| CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
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| 1 | At service temperature, with engine idling, the reading must be between 10 and 120°C. The test may be said to be concluded | Move on to Step 2 |
| 2 | Press the START/STOP button and turn off the engine.Disconnect the wiring harness connector from the temperature sensor and fuel heater coilSee K100 MIL WARNING LIGHT NOT WORKING (REMAINS OFF BEFORE STARTING)Press the START/STOP button.Measure the voltage between the sensor Pin 4 and Earth. Ensure is between 4.8 and 5.2 V. Go on to Step 4See K100 MIL WARNING LIGHT NOT WORKING (REMAINS OFF BEFORE STARTING) | Move on to Step 3 |
| 3 | If faults are present, repair or if necessary replace the electrical wiring between the engine control unit and the heater coil See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered over | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |
| 4 | Measure the voltage between Pins 3 and 4 of the sensor. Check it is between 4.8 and 5.2 VSee K100 MIL WARNING LIGHT NOT WORKING (REMAINS OFF BEFORE STARTING) | Move on to Step 3 |
| 5 | Replace the diesel heater coil and ensure the fault has disappearedOp. 1044D10 FUEL HEATER - R + R | Repair the original heater coil and replace the engine management control unit. Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |