Engine coolant temperature sensor 1.4 l, 55 and 74 kW
1 – junction block; 2 – coolant temperature sensor
Engine coolant temperature sensor 1.0L 37kW and 1.4L 50kW
1 – junction block; 2 – coolant temperature sensor
Engine Coolant Temperature Sensor 1.9L 74kW
1 – junction block; 2 – coolant temperature sensor
Graph of the dependence of the coolant temperature sensor resistance on the sensor temperature
1. Disconnect the wire from the battery terminal.
2. Drain the coolant (see subsection 5.13).
3. Remove the upper engine cover (see subsection 2.1).
4. Disconnect connector 1 (see the figure Engine coolant temperature sensor 1.4 l, 55 and 74 kW, the figure Engine coolant temperature sensor 1.0 l, 37 kW and 1.4 l, 50 kW and the figure Engine coolant temperature sensor 1.9 l, 74 kW) with wires from coolant temperature sensor 2.
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5. Remove the sensor and, connecting an ohmmeter to its contacts, measure the sensor resistance.
6. Heat the sensor by placing it in hot water (temperature approximately 80°C) and measure its resistance again. Compare the obtained results with the graph (see the figure Graph of the dependence of the coolant temperature sensor resistance on the sensor temperature). For example, at 30°C, the sensor resistance should be 1.5-2.0 kOhm, and at 80°C, 275-375 Ohm. If the measured resistance does not match the specified value, replace the sensor.