Engine coolant temperature sensor operation check
- Make
- Fiat
- Model
- 500 Factory Service Manual
- Year
- 2007–2024
- Section
- Petrol injection system › Engine coolant temperature sensor operation check
EngineEngine coolant temperature sensor operation check
ENGINE COOLANT TEMPERATURE SENSOR OPERATION CHECK
| STEP | CHECK TO BE PERFORMED | REMEDIAL ACTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Sensor wiring check Check the continuity of the wiring between the sensor and the engine control unit See E5030 PETROL ENGINES ELECTRONIC MANAGEMENT Move on to Step 2 | Restore the wiring between the engine control unit and the sensor Replace the engine control unit |
| 2 | Check on operation of temperature sensor Disconnect the negative battery lead Remove the sensor and submerge the sensitive part in water. Heat the water gradually and measure the resistance between the terminals. Check that the sensor specifications correspond to the ones below. | Replace the water temperature sensor Op. 1056B50 |
1. Temperature sensor
| Temperature (°C) | Resistance (Ohm) |
|---|---|
| -20 | 15971 |
| -10 | 9620 |
| 0 | 5975 |
| 10 | 3816 |
| 20 | 2502 |
| 25 | 2044 |
| 30 | 1679 |
| 40 | 1152 |
| 50 | 807 |
| 60 | 576 |
| 70 | 418 |
| 80 | 309 |
| 90 | 231 |
| 100 | 176 |
Parts & tools for this job For 2007 Fiat 500
- TOOLOBD2 scannerSearch: OBD2 scanner
- TOOLDigital multimeterSearch: automotive digital multimeter
- TOOLBack-probe test leadsSearch: back probe test leads
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