| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|
| 1 | Press the START/STOP button and turn off the engine.Reconnect any disconnected componentsTurn off all the electrical users.Press the START/STOP button.In the under-dashboard junction unit baseinsert a new fuse F35 (second from the right in the upper row) and check it cuts in.Move on to Step 3 | A temporary current overload has occurred in the system behind fuse F35. move on to Step 2 |
| 2 | If faults are present, restore the correct operation of the under-dashboard control unit wiring.Replace it if necessary.The test can be considered over | Replace the junction unitOp. 5505A18 |
| 3 | Press the START/STOP button.Disconnect the wiring harness connector from the brake pedal switch.Press the START/STOP button.Check that fuse F35 does not cut in | Move on to Step 6 |
| 4 | Connect a shunt cable with a fuse between sensor Pin 4 of the switch See I030 BRAKE PEDAL SWITCH and the battery positive See A001 BATTERY Check the brake lights do not come on | Replace the brake pedal switch Op. 5550D10 BRAKE LIGHT SWITCH - R+R |
| 5 | If faults are present, restore the correct operation of the wiring between the engine control unit and the brake pedal switch See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT Replace if necessary. The test is complete | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - .R |
| 6 | Press the START/STOP button.Disconnect the wiring harness connector from the air flow meter.Press the START/STOP button.Check that fuse F35 cuts in | Replace the debimeter Op. 1060G10 AIR FLOW METER - R.R. |
| 7 | Press the START/STOP button.Disconnect the wiring harness connector from the accelerator pedal potentiometerPress the START/STOP button.Check that fuse F35 cuts in | Replace the accelerator pedal Op. 1068A20 ACCELERATOR PEDAL WITH BUILT-IN POTENTIOMETER - R.R |
| 8 | Press the START/STOP button.Disconnect the wiring harness connector from the temperature sensor and heater coilPress the START/STOP button.Check that fuse F35 cuts in | Replace the fuel heaterOp. 1044D10 |
| 9 | Check and restore the correct electrical connections between the engine compartment junction unit and components tested See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT Replace the wiring if necessary | Replace the junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |