Engine - Coolant Temperature Sensor/Switch: Testing and Inspection

Removal/Installation

WARNING: Removing the engine coolant temperature sensor while the engine is hot, is dangerous. Scalding coolant and steam may shoot out and cause serious injury. Turn off the engine and wait until it is cool. Even then, be very careful when removing the engine coolant temperature sensor.

1. Remove the extension manifold.




2. Disconnect engine coolant temperature sensor connector.
3. Remove the engine coolant temperature sensor.
4. Install a new gasket and install in the reverse order of removal.

Tightening torque: 20-24 Nm (15-18 ft.lb.)

Inspection
1. Place the engine coolant temperature sensor in water with a thermometer and heat the water gradually.
2. Measure the resistance of the sensor with an ohmmeter.




3. Replace the sensor if necessary.