actual value depends on the temperature of the boiled water).
C
sensor
