Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
INSPECTION OF ENGINE COOLANT TEMPERATURE (ECT) SENSOR1. DRAIN ENGINE COOLANT.
2. REMOVE ECT SENSOR.
(a) Disconnect the ECT sensor connector.
(b) Using special service tool (SST 09205-76030), remove the ECT sensor and gasket.
3. INSPECT ECT SENSOR.
Using an ohmmeter, measure the resistance between the terminals.
Resistance Temperature
-20° C (-4° F) 10.0 - 20.0 K ohms
0° C (32° F) 4.0 - 7.0 K ohms
20° C (68° F) 2.0 - 3.0 K ohms
40° C (104° F) 0.9 - 1.3 K ohms
60° C (140° F) 0.4 - 0.7 K ohms
80° C (176° F) 0.2 - 0.4 K ohms
^ If the resistance is not as specified, replace the ECT sensor.
4. REINSTALL ECT SENSOR.
(a) Install a new gasket to the ECT sensor.
(b) Using special service tool (SST 09205-76030), install the ECT sensor.
(c) Connect the ECT sensor connector.
5. REFILL WITH ENGINE COOLANT.