312001680 - 1056BC ENGINE COOLANT TEMPERATURE SENSOR OPERATION CHECK
| STEP | CHECK TO BE PERFORMED | REMEDIAL ACTION IF THE CHECK IS NOT OK |
|---|---|---|
| 1 | Sensor wiring checkCheck 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 sensorReplace the engine control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R |
| 2 | Check on operation of temperature sensorDisconnect the negative battery leadRemove 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 sensorOp. 1056B50 |
| 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 |