Intake air temperature sensor 1.4L 55kW and 74kW
1 - connecting block; 2 - air temperature sensor
Engine Intake Air Temperature Sensor 1.0L 37kW and 1.4L 50kW
1 - connecting block; 2 - air temperature sensor
1.9L Engine Intake Air Temperature Sensor 74kW
1 - connecting block; 2 - air temperature sensor
Graph of the dependence of the resistance of the temperature sensor of the air entering the engine on the temperature of the sensor
The temperature sensor for the air entering the gasoline engine is integrated in one housing with the air pressure sensor in the engine intake pipe. Both sensors are a non-separable design and are replaced together.
1. Disconnect the wire from the battery terminal.
2. For gasoline engines, remove the upper engine cover (see subsection 2.1).
3. For vehicles with diesel engines, remove the right headlight (see subsection 10.8).
4. Disconnect block 1 (see fig. 1.4 l engine air temperature sensor, 55 and 74 kW, fig. Intake air temperature sensor 1.0L, 37kW and 1.4L, 50kW and fig. 1.9L Engine Intake Air Temperature Sensor 74kW) with wires from air temperature sensor 2.
5. Remove the temperature sensor and, by connecting an ohmmeter to contacts 1 and 2 of the sensor, measure the resistance of the sensor.
6. Heat the sensor up to about 80°C, for example with hot air, and measure its resistance again.
7. Compare the results obtained for gasoline engines with the graph in fig. Graph of the dependence of the resistance of the temperature sensor of the air entering the engine on the temperature of the sensor, for diesel engines - in fig. Graph of coolant temperature sensor resistance versus sensor temperature. For example, for gasoline engines, the resistance of the sensor at a temperature of 20°C is 2.3-2.6 kOhm, and at a temperature of 80°C - 290-330 Ohm. For diesel engines, the resistance of the sensor at a temperature of 30°C is 1.5-2.0 kOhm, and at a temperature of 80°C - 275-375 Ohm. If the measured resistance is not as specified, replace the sensor.