Attention! Do not disconnect the sensor until the engine has cooled down.
Examination
1. If the coolant temperature sensor is not working, check the fuses first.
2. If the temperature gauge shows an excessively high or low temperature, warm up the engine.
6.3a Coolant temperature sensor (indicated by an arrow) usually located near the thermostat, which is located at the intake manifold.
6.3b On some models, the coolant temperature sensor (indicated by an arrow) located at the bottom of the intake manifold, behind the distributor.
3. If the temperature sensor shows a high temperature when the engine has not yet warmed up, disconnect the wires from the sensor (6.3a, 6.3b). If temperature fluctuations are observed, then the sensor should be replaced. If the sensor shows a high temperature, then the wires are shorted.
4. If after warming up the engine, the temperature sensor still does not function, and the fuses have been checked, stop the engine. Disconnect the wire from the sensor and ground it to the motor housing. Turn on the ignition without starting the engine. If the sensor shows a high temperature, it should be replaced.
5. If the temperature sensor still does not work, then it is defective, or the circuit may be open.
Replacement
6. When the engine is completely cool, disconnect the radiator shroud, compress the upper radiator hose and replace the cap.
7. Disconnect the sensor from electricity.
8. Prepare a new temperature sensor.
9. Install a new sensor.
10. Gently insert the sensor and connect the wire harness.
11. Add coolant and start the engine. Check the system for leaks.