| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
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| 1 | Press the START/STOP button and turn off the engine.Clean the diesel filter and replace if necessary Op. 1044B10 FUEL FILTER ASSEMBLY - R + R OR REPLACE Press the START/STOP button. Select the following system on the diagnostic instrument: Electronic diesel injection system EDC16C39. Check that error P2264 – Water in diesel filter is “Present” | Water present in diesel filterCheck there is no water in the fuel tank.Clean the tank if necessary |
| 2 | Press the START/STOP button.Disconnect the wiring harness connector from the temperature sensor and fuel heater coil and from engine control unit connector A.Press the START/STOP button.Check that the voltage across pin 5 of the control unitSee K100 and the earth is greater than 0.3 V. | Repair or if necessary replace the electrical wiring between the water presence sensor and the engine control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 3 | Press the START/STOP button. Check that the resistance across Pin 5 of the sensorSee K100 and the earth is more than 500 kOhm. | Repair or if necessary replace the electrical wiring between the water presence sensor and the engine control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 4 | Check that the resistance across pin 5 of the sensorSee K100 and pin 74 of the control unit See M010 ENGINE MANAGEMENT ECU is less than 5 Ohms | Repair or if necessary replace the electrical wiring between the water presence sensor and the engine control unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 5 | Connect a shunt cable with fuse between pin 72 of control unit connector A See M010 ENGINE MANAGEMENT ECU and the earth.Check that the voltage across pin 3 of the control unitSee K100 and the earth is greater than 11 V. | Repair or if necessary replace the electrical wiring between the water presence sensor and the engine compartment junction unit See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 6 | Check that the resistance across pin 4 of the sensorSee K100 and the earth is greater than 5 Ohms. | Repair or if necessary replace the electrical wiring between the water presence sensor and earth See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT |
| 7 | Replace the water presence sensor Op. 1060G30 WATER PRESENCE SENSOR IN FUEL FILTER - R.R. | Repair the original sensor and replace the engine control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |