6-10 COOLING AND LUBRICATION SYSTEM
ECT SENSOR
REMOVAL
• Drain the engine coolant. (#2-18)
• Disconnect the ECT sensor lead wire coupler.
• Place a rag under the ECT sensor and remove the ECT sen-
sor

1.
INSPECTION
• Check the ECT sensor by testing it at the bench as shown in
the figure. Connect the ECT sensor

1 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

2 and the ohmmeter.
• If the ECT sensor ohmic valve does not change in the propor-
tion indicated, replace it with a new one.
% Temperature sensor specification
If the resistance noted to show infinity or too much different
resistance value, replace the ECT sensor with a new one.
!
Temperature Standard resistance
20 °C (68 °F) Approx. 2.45 kΩ
40 °C (104 °F) Approx. 1.148 kΩ
60 °C (140 °F) Approx. 0.587 kΩ
80 °C (176 °F) Approx. 0.322 kΩ
* Take special care when handling the ECT sensor. It
may cause damage if it gets a sharp impact.
* Do not contact the ECT sensor

1 and the column
thermometer

2 with a pan.
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