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Home >> Lexus >> 1999 >> ES 300 V6-3.0L (1MZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Coolant Temperature Sensor/Switch (For Computer) >> Testing and Inspection
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Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection

1. DRAIN ENGINE COOLANT

2. REMOVE ECT SENSOR
a. Disconnect the ECT sensor connector.





b. Using a 19 mm deep socket wrench, remove the ECT sensor and gasket.

3. INSPECT ECT SENSOR





Using an ohmmeter, measure the resistance between the terminals.

Resistance: Refer to the graph

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 a 19 mm deep socket, install the ECT sensor.

Torque: 20 N.m (200 kgf.cm, 14 ft.lbf)

c. Connect the ECT sensor connector.

5. REFILL WITH ENGINE COOLANT