| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|
| 1 | Connect a charged battery in paralle with the vehicle battery.Start the engine.Move on to Step 13 | Move on to Step 2 |
| 2 | Turn the ignition key OFF.Disconnect the cable loom connector from the engine management control unit connector A.Do not engage any gear.Turn the ignition ON. Connect the emergency starting lead for a maximum of 3 secs. between pin 72 (wiring side) of the control unit See M010 ENGINE MANAGEMENT ECU and the earth, checking that the engine does not start | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R |
| 3 | Turn the ignition OFF. Extract relay T18 from the engine compartment junction unit (it is the top one in the middle row).Turn the ignition key ON.Measure the voltage between Pin 86 of the base unit and Earth, ensuring it is less than 0.3 V.Move on to Step 5 | Move on to Step 4 |
| 4 | If faults are present, repair or, if necessary, replace the electrical wiring between the engine management control unit and the engine compartment junction unit. See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The test can be considered over | Replace the engine compartment junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 5 | Turn the ignition OFF. Measure the resistance between pin 72 (wiring side) of the control unit See M010 ENGINE MANAGEMENT ECU and pin 86 of the base for relay T18, checking that it is less than 5 Ohm | Move on to Step 4 |
| 6 | Measure the voltage between Pin 30 of the base unit for relay T18 and the earth, ensuring it is greater than 11 V.Move on to Step 8 | Move on to Step 7 |
| 7 | If faults are present, repair or, if necessary, replace the electrical wiring between the battery and the engine compartment junction unit. See E1010 POWER SUPPLY The test can be considered over | Replace the engine compartment junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 8 | Connect the emergency starting lead for a maximum of 3 secs. between pins 30 and 87 of the base for relay T18 checking that the engine does not start.Move on to Step 12 | Move on to Step 9 |
| 9 | Measure the resistance between pin 87 of the base for relay T18 and pin 50 wiring side of the starter motor See A020 STARTER MOTOR , checking that it is less than 5 Ohm.Move on to Step 11 | Move on to Step 10 |
| 10 | If faults are present, repair or if necessary replace the electrical wiring between the engine compartment junction unit and the starter motor See E5010 STARTING AND RECHARING The test can be considered over | Replace the engine compartment junction unit Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. |
| 11 | If faults are present, repair or if necessary replace the electrical wiring between the battery, starter motor and earth See E5010 STARTING AND RECHARING The test can be considered over | Replace the starter motor Op. 5520B10 STARTER MOTOR - R+R |
| 12 | Turn the ignition ON. Measure the voltage between Pin 85 of the base unit for relay T18 and the earth, ensuring it is less than 11 V.Move on to Step 10 | Replace the starter motor Op. 5520B10 STARTER MOTOR - R+R |
| 13 | Turn the ignition key to the OFF position and extract it.Turn off all the electrical users.Charge or, if necessary, replace the battery.Disconnect the connector from the battery cable loom.Measure the current between pin A (wiring side) and pin A (component side) of the battery, checking that it is less than 80 mA.Move on to Step 15 | Move on to Step 14 |
| STEP | CHECK TO BE PERFORMED | RESOLUTION IF THE CHECK IS NOT OK |
|---|
| 14 | The stall current for one or more consumers is too high.During the search for faults in the wiring, the sections of the wiring for the allocated connectors can be separated.When the stall current moves to the permitted value, after the section has been separated, this means that the fault is located in this section of the wiring.The test can be considered over | |
| 15 | Reconnect the connector to the battery cable loom.Start the engine and switch on all the electrical consumers.Let the engine speed reach 3000 rpm.Measure the voltage between pin A and pin B of the battery (wiring side), checking that it is less than 12.5 V | Replace the battery Op. 5530B10 BATTERY - R+R |
| 16 | Turn the ignition key OFF.Disconnect the connector from the alternator cable loom.Turn the ignition key ON.Measure the voltage between pin D+ (wiring side) of the alternator See A010 ALTERNATOR and the earth, checking it is greater than 11 V | Move on to Step 18 |
| 17 | If faults are present, repair or if necessary replace the electrical wiring between the battery, alternator and earth See E5010 STARTING AND RECHARING The test can be considered over | Replace the alternator. Op. 5530A10 ALTERNATOR - R+R |
| 18 | If faults are present, repair or if necessary replace the electrical wiring between the alternator and the engine management control unit See E5010 STARTING AND RECHARING | Replace the engine management control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R |
