Engine Coolant Temperature (ECT) Sensor: Inspection

Remove the 2 union bolt, 4 gaskets and fuel pipe.

Fig 1: Removing Union Bolt, Gaskets & Fuel Pipe

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1. Disconnect the ECT sensor connector.
2. Using a 19 mm deep socket wrench, remove the ECT sensor and gasket.

Fig 2: Removing ECT Sensor & Gasket

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an ohmmeter, measure the resistance between the terminals.

Resistance: Refer to the graph 

Fig 3: Measuring Resistance Between ECT Sensor Terminals & Graph

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If the resistance is not as specified, replace the ECT sensor.

1. Install a new gasket to the ECT sensor.
2. Using a 19 mm deep socket, install the ECT sensor.

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

3. Connect the ECT sensor connector.

Install the fuel pipe with 4 new gaskets and the 2 union bolts.

Torque: 34.3 N.m (350 kgf.cm, 25 ft.lbf)