Engine Coolant Temperature (ECT) Sensor: Inspection

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an ohmmeter, measure the resistance between the terminals.

Resistance: Refer to  Fig 2 

Fig 2: Measuring Resistance Between Terminals Using Ohmmeter & Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Torque: 20 N.m (200 kgf.cm, 15 ft.lbf) 

3. Connect the sensor connector.